Parser.h 3.0 KB

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  1. /*
  2. * Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. *
  8. * 1. Redistributions of source code must retain the above copyright notice, this
  9. * list of conditions and the following disclaimer.
  10. *
  11. * 2. Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. *
  15. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #pragma once
  27. #include "AST.h"
  28. #include "Lexer.h"
  29. #include <AK/NonnullOwnPtr.h>
  30. namespace JS {
  31. enum class Associativity {
  32. Left,
  33. Right
  34. };
  35. class Parser {
  36. public:
  37. explicit Parser(Lexer lexer);
  38. NonnullOwnPtr<Program> parse_program();
  39. NonnullOwnPtr<Statement> parse_statement();
  40. NonnullOwnPtr<BlockStatement> parse_block_statement();
  41. NonnullOwnPtr<ReturnStatement> parse_return_statement();
  42. NonnullOwnPtr<FunctionDeclaration> parse_function_declaration();
  43. NonnullOwnPtr<VariableDeclaration> parse_variable_declaration();
  44. NonnullOwnPtr<ForStatement> parse_for_statement();
  45. NonnullOwnPtr<Expression> parse_expression(int min_precedence, Associativity associate = Associativity::Right);
  46. NonnullOwnPtr<Expression> parse_primary_expression();
  47. NonnullOwnPtr<Expression> parse_unary_prefixed_expression();
  48. NonnullOwnPtr<ObjectExpression> parse_object_expression();
  49. NonnullOwnPtr<Expression> parse_secondary_expression(NonnullOwnPtr<Expression>, int min_precedence, Associativity associate = Associativity::Right);
  50. NonnullOwnPtr<CallExpression> parse_call_expression(NonnullOwnPtr<Expression>);
  51. bool has_errors() const { return m_has_errors; }
  52. private:
  53. int operator_precedence(TokenType) const;
  54. Associativity operator_associativity(TokenType) const;
  55. bool match_expression() const;
  56. bool match_unary_prefixed_expression() const;
  57. bool match_secondary_expression() const;
  58. bool match_statement() const;
  59. bool match(TokenType type) const;
  60. bool done() const;
  61. void expected(const char* what);
  62. Token consume();
  63. Token consume(TokenType type);
  64. Lexer m_lexer;
  65. Token m_current_token;
  66. bool m_has_errors = false;
  67. };
  68. }