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LibJS: Disallow 'return' outside of a function
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5feb7e8d28
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9a82c22a85
Notes:
sideshowbarker
2024-07-19 01:58:35 +09:00
Author: https://github.com/mattco98 Commit: https://github.com/SerenityOS/serenity/commit/9a82c22a85f Pull-request: https://github.com/SerenityOS/serenity/pull/3711 Issue: https://github.com/SerenityOS/serenity/issues/3607
@ -396,6 +396,7 @@ RefPtr<FunctionExpression> Parser::try_parse_arrow_function_expression(bool expe
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bool is_strict = false;
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auto function_body_result = [&]() -> RefPtr<BlockStatement> {
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TemporaryChange change(m_parser_state.m_in_function_context, true);
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if (match(TokenType::CurlyOpen)) {
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// Parse a function body with statements
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return parse_block_statement(is_strict);
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@ -1202,6 +1203,9 @@ NonnullRefPtr<NewExpression> Parser::parse_new_expression()
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NonnullRefPtr<ReturnStatement> Parser::parse_return_statement()
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{
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if (!m_parser_state.m_in_function_context)
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syntax_error("'return' not allowed outside of a function");
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consume(TokenType::Return);
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// Automatic semicolon insertion: terminate statement when return is followed by newline
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@ -1315,6 +1319,7 @@ NonnullRefPtr<FunctionNodeType> Parser::parse_function_node(bool check_for_funct
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function_length = parameters.size();
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bool is_strict = false;
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TemporaryChange change(m_parser_state.m_in_function_context, true);
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auto body = parse_block_statement(is_strict);
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body->add_variables(m_parser_state.m_var_scopes.last());
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body->add_functions(m_parser_state.m_function_scopes.last());
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@ -158,6 +158,7 @@ private:
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bool m_strict_mode { false };
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bool m_allow_super_property_lookup { false };
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bool m_allow_super_constructor_call { false };
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bool m_in_function_context { false };
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explicit ParserState(Lexer);
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};
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