#include <stdarg.h>
#include <stdbool.h>
+#include "diagnostic.h"
+#include "format_check.h"
#include "parser.h"
#include "lexer.h"
#include "token_t.h"
+#include "types.h"
#include "type_t.h"
#include "type_hash.h"
#include "ast_t.h"
+#include "lang_features.h"
#include "adt/bitfiddle.h"
#include "adt/error.h"
#include "adt/array.h"
//#define PRINT_TOKENS
//#define ABORT_ON_ERROR
#define MAX_LOOKAHEAD 2
-//#define STRICT_C99
typedef struct {
declaration_t *old_declaration;
unsigned short namespc;
} stack_entry_t;
+typedef struct declaration_specifiers_t declaration_specifiers_t;
+struct declaration_specifiers_t {
+ source_position_t source_position;
+ unsigned char storage_class;
+ bool is_inline;
+ decl_modifiers_t decl_modifiers;
+ type_t *type;
+};
+
+typedef declaration_t* (*parsed_declaration_func) (declaration_t *declaration);
+
static token_t token;
static token_t lookahead_buffer[MAX_LOOKAHEAD];
static int lookahead_bufpos;
static declaration_t *last_declaration = NULL;
static declaration_t *current_function = NULL;
static struct obstack temp_obst;
-static bool found_error;
-
-static type_t *type_int = NULL;
-static type_t *type_long_double = NULL;
-static type_t *type_double = NULL;
-static type_t *type_float = NULL;
-static type_t *type_char = NULL;
-static type_t *type_string = NULL;
-static type_t *type_void = NULL;
-static type_t *type_void_ptr = NULL;
-static type_t *type_size_t = NULL;
-static type_t *type_ptrdiff_t = NULL;
+
+#define HERE token.source_position
+
+static type_t *type_valist;
static statement_t *parse_compound_statement(void);
static statement_t *parse_statement(void);
static expression_t *parse_expression(void);
static type_t *parse_typename(void);
+static void parse_compound_type_entries(void);
+static declaration_t *parse_declarator(
+ const declaration_specifiers_t *specifiers, bool may_be_abstract);
+static declaration_t *record_declaration(declaration_t *declaration);
+
+static void semantic_comparison(binary_expression_t *expression);
+
#define STORAGE_CLASSES \
case T_typedef: \
case T_extern: \
case T_const: \
case T_restrict: \
case T_volatile: \
- case T_inline:
+ case T_inline: \
+ case T_forceinline:
#ifdef PROVIDE_COMPLEX
#define COMPLEX_SPECIFIERS \
#define IMAGINARY_SPECIFIERS
#endif
-#define TYPE_SPECIFIERS \
- case T_void: \
- case T_char: \
- case T_short: \
- case T_int: \
- case T_long: \
- case T_float: \
- case T_double: \
- case T_signed: \
- case T_unsigned: \
- case T__Bool: \
- case T_struct: \
- case T_union: \
- case T_enum: \
- case T___typeof__: \
- COMPLEX_SPECIFIERS \
+#define TYPE_SPECIFIERS \
+ case T_void: \
+ case T_char: \
+ case T_short: \
+ case T_int: \
+ case T_long: \
+ case T_float: \
+ case T_double: \
+ case T_signed: \
+ case T_unsigned: \
+ case T__Bool: \
+ case T_struct: \
+ case T_union: \
+ case T_enum: \
+ case T___typeof__: \
+ case T___builtin_va_list: \
+ COMPLEX_SPECIFIERS \
IMAGINARY_SPECIFIERS
#define DECLARATION_START \
TYPE_QUALIFIERS \
TYPE_SPECIFIERS
+/**
+ * Allocate an AST node with given size and
+ * initialize all fields with zero.
+ */
static void *allocate_ast_zero(size_t size)
{
void *res = allocate_ast(size);
return res;
}
-static size_t get_statement_struct_size(statement_type_t type)
+/**
+ * Returns the size of a statement node.
+ *
+ * @param kind the statement kind
+ */
+static size_t get_statement_struct_size(statement_kind_t kind)
{
static const size_t sizes[] = {
[STATEMENT_COMPOUND] = sizeof(compound_statement_t),
[STATEMENT_FOR] = sizeof(for_statement_t),
[STATEMENT_ASM] = sizeof(asm_statement_t)
};
- assert(sizeof(sizes) / sizeof(sizes[0]) == STATEMENT_ASM + 1);
- assert(type <= STATEMENT_ASM);
- assert(sizes[type] != 0);
- return sizes[type];
+ assert(kind <= sizeof(sizes) / sizeof(sizes[0]));
+ assert(sizes[kind] != 0);
+ return sizes[kind];
}
-static statement_t *allocate_statement_zero(statement_type_t type)
+/**
+ * Allocate a statement node of given kind and initialize all
+ * fields with zero.
+ */
+static statement_t *allocate_statement_zero(statement_kind_t kind)
{
- size_t size = get_statement_struct_size(type);
+ size_t size = get_statement_struct_size(kind);
statement_t *res = allocate_ast_zero(size);
- res->base.type = type;
+ res->base.kind = kind;
return res;
}
-
-static size_t get_expression_struct_size(expression_type_t type)
+/**
+ * Returns the size of an expression node.
+ *
+ * @param kind the expression kind
+ */
+static size_t get_expression_struct_size(expression_kind_t kind)
{
static const size_t sizes[] = {
- [EXPR_INVALID] = sizeof(expression_base_t),
- [EXPR_REFERENCE] = sizeof(reference_expression_t),
- [EXPR_CONST] = sizeof(const_expression_t),
- [EXPR_STRING_LITERAL] = sizeof(string_literal_expression_t),
- [EXPR_CALL] = sizeof(call_expression_t),
- [EXPR_UNARY] = sizeof(unary_expression_t),
- [EXPR_BINARY] = sizeof(binary_expression_t),
- [EXPR_CONDITIONAL] = sizeof(conditional_expression_t),
- [EXPR_SELECT] = sizeof(select_expression_t),
- [EXPR_ARRAY_ACCESS] = sizeof(array_access_expression_t),
- [EXPR_SIZEOF] = sizeof(sizeof_expression_t),
- [EXPR_CLASSIFY_TYPE] = sizeof(classify_type_expression_t),
- [EXPR_FUNCTION] = sizeof(string_literal_expression_t),
- [EXPR_PRETTY_FUNCTION] = sizeof(string_literal_expression_t),
- [EXPR_BUILTIN_SYMBOL] = sizeof(builtin_symbol_expression_t),
- [EXPR_OFFSETOF] = sizeof(offsetof_expression_t),
- [EXPR_VA_ARG] = sizeof(va_arg_expression_t),
- [EXPR_STATEMENT] = sizeof(statement_expression_t)
+ [EXPR_INVALID] = sizeof(expression_base_t),
+ [EXPR_REFERENCE] = sizeof(reference_expression_t),
+ [EXPR_CONST] = sizeof(const_expression_t),
+ [EXPR_STRING_LITERAL] = sizeof(string_literal_expression_t),
+ [EXPR_WIDE_STRING_LITERAL] = sizeof(wide_string_literal_expression_t),
+ [EXPR_CALL] = sizeof(call_expression_t),
+ [EXPR_UNARY_FIRST] = sizeof(unary_expression_t),
+ [EXPR_BINARY_FIRST] = sizeof(binary_expression_t),
+ [EXPR_CONDITIONAL] = sizeof(conditional_expression_t),
+ [EXPR_SELECT] = sizeof(select_expression_t),
+ [EXPR_ARRAY_ACCESS] = sizeof(array_access_expression_t),
+ [EXPR_SIZEOF] = sizeof(sizeof_expression_t),
+ [EXPR_CLASSIFY_TYPE] = sizeof(classify_type_expression_t),
+ [EXPR_FUNCTION] = sizeof(string_literal_expression_t),
+ [EXPR_PRETTY_FUNCTION] = sizeof(string_literal_expression_t),
+ [EXPR_BUILTIN_SYMBOL] = sizeof(builtin_symbol_expression_t),
+ [EXPR_BUILTIN_CONSTANT_P] = sizeof(builtin_constant_expression_t),
+ [EXPR_BUILTIN_PREFETCH] = sizeof(builtin_prefetch_expression_t),
+ [EXPR_OFFSETOF] = sizeof(offsetof_expression_t),
+ [EXPR_VA_START] = sizeof(va_start_expression_t),
+ [EXPR_VA_ARG] = sizeof(va_arg_expression_t),
+ [EXPR_STATEMENT] = sizeof(statement_expression_t),
};
- assert(sizeof(sizes) / sizeof(sizes[0]) == EXPR_STATEMENT + 1);
- assert(type <= EXPR_STATEMENT);
- assert(sizes[type] != 0);
- return sizes[type];
+ if(kind >= EXPR_UNARY_FIRST && kind <= EXPR_UNARY_LAST) {
+ return sizes[EXPR_UNARY_FIRST];
+ }
+ if(kind >= EXPR_BINARY_FIRST && kind <= EXPR_BINARY_LAST) {
+ return sizes[EXPR_BINARY_FIRST];
+ }
+ assert(kind <= sizeof(sizes) / sizeof(sizes[0]));
+ assert(sizes[kind] != 0);
+ return sizes[kind];
}
-static expression_t *allocate_expression_zero(expression_type_t type)
+/**
+ * Allocate an expression node of given kind and initialize all
+ * fields with zero.
+ */
+static expression_t *allocate_expression_zero(expression_kind_t kind)
{
- size_t size = get_expression_struct_size(type);
+ size_t size = get_expression_struct_size(kind);
expression_t *res = allocate_ast_zero(size);
- res->base.type = type;
+ res->base.kind = kind;
return res;
}
-static size_t get_type_struct_size(type_type_t type)
+/**
+ * Returns the size of a type node.
+ *
+ * @param kind the type kind
+ */
+static size_t get_type_struct_size(type_kind_t kind)
{
static const size_t sizes[] = {
[TYPE_ATOMIC] = sizeof(atomic_type_t),
+ [TYPE_BITFIELD] = sizeof(bitfield_type_t),
[TYPE_COMPOUND_STRUCT] = sizeof(compound_type_t),
[TYPE_COMPOUND_UNION] = sizeof(compound_type_t),
[TYPE_ENUM] = sizeof(enum_type_t),
[TYPE_TYPEOF] = sizeof(typeof_type_t),
};
assert(sizeof(sizes) / sizeof(sizes[0]) == (int) TYPE_TYPEOF + 1);
- assert(type <= TYPE_TYPEOF);
- assert(sizes[type] != 0);
- return sizes[type];
+ assert(kind <= TYPE_TYPEOF);
+ assert(sizes[kind] != 0);
+ return sizes[kind];
}
-static type_t *allocate_type_zero(type_type_t type)
+/**
+ * Allocate a type node of given kind and initialize all
+ * fields with zero.
+ */
+static type_t *allocate_type_zero(type_kind_t kind)
{
- size_t size = get_type_struct_size(type);
+ size_t size = get_type_struct_size(kind);
type_t *res = obstack_alloc(type_obst, size);
memset(res, 0, size);
- res->base.type = type;
+ res->base.kind = kind;
return res;
}
-static size_t get_initializer_size(initializer_type_t type)
+/**
+ * Returns the size of an initializer node.
+ *
+ * @param kind the initializer kind
+ */
+static size_t get_initializer_size(initializer_kind_t kind)
{
static const size_t sizes[] = {
- [INITIALIZER_VALUE] = sizeof(initializer_value_t),
- [INITIALIZER_STRING] = sizeof(initializer_string_t),
- [INITIALIZER_LIST] = sizeof(initializer_list_t)
+ [INITIALIZER_VALUE] = sizeof(initializer_value_t),
+ [INITIALIZER_STRING] = sizeof(initializer_string_t),
+ [INITIALIZER_WIDE_STRING] = sizeof(initializer_wide_string_t),
+ [INITIALIZER_LIST] = sizeof(initializer_list_t)
};
- assert(type < INITIALIZER_COUNT);
- assert(sizes[type] != 0);
- return sizes[type];
+ assert(kind < sizeof(sizes) / sizeof(*sizes));
+ assert(sizes[kind] != 0);
+ return sizes[kind];
}
-static initializer_t *allocate_initializer(initializer_type_t type)
+/**
+ * Allocate an initializer node of given kind and initialize all
+ * fields with zero.
+ */
+static initializer_t *allocate_initializer_zero(initializer_kind_t kind)
{
- initializer_t *result = allocate_ast_zero(get_initializer_size(type));
- result->type = type;
+ initializer_t *result = allocate_ast_zero(get_initializer_size(kind));
+ result->kind = kind;
return result;
}
+/**
+ * Free a type from the type obstack.
+ */
static void free_type(void *type)
{
obstack_free(type_obst, type);
}
/**
- * returns the top element of the environment stack
+ * Returns the index of the top element of the environment stack.
*/
static size_t environment_top(void)
{
return ARR_LEN(environment_stack);
}
+/**
+ * Returns the index of the top element of the label stack.
+ */
static size_t label_top(void)
{
return ARR_LEN(label_stack);
}
-
+/**
+ * Return the next token.
+ */
static inline void next_token(void)
{
token = lookahead_buffer[lookahead_bufpos];
#endif
}
+/**
+ * Return the next token with a given lookahead.
+ */
static inline const token_t *look_ahead(int num)
{
assert(num > 0 && num <= MAX_LOOKAHEAD);
int pos = (lookahead_bufpos+num-1) % MAX_LOOKAHEAD;
- return & lookahead_buffer[pos];
+ return &lookahead_buffer[pos];
}
#define eat(token_type) do { assert(token.type == token_type); next_token(); } while(0)
-static void error(void)
-{
- found_error = true;
-#ifdef ABORT_ON_ERROR
- abort();
-#endif
-}
-
-static void parser_print_prefix_pos(const source_position_t source_position)
-{
- fputs(source_position.input_name, stderr);
- fputc(':', stderr);
- fprintf(stderr, "%u", source_position.linenr);
- fputs(": ", stderr);
-}
-
-static void parser_print_error_prefix_pos(
- const source_position_t source_position)
-{
- parser_print_prefix_pos(source_position);
- fputs("error: ", stderr);
- error();
-}
-
-static void parser_print_error_prefix(void)
-{
- parser_print_error_prefix_pos(token.source_position);
-}
-
-static void parse_error(const char *message)
-{
- parser_print_error_prefix();
- fprintf(stderr, "parse error: %s\n", message);
-}
-
-static void parser_print_warning_prefix_pos(
- const source_position_t source_position)
-{
- parser_print_prefix_pos(source_position);
- fputs("warning: ", stderr);
-}
-
-static void parse_warning_pos(const source_position_t source_position,
- const char *const message)
-{
- parser_print_prefix_pos(source_position);
- fprintf(stderr, "warning: %s\n", message);
-}
-
-static void parse_warning(const char *message)
-{
- parse_warning_pos(token.source_position, message);
-}
-
+/**
+ * Report a parse error because an expected token was not found.
+ */
static void parse_error_expected(const char *message, ...)
{
- va_list args;
- int first = 1;
-
if(message != NULL) {
- parser_print_error_prefix();
- fprintf(stderr, "%s\n", message);
+ errorf(HERE, "%s", message);
}
- parser_print_error_prefix();
- fputs("Parse error: got ", stderr);
- print_token(stderr, &token);
- fputs(", expected ", stderr);
-
- va_start(args, message);
- token_type_t token_type = va_arg(args, token_type_t);
- while(token_type != 0) {
- if(first == 1) {
- first = 0;
- } else {
- fprintf(stderr, ", ");
- }
- print_token_type(stderr, token_type);
- token_type = va_arg(args, token_type_t);
- }
- va_end(args);
- fprintf(stderr, "\n");
-}
-
-static void print_type_quoted(type_t *type)
-{
- fputc('\'', stderr);
- print_type(type);
- fputc('\'', stderr);
+ va_list ap;
+ va_start(ap, message);
+ errorf(HERE, "got '%K', expected %#k", &token, &ap, ", ");
+ va_end(ap);
}
+/**
+ * Report a type error.
+ */
static void type_error(const char *msg, const source_position_t source_position,
type_t *type)
{
- parser_print_error_prefix_pos(source_position);
- fprintf(stderr, "%s, but found type ", msg);
- print_type_quoted(type);
- fputc('\n', stderr);
+ errorf(source_position, "%s, but found type '%T'", msg, type);
}
+/**
+ * Report an incompatible type.
+ */
static void type_error_incompatible(const char *msg,
const source_position_t source_position, type_t *type1, type_t *type2)
{
- parser_print_error_prefix_pos(source_position);
- fprintf(stderr, "%s, incompatible types: ", msg);
- print_type_quoted(type1);
- fprintf(stderr, " - ");
- print_type_quoted(type2);
- fprintf(stderr, ")\n");
+ errorf(source_position, "%s, incompatible types: '%T' - '%T'", msg, type1, type2);
}
+/**
+ * Eat an complete block, ie. '{ ... }'.
+ */
static void eat_block(void)
{
if(token.type == '{')
eat('}');
}
+/**
+ * Eat a statement until an ';' token.
+ */
static void eat_statement(void)
{
while(token.type != ';') {
eat(';');
}
-static void eat_brace(void)
+/**
+ * Eat a parenthesed term, ie. '( ... )'.
+ */
+static void eat_paren(void)
{
if(token.type == '(')
next_token();
return;
}
if(token.type == '(') {
- eat_brace();
+ eat_paren();
continue;
}
if(token.type == '{') {
}
/**
- * called when we find a 2nd declarator for an identifier we already have a
- * declarator for
+ * Called when we find a 2nd declarator for an identifier we already have a
+ * declarator for.
*/
-static bool is_compatible_declaration (declaration_t *declaration,
+static bool is_compatible_declaration(declaration_t *declaration,
declaration_t *previous)
{
- if (declaration->type->type == TYPE_FUNCTION &&
- previous->type->type == TYPE_FUNCTION &&
- previous->type->function.unspecified_parameters) {
- function_type_t* const prev_func = &previous->type->function;
- function_type_t* const decl_func = &declaration->type->function;
- if (prev_func->unspecified_parameters &&
- prev_func->result_type == decl_func->result_type) {
- declaration->type = previous->type;
- return true;
- }
+ /* happens for K&R style function parameters */
+ if(previous->type == NULL) {
+ previous->type = declaration->type;
+ return true;
}
- /* TODO: not correct yet */
- return declaration->type == previous->type;
+
+ type_t *type1 = skip_typeref(declaration->type);
+ type_t *type2 = skip_typeref(previous->type);
+
+ return types_compatible(type1, type2);
}
+/**
+ * Search a symbol in a given namespace and returns its declaration or
+ * NULL if this symbol was not found.
+ */
static declaration_t *get_declaration(symbol_t *symbol, namespace_t namespc)
{
declaration_t *declaration = symbol->declaration;
return NULL;
}
+/**
+ * Return the "prefix" of a given namespace.
+ */
static const char *get_namespace_prefix(namespace_t namespc)
{
switch(namespc) {
namespace_t namespc = (namespace_t)declaration->namespc;
/* a declaration should be only pushed once */
- assert(declaration->parent_context == NULL);
declaration->parent_context = parent_context;
declaration_t *previous_declaration = get_declaration(symbol, namespc);
if(previous_declaration != NULL
&& previous_declaration->parent_context == context) {
if(!is_compatible_declaration(declaration, previous_declaration)) {
- parser_print_error_prefix_pos(declaration->source_position);
- fprintf(stderr, "definition of symbol %s%s with type ",
- get_namespace_prefix(namespc), symbol->string);
- print_type_quoted(declaration->type);
- fputc('\n', stderr);
- parser_print_error_prefix_pos(
- previous_declaration->source_position);
- fprintf(stderr, "is incompatible with previous declaration "
- "of type ");
- print_type_quoted(previous_declaration->type);
- fputc('\n', stderr);
+ errorf(declaration->source_position, "definition of symbol '%s%Y' with type '%T'", get_namespace_prefix(namespc), symbol, declaration->type);
+ errorf(previous_declaration->source_position, "is incompatible with previous declaration of type '%T'", previous_declaration->type);
} else {
- unsigned old_storage_class = previous_declaration->storage_class;
- unsigned new_storage_class = declaration->storage_class;
+ unsigned old_storage_class = previous_declaration->storage_class;
+ unsigned new_storage_class = declaration->storage_class;
+ type_t *type = previous_declaration->type;
+ type = skip_typeref(type);
+
if (current_function == NULL) {
if (old_storage_class != STORAGE_CLASS_STATIC &&
new_storage_class == STORAGE_CLASS_STATIC) {
- parser_print_error_prefix_pos(declaration->source_position);
- fprintf(stderr,
- "static declaration of '%s' follows non-static declaration\n",
- symbol->string);
- parser_print_error_prefix_pos(previous_declaration->source_position);
- fprintf(stderr, "previous declaration of '%s' was here\n",
- symbol->string);
+ errorf(declaration->source_position, "static declaration of '%Y' follows non-static declaration", symbol);
+ errorf(previous_declaration->source_position, "previous declaration of '%Y' was here", symbol);
} else {
if (old_storage_class == STORAGE_CLASS_EXTERN) {
if (new_storage_class == STORAGE_CLASS_NONE) {
previous_declaration->storage_class = STORAGE_CLASS_NONE;
}
- } else {
- parser_print_warning_prefix_pos(declaration->source_position);
- fprintf(stderr, "redundant declaration for '%s'\n",
- symbol->string);
- parser_print_warning_prefix_pos(previous_declaration->source_position);
- fprintf(stderr, "previous declaration of '%s' was here\n",
- symbol->string);
+ } else if(!is_type_function(type)) {
+ warningf(declaration->source_position, "redundant declaration for '%Y'", symbol);
+ warningf(previous_declaration->source_position, "previous declaration of '%Y' was here", symbol);
}
}
} else {
if (old_storage_class == STORAGE_CLASS_EXTERN &&
new_storage_class == STORAGE_CLASS_EXTERN) {
- parser_print_warning_prefix_pos(declaration->source_position);
- fprintf(stderr, "redundant extern declaration for '%s'\n",
- symbol->string);
- parser_print_warning_prefix_pos(previous_declaration->source_position);
- fprintf(stderr, "previous declaration of '%s' was here\n",
- symbol->string);
+ warningf(declaration->source_position, "redundant extern declaration for '%Y'\n", symbol);
+ warningf(previous_declaration->source_position, "previous declaration of '%Y' was here\n", symbol);
} else {
- parser_print_error_prefix_pos(declaration->source_position);
if (old_storage_class == new_storage_class) {
- fprintf(stderr, "redeclaration of '%s'\n", symbol->string);
+ errorf(declaration->source_position, "redeclaration of '%Y'", symbol);
} else {
- fprintf(stderr, "redeclaration of '%s' with different linkage\n", symbol->string);
+ errorf(declaration->source_position, "redeclaration of '%Y' with different linkage", symbol);
}
- parser_print_error_prefix_pos(previous_declaration->source_position);
- fprintf(stderr, "previous declaration of '%s' was here\n",
- symbol->string);
+ errorf(previous_declaration->source_position, "previous declaration of '%Y' was here", symbol);
}
}
}
return;
for(i = top; i > new_top; --i) {
- stack_entry_t *entry = & stack[i - 1];
+ stack_entry_t *entry = &stack[i - 1];
declaration_t *old_declaration = entry->old_declaration;
symbol_t *symbol = entry->symbol;
static int get_rank(const type_t *type)
{
+ assert(!is_typeref(type));
/* The C-standard allows promoting to int or unsigned int (see § 7.2.2
* and esp. footnote 108). However we can't fold constants (yet), so we
- * can't decide wether unsigned int is possible, while int always works.
+ * can't decide whether unsigned int is possible, while int always works.
* (unsigned int would be preferable when possible... for stuff like
* struct { enum { ... } bla : 4; } ) */
- if(type->type == TYPE_ENUM)
+ if(type->kind == TYPE_ENUM)
return ATOMIC_TYPE_INT;
- assert(type->type == TYPE_ATOMIC);
+ assert(type->kind == TYPE_ATOMIC);
const atomic_type_t *atomic_type = &type->atomic;
atomic_type_type_t atype = atomic_type->atype;
return atype;
static type_t *promote_integer(type_t *type)
{
+ if(type->kind == TYPE_BITFIELD)
+ return promote_integer(type->bitfield.base);
+
if(get_rank(type) < ATOMIC_TYPE_INT)
type = type_int;
return type;
}
+/**
+ * Create a cast expression.
+ *
+ * @param expression the expression to cast
+ * @param dest_type the destination type
+ */
static expression_t *create_cast_expression(expression_t *expression,
type_t *dest_type)
{
- expression_t *cast = allocate_expression_zero(EXPR_UNARY);
+ expression_t *cast = allocate_expression_zero(EXPR_UNARY_CAST_IMPLICIT);
- cast->unary.type = UNEXPR_CAST_IMPLICIT;
cast->unary.value = expression;
cast->base.datatype = dest_type;
return cast;
}
-static bool is_null_expression(const expression_t *const expression)
+/**
+ * Check if a given expression represents the 0 pointer constant.
+ */
+static bool is_null_pointer_constant(const expression_t *expression)
{
- if (expression->type != EXPR_CONST)
+ /* skip void* cast */
+ if(expression->kind == EXPR_UNARY_CAST
+ || expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
+ expression = expression->unary.value;
+ }
+
+ /* TODO: not correct yet, should be any constant integer expression
+ * which evaluates to 0 */
+ if (expression->kind != EXPR_CONST)
return false;
type_t *const type = skip_typeref(expression->base.datatype);
return expression->conste.v.int_value == 0;
}
+/**
+ * Create an implicit cast expression.
+ *
+ * @param expression the expression to cast
+ * @param dest_type the destination type
+ */
static expression_t *create_implicit_cast(expression_t *expression,
type_t *dest_type)
{
if(source_type == dest_type)
return expression;
- switch (dest_type->type) {
+ switch (dest_type->kind) {
case TYPE_ENUM:
/* TODO warning for implicitly converting to enum */
+ case TYPE_BITFIELD:
case TYPE_ATOMIC:
- if (source_type->type != TYPE_ATOMIC &&
- source_type->type != TYPE_ENUM) {
+ if (source_type->kind != TYPE_ATOMIC &&
+ source_type->kind != TYPE_ENUM &&
+ source_type->kind != TYPE_BITFIELD) {
panic("casting of non-atomic types not implemented yet");
}
return create_cast_expression(expression, dest_type);
case TYPE_POINTER:
- switch (source_type->type) {
+ switch (source_type->kind) {
case TYPE_ATOMIC:
- if (is_null_expression(expression)) {
+ if (is_null_pointer_constant(expression)) {
return create_cast_expression(expression, dest_type);
}
break;
type_t *const type_right = skip_typeref(orig_type_right);
if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
- (is_type_pointer(type_left) && is_null_expression(*right)) ||
+ (is_type_pointer(type_left) && is_null_pointer_constant(*right)) ||
(is_type_atomic(type_left, ATOMIC_TYPE_BOOL)
&& is_type_pointer(type_right))) {
*right = create_implicit_cast(*right, type_left);
points_to_left = skip_typeref(points_to_left);
points_to_right = skip_typeref(points_to_right);
- if(!is_type_atomic(points_to_left, ATOMIC_TYPE_VOID)
- && !is_type_atomic(points_to_right, ATOMIC_TYPE_VOID)
- && !types_compatible(points_to_left, points_to_right)) {
- goto incompatible_assign_types;
- }
-
/* the left type has all qualifiers from the right type */
unsigned missing_qualifiers
= points_to_right->base.qualifiers & ~points_to_left->base.qualifiers;
if(missing_qualifiers != 0) {
- parser_print_error_prefix();
- fprintf(stderr, "destination type ");
- print_type_quoted(type_left);
- fprintf(stderr, " in %s from type ", context);
- print_type_quoted(type_right);
- fprintf(stderr, " lacks qualifiers '");
- print_type_qualifiers(missing_qualifiers);
- fprintf(stderr, "' in pointed-to type\n");
+ errorf(HERE, "destination type '%T' in %s from type '%T' lacks qualifiers '%Q' in pointed-to type", type_left, context, type_right, missing_qualifiers);
return;
}
+ points_to_left = get_unqualified_type(points_to_left);
+ points_to_right = get_unqualified_type(points_to_right);
+
+ if(!is_type_atomic(points_to_left, ATOMIC_TYPE_VOID)
+ && !is_type_atomic(points_to_right, ATOMIC_TYPE_VOID)
+ && !types_compatible(points_to_left, points_to_right)) {
+ goto incompatible_assign_types;
+ }
+
*right = create_implicit_cast(*right, type_left);
return;
}
incompatible_assign_types:
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "incompatible types in %s\n", context);
- parser_print_error_prefix();
- print_type_quoted(type_left);
- fputs(" <- ", stderr);
- print_type_quoted(type_right);
- fputs("\n", stderr);
+ errorf(HERE, "incompatible types in %s", context);
+ errorf(HERE, "'%T' <- '%T'", orig_type_left, orig_type_right);
}
static expression_t *parse_constant_expression(void)
{
/* start parsing at precedence 7 (conditional expression) */
- return parse_sub_expression(7);
+ expression_t *result = parse_sub_expression(7);
+
+ if(!is_constant_expression(result)) {
+ errorf(result->base.source_position, "expression '%E' is not constant\n", result);
+ }
+
+ return result;
}
static expression_t *parse_assignment_expression(void)
return parse_sub_expression(2);
}
-typedef struct declaration_specifiers_t declaration_specifiers_t;
-struct declaration_specifiers_t {
- unsigned char storage_class;
- bool is_inline;
- type_t *type;
-};
+static type_t *make_global_typedef(const char *name, type_t *type)
+{
+ symbol_t *const symbol = symbol_table_insert(name);
-static void parse_compound_type_entries(void);
-static declaration_t *parse_declarator(
- const declaration_specifiers_t *specifiers, type_t *type,
- bool may_be_abstract);
-static declaration_t *record_declaration(declaration_t *declaration);
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+ declaration->namespc = NAMESPACE_NORMAL;
+ declaration->storage_class = STORAGE_CLASS_TYPEDEF;
+ declaration->type = type;
+ declaration->symbol = symbol;
+ declaration->source_position = builtin_source_position;
+
+ record_declaration(declaration);
+
+ type_t *typedef_type = allocate_type_zero(TYPE_TYPEDEF);
+ typedef_type->typedeft.declaration = declaration;
+
+ return typedef_type;
+}
static const char *parse_string_literals(void)
{
while(depth > 0) {
switch(token.type) {
case T_EOF:
- parse_error("EOF while parsing attribute");
+ errorf(HERE, "EOF while parsing attribute");
break;
case '(':
next_token();
if(token.type != T_STRING_LITERAL) {
parse_error_expected("while parsing assembler attribute",
T_STRING_LITERAL);
- eat_brace();
+ eat_paren();
break;
} else {
parse_string_literals();
/* TODO: check len vs. size of array type */
(void) type;
- initializer_t *initializer = allocate_initializer(INITIALIZER_STRING);
+ initializer_t *initializer = allocate_initializer_zero(INITIALIZER_STRING);
initializer->string.string = string;
return initializer;
}
+static initializer_t *initializer_from_wide_string(array_type_t *const type,
+ wide_string_t *const string)
+{
+ /* TODO: check len vs. size of array type */
+ (void) type;
+
+ initializer_t *const initializer =
+ allocate_initializer_zero(INITIALIZER_WIDE_STRING);
+ initializer->wide_string.string = *string;
+
+ return initializer;
+}
+
static initializer_t *initializer_from_expression(type_t *type,
expression_t *expression)
{
/* TODO check that expression is a constant expression */
/* § 6.7.8.14/15 char array may be initialized by string literals */
- if(type->type == TYPE_ARRAY && expression->type == EXPR_STRING_LITERAL) {
- array_type_t *array_type = &type->array;
- type_t *element_type = array_type->element_type;
-
- if(element_type->type == TYPE_ATOMIC) {
- atomic_type_t *atomic_type = &element_type->atomic;
- atomic_type_type_t atype = atomic_type->atype;
+ type_t *const expr_type = expression->base.datatype;
+ if (is_type_array(type) && expr_type->kind == TYPE_POINTER) {
+ array_type_t *const array_type = &type->array;
+ type_t *const element_type = skip_typeref(array_type->element_type);
+
+ if (element_type->kind == TYPE_ATOMIC) {
+ switch (expression->kind) {
+ case EXPR_STRING_LITERAL:
+ if (element_type->atomic.atype == ATOMIC_TYPE_CHAR) {
+ return initializer_from_string(array_type,
+ expression->string.value);
+ }
- /* TODO handle wide strings */
- if(atype == ATOMIC_TYPE_CHAR
- || atype == ATOMIC_TYPE_SCHAR
- || atype == ATOMIC_TYPE_UCHAR) {
+ case EXPR_WIDE_STRING_LITERAL: {
+ type_t *bare_wchar_type = skip_typeref(type_wchar_t);
+ if (get_unqualified_type(element_type) == bare_wchar_type) {
+ return initializer_from_wide_string(array_type,
+ &expression->wide_string.value);
+ }
+ }
- string_literal_expression_t *literal = &expression->string;
- return initializer_from_string(array_type, literal->value);
+ default:
+ break;
}
}
}
- semantic_assign(type, &expression, "initializer");
+ type_t *expression_type = skip_typeref(expression->base.datatype);
+ if(is_type_scalar(type) || types_compatible(type, expression_type)) {
+ semantic_assign(type, &expression, "initializer");
- initializer_t *result = allocate_initializer(INITIALIZER_VALUE);
- result->value.value = expression;
+ initializer_t *result = allocate_initializer_zero(INITIALIZER_VALUE);
+ result->value.value = expression;
- return result;
+ return result;
+ }
+
+ return NULL;
}
static initializer_t *parse_sub_initializer(type_t *type,
static bool had_initializer_brace_warning;
+static void skip_designator(void)
+{
+ while(1) {
+ if(token.type == '.') {
+ next_token();
+ if(token.type == T_IDENTIFIER)
+ next_token();
+ } else if(token.type == '[') {
+ next_token();
+ parse_constant_expression();
+ if(token.type == ']')
+ next_token();
+ } else {
+ break;
+ }
+ }
+}
+
static initializer_t *parse_sub_initializer(type_t *type,
expression_t *expression,
type_t *expression_type)
if(token.type == '{') {
next_token();
if(!had_initializer_brace_warning) {
- parse_warning("braces around scalar initializer");
+ warningf(HERE, "braces around scalar initializer");
had_initializer_brace_warning = true;
}
initializer_t *result = parse_sub_initializer(type, NULL, NULL);
return initializer_from_expression(type, expression);
}
- /* TODO: ignore qualifiers, comparing pointers is probably
- * not correct */
- if(expression != NULL && expression_type == type) {
- initializer_t *result = allocate_initializer(INITIALIZER_VALUE);
-
- if(type != NULL) {
- semantic_assign(type, &expression, "initializer");
- }
- result->value.value = expression;
-
- return result;
+ /* does the expression match the currently looked at object to initialize */
+ if(expression != NULL) {
+ initializer_t *result = initializer_from_expression(type, expression);
+ if(result != NULL)
+ return result;
}
bool read_paren = false;
/* descend into subtype */
initializer_t *result = NULL;
initializer_t **elems;
- if(type->type == TYPE_ARRAY) {
+ if(is_type_array(type)) {
array_type_t *array_type = &type->array;
type_t *element_type = array_type->element_type;
element_type = skip_typeref(element_type);
+ if(token.type == '.') {
+ errorf(HERE,
+ "compound designator in initializer for array type '%T'",
+ type);
+ skip_designator();
+ }
+
initializer_t *sub;
had_initializer_brace_warning = false;
if(expression == NULL) {
if(token.type == '}')
break;
- sub = parse_sub_initializer(element_type, NULL, NULL);
+ sub = parse_sub_initializer_elem(element_type);
if(sub == NULL) {
/* TODO error, do nicer cleanup */
- parse_error("member initializer didn't match");
+ errorf(HERE, "member initializer didn't match");
DEL_ARR_F(elems);
return NULL;
}
ARR_APP1(initializer_t*, elems, sub);
}
} else {
- assert(type->type == TYPE_COMPOUND_STRUCT
- || type->type == TYPE_COMPOUND_UNION);
+ assert(is_type_compound(type));
compound_type_t *compound_type = &type->compound;
- context_t *context = & compound_type->declaration->context;
+ context_t *context = &compound_type->declaration->context;
+
+ if(token.type == '[') {
+ errorf(HERE,
+ "array designator in initializer for compound type '%T'",
+ type);
+ skip_designator();
+ }
declaration_t *first = context->declarations;
if(first == NULL)
type_t *iter_type = iter->type;
iter_type = skip_typeref(iter_type);
- sub = parse_sub_initializer(iter_type, NULL, NULL);
+ sub = parse_sub_initializer_elem(iter_type);
if(sub == NULL) {
- /* TODO error, do nicer cleanup*/
- parse_error("member initializer didn't match");
+ /* TODO error, do nicer cleanup */
+ errorf(HERE, "member initializer didn't match");
DEL_ARR_F(elems);
return NULL;
}
initializer_list_t *init = allocate_ast_zero(sizeof(init[0]) + elems_size);
- init->initializer.type = INITIALIZER_LIST;
+ init->initializer.kind = INITIALIZER_LIST;
init->len = len;
memcpy(init->initializers, elems, elems_size);
DEL_ARR_F(elems);
type = skip_typeref(type);
if(token.type != '{') {
- expression_t *expression = parse_assignment_expression();
- return initializer_from_expression(type, expression);
+ expression_t *expression = parse_assignment_expression();
+ initializer_t *initializer = initializer_from_expression(type, expression);
+ if(initializer == NULL) {
+ errorf(HERE, "initializer expression '%E', type '%T' is incompatible with type '%T'", expression, expression->base.datatype, type);
+ }
+ return initializer;
}
if(is_type_scalar(type)) {
if(token.type == '{') {
if(declaration->init.is_defined) {
assert(symbol != NULL);
- parser_print_error_prefix();
- fprintf(stderr, "multiple definition of %s %s\n",
- is_struct ? "struct" : "union", symbol->string);
+ errorf(HERE, "multiple definition of %s %Y",
+ is_struct ? "struct" : "union", symbol);
declaration->context.declarations = NULL;
}
declaration->init.is_defined = true;
int top = environment_top();
context_t *last_context = context;
- set_context(& declaration->context);
+ set_context(&declaration->context);
parse_compound_type_entries();
parse_attributes();
- assert(context == & declaration->context);
+ assert(context == &declaration->context);
set_context(last_context);
environment_pop_to(top);
}
if(token.type == '}') {
next_token();
- parse_error("empty enum not allowed");
+ errorf(HERE, "empty enum not allowed");
return;
}
if(token.type == '{') {
if(declaration->init.is_defined) {
- parser_print_error_prefix();
- fprintf(stderr, "multiple definitions of enum %s\n",
- symbol->string);
+ errorf(HERE, "multiple definitions of enum %Y", symbol);
}
record_declaration(declaration);
declaration->init.is_defined = 1;
#endif
} specifiers_t;
-static type_t *create_builtin_type(symbol_t *symbol)
+static type_t *create_builtin_type(symbol_t *const symbol,
+ type_t *const real_type)
{
type_t *type = allocate_type_zero(TYPE_BUILTIN);
type->builtin.symbol = symbol;
- /* TODO... */
- type->builtin.real_type = type_int;
+ type->builtin.real_type = real_type;
- return type;
+ type_t *result = typehash_insert(type);
+ if (type != result) {
+ free_type(type);
+ }
+
+ return result;
}
static type_t *get_typedef_type(symbol_t *symbol)
unsigned type_specifiers = 0;
int newtype = 0;
+ specifiers->source_position = token.source_position;
+
while(true) {
switch(token.type) {
#define MATCH_STORAGE_CLASS(token, class) \
case token: \
if(specifiers->storage_class != STORAGE_CLASS_NONE) { \
- parse_error("multiple storage classes in declaration " \
- "specifiers"); \
+ errorf(HERE, "multiple storage classes in declaration specifiers"); \
} \
specifiers->storage_class = class; \
next_token(); \
break;
default:
- parse_error("multiple storage classes in declaration specifiers");
+ errorf(HERE, "multiple storage classes in declaration specifiers");
break;
}
next_token();
case token: \
next_token(); \
if(type_specifiers & specifier) { \
- parse_error("multiple " name " type specifiers given"); \
+ errorf(HERE, "multiple " name " type specifiers given"); \
} else { \
type_specifiers |= specifier; \
} \
MATCH_SPECIFIER(T__Complex, SPECIFIER_COMPLEX, "_Complex")
MATCH_SPECIFIER(T__Imaginary, SPECIFIER_IMAGINARY, "_Imaginary")
#endif
+ case T_forceinline:
+ /* only in microsoft mode */
+ specifiers->decl_modifiers |= DM_FORCEINLINE;
+
case T_inline:
next_token();
specifiers->is_inline = true;
case T_long:
next_token();
if(type_specifiers & SPECIFIER_LONG_LONG) {
- parse_error("multiple type specifiers given");
+ errorf(HERE, "multiple type specifiers given");
} else if(type_specifiers & SPECIFIER_LONG) {
type_specifiers |= SPECIFIER_LONG_LONG;
} else {
type = parse_typeof();
break;
case T___builtin_va_list:
- type = create_builtin_type(token.v.symbol);
+ type = duplicate_type(type_valist);
next_token();
break;
default:
/* invalid specifier combination, give an error message */
if(type_specifiers == 0) {
-#ifndef STRICT_C99
- parse_warning("no type specifiers in declaration (using int)");
- atomic_type = ATOMIC_TYPE_INT;
- break;
-#else
- parse_error("no type specifiers given in declaration");
-#endif
+ if (! strict_mode) {
+ warningf(HERE, "no type specifiers in declaration, using int");
+ atomic_type = ATOMIC_TYPE_INT;
+ break;
+ } else {
+ errorf(HERE, "no type specifiers given in declaration");
+ }
} else if((type_specifiers & SPECIFIER_SIGNED) &&
(type_specifiers & SPECIFIER_UNSIGNED)) {
- parse_error("signed and unsigned specifiers gives");
+ errorf(HERE, "signed and unsigned specifiers gives");
} else if(type_specifiers & (SPECIFIER_SIGNED | SPECIFIER_UNSIGNED)) {
- parse_error("only integer types can be signed or unsigned");
+ errorf(HERE, "only integer types can be signed or unsigned");
} else {
- parse_error("multiple datatypes in declaration");
+ errorf(HERE, "multiple datatypes in declaration");
}
atomic_type = ATOMIC_TYPE_INVALID;
}
newtype = 1;
} else {
if(type_specifiers != 0) {
- parse_error("multiple datatypes in declaration");
+ errorf(HERE, "multiple datatypes in declaration");
}
}
}
}
-static void parse_identifier_list(void)
+static declaration_t *parse_identifier_list(void)
{
- while(true) {
- if(token.type != T_IDENTIFIER) {
- parse_error_expected("while parsing parameter identifier list",
- T_IDENTIFIER, 0);
- return;
- }
+ declaration_t *declarations = NULL;
+ declaration_t *last_declaration = NULL;
+ do {
declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
- declaration->symbol = token.v.symbol;
+ declaration->source_position = token.source_position;
+ declaration->symbol = token.v.symbol;
next_token();
+ if(last_declaration != NULL) {
+ last_declaration->next = declaration;
+ } else {
+ declarations = declaration;
+ }
+ last_declaration = declaration;
+
if(token.type != ',')
break;
next_token();
+ } while(token.type == T_IDENTIFIER);
+
+ return declarations;
+}
+
+static void semantic_parameter(declaration_t *declaration)
+{
+ /* TODO: improve error messages */
+
+ if(declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
+ errorf(HERE, "typedef not allowed in parameter list");
+ } else if(declaration->storage_class != STORAGE_CLASS_NONE
+ && declaration->storage_class != STORAGE_CLASS_REGISTER) {
+ errorf(HERE, "parameter may only have none or register storage class");
+ }
+
+ type_t *orig_type = declaration->type;
+ if(orig_type == NULL)
+ return;
+ type_t *type = skip_typeref(orig_type);
+
+ /* Array as last part of a parameter type is just syntactic sugar. Turn it
+ * into a pointer. § 6.7.5.3 (7) */
+ if (is_type_array(type)) {
+ const array_type_t *arr_type = &type->array;
+ type_t *element_type = arr_type->element_type;
+
+ type = make_pointer_type(element_type, type->base.qualifiers);
+
+ declaration->type = type;
+ }
+
+ if(is_type_incomplete(type)) {
+ errorf(HERE, "incomplete type ('%T') not allowed for parameter '%Y'",
+ orig_type, declaration->symbol);
}
}
parse_declaration_specifiers(&specifiers);
- declaration_t *declaration
- = parse_declarator(&specifiers, specifiers.type, true);
-
- /* TODO check declaration constraints for parameters */
- if(declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
- parse_error("typedef not allowed in parameter list");
- }
+ declaration_t *declaration = parse_declarator(&specifiers, /*may_be_abstract=*/true);
- /* Array as last part of a paramter type is just syntactic sugar. Turn it
- * into a pointer */
- if (declaration->type->type == TYPE_ARRAY) {
- const array_type_t *const arr_type = &declaration->type->array;
- type_t *element_type = arr_type->element_type;
- declaration->type = make_pointer_type(element_type, TYPE_QUALIFIER_NONE);
- }
+ semantic_parameter(declaration);
return declaration;
}
static declaration_t *parse_parameters(function_type_t *type)
{
if(token.type == T_IDENTIFIER) {
- symbol_t *symbol = token.v.symbol;
+ symbol_t *symbol = token.v.symbol;
if(!is_typedef_symbol(symbol)) {
- /* TODO: K&R style C parameters */
- parse_identifier_list();
- return NULL;
+ type->kr_style_parameters = true;
+ return parse_identifier_list();
}
}
switch(token.type) {
case T_IDENTIFIER:
if(declaration == NULL) {
- parse_error("no identifier expected in typename");
+ errorf(HERE, "no identifier expected in typename");
} else {
declaration->symbol = token.v.symbol;
declaration->source_position = token.source_position;
type_t *function_type = construct_function_type->function_type;
- function_type->function.result_type = type;
+ function_type->function.return_type = type;
type = function_type;
break;
}
static declaration_t *parse_declarator(
- const declaration_specifiers_t *specifiers,
- type_t *type, bool may_be_abstract)
+ const declaration_specifiers_t *specifiers, bool may_be_abstract)
{
- declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
- declaration->storage_class = specifiers->storage_class;
- declaration->is_inline = specifiers->is_inline;
+ type_t *type = specifiers->type;
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+ declaration->storage_class = specifiers->storage_class;
+ declaration->modifiers = specifiers->decl_modifiers;
+ declaration->is_inline = specifiers->is_inline;
construct_type_t *construct_type
= parse_inner_declarator(declaration, may_be_abstract);
static declaration_t *record_declaration(declaration_t *declaration)
{
+ assert(declaration->parent_context == NULL);
assert(context != NULL);
symbol_t *symbol = declaration->symbol;
return declaration;
}
-static void parser_error_multiple_definition(declaration_t *previous,
- declaration_t *declaration)
+static void parser_error_multiple_definition(declaration_t *declaration,
+ const source_position_t source_position)
{
- parser_print_error_prefix_pos(declaration->source_position);
- fprintf(stderr, "multiple definition of symbol '%s'\n",
- declaration->symbol->string);
- parser_print_error_prefix_pos(previous->source_position);
- fprintf(stderr, "this is the location of the previous definition.\n");
+ errorf(source_position, "multiple definition of symbol '%Y'",
+ declaration->symbol);
+ errorf(declaration->source_position,
+ "this is the location of the previous definition.");
}
-static void parse_init_declarators(const declaration_specifiers_t *specifiers)
+static bool is_declaration_specifier(const token_t *token,
+ bool only_type_specifiers)
{
- while(true) {
- declaration_t *ndeclaration
- = parse_declarator(specifiers, specifiers->type, false);
-
- declaration_t *declaration = record_declaration(ndeclaration);
+ switch(token->type) {
+ TYPE_SPECIFIERS
+ return true;
+ case T_IDENTIFIER:
+ return is_typedef_symbol(token->v.symbol);
- type_t *orig_type = declaration->type;
- type_t *type = skip_typeref(orig_type);
- if(type->type != TYPE_FUNCTION && declaration->is_inline) {
- parser_print_warning_prefix_pos(declaration->source_position);
- fprintf(stderr, "variable '%s' declared 'inline'\n",
- declaration->symbol->string);
- }
+ case T___extension__:
+ STORAGE_CLASSES
+ TYPE_QUALIFIERS
+ return !only_type_specifiers;
- if(token.type == '=') {
- next_token();
+ default:
+ return false;
+ }
+}
- /* TODO: check that this is an allowed type (no function type) */
+static void parse_init_declarator_rest(declaration_t *declaration)
+{
+ eat('=');
- if(declaration->init.initializer != NULL) {
- parser_error_multiple_definition(declaration, ndeclaration);
- }
+ type_t *orig_type = declaration->type;
+ type_t *type = NULL;
+ if(orig_type != NULL)
+ type = skip_typeref(orig_type);
- initializer_t *initializer = parse_initializer(type);
+ if(declaration->init.initializer != NULL) {
+ parser_error_multiple_definition(declaration, token.source_position);
+ }
- if(type->type == TYPE_ARRAY && initializer != NULL) {
- array_type_t *array_type = &type->array;
+ initializer_t *initializer = parse_initializer(type);
- if(array_type->size == NULL) {
- expression_t *cnst = allocate_expression_zero(EXPR_CONST);
+ /* § 6.7.5 (22) array initializers for arrays with unknown size determine
+ * the array type size */
+ if(type != NULL && is_type_array(type) && initializer != NULL) {
+ array_type_t *array_type = &type->array;
- cnst->base.datatype = type_size_t;
+ if(array_type->size == NULL) {
+ expression_t *cnst = allocate_expression_zero(EXPR_CONST);
- if(initializer->type == INITIALIZER_LIST) {
- initializer_list_t *list = &initializer->list;
- cnst->conste.v.int_value = list->len;
- } else {
- assert(initializer->type == INITIALIZER_STRING);
- initializer_string_t *string = &initializer->string;
- cnst->conste.v.int_value = strlen(string->string) + 1;
- }
+ cnst->base.datatype = type_size_t;
- array_type->size = cnst;
+ switch (initializer->kind) {
+ case INITIALIZER_LIST: {
+ initializer_list_t *const list = &initializer->list;
+ cnst->conste.v.int_value = list->len;
+ break;
}
- }
+ case INITIALIZER_STRING: {
+ initializer_string_t *const string = &initializer->string;
+ cnst->conste.v.int_value = strlen(string->string) + 1;
+ break;
+ }
- ndeclaration->init.initializer = initializer;
- } else if(token.type == '{') {
- if(type->type != TYPE_FUNCTION) {
- parser_print_error_prefix();
- fprintf(stderr, "declarator '");
- print_type_ext(orig_type, declaration->symbol, NULL);
- fprintf(stderr, "' has a body but is not a function type.\n");
- eat_block();
- continue;
- }
- function_type_t *function_type = &type->function;
- /* § 6.7.5.3 (14) a function definition with () means no
- * parameters */
- if(function_type->unspecified_parameters) {
- type_t *duplicate = duplicate_type(type);
- duplicate->function.unspecified_parameters = false;
-
- type = typehash_insert(duplicate);
- if(type != duplicate) {
- //obstack_free(type_obst, duplicate);
+ case INITIALIZER_WIDE_STRING: {
+ initializer_wide_string_t *const string = &initializer->wide_string;
+ cnst->conste.v.int_value = string->string.size;
+ break;
}
- function_type = &type->function;
- }
- if(declaration->init.statement != NULL) {
- parser_error_multiple_definition(declaration, ndeclaration);
- }
- if(ndeclaration != declaration) {
- memcpy(&declaration->context, &ndeclaration->context,
- sizeof(declaration->context));
+ default:
+ panic("invalid initializer type");
}
- int top = environment_top();
- context_t *last_context = context;
- set_context(&declaration->context);
+ array_type->size = cnst;
+ }
+ }
+
+ if(type != NULL && is_type_function(type)) {
+ errorf(declaration->source_position,
+ "initializers not allowed for function types at declator '%Y' (type '%T')",
+ declaration->symbol, orig_type);
+ } else {
+ declaration->init.initializer = initializer;
+ }
+}
+
+/* parse rest of a declaration without any declarator */
+static void parse_anonymous_declaration_rest(
+ const declaration_specifiers_t *specifiers,
+ parsed_declaration_func finished_declaration)
+{
+ eat(';');
+
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+
+ declaration->type = specifiers->type;
+ declaration->storage_class = specifiers->storage_class;
+ declaration->source_position = specifiers->source_position;
+
+ if (declaration->storage_class != STORAGE_CLASS_NONE) {
+ warningf(declaration->source_position, "useless storage class in empty declaration");
+ }
- /* push function parameters */
- declaration_t *parameter = declaration->context.declarations;
- for( ; parameter != NULL; parameter = parameter->next) {
- environment_push(parameter);
+ type_t *type = declaration->type;
+ switch (type->kind) {
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: {
+ const compound_type_t *compound_type = &type->compound;
+ if (compound_type->declaration->symbol == NULL) {
+ warningf(declaration->source_position, "unnamed struct/union that defines no instances");
}
+ break;
+ }
- int label_stack_top = label_top();
- declaration_t *old_current_function = current_function;
- current_function = declaration;
+ case TYPE_ENUM:
+ break;
- statement_t *statement = parse_compound_statement();
+ default:
+ warningf(declaration->source_position, "empty declaration");
+ break;
+ }
- assert(current_function == declaration);
- current_function = old_current_function;
- label_pop_to(label_stack_top);
+ finished_declaration(declaration);
+}
- assert(context == &declaration->context);
- set_context(last_context);
- environment_pop_to(top);
+static void parse_declaration_rest(declaration_t *ndeclaration,
+ const declaration_specifiers_t *specifiers,
+ parsed_declaration_func finished_declaration)
+{
+ while(true) {
+ declaration_t *declaration = finished_declaration(ndeclaration);
- declaration->init.statement = statement;
- return;
+ type_t *orig_type = declaration->type;
+ type_t *type = skip_typeref(orig_type);
+
+ if(type->kind != TYPE_FUNCTION && declaration->is_inline) {
+ warningf(declaration->source_position,
+ "variable '%Y' declared 'inline'\n", declaration->symbol);
+ }
+
+ if(token.type == '=') {
+ parse_init_declarator_rest(declaration);
}
if(token.type != ',')
break;
- next_token();
+ eat(',');
+
+ ndeclaration = parse_declarator(specifiers, /*may_be_abstract=*/false);
}
expect_void(';');
}
+static declaration_t *finished_kr_declaration(declaration_t *declaration)
+{
+ /* TODO: check that it was actually a parameter that gets a type */
+
+ /* we should have a declaration for the parameter in the current
+ * scope */
+ return record_declaration(declaration);
+}
+
+static void parse_declaration(parsed_declaration_func finished_declaration)
+{
+ declaration_specifiers_t specifiers;
+ memset(&specifiers, 0, sizeof(specifiers));
+ parse_declaration_specifiers(&specifiers);
+
+ if(token.type == ';') {
+ parse_anonymous_declaration_rest(&specifiers, finished_declaration);
+ } else {
+ declaration_t *declaration = parse_declarator(&specifiers, /*may_be_abstract=*/false);
+ parse_declaration_rest(declaration, &specifiers, finished_declaration);
+ }
+}
+
+static void parse_kr_declaration_list(declaration_t *declaration)
+{
+ type_t *type = skip_typeref(declaration->type);
+ if(!is_type_function(type))
+ return;
+
+ if(!type->function.kr_style_parameters)
+ return;
+
+ /* push function parameters */
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&declaration->context);
+
+ declaration_t *parameter = declaration->context.declarations;
+ for( ; parameter != NULL; parameter = parameter->next) {
+ environment_push(parameter);
+ }
+
+ /* parse declaration list */
+ while(is_declaration_specifier(&token, false)) {
+ parse_declaration(finished_kr_declaration);
+ }
+
+ /* pop function parameters */
+ assert(context == &declaration->context);
+ set_context(last_context);
+ environment_pop_to(top);
+
+ /* update function type */
+ type_t *new_type = duplicate_type(type);
+ new_type->function.kr_style_parameters = false;
+
+ function_parameter_t *parameters = NULL;
+ function_parameter_t *last_parameter = NULL;
+
+ declaration_t *parameter_declaration = declaration->context.declarations;
+ for( ; parameter_declaration != NULL;
+ parameter_declaration = parameter_declaration->next) {
+ type_t *parameter_type = parameter_declaration->type;
+ if(parameter_type == NULL) {
+ if (strict_mode) {
+ errorf(HERE, "no type specified for function parameter '%Y'",
+ parameter_declaration->symbol);
+ } else {
+ warningf(HERE, "no type specified for function parameter '%Y', using int",
+ parameter_declaration->symbol);
+ parameter_type = type_int;
+ parameter_declaration->type = parameter_type;
+ }
+ }
+
+ semantic_parameter(parameter_declaration);
+ parameter_type = parameter_declaration->type;
+
+ function_parameter_t *function_parameter
+ = obstack_alloc(type_obst, sizeof(function_parameter[0]));
+ memset(function_parameter, 0, sizeof(function_parameter[0]));
+
+ function_parameter->type = parameter_type;
+ if(last_parameter != NULL) {
+ last_parameter->next = function_parameter;
+ } else {
+ parameters = function_parameter;
+ }
+ last_parameter = function_parameter;
+ }
+ new_type->function.parameters = parameters;
+
+ type = typehash_insert(new_type);
+ if(type != new_type) {
+ obstack_free(type_obst, new_type);
+ }
+
+ declaration->type = type;
+}
+
+static void parse_external_declaration(void)
+{
+ /* function-definitions and declarations both start with declaration
+ * specifiers */
+ declaration_specifiers_t specifiers;
+ memset(&specifiers, 0, sizeof(specifiers));
+ parse_declaration_specifiers(&specifiers);
+
+ /* must be a declaration */
+ if(token.type == ';') {
+ parse_anonymous_declaration_rest(&specifiers, record_declaration);
+ return;
+ }
+
+ /* declarator is common to both function-definitions and declarations */
+ declaration_t *ndeclaration = parse_declarator(&specifiers, /*may_be_abstract=*/false);
+
+ /* must be a declaration */
+ if(token.type == ',' || token.type == '=' || token.type == ';') {
+ parse_declaration_rest(ndeclaration, &specifiers, record_declaration);
+ return;
+ }
+
+ /* must be a function definition */
+ parse_kr_declaration_list(ndeclaration);
+
+ if(token.type != '{') {
+ parse_error_expected("while parsing function definition", '{', 0);
+ eat_statement();
+ return;
+ }
+
+ type_t *type = ndeclaration->type;
+ if(type == NULL) {
+ eat_block();
+ return;
+ }
+
+ /* note that we don't skip typerefs: the standard doesn't allow them here
+ * (so we can't use is_type_function here) */
+ if(type->kind != TYPE_FUNCTION) {
+ errorf(HERE, "declarator '%#T' has a body but is not a function type", type, ndeclaration->symbol);
+ eat_block();
+ return;
+ }
+
+ /* § 6.7.5.3 (14) a function definition with () means no
+ * parameters (and not unspecified parameters) */
+ if(type->function.unspecified_parameters) {
+ type_t *duplicate = duplicate_type(type);
+ duplicate->function.unspecified_parameters = false;
+
+ type = typehash_insert(duplicate);
+ if(type != duplicate) {
+ obstack_free(type_obst, duplicate);
+ }
+ ndeclaration->type = type;
+ }
+
+ declaration_t *declaration = record_declaration(ndeclaration);
+ if(ndeclaration != declaration) {
+ memcpy(&declaration->context, &ndeclaration->context,
+ sizeof(declaration->context));
+ }
+ type = skip_typeref(declaration->type);
+
+ /* push function parameters and switch context */
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&declaration->context);
+
+ declaration_t *parameter = declaration->context.declarations;
+ for( ; parameter != NULL; parameter = parameter->next) {
+ environment_push(parameter);
+ }
+
+ if(declaration->init.statement != NULL) {
+ parser_error_multiple_definition(declaration, token.source_position);
+ eat_block();
+ goto end_of_parse_external_declaration;
+ } else {
+ /* parse function body */
+ int label_stack_top = label_top();
+ declaration_t *old_current_function = current_function;
+ current_function = declaration;
+
+ declaration->init.statement = parse_compound_statement();
+
+ assert(current_function == declaration);
+ current_function = old_current_function;
+ label_pop_to(label_stack_top);
+ }
+
+end_of_parse_external_declaration:
+ assert(context == &declaration->context);
+ set_context(last_context);
+ environment_pop_to(top);
+}
+
+static type_t *make_bitfield_type(type_t *base, expression_t *size)
+{
+ type_t *type = allocate_type_zero(TYPE_BITFIELD);
+ type->bitfield.base = base;
+ type->bitfield.size = size;
+
+ return type;
+}
+
static void parse_struct_declarators(const declaration_specifiers_t *specifiers)
{
+ /* TODO: check constraints for struct declarations (in specifiers) */
while(1) {
+ declaration_t *declaration;
+
if(token.type == ':') {
next_token();
- parse_constant_expression();
- /* TODO (bitfields) */
- } else {
- declaration_t *declaration
- = parse_declarator(specifiers, specifiers->type, true);
- /* TODO: check constraints for struct declarations */
- /* TODO: check for doubled fields */
+ type_t *base_type = specifiers->type;
+ expression_t *size = parse_constant_expression();
+
+ type_t *type = make_bitfield_type(base_type, size);
+
+ declaration = allocate_ast_zero(sizeof(declaration[0]));
+
+ declaration->namespc = NAMESPACE_NORMAL;
+ declaration->storage_class = STORAGE_CLASS_NONE;
+ declaration->source_position = token.source_position;
+ declaration->modifiers = specifiers->decl_modifiers;
+ declaration->type = type;
+
record_declaration(declaration);
+ } else {
+ declaration = parse_declarator(specifiers,/*may_be_abstract=*/true);
if(token.type == ':') {
next_token();
- parse_constant_expression();
- /* TODO (bitfields) */
+ expression_t *size = parse_constant_expression();
+
+ type_t *type = make_bitfield_type(declaration->type, size);
+ declaration->type = type;
}
}
+ record_declaration(declaration);
if(token.type != ',')
break;
parse_struct_declarators(&specifiers);
}
if(token.type == T_EOF) {
- parse_error("unexpected error while parsing struct");
+ errorf(HERE, "EOF while parsing struct");
}
next_token();
}
-static void parse_declaration(void)
-{
- source_position_t source_position = token.source_position;
-
- declaration_specifiers_t specifiers;
- memset(&specifiers, 0, sizeof(specifiers));
- parse_declaration_specifiers(&specifiers);
-
- if(token.type == ';') {
- if (specifiers.storage_class != STORAGE_CLASS_NONE) {
- parse_warning_pos(source_position,
- "useless keyword in empty declaration");
- }
- switch (specifiers.type->type) {
- case TYPE_COMPOUND_STRUCT:
- case TYPE_COMPOUND_UNION: {
- const compound_type_t *const comp_type
- = &specifiers.type->compound;
- if (comp_type->declaration->symbol == NULL) {
- parse_warning_pos(source_position,
- "unnamed struct/union that defines no instances");
- }
- break;
- }
-
- case TYPE_ENUM: break;
-
- default:
- parse_warning_pos(source_position, "empty declaration");
- break;
- }
-
- next_token();
-
- declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
-
- declaration->type = specifiers.type;
- declaration->storage_class = specifiers.storage_class;
- declaration->source_position = source_position;
- record_declaration(declaration);
- return;
- }
- parse_init_declarators(&specifiers);
-}
-
static type_t *parse_typename(void)
{
declaration_specifiers_t specifiers;
/* TODO: improve error message, user does probably not know what a
* storage class is...
*/
- parse_error("typename may not have a storage class");
+ errorf(HERE, "typename may not have a storage class");
}
type_t *result = parse_abstract_declarator(specifiers.type);
expression_parser_function_t expression_parsers[T_LAST_TOKEN];
-static expression_t *make_invalid_expression(void)
+/**
+ * Creates a new invalid expression.
+ */
+static expression_t *create_invalid_expression(void)
{
expression_t *expression = allocate_expression_zero(EXPR_INVALID);
expression->base.source_position = token.source_position;
static expression_t *expected_expression_error(void)
{
- parser_print_error_prefix();
- fprintf(stderr, "expected expression, got token ");
- print_token(stderr, & token);
- fprintf(stderr, "\n");
+ errorf(HERE, "expected expression, got token '%K'", &token);
next_token();
- return make_invalid_expression();
+ return create_invalid_expression();
}
+/**
+ * Parse a string constant.
+ */
static expression_t *parse_string_const(void)
{
expression_t *cnst = allocate_expression_zero(EXPR_STRING_LITERAL);
return cnst;
}
+/**
+ * Parse a wide string constant.
+ */
+static expression_t *parse_wide_string_const(void)
+{
+ expression_t *const cnst = allocate_expression_zero(EXPR_WIDE_STRING_LITERAL);
+ cnst->base.datatype = type_wchar_t_ptr;
+ cnst->wide_string.value = token.v.wide_string; /* TODO concatenate */
+ next_token();
+ return cnst;
+}
+
+/**
+ * Parse an integer constant.
+ */
static expression_t *parse_int_const(void)
{
expression_t *cnst = allocate_expression_zero(EXPR_CONST);
return cnst;
}
+/**
+ * Parse a float constant.
+ */
static expression_t *parse_float_const(void)
{
expression_t *cnst = allocate_expression_zero(EXPR_CONST);
const source_position_t source_position)
{
type_t *ntype = allocate_type_zero(TYPE_FUNCTION);
- ntype->function.result_type = type_int;
+ ntype->function.return_type = type_int;
ntype->function.unspecified_parameters = true;
type_t *type = typehash_insert(ntype);
return declaration;
}
-static type_t *make_function_1_type(type_t *result_type, type_t *argument_type)
+/**
+ * Creates a return_type (func)(argument_type) function type if not
+ * already exists.
+ *
+ * @param return_type the return type
+ * @param argument_type the argument type
+ */
+static type_t *make_function_1_type(type_t *return_type, type_t *argument_type)
{
function_parameter_t *parameter
= obstack_alloc(type_obst, sizeof(parameter[0]));
parameter->type = argument_type;
type_t *type = allocate_type_zero(TYPE_FUNCTION);
- type->function.result_type = result_type;
+ type->function.return_type = return_type;
type->function.parameters = parameter;
type_t *result = typehash_insert(type);
return result;
}
+/**
+ * Creates a function type for some function like builtins.
+ *
+ * @param symbol the symbol describing the builtin
+ */
static type_t *get_builtin_symbol_type(symbol_t *symbol)
{
switch(symbol->ID) {
case T___builtin_alloca:
return make_function_1_type(type_void_ptr, type_size_t);
- case T___builtin_nanf:
+ case T___builtin_nan:
return make_function_1_type(type_double, type_string);
+ case T___builtin_nanf:
+ return make_function_1_type(type_float, type_string);
+ case T___builtin_nand:
+ return make_function_1_type(type_long_double, type_string);
+ case T___builtin_va_end:
+ return make_function_1_type(type_void, type_valist);
default:
panic("not implemented builtin symbol found");
}
}
/**
- * performs automatic type cast as described in § 6.3.2.1
+ * Performs automatic type cast as described in § 6.3.2.1.
+ *
+ * @param orig_type the original type
*/
-static type_t *automatic_type_conversion(type_t *type)
+static type_t *automatic_type_conversion(type_t *orig_type)
{
- if(type == NULL)
+ if(orig_type == NULL)
return NULL;
- if(type->type == TYPE_ARRAY) {
+ type_t *type = skip_typeref(orig_type);
+ if(is_type_array(type)) {
array_type_t *array_type = &type->array;
type_t *element_type = array_type->element_type;
unsigned qualifiers = array_type->type.qualifiers;
return make_pointer_type(element_type, qualifiers);
}
- if(type->type == TYPE_FUNCTION) {
- return make_pointer_type(type, TYPE_QUALIFIER_NONE);
+ if(is_type_function(type)) {
+ return make_pointer_type(orig_type, TYPE_QUALIFIER_NONE);
}
- return type;
+ return orig_type;
}
/**
if(expression->base.datatype == NULL)
return NULL;
- switch(expression->type) {
+ switch(expression->kind) {
case EXPR_REFERENCE: {
const reference_expression_t *ref = &expression->reference;
return ref->declaration->type;
const select_expression_t *select = &expression->select;
return select->compound_entry->type;
}
- case EXPR_UNARY: {
- const unary_expression_t *unary = &expression->unary;
- if(unary->type == UNEXPR_DEREFERENCE) {
- expression_t *value = unary->value;
- type_t *type = skip_typeref(value->base.datatype);
- pointer_type_t *pointer_type = &type->pointer;
+ case EXPR_UNARY_DEREFERENCE: {
+ expression_t *value = expression->unary.value;
+ type_t *type = skip_typeref(value->base.datatype);
+ pointer_type_t *pointer_type = &type->pointer;
- return pointer_type->points_to;
- }
- break;
+ return pointer_type->points_to;
}
case EXPR_BUILTIN_SYMBOL: {
const builtin_symbol_expression_t *builtin
next_token();
if(declaration == NULL) {
-#ifndef STRICT_C99
- /* an implicitly defined function */
- if(token.type == '(') {
- parser_print_prefix_pos(token.source_position);
- fprintf(stderr, "warning: implicit declaration of function '%s'\n",
- ref->symbol->string);
+ if (! strict_mode && token.type == '(') {
+ /* an implicitly defined function */
+ warningf(HERE, "implicit declaration of function '%Y'",
+ ref->symbol);
declaration = create_implicit_function(ref->symbol,
source_position);
- } else
-#endif
- {
- parser_print_error_prefix();
- fprintf(stderr, "unknown symbol '%s' found.\n", ref->symbol->string);
+ } else {
+ errorf(HERE, "unknown symbol '%Y' found.", ref->symbol);
return expression;
}
}
- type_t *type = declaration->type;
+ type_t *type = declaration->type;
+
/* we always do the auto-type conversions; the & and sizeof parser contains
* code to revert this! */
type = automatic_type_conversion(type);
static expression_t *parse_cast(void)
{
- expression_t *cast = allocate_expression_zero(EXPR_UNARY);
+ expression_t *cast = allocate_expression_zero(EXPR_UNARY_CAST);
- cast->unary.type = UNEXPR_CAST;
cast->base.source_position = token.source_position;
type_t *type = parse_typename();
return NULL;
}
- assert(statement->type == STATEMENT_COMPOUND);
+ assert(statement->kind == STATEMENT_COMPOUND);
compound_statement_t *compound_statement = &statement->compound;
/* find last statement and use it's type */
last_statement = iter;
}
- if(last_statement->type == STATEMENT_EXPRESSION) {
+ if(last_statement->kind == STATEMENT_EXPRESSION) {
const expression_statement_t *expression_statement
= &last_statement->expression;
expression->base.datatype
switch(token.type) {
case '{':
- /* gcc extension: a stement expression */
+ /* gcc extension: a statement expression */
return parse_statement_expression();
TYPE_QUALIFIERS
/* TODO */
if (current_function == NULL) {
- parse_error("'__func__' used outside of a function");
+ errorf(HERE, "'__func__' used outside of a function");
}
string_literal_expression_t *expression
= allocate_ast_zero(sizeof(expression[0]));
- expression->expression.type = EXPR_FUNCTION;
+ expression->expression.kind = EXPR_FUNCTION;
expression->expression.datatype = type_string;
- expression->value = "TODO: FUNCTION";
+ expression->value = current_function->symbol->string;
return (expression_t*) expression;
}
eat(T___PRETTY_FUNCTION__);
/* TODO */
+ if (current_function == NULL) {
+ errorf(HERE, "'__PRETTY_FUNCTION__' used outside of a function");
+ }
+
string_literal_expression_t *expression
= allocate_ast_zero(sizeof(expression[0]));
- expression->expression.type = EXPR_PRETTY_FUNCTION;
+ expression->expression.kind = EXPR_PRETTY_FUNCTION;
expression->expression.datatype = type_string;
- expression->value = "TODO: PRETTY FUNCTION";
+ expression->value = current_function->symbol->string;
return (expression_t*) expression;
}
if(token.type != T_IDENTIFIER) {
parse_error_expected("while parsing member designator",
T_IDENTIFIER, 0);
- eat_brace();
+ eat_paren();
return NULL;
}
result->symbol = token.v.symbol;
if(token.type != T_IDENTIFIER) {
parse_error_expected("while parsing member designator",
T_IDENTIFIER, 0);
- eat_brace();
+ eat_paren();
return NULL;
}
designator_t *designator = allocate_ast_zero(sizeof(result[0]));
designator_t *designator = allocate_ast_zero(sizeof(result[0]));
designator->array_access = parse_expression();
if(designator->array_access == NULL) {
- eat_brace();
+ eat_paren();
return NULL;
}
expect(']');
return expression;
}
+static expression_t *parse_va_start(void)
+{
+ eat(T___builtin_va_start);
+
+ expression_t *expression = allocate_expression_zero(EXPR_VA_START);
+
+ expect('(');
+ expression->va_starte.ap = parse_assignment_expression();
+ expect(',');
+ expression_t *const expr = parse_assignment_expression();
+ if (expr->kind == EXPR_REFERENCE) {
+ declaration_t *const decl = expr->reference.declaration;
+ if (decl->parent_context == ¤t_function->context &&
+ decl->next == NULL) {
+ expression->va_starte.parameter = decl;
+ expect(')');
+ return expression;
+ }
+ }
+ errorf(expr->base.source_position, "second argument of 'va_start' must be last parameter of the current function");
+
+ return create_invalid_expression();
+}
+
static expression_t *parse_va_arg(void)
{
eat(T___builtin_va_arg);
expression_t *expression = allocate_expression_zero(EXPR_VA_ARG);
expect('(');
- expression->va_arge.arg = parse_assignment_expression();
+ expression->va_arge.ap = parse_assignment_expression();
expect(',');
expression->base.datatype = parse_typename();
expect(')');
return expression;
}
+static expression_t *parse_builtin_constant(void)
+{
+ eat(T___builtin_constant_p);
+
+ expression_t *expression = allocate_expression_zero(EXPR_BUILTIN_CONSTANT_P);
+
+ expect('(');
+ expression->builtin_constant.value = parse_assignment_expression();
+ expect(')');
+ expression->base.datatype = type_int;
+
+ return expression;
+}
+
+static expression_t *parse_builtin_prefetch(void)
+{
+ eat(T___builtin_prefetch);
+
+ expression_t *expression = allocate_expression_zero(EXPR_BUILTIN_PREFETCH);
+
+ expect('(');
+ expression->builtin_prefetch.adr = parse_assignment_expression();
+ if (token.type == ',') {
+ next_token();
+ expression->builtin_prefetch.rw = parse_assignment_expression();
+ }
+ if (token.type == ',') {
+ next_token();
+ expression->builtin_prefetch.locality = parse_assignment_expression();
+ }
+ expect(')');
+ expression->base.datatype = type_void;
+
+ return expression;
+}
+
+static expression_t *parse_compare_builtin(void)
+{
+ expression_t *expression;
+
+ switch(token.type) {
+ case T___builtin_isgreater:
+ expression = allocate_expression_zero(EXPR_BINARY_ISGREATER);
+ break;
+ case T___builtin_isgreaterequal:
+ expression = allocate_expression_zero(EXPR_BINARY_ISGREATEREQUAL);
+ break;
+ case T___builtin_isless:
+ expression = allocate_expression_zero(EXPR_BINARY_ISLESS);
+ break;
+ case T___builtin_islessequal:
+ expression = allocate_expression_zero(EXPR_BINARY_ISLESSEQUAL);
+ break;
+ case T___builtin_islessgreater:
+ expression = allocate_expression_zero(EXPR_BINARY_ISLESSGREATER);
+ break;
+ case T___builtin_isunordered:
+ expression = allocate_expression_zero(EXPR_BINARY_ISUNORDERED);
+ break;
+ default:
+ panic("invalid compare builtin found");
+ break;
+ }
+ next_token();
+
+ expect('(');
+ expression->binary.left = parse_assignment_expression();
+ expect(',');
+ expression->binary.right = parse_assignment_expression();
+ expect(')');
+
+ type_t *orig_type_left = expression->binary.left->base.datatype;
+ type_t *orig_type_right = expression->binary.right->base.datatype;
+ if(orig_type_left == NULL || orig_type_right == NULL)
+ return expression;
+
+ type_t *type_left = skip_typeref(orig_type_left);
+ type_t *type_right = skip_typeref(orig_type_right);
+ if(!is_type_floating(type_left) && !is_type_floating(type_right)) {
+ type_error_incompatible("invalid operands in comparison",
+ token.source_position, type_left, type_right);
+ } else {
+ semantic_comparison(&expression->binary);
+ }
+
+ return expression;
+}
+
+static expression_t *parse_builtin_expect(void)
+{
+ eat(T___builtin_expect);
+
+ expression_t *expression
+ = allocate_expression_zero(EXPR_BINARY_BUILTIN_EXPECT);
+
+ expect('(');
+ expression->binary.left = parse_assignment_expression();
+ expect(',');
+ expression->binary.right = parse_constant_expression();
+ expect(')');
+
+ expression->base.datatype = expression->binary.left->base.datatype;
+
+ return expression;
+}
+
+static expression_t *parse_assume(void) {
+ eat(T_assume);
+
+ expression_t *expression
+ = allocate_expression_zero(EXPR_UNARY_ASSUME);
+
+ expect('(');
+ expression->unary.value = parse_assignment_expression();
+ expect(')');
+
+ expression->base.datatype = type_void;
+ return expression;
+}
+
+static expression_t *parse_alignof(void) {
+ eat(T___alignof__);
+
+ expression_t *expression
+ = allocate_expression_zero(EXPR_ALIGNOF);
+
+ expect('(');
+ expression->alignofe.type = parse_typename();
+ expect(')');
+
+ expression->base.datatype = type_size_t;
+ return expression;
+}
+
static expression_t *parse_primary_expression(void)
{
switch(token.type) {
return parse_float_const();
case T_STRING_LITERAL:
return parse_string_const();
+ case T_WIDE_STRING_LITERAL:
+ return parse_wide_string_const();
case T_IDENTIFIER:
return parse_reference();
case T___FUNCTION__:
return parse_pretty_function_keyword();
case T___builtin_offsetof:
return parse_offsetof();
+ case T___builtin_va_start:
+ return parse_va_start();
case T___builtin_va_arg:
return parse_va_arg();
+ case T___builtin_expect:
+ return parse_builtin_expect();
case T___builtin_nanf:
case T___builtin_alloca:
- case T___builtin_expect:
- case T___builtin_va_start:
case T___builtin_va_end:
return parse_builtin_symbol();
+ case T___builtin_isgreater:
+ case T___builtin_isgreaterequal:
+ case T___builtin_isless:
+ case T___builtin_islessequal:
+ case T___builtin_islessgreater:
+ case T___builtin_isunordered:
+ return parse_compare_builtin();
+ case T___builtin_constant_p:
+ return parse_builtin_constant();
+ case T___builtin_prefetch:
+ return parse_builtin_prefetch();
+ case T___alignof__:
+ return parse_alignof();
+ case T_assume:
+ return parse_assume();
case '(':
return parse_brace_expression();
}
- parser_print_error_prefix();
- fprintf(stderr, "unexpected token ");
- print_token(stderr, &token);
- fprintf(stderr, "\n");
+ errorf(HERE, "unexpected token '%K'", &token);
eat_statement();
- return make_invalid_expression();
+ return create_invalid_expression();
}
static expression_t *parse_array_expression(unsigned precedence,
array_access_expression_t *array_access
= allocate_ast_zero(sizeof(array_access[0]));
- array_access->expression.type = EXPR_ARRAY_ACCESS;
+ array_access->expression.kind = EXPR_ARRAY_ACCESS;
type_t *type_left = left->base.datatype;
type_t *type_inside = inside->base.datatype;
- type_t *result_type = NULL;
+ type_t *return_type = NULL;
if(type_left != NULL && type_inside != NULL) {
type_left = skip_typeref(type_left);
if(is_type_pointer(type_left)) {
pointer_type_t *pointer = &type_left->pointer;
- result_type = pointer->points_to;
+ return_type = pointer->points_to;
array_access->array_ref = left;
array_access->index = inside;
} else if(is_type_pointer(type_inside)) {
pointer_type_t *pointer = &type_inside->pointer;
- result_type = pointer->points_to;
+ return_type = pointer->points_to;
array_access->array_ref = inside;
array_access->index = left;
array_access->flipped = true;
} else {
- parser_print_error_prefix();
- fprintf(stderr, "array access on object with non-pointer types ");
- print_type_quoted(type_left);
- fprintf(stderr, ", ");
- print_type_quoted(type_inside);
- fprintf(stderr, "\n");
+ errorf(HERE, "array access on object with non-pointer types '%T', '%T'", type_left, type_inside);
}
} else {
array_access->array_ref = left;
}
next_token();
- result_type = automatic_type_conversion(result_type);
- array_access->expression.datatype = result_type;
+ return_type = automatic_type_conversion(return_type);
+ array_access->expression.datatype = return_type;
return (expression_t*) array_access;
}
-static bool is_declaration_specifier(const token_t *token,
- bool only_type_specifiers)
-{
- switch(token->type) {
- TYPE_SPECIFIERS
- return 1;
- case T_IDENTIFIER:
- return is_typedef_symbol(token->v.symbol);
- STORAGE_CLASSES
- TYPE_QUALIFIERS
- if(only_type_specifiers)
- return 0;
- return 1;
-
- default:
- return 0;
- }
-}
-
static expression_t *parse_sizeof(unsigned precedence)
{
eat(T_sizeof);
sizeof_expression_t *sizeof_expression
= allocate_ast_zero(sizeof(sizeof_expression[0]));
- sizeof_expression->expression.type = EXPR_SIZEOF;
+ sizeof_expression->expression.kind = EXPR_SIZEOF;
sizeof_expression->expression.datatype = type_size_t;
if(token.type == '(' && is_declaration_specifier(look_ahead(1), true)) {
type_t *orig_type = compound->base.datatype;
if(orig_type == NULL)
- return make_invalid_expression();
+ return create_invalid_expression();
type_t *type = skip_typeref(orig_type);
type_t *type_left = type;
if(is_pointer) {
- if(type->type != TYPE_POINTER) {
- parser_print_error_prefix();
- fprintf(stderr, "left hand side of '->' is not a pointer, but ");
- print_type_quoted(orig_type);
- fputc('\n', stderr);
- return make_invalid_expression();
+ if(type->kind != TYPE_POINTER) {
+ errorf(HERE, "left hand side of '->' is not a pointer, but '%T'", orig_type);
+ return create_invalid_expression();
}
pointer_type_t *pointer_type = &type->pointer;
type_left = pointer_type->points_to;
}
type_left = skip_typeref(type_left);
- if(type_left->type != TYPE_COMPOUND_STRUCT
- && type_left->type != TYPE_COMPOUND_UNION) {
- parser_print_error_prefix();
- fprintf(stderr, "request for member '%s' in something not a struct or "
- "union, but ", symbol->string);
- print_type_quoted(type_left);
- fputc('\n', stderr);
- return make_invalid_expression();
+ if(type_left->kind != TYPE_COMPOUND_STRUCT
+ && type_left->kind != TYPE_COMPOUND_UNION) {
+ errorf(HERE, "request for member '%Y' in something not a struct or "
+ "union, but '%T'", symbol, type_left);
+ return create_invalid_expression();
}
compound_type_t *compound_type = &type_left->compound;
declaration_t *declaration = compound_type->declaration;
if(!declaration->init.is_defined) {
- parser_print_error_prefix();
- fprintf(stderr, "request for member '%s' of incomplete type ",
- symbol->string);
- print_type_quoted(type_left);
- fputc('\n', stderr);
- return make_invalid_expression();
+ errorf(HERE, "request for member '%Y' of incomplete type '%T'",
+ symbol, type_left);
+ return create_invalid_expression();
}
declaration_t *iter = declaration->context.declarations;
}
}
if(iter == NULL) {
- parser_print_error_prefix();
- print_type_quoted(type_left);
- fprintf(stderr, " has no member named '%s'\n", symbol->string);
- return make_invalid_expression();
+ errorf(HERE, "'%T' has no member named '%Y'", orig_type, symbol);
+ return create_invalid_expression();
}
/* we always do the auto-type conversions; the & and sizeof parser contains
select->select.compound_entry = iter;
select->base.datatype = expression_type;
+
+ if(expression_type->kind == TYPE_BITFIELD) {
+ expression_t *extract
+ = allocate_expression_zero(EXPR_UNARY_BITFIELD_EXTRACT);
+ extract->unary.value = select;
+ extract->base.datatype = expression_type->bitfield.base;
+
+ return extract;
+ }
+
return select;
}
+/**
+ * Parse a call expression, ie. expression '( ... )'.
+ *
+ * @param expression the function address
+ */
static expression_t *parse_call_expression(unsigned precedence,
expression_t *expression)
{
(void) precedence;
expression_t *result = allocate_expression_zero(EXPR_CALL);
- call_expression_t *call = &result->call;
- call->function = expression;
+ call_expression_t *call = &result->call;
+ call->function = expression;
function_type_t *function_type = NULL;
type_t *orig_type = expression->base.datatype;
type = skip_typeref(pointer_type->points_to);
- if (type->type == TYPE_FUNCTION) {
+ if (is_type_function(type)) {
function_type = &type->function;
- call->expression.datatype = function_type->result_type;
+ call->expression.datatype = function_type->return_type;
}
}
if(function_type == NULL) {
- parser_print_error_prefix();
- fputs("called object '", stderr);
- print_expression(expression);
- fputs("' (type ", stderr);
- print_type_quoted(orig_type);
- fputs(") is not a pointer to a function\n", stderr);
+ errorf(HERE, "called object '%E' (type '%T') is not a pointer to a function", expression, orig_type);
function_type = NULL;
call->expression.datatype = NULL;
}
/* too few parameters */
if(parameter != NULL) {
- parser_print_error_prefix();
- fprintf(stderr, "too few arguments to function '");
- print_expression(expression);
- fprintf(stderr, "'\n");
+ errorf(HERE, "too few arguments to function '%E'", expression);
} else if(argument != NULL) {
/* too many parameters */
if(!function_type->variadic
&& !function_type->unspecified_parameters) {
- parser_print_error_prefix();
- fprintf(stderr, "too many arguments to function '");
- print_expression(expression);
- fprintf(stderr, "'\n");
+ errorf(HERE, "too many arguments to function '%E'", expression);
} else {
/* do default promotion */
for( ; argument != NULL; argument = argument->next) {
type_t *type = argument->expression->base.datatype;
- type = skip_typeref(type);
if(type == NULL)
continue;
+ type = skip_typeref(type);
if(is_type_integer(type)) {
type = promote_integer(type);
} else if(type == type_float) {
argument->expression
= create_implicit_cast(argument->expression, type);
}
+
+ check_format(&result->call);
}
+ } else {
+ check_format(&result->call);
}
}
static type_t *semantic_arithmetic(type_t *type_left, type_t *type_right);
+static bool same_compound_type(const type_t *type1, const type_t *type2)
+{
+ if(!is_type_compound(type1))
+ return false;
+ if(type1->kind != type2->kind)
+ return false;
+
+ const compound_type_t *compound1 = &type1->compound;
+ const compound_type_t *compound2 = &type2->compound;
+
+ return compound1->declaration == compound2->declaration;
+}
+
+/**
+ * Parse a conditional expression, ie. 'expression ? ... : ...'.
+ *
+ * @param expression the conditional expression
+ */
static expression_t *parse_conditional_expression(unsigned precedence,
expression_t *expression)
{
eat('?');
- conditional_expression_t *conditional
- = allocate_ast_zero(sizeof(conditional[0]));
- conditional->expression.type = EXPR_CONDITIONAL;
- conditional->condition = expression;
+ expression_t *result = allocate_expression_zero(EXPR_CONDITIONAL);
+
+ conditional_expression_t *conditional = &result->conditional;
+ conditional->condition = expression;
/* 6.5.15.2 */
- type_t *condition_type_orig = conditional->condition->base.datatype;
+ type_t *condition_type_orig = expression->base.datatype;
if(condition_type_orig != NULL) {
- type_t *condition_type = skip_typeref(condition_type_orig);
+ type_t *condition_type = skip_typeref(condition_type_orig);
if(condition_type != NULL && !is_type_scalar(condition_type)) {
- type_error("expected a scalar type",
+ type_error("expected a scalar type in conditional condition",
expression->base.source_position, condition_type_orig);
}
}
- expression_t *const t_expr = parse_expression();
- conditional->true_expression = t_expr;
+ expression_t *true_expression = parse_expression();
expect(':');
- expression_t *const f_expr = parse_sub_expression(precedence);
- conditional->false_expression = f_expr;
+ expression_t *false_expression = parse_sub_expression(precedence);
+
+ conditional->true_expression = true_expression;
+ conditional->false_expression = false_expression;
- type_t *const true_type = t_expr->base.datatype;
- if(true_type == NULL)
- return (expression_t*) conditional;
- type_t *const false_type = f_expr->base.datatype;
- if(false_type == NULL)
- return (expression_t*) conditional;
+ type_t *orig_true_type = true_expression->base.datatype;
+ type_t *orig_false_type = false_expression->base.datatype;
+ if(orig_true_type == NULL || orig_false_type == NULL)
+ return result;
- type_t *const skipped_true_type = skip_typeref(true_type);
- type_t *const skipped_false_type = skip_typeref(false_type);
+ type_t *true_type = skip_typeref(orig_true_type);
+ type_t *false_type = skip_typeref(orig_false_type);
/* 6.5.15.3 */
- if (skipped_true_type == skipped_false_type) {
- conditional->expression.datatype = skipped_true_type;
- } else if (is_type_arithmetic(skipped_true_type) &&
- is_type_arithmetic(skipped_false_type)) {
- type_t *const result = semantic_arithmetic(skipped_true_type,
- skipped_false_type);
- conditional->true_expression = create_implicit_cast(t_expr, result);
- conditional->false_expression = create_implicit_cast(f_expr, result);
- conditional->expression.datatype = result;
- } else if (skipped_true_type->type == TYPE_POINTER &&
- skipped_false_type->type == TYPE_POINTER &&
- true /* TODO compatible points_to types */) {
- /* TODO */
- } else if(/* (is_null_ptr_const(skipped_true_type) &&
- skipped_false_type->type == TYPE_POINTER)
- || (is_null_ptr_const(skipped_false_type) &&
- skipped_true_type->type == TYPE_POINTER) TODO*/ false) {
- /* TODO */
- } else if(/* 1 is pointer to object type, other is void* */ false) {
- /* TODO */
+ type_t *result_type = NULL;
+ if (is_type_arithmetic(true_type) && is_type_arithmetic(false_type)) {
+ result_type = semantic_arithmetic(true_type, false_type);
+
+ true_expression = create_implicit_cast(true_expression, result_type);
+ false_expression = create_implicit_cast(false_expression, result_type);
+
+ conditional->true_expression = true_expression;
+ conditional->false_expression = false_expression;
+ conditional->expression.datatype = result_type;
+ } else if (same_compound_type(true_type, false_type)
+ || (is_type_atomic(true_type, ATOMIC_TYPE_VOID) &&
+ is_type_atomic(false_type, ATOMIC_TYPE_VOID))) {
+ /* just take 1 of the 2 types */
+ result_type = true_type;
+ } else if (is_type_pointer(true_type) && is_type_pointer(false_type)
+ && pointers_compatible(true_type, false_type)) {
+ /* ok */
+ result_type = true_type;
} else {
+ /* TODO */
type_error_incompatible("while parsing conditional",
expression->base.source_position, true_type,
- skipped_false_type);
+ false_type);
}
- return (expression_t*) conditional;
+ conditional->expression.datatype = result_type;
+ return result;
}
+/**
+ * Parse an extension expression.
+ */
static expression_t *parse_extension(unsigned precedence)
{
eat(T___extension__);
/* TODO enable extensions */
-
- return parse_sub_expression(precedence);
+ expression_t *expression = parse_sub_expression(precedence);
+ /* TODO disable extensions */
+ return expression;
}
static expression_t *parse_builtin_classify_type(const unsigned precedence)
{
eat(T___builtin_classify_type);
- classify_type_expression_t *const classify_type_expr =
- allocate_ast_zero(sizeof(classify_type_expr[0]));
- classify_type_expr->expression.type = EXPR_CLASSIFY_TYPE;
- classify_type_expr->expression.datatype = type_int;
+ expression_t *result = allocate_expression_zero(EXPR_CLASSIFY_TYPE);
+ result->base.datatype = type_int;
expect('(');
- expression_t *const expression = parse_sub_expression(precedence);
+ expression_t *expression = parse_sub_expression(precedence);
expect(')');
- classify_type_expr->type_expression = expression;
+ result->classify_type.type_expression = expression;
- return (expression_t*)classify_type_expr;
+ return result;
}
static void semantic_incdec(unary_expression_t *expression)
return;
type_t *type = skip_typeref(orig_type);
- if(!is_type_arithmetic(type) && type->type != TYPE_POINTER) {
+ if(!is_type_arithmetic(type) && type->kind != TYPE_POINTER) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs an arithmetic or pointer type\n");
+ errorf(HERE, "operation needs an arithmetic or pointer type");
return;
}
type_t *type = skip_typeref(orig_type);
if(!is_type_arithmetic(type)) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs an arithmetic type\n");
+ errorf(HERE, "operation needs an arithmetic type");
return;
}
type_t *type = skip_typeref(orig_type);
if (!is_type_scalar(type)) {
- parse_error("operand of ! must be of scalar type\n");
+ errorf(HERE, "operand of ! must be of scalar type");
return;
}
type_t *type = skip_typeref(orig_type);
if (!is_type_integer(type)) {
- parse_error("operand of ~ must be of integer type\n");
+ errorf(HERE, "operand of ~ must be of integer type");
return;
}
type_t *type = skip_typeref(orig_type);
if(!is_type_pointer(type)) {
- parser_print_error_prefix();
- fputs("Unary '*' needs pointer or arrray type, but type ", stderr);
- print_type_quoted(orig_type);
- fputs(" given.\n", stderr);
+ errorf(HERE, "Unary '*' needs pointer or arrray type, but type '%T' given", orig_type);
return;
}
if(orig_type == NULL)
return;
- if(value->type == EXPR_REFERENCE) {
+ if(value->kind == EXPR_REFERENCE) {
reference_expression_t *reference = (reference_expression_t*) value;
declaration_t *declaration = reference->declaration;
if(declaration != NULL) {
{ \
eat(token_type); \
\
- unary_expression_t *unary_expression \
- = allocate_ast_zero(sizeof(unary_expression[0])); \
- unary_expression->expression.type = EXPR_UNARY; \
- unary_expression->type = unexpression_type; \
- unary_expression->value = parse_sub_expression(precedence); \
+ expression_t *unary_expression \
+ = allocate_expression_zero(unexpression_type); \
+ unary_expression->unary.value = parse_sub_expression(precedence); \
\
- sfunc(unary_expression); \
+ sfunc(&unary_expression->unary); \
\
- return (expression_t*) unary_expression; \
-}
-
-CREATE_UNARY_EXPRESSION_PARSER('-', UNEXPR_NEGATE, semantic_unexpr_arithmetic)
-CREATE_UNARY_EXPRESSION_PARSER('+', UNEXPR_PLUS, semantic_unexpr_arithmetic)
-CREATE_UNARY_EXPRESSION_PARSER('!', UNEXPR_NOT, semantic_unexpr_scalar)
-CREATE_UNARY_EXPRESSION_PARSER('*', UNEXPR_DEREFERENCE, semantic_dereference)
-CREATE_UNARY_EXPRESSION_PARSER('&', UNEXPR_TAKE_ADDRESS, semantic_take_addr)
-CREATE_UNARY_EXPRESSION_PARSER('~', UNEXPR_BITWISE_NEGATE,
+ return unary_expression; \
+}
+
+CREATE_UNARY_EXPRESSION_PARSER('-', EXPR_UNARY_NEGATE,
+ semantic_unexpr_arithmetic)
+CREATE_UNARY_EXPRESSION_PARSER('+', EXPR_UNARY_PLUS,
+ semantic_unexpr_arithmetic)
+CREATE_UNARY_EXPRESSION_PARSER('!', EXPR_UNARY_NOT,
+ semantic_unexpr_scalar)
+CREATE_UNARY_EXPRESSION_PARSER('*', EXPR_UNARY_DEREFERENCE,
+ semantic_dereference)
+CREATE_UNARY_EXPRESSION_PARSER('&', EXPR_UNARY_TAKE_ADDRESS,
+ semantic_take_addr)
+CREATE_UNARY_EXPRESSION_PARSER('~', EXPR_UNARY_BITWISE_NEGATE,
semantic_unexpr_integer)
-CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_PREFIX_INCREMENT,
+CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, EXPR_UNARY_PREFIX_INCREMENT,
semantic_incdec)
-CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_PREFIX_DECREMENT,
+CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, EXPR_UNARY_PREFIX_DECREMENT,
semantic_incdec)
#define CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(token_type, unexpression_type, \
(void) precedence; \
eat(token_type); \
\
- unary_expression_t *unary_expression \
- = allocate_ast_zero(sizeof(unary_expression[0])); \
- unary_expression->expression.type = EXPR_UNARY; \
- unary_expression->type = unexpression_type; \
- unary_expression->value = left; \
+ expression_t *unary_expression \
+ = allocate_expression_zero(unexpression_type); \
+ unary_expression->unary.value = left; \
\
- sfunc(unary_expression); \
+ sfunc(&unary_expression->unary); \
\
- return (expression_t*) unary_expression; \
+ return unary_expression; \
}
-CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_POSTFIX_INCREMENT,
+CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS,
+ EXPR_UNARY_POSTFIX_INCREMENT,
semantic_incdec)
-CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_POSTFIX_DECREMENT,
+CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS,
+ EXPR_UNARY_POSTFIX_DECREMENT,
semantic_incdec)
static type_t *semantic_arithmetic(type_t *type_left, type_t *type_right)
}
}
+/**
+ * Check the semantic restrictions for a binary expression.
+ */
static void semantic_binexpr_arithmetic(binary_expression_t *expression)
{
expression_t *left = expression->left;
if(!is_type_arithmetic(type_left) || !is_type_arithmetic(type_right)) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs arithmetic types\n");
+ errorf(HERE, "operation needs arithmetic types");
return;
}
if(!is_type_integer(type_left) || !is_type_integer(type_right)) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs integer types\n");
+ errorf(HERE, "operation needs integer types");
return;
}
} else if(is_type_pointer(type_right) && is_type_integer(type_left)) {
expression->expression.datatype = type_right;
} else {
- parser_print_error_prefix();
- fprintf(stderr, "invalid operands to binary + (");
- print_type_quoted(orig_type_left);
- fprintf(stderr, ", ");
- print_type_quoted(orig_type_right);
- fprintf(stderr, ")\n");
+ errorf(HERE, "invalid operands to binary + ('%T', '%T')", orig_type_left, orig_type_right);
}
}
expression->right = create_implicit_cast(right, arithmetic_type);
expression->expression.datatype = arithmetic_type;
return;
- } else if(type_left->type == TYPE_POINTER && is_type_integer(type_right)) {
+ } else if(is_type_pointer(type_left) && is_type_integer(type_right)) {
expression->expression.datatype = type_left;
- } else if(type_left->type == TYPE_POINTER &&
- type_right->type == TYPE_POINTER) {
+ } else if(is_type_pointer(type_left) && is_type_pointer(type_right)) {
if(!pointers_compatible(type_left, type_right)) {
- parser_print_error_prefix();
- fprintf(stderr, "pointers to incompatible objects to binary - (");
- print_type_quoted(orig_type_left);
- fprintf(stderr, ", ");
- print_type_quoted(orig_type_right);
- fprintf(stderr, ")\n");
+ errorf(HERE, "pointers to incompatible objects to binary - ('%T', '%T')", orig_type_left, orig_type_right);
} else {
expression->expression.datatype = type_ptrdiff_t;
}
} else {
- parser_print_error_prefix();
- fprintf(stderr, "invalid operands to binary - (");
- print_type_quoted(orig_type_left);
- fprintf(stderr, ", ");
- print_type_quoted(orig_type_right);
- fprintf(stderr, ")\n");
+ errorf(HERE, "invalid operands to binary - ('%T', '%T')", orig_type_left, orig_type_right);
}
}
expression->left = create_implicit_cast(left, arithmetic_type);
expression->right = create_implicit_cast(right, arithmetic_type);
expression->expression.datatype = arithmetic_type;
- } else if (type_left->type == TYPE_POINTER &&
- type_right->type == TYPE_POINTER) {
+ } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
/* TODO check compatibility */
- } else if (type_left->type == TYPE_POINTER) {
+ } else if (is_type_pointer(type_left)) {
expression->right = create_implicit_cast(right, type_left);
- } else if (type_right->type == TYPE_POINTER) {
+ } else if (is_type_pointer(type_right)) {
expression->left = create_implicit_cast(left, type_right);
} else {
type_error_incompatible("invalid operands in comparison",
if(!is_type_arithmetic(type_left) || !is_type_arithmetic(type_right)) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs arithmetic types\n");
+ errorf(HERE, "operation needs arithmetic types");
return;
}
/* combined instructions are tricky. We can't create an implicit cast on
* the left side, because we need the uncasted form for the store.
* The ast2firm pass has to know that left_type must be right_type
- * for the arithmeitc operation and create a cast by itself */
+ * for the arithmetic operation and create a cast by itself */
type_t *arithmetic_type = semantic_arithmetic(type_left, type_right);
expression->right = create_implicit_cast(right, arithmetic_type);
expression->expression.datatype = type_left;
/* combined instructions are tricky. We can't create an implicit cast on
* the left side, because we need the uncasted form for the store.
* The ast2firm pass has to know that left_type must be right_type
- * for the arithmeitc operation and create a cast by itself */
+ * for the arithmetic operation and create a cast by itself */
type_t *const arithmetic_type = semantic_arithmetic(type_left, type_right);
expression->right = create_implicit_cast(right, arithmetic_type);
expression->expression.datatype = type_left;
- } else if (type_left->type == TYPE_POINTER && is_type_integer(type_right)) {
+ } else if (is_type_pointer(type_left) && is_type_integer(type_right)) {
expression->expression.datatype = type_left;
} else {
- parser_print_error_prefix();
- fputs("Incompatible types ", stderr);
- print_type_quoted(orig_type_left);
- fputs(" and ", stderr);
- print_type_quoted(orig_type_right);
- fputs(" in assignment\n", stderr);
+ errorf(HERE, "incompatible types '%T' and '%T' in assignment", orig_type_left, orig_type_right);
return;
}
}
+/**
+ * Check the semantic restrictions of a logical expression.
+ */
static void semantic_logical_op(binary_expression_t *expression)
{
expression_t *left = expression->left;
if (!is_type_scalar(type_left) || !is_type_scalar(type_right)) {
/* TODO: improve error message */
- parser_print_error_prefix();
- fprintf(stderr, "operation needs scalar types\n");
+ errorf(HERE, "operation needs scalar types");
return;
}
expression->expression.datatype = type_int;
}
-static bool has_const_fields(type_t *type)
+/**
+ * Checks if a compound type has constant fields.
+ */
+static bool has_const_fields(const compound_type_t *type)
{
- (void) type;
+ const context_t *context = &type->declaration->context;
+ const declaration_t *declaration = context->declarations;
+
+ for (; declaration != NULL; declaration = declaration->next) {
+ if (declaration->namespc != NAMESPACE_NORMAL)
+ continue;
+
+ const type_t *decl_type = skip_typeref(declaration->type);
+ if (decl_type->base.qualifiers & TYPE_QUALIFIER_CONST)
+ return true;
+ }
/* TODO */
return false;
}
+/**
+ * Check the semantic restrictions of a binary assign expression.
+ */
static void semantic_binexpr_assign(binary_expression_t *expression)
{
expression_t *left = expression->left;
return;
type_t *type_left = revert_automatic_type_conversion(left);
- type_left = skip_typeref(orig_type_left);
+ type_left = skip_typeref(orig_type_left);
/* must be a modifiable lvalue */
- if (type_left->type == TYPE_ARRAY) {
- parser_print_error_prefix();
- fprintf(stderr, "Cannot assign to arrays ('");
- print_expression(left);
- fprintf(stderr, "')\n");
+ if (is_type_array(type_left)) {
+ errorf(HERE, "cannot assign to arrays ('%E')", left);
return;
}
if(type_left->base.qualifiers & TYPE_QUALIFIER_CONST) {
- parser_print_error_prefix();
- fprintf(stderr, "assignment to readonly location '");
- print_expression(left);
- fprintf(stderr, "' (type ");
- print_type_quoted(orig_type_left);
- fprintf(stderr, ")\n");
+ errorf(HERE, "assignment to readonly location '%E' (type '%T')", left,
+ orig_type_left);
return;
}
if(is_type_incomplete(type_left)) {
- parser_print_error_prefix();
- fprintf(stderr, "left-hand side of assignment '");
- print_expression(left);
- fprintf(stderr, "' has incomplete type ");
- print_type_quoted(orig_type_left);
- fprintf(stderr, "\n");
+ errorf(HERE,
+ "left-hand side of assignment '%E' has incomplete type '%T'",
+ left, orig_type_left);
return;
}
- if(is_type_compound(type_left) && has_const_fields(type_left)) {
- parser_print_error_prefix();
- fprintf(stderr, "can't assign to '");
- print_expression(left);
- fprintf(stderr, "' because compound type ");
- print_type_quoted(orig_type_left);
- fprintf(stderr, " has readonly fields\n");
+ if(is_type_compound(type_left) && has_const_fields(&type_left->compound)) {
+ errorf(HERE, "cannot assign to '%E' because compound type '%T' has readonly fields",
+ left, orig_type_left);
return;
}
expression->expression.datatype = expression->right->base.datatype;
}
-#define CREATE_BINEXPR_PARSER(token_type, binexpression_type, sfunc, lr) \
-static expression_t *parse_##binexpression_type(unsigned precedence, \
- expression_t *left) \
-{ \
- eat(token_type); \
- \
- expression_t *right = parse_sub_expression(precedence + lr); \
- \
- binary_expression_t *binexpr \
- = allocate_ast_zero(sizeof(binexpr[0])); \
- binexpr->expression.type = EXPR_BINARY; \
- binexpr->type = binexpression_type; \
- binexpr->left = left; \
- binexpr->right = right; \
- sfunc(binexpr); \
- \
- return (expression_t*) binexpr; \
-}
-
-CREATE_BINEXPR_PARSER(',', BINEXPR_COMMA, semantic_comma, 1)
-CREATE_BINEXPR_PARSER('*', BINEXPR_MUL, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER('/', BINEXPR_DIV, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER('%', BINEXPR_MOD, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER('+', BINEXPR_ADD, semantic_add, 1)
-CREATE_BINEXPR_PARSER('-', BINEXPR_SUB, semantic_sub, 1)
-CREATE_BINEXPR_PARSER('<', BINEXPR_LESS, semantic_comparison, 1)
-CREATE_BINEXPR_PARSER('>', BINEXPR_GREATER, semantic_comparison, 1)
-CREATE_BINEXPR_PARSER('=', BINEXPR_ASSIGN, semantic_binexpr_assign, 0)
-CREATE_BINEXPR_PARSER(T_EQUALEQUAL, BINEXPR_EQUAL, semantic_comparison, 1)
-CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, BINEXPR_NOTEQUAL,
+#define CREATE_BINEXPR_PARSER(token_type, binexpression_type, sfunc, lr) \
+static expression_t *parse_##binexpression_type(unsigned precedence, \
+ expression_t *left) \
+{ \
+ eat(token_type); \
+ \
+ expression_t *right = parse_sub_expression(precedence + lr); \
+ \
+ expression_t *binexpr = allocate_expression_zero(binexpression_type); \
+ binexpr->binary.left = left; \
+ binexpr->binary.right = right; \
+ sfunc(&binexpr->binary); \
+ \
+ return binexpr; \
+}
+
+CREATE_BINEXPR_PARSER(',', EXPR_BINARY_COMMA, semantic_comma, 1)
+CREATE_BINEXPR_PARSER('*', EXPR_BINARY_MUL, semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER('/', EXPR_BINARY_DIV, semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER('%', EXPR_BINARY_MOD, semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER('+', EXPR_BINARY_ADD, semantic_add, 1)
+CREATE_BINEXPR_PARSER('-', EXPR_BINARY_SUB, semantic_sub, 1)
+CREATE_BINEXPR_PARSER('<', EXPR_BINARY_LESS, semantic_comparison, 1)
+CREATE_BINEXPR_PARSER('>', EXPR_BINARY_GREATER, semantic_comparison, 1)
+CREATE_BINEXPR_PARSER('=', EXPR_BINARY_ASSIGN, semantic_binexpr_assign, 0)
+
+CREATE_BINEXPR_PARSER(T_EQUALEQUAL, EXPR_BINARY_EQUAL,
semantic_comparison, 1)
-CREATE_BINEXPR_PARSER(T_LESSEQUAL, BINEXPR_LESSEQUAL, semantic_comparison, 1)
-CREATE_BINEXPR_PARSER(T_GREATEREQUAL, BINEXPR_GREATEREQUAL,
+CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, EXPR_BINARY_NOTEQUAL,
semantic_comparison, 1)
-CREATE_BINEXPR_PARSER('&', BINEXPR_BITWISE_AND, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER('|', BINEXPR_BITWISE_OR, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER('^', BINEXPR_BITWISE_XOR, semantic_binexpr_arithmetic, 1)
-CREATE_BINEXPR_PARSER(T_ANDAND, BINEXPR_LOGICAL_AND, semantic_logical_op, 1)
-CREATE_BINEXPR_PARSER(T_PIPEPIPE, BINEXPR_LOGICAL_OR, semantic_logical_op, 1)
-CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT,
+CREATE_BINEXPR_PARSER(T_LESSEQUAL, EXPR_BINARY_LESSEQUAL,
+ semantic_comparison, 1)
+CREATE_BINEXPR_PARSER(T_GREATEREQUAL, EXPR_BINARY_GREATEREQUAL,
+ semantic_comparison, 1)
+
+CREATE_BINEXPR_PARSER('&', EXPR_BINARY_BITWISE_AND,
+ semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER('|', EXPR_BINARY_BITWISE_OR,
+ semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER('^', EXPR_BINARY_BITWISE_XOR,
+ semantic_binexpr_arithmetic, 1)
+CREATE_BINEXPR_PARSER(T_ANDAND, EXPR_BINARY_LOGICAL_AND,
+ semantic_logical_op, 1)
+CREATE_BINEXPR_PARSER(T_PIPEPIPE, EXPR_BINARY_LOGICAL_OR,
+ semantic_logical_op, 1)
+CREATE_BINEXPR_PARSER(T_LESSLESS, EXPR_BINARY_SHIFTLEFT,
semantic_shift_op, 1)
-CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT,
+CREATE_BINEXPR_PARSER(T_GREATERGREATER, EXPR_BINARY_SHIFTRIGHT,
semantic_shift_op, 1)
-CREATE_BINEXPR_PARSER(T_PLUSEQUAL, BINEXPR_ADD_ASSIGN,
+CREATE_BINEXPR_PARSER(T_PLUSEQUAL, EXPR_BINARY_ADD_ASSIGN,
semantic_arithmetic_addsubb_assign, 0)
-CREATE_BINEXPR_PARSER(T_MINUSEQUAL, BINEXPR_SUB_ASSIGN,
+CREATE_BINEXPR_PARSER(T_MINUSEQUAL, EXPR_BINARY_SUB_ASSIGN,
semantic_arithmetic_addsubb_assign, 0)
-CREATE_BINEXPR_PARSER(T_ASTERISKEQUAL, BINEXPR_MUL_ASSIGN,
+CREATE_BINEXPR_PARSER(T_ASTERISKEQUAL, EXPR_BINARY_MUL_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_SLASHEQUAL, BINEXPR_DIV_ASSIGN,
+CREATE_BINEXPR_PARSER(T_SLASHEQUAL, EXPR_BINARY_DIV_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_PERCENTEQUAL, BINEXPR_MOD_ASSIGN,
+CREATE_BINEXPR_PARSER(T_PERCENTEQUAL, EXPR_BINARY_MOD_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_LESSLESSEQUAL, BINEXPR_SHIFTLEFT_ASSIGN,
+CREATE_BINEXPR_PARSER(T_LESSLESSEQUAL, EXPR_BINARY_SHIFTLEFT_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_GREATERGREATEREQUAL, BINEXPR_SHIFTRIGHT_ASSIGN,
+CREATE_BINEXPR_PARSER(T_GREATERGREATEREQUAL, EXPR_BINARY_SHIFTRIGHT_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_ANDEQUAL, BINEXPR_BITWISE_AND_ASSIGN,
+CREATE_BINEXPR_PARSER(T_ANDEQUAL, EXPR_BINARY_BITWISE_AND_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_PIPEEQUAL, BINEXPR_BITWISE_OR_ASSIGN,
+CREATE_BINEXPR_PARSER(T_PIPEEQUAL, EXPR_BINARY_BITWISE_OR_ASSIGN,
semantic_arithmetic_assign, 0)
-CREATE_BINEXPR_PARSER(T_CARETEQUAL, BINEXPR_BITWISE_XOR_ASSIGN,
+CREATE_BINEXPR_PARSER(T_CARETEQUAL, EXPR_BINARY_BITWISE_XOR_ASSIGN,
semantic_arithmetic_assign, 0)
static expression_t *parse_sub_expression(unsigned precedence)
left = parser->infix_parser(parser->infix_precedence, left);
assert(left != NULL);
- assert(left->type != EXPR_UNKNOWN);
+ assert(left->kind != EXPR_UNKNOWN);
left->base.source_position = source_position;
}
return left;
}
+/**
+ * Parse an expression.
+ */
static expression_t *parse_expression(void)
{
return parse_sub_expression(1);
}
-
-
+/**
+ * Register a parser for a prefix-like operator with given precedence.
+ *
+ * @param parser the parser function
+ * @param token_type the token type of the prefix token
+ * @param precedence the precedence of the operator
+ */
static void register_expression_parser(parse_expression_function parser,
int token_type, unsigned precedence)
{
expression_parser_function_t *entry = &expression_parsers[token_type];
if(entry->parser != NULL) {
- fprintf(stderr, "for token ");
- print_token_type(stderr, (token_type_t) token_type);
- fprintf(stderr, "\n");
+ diagnosticf("for token '%k'\n", (token_type_t)token_type);
panic("trying to register multiple expression parsers for a token");
}
entry->parser = parser;
entry->precedence = precedence;
}
-static void register_expression_infix_parser(
- parse_expression_infix_function parser, int token_type,
- unsigned precedence)
+/**
+ * Register a parser for an infix operator with given precedence.
+ *
+ * @param parser the parser function
+ * @param token_type the token type of the infix operator
+ * @param precedence the precedence of the operator
+ */
+static void register_infix_parser(parse_expression_infix_function parser,
+ int token_type, unsigned precedence)
{
expression_parser_function_t *entry = &expression_parsers[token_type];
if(entry->infix_parser != NULL) {
- fprintf(stderr, "for token ");
- print_token_type(stderr, (token_type_t) token_type);
- fprintf(stderr, "\n");
+ diagnosticf("for token '%k'\n", (token_type_t)token_type);
panic("trying to register multiple infix expression parsers for a "
"token");
}
entry->infix_precedence = precedence;
}
+/**
+ * Initialize the expression parsers.
+ */
static void init_expression_parsers(void)
{
memset(&expression_parsers, 0, sizeof(expression_parsers));
- register_expression_infix_parser(parse_BINEXPR_MUL, '*', 16);
- register_expression_infix_parser(parse_BINEXPR_DIV, '/', 16);
- register_expression_infix_parser(parse_BINEXPR_MOD, '%', 16);
- register_expression_infix_parser(parse_BINEXPR_SHIFTLEFT, T_LESSLESS, 16);
- register_expression_infix_parser(parse_BINEXPR_SHIFTRIGHT,
- T_GREATERGREATER, 16);
- register_expression_infix_parser(parse_BINEXPR_ADD, '+', 15);
- register_expression_infix_parser(parse_BINEXPR_SUB, '-', 15);
- register_expression_infix_parser(parse_BINEXPR_LESS, '<', 14);
- register_expression_infix_parser(parse_BINEXPR_GREATER, '>', 14);
- register_expression_infix_parser(parse_BINEXPR_LESSEQUAL, T_LESSEQUAL, 14);
- register_expression_infix_parser(parse_BINEXPR_GREATEREQUAL,
- T_GREATEREQUAL, 14);
- register_expression_infix_parser(parse_BINEXPR_EQUAL, T_EQUALEQUAL, 13);
- register_expression_infix_parser(parse_BINEXPR_NOTEQUAL,
- T_EXCLAMATIONMARKEQUAL, 13);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_AND, '&', 12);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_XOR, '^', 11);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_OR, '|', 10);
- register_expression_infix_parser(parse_BINEXPR_LOGICAL_AND, T_ANDAND, 9);
- register_expression_infix_parser(parse_BINEXPR_LOGICAL_OR, T_PIPEPIPE, 8);
- register_expression_infix_parser(parse_conditional_expression, '?', 7);
- register_expression_infix_parser(parse_BINEXPR_ASSIGN, '=', 2);
- register_expression_infix_parser(parse_BINEXPR_ADD_ASSIGN, T_PLUSEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_SUB_ASSIGN, T_MINUSEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_MUL_ASSIGN,
- T_ASTERISKEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_DIV_ASSIGN, T_SLASHEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_MOD_ASSIGN,
- T_PERCENTEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_SHIFTLEFT_ASSIGN,
+ register_infix_parser(parse_array_expression, '[', 30);
+ register_infix_parser(parse_call_expression, '(', 30);
+ register_infix_parser(parse_select_expression, '.', 30);
+ register_infix_parser(parse_select_expression, T_MINUSGREATER, 30);
+ register_infix_parser(parse_EXPR_UNARY_POSTFIX_INCREMENT,
+ T_PLUSPLUS, 30);
+ register_infix_parser(parse_EXPR_UNARY_POSTFIX_DECREMENT,
+ T_MINUSMINUS, 30);
+
+ register_infix_parser(parse_EXPR_BINARY_MUL, '*', 16);
+ register_infix_parser(parse_EXPR_BINARY_DIV, '/', 16);
+ register_infix_parser(parse_EXPR_BINARY_MOD, '%', 16);
+ register_infix_parser(parse_EXPR_BINARY_SHIFTLEFT, T_LESSLESS, 16);
+ register_infix_parser(parse_EXPR_BINARY_SHIFTRIGHT, T_GREATERGREATER, 16);
+ register_infix_parser(parse_EXPR_BINARY_ADD, '+', 15);
+ register_infix_parser(parse_EXPR_BINARY_SUB, '-', 15);
+ register_infix_parser(parse_EXPR_BINARY_LESS, '<', 14);
+ register_infix_parser(parse_EXPR_BINARY_GREATER, '>', 14);
+ register_infix_parser(parse_EXPR_BINARY_LESSEQUAL, T_LESSEQUAL, 14);
+ register_infix_parser(parse_EXPR_BINARY_GREATEREQUAL, T_GREATEREQUAL, 14);
+ register_infix_parser(parse_EXPR_BINARY_EQUAL, T_EQUALEQUAL, 13);
+ register_infix_parser(parse_EXPR_BINARY_NOTEQUAL,
+ T_EXCLAMATIONMARKEQUAL, 13);
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_AND, '&', 12);
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_XOR, '^', 11);
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_OR, '|', 10);
+ register_infix_parser(parse_EXPR_BINARY_LOGICAL_AND, T_ANDAND, 9);
+ register_infix_parser(parse_EXPR_BINARY_LOGICAL_OR, T_PIPEPIPE, 8);
+ register_infix_parser(parse_conditional_expression, '?', 7);
+ register_infix_parser(parse_EXPR_BINARY_ASSIGN, '=', 2);
+ register_infix_parser(parse_EXPR_BINARY_ADD_ASSIGN, T_PLUSEQUAL, 2);
+ register_infix_parser(parse_EXPR_BINARY_SUB_ASSIGN, T_MINUSEQUAL, 2);
+ register_infix_parser(parse_EXPR_BINARY_MUL_ASSIGN, T_ASTERISKEQUAL, 2);
+ register_infix_parser(parse_EXPR_BINARY_DIV_ASSIGN, T_SLASHEQUAL, 2);
+ register_infix_parser(parse_EXPR_BINARY_MOD_ASSIGN, T_PERCENTEQUAL, 2);
+ register_infix_parser(parse_EXPR_BINARY_SHIFTLEFT_ASSIGN,
T_LESSLESSEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_SHIFTRIGHT_ASSIGN,
+ register_infix_parser(parse_EXPR_BINARY_SHIFTRIGHT_ASSIGN,
T_GREATERGREATEREQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_AND_ASSIGN,
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_AND_ASSIGN,
T_ANDEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_OR_ASSIGN,
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_OR_ASSIGN,
T_PIPEEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_BITWISE_XOR_ASSIGN,
+ register_infix_parser(parse_EXPR_BINARY_BITWISE_XOR_ASSIGN,
T_CARETEQUAL, 2);
- register_expression_infix_parser(parse_BINEXPR_COMMA, ',', 1);
-
- register_expression_infix_parser(parse_array_expression, '[', 30);
- register_expression_infix_parser(parse_call_expression, '(', 30);
- register_expression_infix_parser(parse_select_expression, '.', 30);
- register_expression_infix_parser(parse_select_expression,
- T_MINUSGREATER, 30);
- register_expression_infix_parser(parse_UNEXPR_POSTFIX_INCREMENT,
- T_PLUSPLUS, 30);
- register_expression_infix_parser(parse_UNEXPR_POSTFIX_DECREMENT,
- T_MINUSMINUS, 30);
-
- register_expression_parser(parse_UNEXPR_NEGATE, '-', 25);
- register_expression_parser(parse_UNEXPR_PLUS, '+', 25);
- register_expression_parser(parse_UNEXPR_NOT, '!', 25);
- register_expression_parser(parse_UNEXPR_BITWISE_NEGATE, '~', 25);
- register_expression_parser(parse_UNEXPR_DEREFERENCE, '*', 25);
- register_expression_parser(parse_UNEXPR_TAKE_ADDRESS, '&', 25);
- register_expression_parser(parse_UNEXPR_PREFIX_INCREMENT, T_PLUSPLUS, 25);
- register_expression_parser(parse_UNEXPR_PREFIX_DECREMENT, T_MINUSMINUS, 25);
+ register_infix_parser(parse_EXPR_BINARY_COMMA, ',', 1);
+
+ register_expression_parser(parse_EXPR_UNARY_NEGATE, '-', 25);
+ register_expression_parser(parse_EXPR_UNARY_PLUS, '+', 25);
+ register_expression_parser(parse_EXPR_UNARY_NOT, '!', 25);
+ register_expression_parser(parse_EXPR_UNARY_BITWISE_NEGATE, '~', 25);
+ register_expression_parser(parse_EXPR_UNARY_DEREFERENCE, '*', 25);
+ register_expression_parser(parse_EXPR_UNARY_TAKE_ADDRESS, '&', 25);
+ register_expression_parser(parse_EXPR_UNARY_PREFIX_INCREMENT,
+ T_PLUSPLUS, 25);
+ register_expression_parser(parse_EXPR_UNARY_PREFIX_DECREMENT,
+ T_MINUSMINUS, 25);
register_expression_parser(parse_sizeof, T_sizeof, 25);
register_expression_parser(parse_extension, T___extension__, 25);
register_expression_parser(parse_builtin_classify_type,
T___builtin_classify_type, 25);
}
+/**
+ * Parse a asm statement constraints specification.
+ */
static asm_constraint_t *parse_asm_constraints(void)
{
asm_constraint_t *result = NULL;
return result;
}
+/**
+ * Parse a asm statement clobber specification.
+ */
static asm_clobber_t *parse_asm_clobbers(void)
{
asm_clobber_t *result = NULL;
return result;
}
+/**
+ * Parse an asm statement.
+ */
static statement_t *parse_asm_statement(void)
{
eat(T_asm);
return statement;
}
+/**
+ * Parse a case statement.
+ */
static statement_t *parse_case_statement(void)
{
eat(T_case);
- case_label_statement_t *label = allocate_ast_zero(sizeof(label[0]));
- label->statement.type = STATEMENT_CASE_LABEL;
- label->statement.source_position = token.source_position;
- label->expression = parse_expression();
+ statement_t *statement = allocate_statement_zero(STATEMENT_CASE_LABEL);
+
+ statement->base.source_position = token.source_position;
+ statement->case_label.expression = parse_expression();
expect(':');
- label->label_statement = parse_statement();
+ statement->case_label.label_statement = parse_statement();
- return (statement_t*) label;
+ return statement;
}
+/**
+ * Parse a default statement.
+ */
static statement_t *parse_default_statement(void)
{
eat(T_default);
- case_label_statement_t *label = allocate_ast_zero(sizeof(label[0]));
- label->statement.type = STATEMENT_CASE_LABEL;
- label->statement.source_position = token.source_position;
+ statement_t *statement = allocate_statement_zero(STATEMENT_CASE_LABEL);
+
+ statement->base.source_position = token.source_position;
expect(':');
- label->label_statement = parse_statement();
+ statement->label.label_statement = parse_statement();
- return (statement_t*) label;
+ return statement;
}
+/**
+ * Return the declaration for a given label symbol or create a new one.
+ */
static declaration_t *get_label(symbol_t *symbol)
{
declaration_t *candidate = get_declaration(symbol, NAMESPACE_LABEL);
/* otherwise we need to create a new one */
declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
- declaration->namespc = NAMESPACE_LABEL;
+ declaration->namespc = NAMESPACE_LABEL;
declaration->symbol = symbol;
label_push(declaration);
return declaration;
}
+/**
+ * Parse a label statement.
+ */
static statement_t *parse_label_statement(void)
{
assert(token.type == T_IDENTIFIER);
/* if source position is already set then the label is defined twice,
* otherwise it was just mentioned in a goto so far */
if(label->source_position.input_name != NULL) {
- parser_print_error_prefix();
- fprintf(stderr, "duplicate label '%s'\n", symbol->string);
- parser_print_error_prefix_pos(label->source_position);
- fprintf(stderr, "previous definition of '%s' was here\n",
- symbol->string);
+ errorf(HERE, "duplicate label '%Y'\n", symbol);
+ errorf(label->source_position, "previous definition of '%Y' was here\n",
+ symbol);
} else {
label->source_position = token.source_position;
}
label_statement_t *label_statement = allocate_ast_zero(sizeof(label[0]));
- label_statement->statement.type = STATEMENT_LABEL;
+ label_statement->statement.kind = STATEMENT_LABEL;
label_statement->statement.source_position = token.source_position;
label_statement->label = label;
expect(':');
if(token.type == '}') {
- parse_error("label at end of compound statement");
+ /* TODO only warn? */
+ errorf(HERE, "label at end of compound statement");
return (statement_t*) label_statement;
} else {
label_statement->label_statement = parse_statement();
return (statement_t*) label_statement;
}
+/**
+ * Parse an if statement.
+ */
static statement_t *parse_if(void)
{
eat(T_if);
if_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_IF;
+ statement->statement.kind = STATEMENT_IF;
statement->statement.source_position = token.source_position;
expect('(');
return (statement_t*) statement;
}
+/**
+ * Parse a switch statement.
+ */
static statement_t *parse_switch(void)
{
eat(T_switch);
switch_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_SWITCH;
+ statement->statement.kind = STATEMENT_SWITCH;
statement->statement.source_position = token.source_position;
expect('(');
return (statement_t*) statement;
}
+/**
+ * Parse a while statement.
+ */
static statement_t *parse_while(void)
{
eat(T_while);
while_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_WHILE;
+ statement->statement.kind = STATEMENT_WHILE;
statement->statement.source_position = token.source_position;
expect('(');
return (statement_t*) statement;
}
+/**
+ * Parse a do statement.
+ */
static statement_t *parse_do(void)
{
eat(T_do);
do_while_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_DO_WHILE;
+ statement->statement.kind = STATEMENT_DO_WHILE;
statement->statement.source_position = token.source_position;
statement->body = parse_statement();
return (statement_t*) statement;
}
+/**
+ * Parse a for statement.
+ */
static statement_t *parse_for(void)
{
eat(T_for);
for_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_FOR;
+ statement->statement.kind = STATEMENT_FOR;
statement->statement.source_position = token.source_position;
expect('(');
if(token.type != ';') {
if(is_declaration_specifier(&token, false)) {
- parse_declaration();
+ parse_declaration(record_declaration);
} else {
statement->initialisation = parse_expression();
expect(';');
return (statement_t*) statement;
}
+/**
+ * Parse a goto statement.
+ */
static statement_t *parse_goto(void)
{
eat(T_goto);
goto_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_GOTO;
+ statement->statement.kind = STATEMENT_GOTO;
statement->statement.source_position = token.source_position;
statement->label = label;
return (statement_t*) statement;
}
+/**
+ * Parse a continue statement.
+ */
static statement_t *parse_continue(void)
{
eat(T_continue);
expect(';');
statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->type = STATEMENT_CONTINUE;
+ statement->kind = STATEMENT_CONTINUE;
statement->base.source_position = token.source_position;
return statement;
}
+/**
+ * Parse a break statement.
+ */
static statement_t *parse_break(void)
{
eat(T_break);
expect(';');
statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->type = STATEMENT_BREAK;
+ statement->kind = STATEMENT_BREAK;
statement->base.source_position = token.source_position;
return statement;
}
+/**
+ * Parse a return statement.
+ */
static statement_t *parse_return(void)
{
eat(T_return);
return_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_RETURN;
+ statement->statement.kind = STATEMENT_RETURN;
statement->statement.source_position = token.source_position;
- assert(current_function->type->type == TYPE_FUNCTION);
+ assert(is_type_function(current_function->type));
function_type_t *function_type = ¤t_function->type->function;
- type_t *return_type = function_type->result_type;
+ type_t *return_type = function_type->return_type;
expression_t *return_value = NULL;
if(token.type != ';') {
if(return_type == NULL)
return (statement_t*) statement;
+ if(return_value != NULL && return_value->base.datatype == NULL)
+ return (statement_t*) statement;
return_type = skip_typeref(return_type);
if(is_type_atomic(return_type, ATOMIC_TYPE_VOID)
&& !is_type_atomic(return_value_type, ATOMIC_TYPE_VOID)) {
- parse_warning("'return' with a value, in function returning void");
+ warningf(HERE, "'return' with a value, in function returning void");
return_value = NULL;
} else {
if(return_type != NULL) {
}
} else {
if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
- parse_warning("'return' without value, in function returning "
- "non-void");
+ warningf(HERE, "'return' without value, in function returning non-void");
}
}
statement->return_value = return_value;
return (statement_t*) statement;
}
+/**
+ * Parse a declaration statement.
+ */
static statement_t *parse_declaration_statement(void)
{
- declaration_t *before = last_declaration;
-
- declaration_statement_t *statement
- = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_DECLARATION;
- statement->statement.source_position = token.source_position;
+ statement_t *statement = allocate_statement_zero(STATEMENT_DECLARATION);
- declaration_specifiers_t specifiers;
- memset(&specifiers, 0, sizeof(specifiers));
- parse_declaration_specifiers(&specifiers);
+ statement->base.source_position = token.source_position;
- if(token.type == ';') {
- eat(';');
- } else {
- parse_init_declarators(&specifiers);
- }
+ declaration_t *before = last_declaration;
+ parse_declaration(record_declaration);
if(before == NULL) {
- statement->declarations_begin = context->declarations;
+ statement->declaration.declarations_begin = context->declarations;
} else {
- statement->declarations_begin = before->next;
+ statement->declaration.declarations_begin = before->next;
}
- statement->declarations_end = last_declaration;
+ statement->declaration.declarations_end = last_declaration;
- return (statement_t*) statement;
+ return statement;
}
+/**
+ * Parse an expression statement, ie. expr ';'.
+ */
static statement_t *parse_expression_statement(void)
{
- expression_statement_t *statement = allocate_ast_zero(sizeof(statement[0]));
- statement->statement.type = STATEMENT_EXPRESSION;
- statement->statement.source_position = token.source_position;
+ statement_t *statement = allocate_statement_zero(STATEMENT_EXPRESSION);
- statement->expression = parse_expression();
+ statement->base.source_position = token.source_position;
+ statement->expression.expression = parse_expression();
expect(';');
- return (statement_t*) statement;
+ return statement;
}
+/**
+ * Parse a statement.
+ */
static statement_t *parse_statement(void)
{
statement_t *statement = NULL;
return statement;
}
+/**
+ * Parse a compound statement.
+ */
static statement_t *parse_compound_statement(void)
{
compound_statement_t *compound_statement
= allocate_ast_zero(sizeof(compound_statement[0]));
- compound_statement->statement.type = STATEMENT_COMPOUND;
+ compound_statement->statement.kind = STATEMENT_COMPOUND;
compound_statement->statement.source_position = token.source_position;
eat('{');
last_statement = statement;
}
- if(token.type != '}') {
- parser_print_error_prefix_pos(
- compound_statement->statement.source_position);
- fprintf(stderr, "end of file while looking for closing '}'\n");
+ if(token.type == '}') {
+ next_token();
+ } else {
+ errorf(compound_statement->statement.source_position, "end of file while looking for closing '}'");
}
- next_token();
assert(context == &compound_statement->context);
set_context(last_context);
return (statement_t*) compound_statement;
}
+/**
+ * Initialize builtin types.
+ */
+static void initialize_builtin_types(void)
+{
+ type_intmax_t = make_global_typedef("__intmax_t__", type_long_long);
+ type_size_t = make_global_typedef("__SIZE_TYPE__", type_unsigned_long);
+ type_ssize_t = make_global_typedef("__SSIZE_TYPE__", type_long);
+ type_ptrdiff_t = make_global_typedef("__PTRDIFF_TYPE__", type_long);
+ type_uintmax_t = make_global_typedef("__uintmax_t__", type_unsigned_long_long);
+ type_uptrdiff_t = make_global_typedef("__UPTRDIFF_TYPE__", type_unsigned_long);
+ type_wchar_t = make_global_typedef("__WCHAR_TYPE__", type_int);
+ type_wint_t = make_global_typedef("__WINT_TYPE__", type_int);
+
+ type_intmax_t_ptr = make_pointer_type(type_intmax_t, TYPE_QUALIFIER_NONE);
+ type_ptrdiff_t_ptr = make_pointer_type(type_ptrdiff_t, TYPE_QUALIFIER_NONE);
+ type_ssize_t_ptr = make_pointer_type(type_ssize_t, TYPE_QUALIFIER_NONE);
+ type_wchar_t_ptr = make_pointer_type(type_wchar_t, TYPE_QUALIFIER_NONE);
+}
+
+/**
+ * Parse a translation unit.
+ */
static translation_unit_t *parse_translation_unit(void)
{
translation_unit_t *unit = allocate_ast_zero(sizeof(unit[0]));
assert(context == NULL);
set_context(&unit->context);
+ initialize_builtin_types();
+
while(token.type != T_EOF) {
- parse_declaration();
+ if (token.type == ';') {
+ /* TODO error in strict mode */
+ warningf(HERE, "stray ';' outside of function");
+ next_token();
+ } else {
+ parse_external_declaration();
+ }
}
assert(context == &unit->context);
return unit;
}
+/**
+ * Parse the input.
+ *
+ * @return the translation unit or NULL if errors occurred.
+ */
translation_unit_t *parse(void)
{
environment_stack = NEW_ARR_F(stack_entry_t, 0);
label_stack = NEW_ARR_F(stack_entry_t, 0);
- found_error = false;
+ diagnostic_count = 0;
+ error_count = 0;
+ warning_count = 0;
type_set_output(stderr);
ast_set_output(stderr);
DEL_ARR_F(environment_stack);
DEL_ARR_F(label_stack);
- if(found_error)
+ if(error_count > 0)
return NULL;
return unit;
}
+/**
+ * Initialize the parser.
+ */
void init_parser(void)
{
init_expression_parsers();
obstack_init(&temp_obst);
- type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
- type_long_double = make_atomic_type(ATOMIC_TYPE_LONG_DOUBLE, TYPE_QUALIFIER_NONE);
- type_double = make_atomic_type(ATOMIC_TYPE_DOUBLE, TYPE_QUALIFIER_NONE);
- type_float = make_atomic_type(ATOMIC_TYPE_FLOAT, TYPE_QUALIFIER_NONE);
- type_size_t = make_atomic_type(ATOMIC_TYPE_ULONG, TYPE_QUALIFIER_NONE);
- type_ptrdiff_t = make_atomic_type(ATOMIC_TYPE_LONG, TYPE_QUALIFIER_NONE);
- type_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_NONE);
- type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
- type_void_ptr = make_pointer_type(type_void, TYPE_QUALIFIER_NONE);
- type_string = make_pointer_type(type_char, TYPE_QUALIFIER_NONE);
+ symbol_t *const va_list_sym = symbol_table_insert("__builtin_va_list");
+ type_valist = create_builtin_type(va_list_sym, type_void_ptr);
}
+/**
+ * Terminate the parser.
+ */
void exit_parser(void)
{
obstack_free(&temp_obst, NULL);
projects / cparser / blobdiff