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- /*
- * Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #pragma once
- #include "AST.h"
- #include "Lexer.h"
- #include <AK/NonnullOwnPtr.h>
- namespace JS {
- enum class Associativity {
- Left,
- Right
- };
- class Parser {
- public:
- explicit Parser(Lexer lexer);
- NonnullOwnPtr<Program> parse_program();
- NonnullOwnPtr<Statement> parse_statement();
- NonnullOwnPtr<BlockStatement> parse_block_statement();
- NonnullOwnPtr<ReturnStatement> parse_return_statement();
- NonnullOwnPtr<FunctionDeclaration> parse_function_declaration();
- NonnullOwnPtr<VariableDeclaration> parse_variable_declaration();
- NonnullOwnPtr<ForStatement> parse_for_statement();
- NonnullOwnPtr<Expression> parse_expression(int min_precedence, Associativity associate = Associativity::Right);
- NonnullOwnPtr<Expression> parse_primary_expression();
- NonnullOwnPtr<Expression> parse_unary_prefixed_expression();
- NonnullOwnPtr<ObjectExpression> parse_object_expression();
- NonnullOwnPtr<Expression> parse_secondary_expression(NonnullOwnPtr<Expression>, int min_precedence, Associativity associate = Associativity::Right);
- NonnullOwnPtr<CallExpression> parse_call_expression(NonnullOwnPtr<Expression>);
- bool has_errors() const { return m_has_errors; }
- private:
- int operator_precedence(TokenType) const;
- Associativity operator_associativity(TokenType) const;
- bool match_expression() const;
- bool match_unary_prefixed_expression() const;
- bool match_secondary_expression() const;
- bool match_statement() const;
- bool match(TokenType type) const;
- bool done() const;
- void expected(const char* what);
- Token consume();
- Token consume(TokenType type);
- Lexer m_lexer;
- Token m_current_token;
- bool m_has_errors = false;
- };
- }
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