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(const char *message)
{
parser_print_prefix_pos(token.source_position);
fprintf(stderr, "\n");
}
+static void print_type_quoted(type_t *type)
+{
+ fputc('\'', stderr);
+ print_type(type);
+ fputc('\'', stderr);
+}
+
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(type);
+ print_type_quoted(type);
fputc('\n', stderr);
error();
}
{
parser_print_error_prefix_pos(source_position);
fprintf(stderr, "%s, incompatible types: ", msg);
- print_type(type1);
+ print_type_quoted(type1);
fprintf(stderr, " - ");
- print_type(type2);
+ print_type_quoted(type2);
fprintf(stderr, ")\n");
error();
}
fprintf(stderr, "definition of symbol %s%s with type ",
get_namespace_prefix(namespace), symbol->string);
error();
- print_type(declaration->type);
+ 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(previous_declaration->type);
+ print_type_quoted(previous_declaration->type);
fputc('\n', stderr);
}
return previous_declaration;
symbol->declaration = declaration->symbol_next;
} else {
symbol->declaration = old_declaration;
- assert(old_declaration->symbol_next ==
- declaration->symbol_next);
}
} else {
- for(; declaration != NULL; declaration = declaration->symbol_next) {
- declaration_t *symbol_next = declaration->symbol_next;
- if(symbol_next->namespace == namespace) {
- declaration->symbol_next = old_declaration;
- assert(old_declaration->symbol_next
- == symbol_next->symbol_next);
+ declaration_t *iter_last = declaration;
+ declaration_t *iter = declaration->symbol_next;
+ for( ; iter != NULL; iter_last = iter, iter = iter->symbol_next) {
+ /* replace an entry? */
+ if(iter->namespace == namespace) {
+ assert(iter_last != NULL);
+ iter_last->symbol_next = old_declaration;
+ old_declaration->symbol_next = iter->symbol_next;
break;
}
}
- assert(declaration != NULL);
+ assert(iter != NULL);
}
}
return create_cast_expression(expression, dest_type);
}
if(dest_type->type == TYPE_POINTER) {
+ pointer_type_t *pointer_type
+ = (pointer_type_t*) dest_type;
if(source_type->type == TYPE_POINTER) {
if(!pointers_compatible(source_type, dest_type)) {
type_error_incompatible("can't implicitely cast types",
expression->source_position,
source_type, dest_type);
+ return expression;
} else {
return create_cast_expression(expression, dest_type);
}
+ } else if(source_type->type == TYPE_ARRAY) {
+ array_type_t *array_type = (array_type_t*) source_type;
+ if(!types_compatible(array_type->element_type,
+ pointer_type->points_to)) {
+ type_error_incompatible("can't implicitely cast types",
+ expression->source_position,
+ source_type, dest_type);
+ return expression;
+ }
+ return create_cast_expression(expression, dest_type);
}
}
parser_print_error_prefix();
fprintf(stderr, "incompatible types in %s\n", context);
parser_print_error_prefix();
- print_type(type_left);
+ print_type_quoted(type_left);
fputs(" <- ", stderr);
- print_type(type_right);
+ print_type_quoted(type_right);
fputs("\n", stderr);
}
return parse_sub_expression(2);
}
-static void parse_compound_type_entries(void);
-static declaration_t *parse_declarator(storage_class_t storage_class,
- type_t *type, int may_be_abstract);
-static declaration_t *record_declaration(declaration_t *declaration);
-
typedef struct declaration_specifiers_t declaration_specifiers_t;
struct declaration_specifiers_t {
storage_class_t storage_class;
+ bool is_inline;
type_t *type;
};
+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);
+
static const char *parse_string_literals(void)
{
assert(token.type == T_STRING_LITERAL);
designator = allocate_ast_zero(sizeof(designator[0]));
next_token();
if(token.type != T_IDENTIFIER) {
- parse_error_expected("problem while parsing designator",
+ parse_error_expected("while parsing designator",
T_IDENTIFIER, 0);
return NULL;
}
break;
if(token.type != ',') {
- parse_error_expected("problem while parsing initializer list",
- ',', '}', 0);
+ parse_error_expected("while parsing initializer list", ',', '}', 0);
eat_block();
return result;
}
}
} else if(token.type != '{') {
if(is_struct) {
- parse_error_expected("problem while parsing struct type specifier",
+ parse_error_expected("while parsing struct type specifier",
T_IDENTIFIER, '{', 0);
} else {
- parse_error_expected("problem while parsing union type specifier",
+ parse_error_expected("while parsing union type specifier",
T_IDENTIFIER, '{', 0);
}
}
declaration->source_position = token.source_position;
declaration->symbol = symbol;
+ record_declaration(declaration);
}
if(token.type == '{') {
is_struct ? "struct" : "union", symbol->string);
declaration->context.declarations = NULL;
}
- record_declaration(declaration);
declaration->init.is_defined = true;
int top = environment_top();
declaration_t *entry = allocate_ast_zero(sizeof(entry[0]));
if(token.type != T_IDENTIFIER) {
- parse_error_expected("problem while parsing enum entry",
- T_IDENTIFIER, 0);
+ parse_error_expected("while parsing enum entry", T_IDENTIFIER, 0);
eat_block();
return;
}
declaration = get_declaration(symbol, NAMESPACE_ENUM);
} else if(token.type != '{') {
- parse_error_expected("problem while parsing enum type specifier",
+ parse_error_expected("while parsing enum type specifier",
T_IDENTIFIER, '{', 0);
return NULL;
} else {
MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
- MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
case T___extension__:
/* TODO */
#ifdef PROVIDE_IMAGINARY
MATCH_SPECIFIER(T__Imaginary, SPECIFIER_IMAGINARY, "_Imaginary")
#endif
+ case T_inline:
+ next_token();
+ specifiers->is_inline = true;
+ break;
+
case T_long:
next_token();
if(type_specifiers & SPECIFIER_LONG_LONG) {
MATCH_TYPE_QUALIFIER(T_const, TYPE_QUALIFIER_CONST);
MATCH_TYPE_QUALIFIER(T_restrict, TYPE_QUALIFIER_RESTRICT);
MATCH_TYPE_QUALIFIER(T_volatile, TYPE_QUALIFIER_VOLATILE);
- MATCH_TYPE_QUALIFIER(T_inline, TYPE_QUALIFIER_INLINE);
default:
return type_qualifiers;
{
while(true) {
if(token.type != T_IDENTIFIER) {
- parse_error_expected("problem while parsing parameter identifier "
- "list", T_IDENTIFIER, 0);
+ parse_error_expected("while parsing parameter identifier list",
+ T_IDENTIFIER, 0);
return;
}
next_token();
parse_declaration_specifiers(&specifiers);
- declaration_t *declaration = parse_declarator(specifiers.storage_class,
- specifiers.type, 1);
+ declaration_t *declaration
+ = parse_declarator(&specifiers, specifiers.type, true);
/* TODO check declaration constraints for parameters */
if(declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
}
typedef enum {
+ CONSTRUCT_INVALID,
CONSTRUCT_POINTER,
CONSTRUCT_FUNCTION,
CONSTRUCT_ARRAY
parsed_pointer_t *pointer = obstack_alloc(&temp_obst, sizeof(pointer[0]));
memset(pointer, 0, sizeof(pointer[0]));
- pointer->type_qualifiers = parse_type_qualifiers();
+ pointer->construct_type.type = CONSTRUCT_POINTER;
+ pointer->type_qualifiers = parse_type_qualifiers();
return (construct_type_t*) pointer;
}
parsed_array_t *array = obstack_alloc(&temp_obst, sizeof(array[0]));
memset(array, 0, sizeof(array[0]));
+ array->construct_type.type = CONSTRUCT_ARRAY;
if(token.type == T_static) {
array->is_static = true;
default:
if(may_be_abstract)
break;
- parse_error_expected("problem while parsing declarator", T_IDENTIFIER,
- '(', 0);
+ parse_error_expected("while parsing declarator", T_IDENTIFIER, '(', 0);
}
while(true) {
array_type_t *array_type;
switch(iter->type) {
+ case CONSTRUCT_INVALID:
+ panic("invalid type construction found");
case CONSTRUCT_FUNCTION:
construct_function_type = (construct_function_type_t*) iter;
function_type = construct_function_type->function_type;
return type;
}
-static declaration_t *parse_declarator(storage_class_t storage_class,
- type_t *type, int may_be_abstract)
+static declaration_t *parse_declarator(
+ const declaration_specifiers_t *specifiers,
+ type_t *type, bool may_be_abstract)
{
declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
- declaration->storage_class = storage_class;
+ declaration->storage_class = specifiers->storage_class;
+ declaration->is_inline = specifiers->is_inline;
construct_type_t *construct_type
= parse_inner_declarator(declaration, may_be_abstract);
{
while(true) {
declaration_t *ndeclaration
- = parse_declarator(specifiers->storage_class, specifiers->type, 0);
+ = parse_declarator(specifiers, specifiers->type, false);
declaration_t *declaration = record_declaration(ndeclaration);
+
+ type_t *type = declaration->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);
+ }
+
if(token.type == '=') {
next_token();
/* TODO (bitfields) */
} else {
declaration_t *declaration
- = parse_declarator(specifiers->storage_class,
- specifiers->type, 1);
+ = parse_declarator(specifiers, specifiers->type, true);
/* TODO: check constraints for struct declarations */
/* TODO: check for doubled fields */
expression_parser_function_t expression_parsers[T_LAST_TOKEN];
+static expression_t *make_invalid_expression(void)
+{
+ expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
+ expression->type = EXPR_INVALID;
+ expression->source_position = token.source_position;
+ return expression;
+}
+
static expression_t *expected_expression_error(void)
{
parser_print_error_prefix();
print_token(stderr, & token);
fprintf(stderr, "\n");
- expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
- expression->type = EXPR_INVALID;
next_token();
- return expression;
+ return make_invalid_expression();
}
static expression_t *parse_string_const(void)
designator_t *result = allocate_ast_zero(sizeof(result[0]));
if(token.type != T_IDENTIFIER) {
- parse_error_expected("problem while parsing member designator",
+ parse_error_expected("while parsing member designator",
T_IDENTIFIER, 0);
eat_brace();
return NULL;
if(token.type == '.') {
next_token();
if(token.type != T_IDENTIFIER) {
- parse_error_expected("problem while parsing member designator",
- T_IDENTIFIER, 0);
+ parse_error_expected("while parsing member designator",
+ T_IDENTIFIER, 0);
eat_brace();
return NULL;
}
fprintf(stderr, "\n");
eat_statement();
- expression_t *expression = allocate_ast_zero(sizeof(expression[0]));
- expression->type = EXPR_INVALID;
- expression->datatype = type_void;
-
- return expression;
+ return make_invalid_expression();
}
static expression_t *parse_array_expression(unsigned precedence,
array_access->array_ref = array_ref;
array_access->index = parse_expression();
- type_t *array_type = array_ref->datatype;
- if(array_type != NULL) {
- if(array_type->type == TYPE_POINTER) {
- pointer_type_t *pointer = (pointer_type_t*) array_type;
+ type_t *type = array_ref->datatype;
+ if(type != NULL) {
+ if(type->type == TYPE_POINTER) {
+ pointer_type_t *pointer = (pointer_type_t*) type;
array_access->expression.datatype = pointer->points_to;
+ } else if(type->type == TYPE_ARRAY) {
+ array_type_t *array_type = (array_type_t*) type;
+ array_access->expression.datatype = array_type->element_type;
} else {
parser_print_error_prefix();
fprintf(stderr, "array access on object with non-pointer type ");
- print_type(array_type);
+ print_type_quoted(type);
fprintf(stderr, "\n");
}
}
expression_t *compound)
{
(void) precedence;
-
assert(token.type == '.' || token.type == T_MINUSGREATER);
+
+ bool is_pointer = (token.type == T_MINUSGREATER);
next_token();
select_expression_t *select = allocate_ast_zero(sizeof(select[0]));
select->expression.type = EXPR_SELECT;
select->compound = compound;
- /* TODO: datatype */
-
if(token.type != T_IDENTIFIER) {
- parse_error_expected("Problem while parsing select", T_IDENTIFIER, 0);
+ parse_error_expected("while parsing select", T_IDENTIFIER, 0);
return (expression_t*) select;
}
- select->symbol = token.v.symbol;
+ symbol_t *symbol = token.v.symbol;
+ select->symbol = symbol;
next_token();
+ type_t *type = compound->datatype;
+ if(type == NULL)
+ return make_invalid_expression();
+
+ 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(type);
+ fputc('\n', stderr);
+ return make_invalid_expression();
+ }
+ pointer_type_t *pointer_type = (pointer_type_t*) type;
+ 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();
+ }
+
+ compound_type_t *compound_type = (compound_type_t*) type_left;
+ 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();
+ }
+
+ declaration_t *iter = declaration->context.declarations;
+ for( ; iter != NULL; iter = iter->next) {
+ if(iter->symbol == symbol) {
+ break;
+ }
+ }
+ if(iter == NULL) {
+ parser_print_error_prefix();
+ print_type_quoted(type_left);
+ fprintf(stderr, " has no memeber named '%s'\n", symbol->string);
+ return make_invalid_expression();
+ }
+
+ select->compound_entry = iter;
+ select->expression.datatype = iter->type;
return (expression_t*) select;
}
fputs("called object '", stderr);
print_expression(expression);
fputs("' (type ", stderr);
- print_type(type);
+ print_type_quoted(type);
fputs("is not a function\n", stderr);
function_type = NULL;
} else if(/* 1 is pointer to object type, other is void* */ false) {
/* TODO */
} else {
- type_error_incompatible("problem while parsing conditional",
+ type_error_incompatible("while parsing conditional",
expression->source_position, true_type,
false_type);
}
if(orig_type == NULL)
return;
+ expression_t *value = expression->value;
+ if(value->type == EXPR_REFERENCE) {
+ reference_expression_t *reference = (reference_expression_t*) value;
+ declaration_t *declaration = reference->declaration;
+ if(declaration != NULL) {
+ declaration->address_taken = 1;
+ }
+ }
+
expression->expression.datatype = make_pointer_type(orig_type, 0);
}
expression->expression.datatype = arithmetic_type;
}
+static void semantic_shift_op(binary_expression_t *expression)
+{
+ expression_t *left = expression->left;
+ expression_t *right = expression->right;
+ type_t *orig_type_left = left->datatype;
+ type_t *orig_type_right = right->datatype;
+
+ if(orig_type_left == NULL || orig_type_right == NULL)
+ return;
+
+ type_t *type_left = skip_typeref(orig_type_left);
+ type_t *type_right = skip_typeref(orig_type_right);
+
+ 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");
+ return;
+ }
+
+ type_left = promote_integer(type_left);
+ type_right = promote_integer(type_right);
+
+ expression->left = create_implicit_cast(left, type_left);
+ expression->right = create_implicit_cast(right, type_right);
+ expression->expression.datatype = type_left;
+}
+
static void semantic_add(binary_expression_t *expression)
{
expression_t *left = expression->left;
} else {
parser_print_error_prefix();
fprintf(stderr, "invalid operands to binary + (");
- print_type(orig_type_left);
+ print_type_quoted(orig_type_left);
fprintf(stderr, ", ");
- print_type(orig_type_right);
+ print_type_quoted(orig_type_right);
fprintf(stderr, ")\n");
}
}
if(!pointers_compatible(type_left, type_right)) {
parser_print_error_prefix();
fprintf(stderr, "pointers to incompatible objects to binary - (");
- print_type(orig_type_left);
+ print_type_quoted(orig_type_left);
fprintf(stderr, ", ");
- print_type(orig_type_right);
+ print_type_quoted(orig_type_right);
fprintf(stderr, ")\n");
} else {
expression->expression.datatype = type_ptrdiff_t;
} else {
parser_print_error_prefix();
fprintf(stderr, "invalid operands to binary - (");
- print_type(orig_type_left);
+ print_type_quoted(orig_type_left);
fprintf(stderr, ", ");
- print_type(orig_type_right);
+ print_type_quoted(orig_type_right);
fprintf(stderr, ")\n");
}
}
CREATE_BINEXPR_PARSER(T_PIPEPIPE, BINEXPR_LOGICAL_OR, semantic_logical_op, 1)
/* TODO shift has a bit special semantic */
CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT,
- semantic_binexpr_arithmetic, 1)
+ semantic_shift_op, 1)
CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT,
- semantic_binexpr_arithmetic, 1)
+ semantic_shift_op, 1)
CREATE_BINEXPR_PARSER(T_PLUSEQUAL, BINEXPR_ADD_ASSIGN,
semantic_arithmetic_assign, 0)
CREATE_BINEXPR_PARSER(T_MINUSEQUAL, BINEXPR_SUB_ASSIGN,
left = parser->infix_parser(parser->infix_precedence, left);
assert(left != NULL);
- assert(left->type != EXPR_INVALID);
+ assert(left->type != EXPR_UNKNOWN);
left->source_position = source_position;
}
projects / cparser / blobdiff