X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=parser.c;h=f1bbaa64ada5d7b52d457a9479e3e6d53b4bf214;hb=3ebfcac30456a053d3eba3fb1a2df7b1e73668b8;hp=463a444aa0f366818c15f21b0759877b297ecfb0;hpb=81877f87c8abb6e39d38622b289ac6f3059f1eb6;p=cparser diff --git a/parser.c b/parser.c index 463a444..f1bbaa6 100644 --- a/parser.c +++ b/parser.c @@ -23,6 +23,7 @@ #include #include +#include "adt/strutil.h" #include "parser.h" #include "diagnostic.h" #include "format_check.h" @@ -283,25 +284,26 @@ static void semantic_comparison(binary_expression_t *expression); static size_t get_statement_struct_size(statement_kind_t kind) { static const size_t sizes[] = { - [STATEMENT_ERROR] = sizeof(statement_base_t), - [STATEMENT_EMPTY] = sizeof(statement_base_t), - [STATEMENT_COMPOUND] = sizeof(compound_statement_t), - [STATEMENT_RETURN] = sizeof(return_statement_t), - [STATEMENT_DECLARATION] = sizeof(declaration_statement_t), - [STATEMENT_IF] = sizeof(if_statement_t), - [STATEMENT_SWITCH] = sizeof(switch_statement_t), - [STATEMENT_EXPRESSION] = sizeof(expression_statement_t), - [STATEMENT_CONTINUE] = sizeof(statement_base_t), - [STATEMENT_BREAK] = sizeof(statement_base_t), - [STATEMENT_GOTO] = sizeof(goto_statement_t), - [STATEMENT_LABEL] = sizeof(label_statement_t), - [STATEMENT_CASE_LABEL] = sizeof(case_label_statement_t), - [STATEMENT_WHILE] = sizeof(while_statement_t), - [STATEMENT_DO_WHILE] = sizeof(do_while_statement_t), - [STATEMENT_FOR] = sizeof(for_statement_t), - [STATEMENT_ASM] = sizeof(asm_statement_t), - [STATEMENT_MS_TRY] = sizeof(ms_try_statement_t), - [STATEMENT_LEAVE] = sizeof(leave_statement_t) + [STATEMENT_ERROR] = sizeof(statement_base_t), + [STATEMENT_EMPTY] = sizeof(statement_base_t), + [STATEMENT_COMPOUND] = sizeof(compound_statement_t), + [STATEMENT_RETURN] = sizeof(return_statement_t), + [STATEMENT_DECLARATION] = sizeof(declaration_statement_t), + [STATEMENT_IF] = sizeof(if_statement_t), + [STATEMENT_SWITCH] = sizeof(switch_statement_t), + [STATEMENT_EXPRESSION] = sizeof(expression_statement_t), + [STATEMENT_CONTINUE] = sizeof(statement_base_t), + [STATEMENT_BREAK] = sizeof(statement_base_t), + [STATEMENT_COMPUTED_GOTO] = sizeof(computed_goto_statement_t), + [STATEMENT_GOTO] = sizeof(goto_statement_t), + [STATEMENT_LABEL] = sizeof(label_statement_t), + [STATEMENT_CASE_LABEL] = sizeof(case_label_statement_t), + [STATEMENT_WHILE] = sizeof(while_statement_t), + [STATEMENT_DO_WHILE] = sizeof(do_while_statement_t), + [STATEMENT_FOR] = sizeof(for_statement_t), + [STATEMENT_ASM] = sizeof(asm_statement_t), + [STATEMENT_MS_TRY] = sizeof(ms_try_statement_t), + [STATEMENT_LEAVE] = sizeof(leave_statement_t) }; assert((size_t)kind < lengthof(sizes)); assert(sizes[kind] != 0); @@ -318,7 +320,7 @@ static size_t get_expression_struct_size(expression_kind_t kind) static const size_t sizes[] = { [EXPR_ERROR] = sizeof(expression_base_t), [EXPR_REFERENCE] = sizeof(reference_expression_t), - [EXPR_REFERENCE_ENUM_VALUE] = sizeof(reference_expression_t), + [EXPR_ENUM_CONSTANT] = sizeof(reference_expression_t), [EXPR_LITERAL_BOOLEAN] = sizeof(literal_expression_t), [EXPR_LITERAL_INTEGER] = sizeof(literal_expression_t), [EXPR_LITERAL_INTEGER_OCTAL] = sizeof(literal_expression_t), @@ -997,10 +999,10 @@ static assign_error_t semantic_assign(type_t *orig_type_left, 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)) + if (is_type_void(points_to_left)) return res; - if (is_type_atomic(points_to_right, ATOMIC_TYPE_VOID)) { + if (is_type_void(points_to_right)) { /* ISO/IEC 14882:1998(E) §C.1.2:6 */ return c_mode & _CXX ? ASSIGN_ERROR_INCOMPATIBLE : res; } @@ -1071,22 +1073,6 @@ static string_t parse_string_literals(void) return result; } -/** - * compare two string, ignoring double underscores on the second. - */ -static int strcmp_underscore(const char *s1, const char *s2) -{ - if (s2[0] == '_' && s2[1] == '_') { - size_t len2 = strlen(s2); - size_t len1 = strlen(s1); - if (len1 == len2-4 && s2[len2-2] == '_' && s2[len2-1] == '_') { - return strncmp(s1, s2+2, len2-4); - } - } - - return strcmp(s1, s2); -} - static attribute_t *allocate_attribute_zero(attribute_kind_t kind) { attribute_t *attribute = allocate_ast_zero(sizeof(*attribute)); @@ -1231,8 +1217,7 @@ static attribute_t *parse_attribute_gnu_single(void) } const char *attribute_name = get_attribute_name(kind); - if (attribute_name != NULL - && strcmp_underscore(attribute_name, name) == 0) + if (attribute_name != NULL && streq_underscore(attribute_name, name)) break; } @@ -1456,7 +1441,7 @@ static void mark_vars_read(expression_t *const expr, entity_t *lhs_ent) case EXPR_UNARY_CAST: /* Special case: Use void cast to mark a variable as "read" */ - if (is_type_atomic(skip_typeref(expr->base.type), ATOMIC_TYPE_VOID)) + if (is_type_void(skip_typeref(expr->base.type))) lhs_ent = NULL; goto unary; @@ -1537,7 +1522,7 @@ unary: determine_lhs_ent(expr->va_starte.ap, lhs_ent); return; - EXPR_LITERAL_CASES + case EXPR_LITERAL_CASES: case EXPR_ERROR: case EXPR_STRING_LITERAL: case EXPR_WIDE_STRING_LITERAL: @@ -1551,7 +1536,7 @@ unary: case EXPR_OFFSETOF: case EXPR_STATEMENT: // TODO case EXPR_LABEL_ADDRESS: - case EXPR_REFERENCE_ENUM_VALUE: + case EXPR_ENUM_CONSTANT: return; } @@ -1681,15 +1666,6 @@ static initializer_t *initializer_from_expression(type_t *orig_type, return result; } -/** - * Checks if a given expression can be used as a constant initializer. - */ -static bool is_initializer_constant(const expression_t *expression) -{ - return is_constant_expression(expression) != EXPR_CLASS_VARIABLE || - is_linker_constant(expression) != EXPR_CLASS_VARIABLE; -} - /** * Parses an scalar initializer. * @@ -1710,7 +1686,7 @@ static initializer_t *parse_scalar_initializer(type_t *type, expression_t *expression = parse_assignment_expression(); mark_vars_read(expression, NULL); - if (must_be_constant && !is_initializer_constant(expression)) { + if (must_be_constant && !is_linker_constant(expression)) { errorf(&expression->base.source_position, "initialisation expression '%E' is not constant", expression); @@ -2130,7 +2106,7 @@ finish_designator: expression_t *expression = parse_assignment_expression(); mark_vars_read(expression, NULL); - if (env->must_be_constant && !is_initializer_constant(expression)) { + if (env->must_be_constant && !is_linker_constant(expression)) { errorf(&expression->base.source_position, "Initialisation expression '%E' is not constant", expression); @@ -2627,9 +2603,9 @@ static attribute_t *parse_attribute_ms_property(attribute_t *attribute) symbol_t **prop; symbol_t *symbol = token.identifier.symbol; - if (strcmp(symbol->string, "put") == 0) { + if (streq(symbol->string, "put")) { prop = &property->put_symbol; - } else if (strcmp(symbol->string, "get") == 0) { + } else if (streq(symbol->string, "get")) { prop = &property->get_symbol; } else { errorf(HERE, "expected put or get in property declspec"); @@ -2665,7 +2641,7 @@ static attribute_t *parse_microsoft_extended_decl_modifier_single(void) for (attribute_kind_t k = ATTRIBUTE_MS_FIRST; k <= ATTRIBUTE_MS_LAST; ++k) { const char *attribute_name = get_attribute_name(k); - if (attribute_name != NULL && strcmp(attribute_name, name) == 0) { + if (attribute_name != NULL && streq(attribute_name, name)) { kind = k; break; } @@ -3232,6 +3208,8 @@ static void semantic_parameter_incomplete(const entity_t *entity) static bool has_parameters(void) { /* func(void) is not a parameter */ + if (look_ahead(1)->kind != ')') + return true; if (token.kind == T_IDENTIFIER) { entity_t const *const entity = get_entity(token.identifier.symbol, NAMESPACE_NORMAL); @@ -3239,13 +3217,20 @@ static bool has_parameters(void) return true; if (entity->kind != ENTITY_TYPEDEF) return true; - if (skip_typeref(entity->typedefe.type) != type_void) + type_t const *const type = skip_typeref(entity->typedefe.type); + if (!is_type_void(type)) return true; + if (c_mode & _CXX) { + /* ISO/IEC 14882:1998(E) §8.3.5:2 It must be literally (void). A typedef + * is not allowed. */ + errorf(HERE, "empty parameter list defined with a typedef of 'void' not allowed in C++"); + } else if (type->base.qualifiers != TYPE_QUALIFIER_NONE) { + /* §6.7.5.3:10 Qualification is not allowed here. */ + errorf(HERE, "'void' as parameter must not have type qualifiers"); + } } else if (token.kind != T_void) { return true; } - if (look_ahead(1)->kind != ')') - return true; next_token(); return false; } @@ -3888,6 +3873,10 @@ static entity_t *parse_declarator(const declaration_specifiers_t *specifiers, handle_entity_attributes(attributes, entity); } + if (entity->kind == ENTITY_FUNCTION && !freestanding) { + adapt_special_functions(&entity->function); + } + return entity; } @@ -3978,7 +3967,7 @@ warn_arg_count: */ static bool is_sym_main(const symbol_t *const sym) { - return strcmp(sym->string, "main") == 0; + return streq(sym->string, "main"); } static void error_redefined_as_different_kind(const source_position_t *pos, @@ -4104,8 +4093,22 @@ entity_t *record_entity(entity_t *entity, const bool is_definition) goto finish; } if (previous_entity->kind == ENTITY_TYPEDEF) { - /* TODO: C++ allows this for exactly the same type */ - errorf(pos, "redefinition of '%N' (declared %P)", entity, ppos); + type_t *const type = skip_typeref(entity->typedefe.type); + type_t *const prev_type + = skip_typeref(previous_entity->typedefe.type); + if (c_mode & _CXX) { + /* C++ allows double typedef if they are identical + * (after skipping typedefs) */ + if (type == prev_type) + goto finish; + } else { + /* GCC extension: redef in system headers is allowed */ + if ((pos->is_system_header || ppos->is_system_header) && + types_compatible(type, prev_type)) + goto finish; + } + errorf(pos, "redefinition of '%N' (declared %P)", + entity, ppos); goto finish; } @@ -4185,7 +4188,7 @@ warn_redundant_declaration: ; merge_in_attributes(decl, prev_decl->attributes); } else if (!is_definition && is_type_valid(prev_type) && - strcmp(ppos->input_name, "") != 0) { + !pos->is_system_header) { warningf(WARN_REDUNDANT_DECLS, pos, "redundant declaration for '%Y' (declared %P)", symbol, ppos); } } else if (current_function == NULL) { @@ -4627,10 +4630,6 @@ static void check_labels(void) for (const goto_statement_t *goto_statement = goto_first; goto_statement != NULL; goto_statement = goto_statement->next) { - /* skip computed gotos */ - if (goto_statement->expression != NULL) - continue; - label_t *label = goto_statement->label; if (label->base.source_position.input_name == NULL) { print_in_function(); @@ -4730,10 +4729,12 @@ static bool expression_returns(expression_t const *const expr) switch (expr->kind) { case EXPR_CALL: { expression_t const *const func = expr->call.function; - if (func->kind == EXPR_REFERENCE) { - entity_t *entity = func->reference.entity; - if (entity->kind == ENTITY_FUNCTION - && entity->declaration.modifiers & DM_NORETURN) + type_t const *const type = skip_typeref(func->base.type); + if (type->kind == TYPE_POINTER) { + type_t const *const points_to + = skip_typeref(type->pointer.points_to); + if (points_to->kind == TYPE_FUNCTION + && points_to->function.modifiers & DM_NORETURN) return false; } @@ -4749,8 +4750,8 @@ static bool expression_returns(expression_t const *const expr) } case EXPR_REFERENCE: - case EXPR_REFERENCE_ENUM_VALUE: - EXPR_LITERAL_CASES + case EXPR_ENUM_CONSTANT: + case EXPR_LITERAL_CASES: case EXPR_STRING_LITERAL: case EXPR_WIDE_STRING_LITERAL: case EXPR_COMPOUND_LITERAL: // TODO descend into initialisers @@ -4803,13 +4804,13 @@ static bool expression_returns(expression_t const *const expr) case EXPR_VA_COPY: return expression_returns(expr->va_copye.src); - EXPR_UNARY_CASES_MANDATORY + case EXPR_UNARY_CASES_MANDATORY: return expression_returns(expr->unary.value); case EXPR_UNARY_THROW: return false; - EXPR_BINARY_CASES + case EXPR_BINARY_CASES: // TODO handle constant lhs of && and || return expression_returns(expr->binary.left) && @@ -5008,20 +5009,21 @@ static void check_reachable(statement_t *const stmt) found_break_parent: break; - case STATEMENT_GOTO: - if (stmt->gotos.expression) { - if (!expression_returns(stmt->gotos.expression)) - return; + case STATEMENT_COMPUTED_GOTO: { + if (!expression_returns(stmt->computed_goto.expression)) + return; - statement_t *parent = stmt->base.parent; - if (parent == NULL) /* top level goto */ - return; - next = parent; - } else { - next = stmt->gotos.label->statement; - if (next == NULL) /* missing label */ - return; - } + statement_t *parent = stmt->base.parent; + if (parent == NULL) /* top level goto */ + return; + next = parent; + break; + } + + case STATEMENT_GOTO: + next = stmt->gotos.label->statement; + if (next == NULL) /* missing label */ + return; break; case STATEMENT_LABEL: @@ -5118,8 +5120,8 @@ found_break_parent: type_t *const type = skip_typeref(current_function->base.type); assert(is_type_function(type)); type_t *const ret = skip_typeref(type->function.return_type); - if (!is_type_atomic(ret, ATOMIC_TYPE_VOID) && - is_type_valid(ret) && + if (!is_type_void(ret) && + is_type_valid(ret) && !is_sym_main(current_function->base.base.symbol)) { source_position_t const *const pos = &stmt->base.source_position; warningf(WARN_RETURN_TYPE, pos, "control reaches end of non-void function"); @@ -5136,6 +5138,7 @@ found_break_parent: case STATEMENT_RETURN: case STATEMENT_CONTINUE: case STATEMENT_BREAK: + case STATEMENT_COMPUTED_GOTO: case STATEMENT_GOTO: case STATEMENT_LEAVE: panic("invalid control flow in function"); @@ -5319,6 +5322,22 @@ warn_unreachable: } } +static bool is_main(entity_t *entity) +{ + static symbol_t *sym_main = NULL; + if (sym_main == NULL) { + sym_main = symbol_table_insert("main"); + } + + if (entity->base.symbol != sym_main) + return false; + /* must be in outermost scope */ + if (entity->base.parent_scope != file_scope) + return false; + + return true; +} + static void parse_external_declaration(void) { /* function-definitions and declarations both start with declaration @@ -5468,6 +5487,9 @@ static void parse_external_declaration(void) } } + if (is_main(entity) && enable_main_collect2_hack) + prepare_main_collect2(entity); + POP_PARENT(); assert(current_function == function); assert(current_entity == entity); @@ -5703,6 +5725,8 @@ static void parse_compound_declarators(compound_t *compound, token.kind != ';' || look_ahead(1)->kind != '}') { errorf(pos, "'%N' has incomplete type '%T'", entity, orig_type); + } else if (compound->members.entities == NULL) { + errorf(pos, "flexible array member in otherwise empty struct"); } } } @@ -6218,7 +6242,7 @@ static expression_t *parse_reference(void) expression_kind_t kind = EXPR_REFERENCE; if (entity->kind == ENTITY_ENUM_VALUE) - kind = EXPR_REFERENCE_ENUM_VALUE; + kind = EXPR_ENUM_CONSTANT; expression_t *expression = allocate_expression_zero(kind); expression->base.source_position = pos; @@ -6258,7 +6282,7 @@ static bool semantic_cast(expression_t *cast) source_position_t const *pos = &cast->base.source_position; /* §6.5.4 A (void) cast is explicitly permitted, more for documentation than for utility. */ - if (dst_type == type_void) + if (is_type_void(dst_type)) return true; /* only integer and pointer can be casted to pointer */ @@ -6853,9 +6877,10 @@ static expression_t *parse_noop_expression(void) if (token.kind != ')') do { (void)parse_assignment_expression(); } while (next_if(',')); + + rem_anchor_token(','); + rem_anchor_token(')'); } - rem_anchor_token(','); - rem_anchor_token(')'); expect(')', end_error); end_error: @@ -7036,7 +7061,7 @@ typeprop_expression: type_t const* const type = skip_typeref(orig_type); char const* wrong_type = NULL; if (is_type_incomplete(type)) { - if (!is_type_atomic(type, ATOMIC_TYPE_VOID) || !GNU_MODE) + if (!is_type_void(type) || !GNU_MODE) wrong_type = "incomplete"; } else if (type->kind == TYPE_FUNCTION) { if (GNU_MODE) { @@ -7466,16 +7491,14 @@ end_error:; /* 6.5.15.3 */ source_position_t const *const pos = &conditional->base.source_position; type_t *result_type; - if (is_type_atomic(true_type, ATOMIC_TYPE_VOID) || - is_type_atomic(false_type, ATOMIC_TYPE_VOID)) { + if (is_type_void(true_type) || is_type_void(false_type)) { /* ISO/IEC 14882:1998(E) §5.16:2 */ if (true_expression->kind == EXPR_UNARY_THROW) { result_type = false_type; } else if (false_expression->kind == EXPR_UNARY_THROW) { result_type = true_type; } else { - if (!is_type_atomic(true_type, ATOMIC_TYPE_VOID) || - !is_type_atomic(false_type, ATOMIC_TYPE_VOID)) { + if (!is_type_void(true_type) || !is_type_void(false_type)) { warningf(WARN_OTHER, pos, "ISO C forbids conditional expression with only one void side"); } result_type = type_void; @@ -7508,8 +7531,7 @@ end_error:; type_t *to2 = skip_typeref(other_type->pointer.points_to); type_t *to; - if (is_type_atomic(to1, ATOMIC_TYPE_VOID) || - is_type_atomic(to2, ATOMIC_TYPE_VOID)) { + if (is_type_void(to1) || is_type_void(to2)) { to = type_void; } else if (types_compatible(get_unqualified_type(to1), get_unqualified_type(to2))) { @@ -7603,7 +7625,7 @@ end_error:; errorf(&value->base.source_position, "operand of delete must have pointer type"); } - } else if (is_type_atomic(skip_typeref(type->pointer.points_to), ATOMIC_TYPE_VOID)) { + } else if (is_type_void(skip_typeref(type->pointer.points_to))) { source_position_t const *const pos = &value->base.source_position; warningf(WARN_OTHER, pos, "deleting 'void*' is undefined"); } @@ -7634,8 +7656,7 @@ static expression_t *parse_throw(void) "cannot throw object of incomplete type '%T'", orig_type); } else if (is_type_pointer(type)) { type_t *const points_to = skip_typeref(type->pointer.points_to); - if (is_type_incomplete(points_to) && - !is_type_atomic(points_to, ATOMIC_TYPE_VOID)) { + if (is_type_incomplete(points_to) && !is_type_void(points_to)) { errorf(&value->base.source_position, "cannot throw pointer to incomplete type '%T'", orig_type); } @@ -7658,7 +7679,7 @@ static bool check_pointer_arithmetic(const source_position_t *source_position, points_to = skip_typeref(points_to); if (is_type_incomplete(points_to)) { - if (!GNU_MODE || !is_type_atomic(points_to, ATOMIC_TYPE_VOID)) { + if (!GNU_MODE || !is_type_void(points_to)) { errorf(source_position, "arithmetic with pointer to incomplete type '%T' not allowed", orig_pointer_type); @@ -8172,7 +8193,7 @@ static void semantic_sub(binary_expression_t *expression) "subtracting pointers to incompatible types '%T' and '%T'", orig_type_left, orig_type_right); } else if (!is_type_object(unqual_left)) { - if (!is_type_atomic(unqual_left, ATOMIC_TYPE_VOID)) { + if (!is_type_void(unqual_left)) { errorf(pos, "subtracting pointers to non-object types '%T'", orig_type_left); } else { @@ -8527,7 +8548,7 @@ static bool expression_has_effect(const expression_t *const expr) switch (expr->kind) { case EXPR_ERROR: return true; /* do NOT warn */ case EXPR_REFERENCE: return false; - case EXPR_REFERENCE_ENUM_VALUE: return false; + case EXPR_ENUM_CONSTANT: return false; case EXPR_LABEL_ADDRESS: return false; /* suppress the warning for microsoft __noop operations */ @@ -8595,7 +8616,7 @@ static bool expression_has_effect(const expression_t *const expr) * suppress the warning */ case EXPR_UNARY_CAST: { type_t *const type = skip_typeref(expr->base.type); - return is_type_atomic(type, ATOMIC_TYPE_VOID); + return is_type_void(type); } case EXPR_UNARY_ASSUME: return true; @@ -9080,7 +9101,22 @@ static statement_t *parse_case_statement(void) eat(T_case); - expression_t *const expression = parse_expression(); + expression_t *expression = parse_expression(); + type_t *expression_type = expression->base.type; + type_t *skipped = skip_typeref(expression_type); + if (!is_type_integer(skipped) && is_type_valid(skipped)) { + errorf(pos, "case expression '%E' must have integer type but has type '%T'", + expression, expression_type); + } + + type_t *type = expression_type; + if (current_switch != NULL) { + type_t *switch_type = current_switch->expression->base.type; + if (is_type_valid(switch_type)) { + expression = create_implicit_cast(expression, switch_type); + } + } + statement->case_label.expression = expression; expression_classification_t const expr_class = is_constant_expression(expression); if (expr_class != EXPR_CLASS_CONSTANT) { @@ -9096,7 +9132,15 @@ static statement_t *parse_case_statement(void) if (GNU_MODE) { if (next_if(T_DOTDOTDOT)) { - expression_t *const end_range = parse_expression(); + expression_t *end_range = parse_expression(); + expression_type = expression->base.type; + skipped = skip_typeref(expression_type); + if (!is_type_integer(skipped) && is_type_valid(skipped)) { + errorf(pos, "case expression '%E' must have integer type but has type '%T'", + expression, expression_type); + } + + end_range = create_implicit_cast(end_range, type); statement->case_label.end_range = end_range; expression_classification_t const end_class = is_constant_expression(end_range); if (end_class != EXPR_CLASS_CONSTANT) { @@ -9540,10 +9584,12 @@ end_error1: */ static statement_t *parse_goto(void) { - statement_t *statement = allocate_statement_zero(STATEMENT_GOTO); - eat(T_goto); + statement_t *statement; + if (GNU_MODE && look_ahead(1)->kind == '*') { + statement = allocate_statement_zero(STATEMENT_COMPUTED_GOTO); + eat(T_goto); + eat('*'); - if (GNU_MODE && next_if('*')) { expression_t *expression = parse_expression(); mark_vars_read(expression, NULL); @@ -9561,24 +9607,28 @@ static statement_t *parse_goto(void) expression = create_implicit_cast(expression, type_void_ptr); } - statement->gotos.expression = expression; - } else if (token.kind == T_IDENTIFIER) { - label_t *const label = get_label(); - label->used = true; - statement->gotos.label = label; + statement->computed_goto.expression = expression; } else { - if (GNU_MODE) - parse_error_expected("while parsing goto", T_IDENTIFIER, '*', NULL); - else - parse_error_expected("while parsing goto", T_IDENTIFIER, NULL); - eat_until_anchor(); - return create_error_statement(); + statement = allocate_statement_zero(STATEMENT_GOTO); + eat(T_goto); + if (token.kind == T_IDENTIFIER) { + label_t *const label = get_label(); + label->used = true; + statement->gotos.label = label; + + /* remember the goto's in a list for later checking */ + *goto_anchor = &statement->gotos; + goto_anchor = &statement->gotos.next; + } else { + if (GNU_MODE) + parse_error_expected("while parsing goto", T_IDENTIFIER, '*', NULL); + else + parse_error_expected("while parsing goto", T_IDENTIFIER, NULL); + eat_until_anchor(); + return create_error_statement(); + } } - /* remember the goto's in a list for later checking */ - *goto_anchor = &statement->gotos; - goto_anchor = &statement->gotos.next; - expect(';', end_error); end_error: @@ -9690,6 +9740,15 @@ entity_t *expression_is_variable(const expression_t *expression) return entity; } +static void err_or_warn(source_position_t const *const pos, char const *const msg) +{ + if (c_mode & _CXX || strict_mode) { + errorf(pos, msg); + } else { + warningf(WARN_OTHER, pos, msg); + } +} + /** * Parse a return statement. */ @@ -9712,24 +9771,14 @@ static statement_t *parse_return(void) if (return_value != NULL) { type_t *return_value_type = skip_typeref(return_value->base.type); - if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) { - if (is_type_atomic(return_value_type, ATOMIC_TYPE_VOID)) { + if (is_type_void(return_type)) { + if (!is_type_void(return_value_type)) { /* ISO/IEC 14882:1998(E) §6.6.3:2 */ /* Only warn in C mode, because GCC does the same */ - if (c_mode & _CXX || strict_mode) { - errorf(pos, - "'return' with a value, in function returning 'void'"); - } else { - warningf(WARN_OTHER, pos, "'return' with a value, in function returning 'void'"); - } + err_or_warn(pos, "'return' with a value, in function returning 'void'"); } else if (!(c_mode & _CXX)) { /* ISO/IEC 14882:1998(E) §6.6.3:3 */ /* Only warn in C mode, because GCC does the same */ - if (strict_mode) { - errorf(pos, - "'return' with expression in function returning 'void'"); - } else { - warningf(WARN_OTHER, pos, "'return' with expression in function returning 'void'"); - } + err_or_warn(pos, "'return' with expression in function returning 'void'"); } } else { assign_error_t error = semantic_assign(return_type, return_value); @@ -9744,14 +9793,9 @@ static statement_t *parse_return(void) warningf(WARN_OTHER, pos, "function returns address of local variable"); } } - } else if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) { + } else if (!is_type_void(return_type)) { /* ISO/IEC 14882:1998(E) §6.6.3:3 */ - if (c_mode & _CXX || strict_mode) { - errorf(pos, - "'return' without value, in function returning non-void"); - } else { - warningf(WARN_OTHER, pos, "'return' without value, in function returning non-void"); - } + err_or_warn(pos, "'return' without value, in function returning non-void"); } statement->returns.value = return_value; @@ -9954,10 +9998,8 @@ end_error: */ static statement_t *intern_parse_statement(void) { - statement_t *statement = NULL; - /* declaration or statement */ - add_anchor_token(';'); + statement_t *statement; switch (token.kind) { case T_IDENTIFIER: { token_kind_t la1_type = (token_kind_t)look_ahead(1)->kind; @@ -10028,14 +10070,9 @@ static statement_t *intern_parse_statement(void) default: errorf(HERE, "unexpected token %K while parsing statement", &token); statement = create_error_statement(); - if (!at_anchor()) - next_token(); + eat_until_anchor(); break; } - rem_anchor_token(';'); - - assert(statement != NULL - && statement->base.source_position.input_name != NULL); return statement; } @@ -10080,6 +10117,7 @@ static statement_t *parse_compound_statement(bool inside_expression_statement) add_anchor_token('*'); add_anchor_token('+'); add_anchor_token('-'); + add_anchor_token(';'); add_anchor_token('{'); add_anchor_token('~'); add_anchor_token(T_CHARACTER_CONSTANT); @@ -10292,6 +10330,7 @@ end_error: rem_anchor_token(T_CHARACTER_CONSTANT); rem_anchor_token('~'); rem_anchor_token('{'); + rem_anchor_token(';'); rem_anchor_token('-'); rem_anchor_token('+'); rem_anchor_token('*'); @@ -10369,9 +10408,9 @@ static void parse_linkage_specification(void) linkage_kind_t old_linkage = current_linkage; linkage_kind_t new_linkage; - if (strcmp(linkage, "C") == 0) { + if (streq(linkage, "C")) { new_linkage = LINKAGE_C; - } else if (strcmp(linkage, "C++") == 0) { + } else if (streq(linkage, "C++")) { new_linkage = LINKAGE_CXX; } else { errorf(&pos, "linkage string \"%s\" not recognized", linkage); @@ -10569,6 +10608,8 @@ static void complete_incomplete_arrays(void) void prepare_main_collect2(entity_t *entity) { + PUSH_SCOPE(&entity->function.statement->compound.scope); + // create call to __main symbol_t *symbol = symbol_table_insert("__main"); entity_t *subsubmain_ent @@ -10595,6 +10636,8 @@ void prepare_main_collect2(entity_t *entity) expr_statement->base.next = compounds->statements; compounds->statements = expr_statement; + + POP_SCOPE(); } void parse(void)