Parser.h 2.8 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889
  1. /*
  2. * Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
  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 <AK/String.h>
  28. #include <AK/StringView.h>
  29. #include <LibSQL/AST.h>
  30. #include <LibSQL/Lexer.h>
  31. #include <LibSQL/Token.h>
  32. namespace SQL {
  33. class Parser {
  34. struct Position {
  35. size_t line { 0 };
  36. size_t column { 0 };
  37. };
  38. struct Error {
  39. String message;
  40. Position position;
  41. String to_string() const
  42. {
  43. return String::formatted("{} (line: {}, column: {})", message, position.line, position.column);
  44. }
  45. };
  46. public:
  47. explicit Parser(Lexer lexer);
  48. NonnullRefPtr<Statement> next_statement();
  49. bool has_errors() const { return m_parser_state.m_errors.size(); }
  50. const Vector<Error>& errors() const { return m_parser_state.m_errors; }
  51. private:
  52. struct ParserState {
  53. explicit ParserState(Lexer);
  54. Lexer m_lexer;
  55. Token m_token;
  56. Vector<Error> m_errors;
  57. };
  58. NonnullRefPtr<CreateTable> parse_create_table_statement();
  59. NonnullRefPtr<DropTable> parse_drop_table_statement();
  60. NonnullRefPtr<ColumnDefinition> parse_column_definition();
  61. NonnullRefPtr<TypeName> parse_type_name();
  62. NonnullRefPtr<SignedNumber> parse_signed_number();
  63. Token consume();
  64. Token consume(TokenType type);
  65. bool consume_if(TokenType type);
  66. bool match(TokenType type) const;
  67. void expected(StringView what);
  68. void syntax_error(String message);
  69. Position position() const;
  70. ParserState m_parser_state;
  71. };
  72. }