Grammar Example

JSON Parser Example

#include"parser.h"intmain() {constchar *string ="import aaa.bbb.ccc;\n""int<int, value> main() {\n""  a < b > c;\n""  test(a, b, c);""}";    GLRParser<>parser(true);    parser.reset(string, string +strlen(string));    parser.parse();if (parser.accept()) {auto value = parser.value();        std::cout << value.dump(4) << std::endl;    }return0;}

Output

{"id":12,"kind":"program","position": {"column":0,"line":0    },"value": [        {"id":8,"items": ["aaa","bbb","ccc"            ],"kind":"import","position": {"column":0,"line":0            }        },        {"block": [                {"kind":"merge","value": [                        {"id":18,"kind":"expr","position": {"column":2,"line":2                            },"value": {"id":5,"kind":"binary","left": {"id":5,"kind":"variable","name":"a","position": {"column":2,"line":2                                    }                                },"op":"<","position": {"column":2,"line":2                                },"right": {"id":5,"kind":"binary","left": {"id":5,"kind":"variable","name":"b","position": {"column":6,"line":2                                        }                                    },"op":">","position": {"column":6,"line":2                                    },"right": {"id":5,"kind":"variable","name":"c","position": {"column":10,"line":2                                        }                                    }                                }                            }                        },                        {"id":16,"kind":"variable_declare","name":"c","position": {"column":2,"line":2                            },"type": {"args": [                                    {"id":15,"kind":"type_specifier","position": {"column":6,"line":2                                        },"type":"b"                                    }                                ],"id":15,"kind":"type_specifier","position": {"column":2,"line":2                                },"type":"a"                            }                        }                    ]                },                {"id":18,"kind":"expr","position": {"column":2,"line":3                    },"value": {"args": {"id":1,"kind":"argument_list","position": {"column":7,"line":3                            },"value": [                                {"id":5,"kind":"variable","name":"a","position": {"column":7,"line":3                                    }                                },                                {"id":5,"kind":"variable","name":"b","position": {"column":10,"line":3                                    }                                },                                {"id":5,"kind":"variable","name":"c","position": {"column":13,"line":3                                    }                                }                            ]                        },"id":5,"kind":"invoke","name":"test","position": {"column":2,"line":3                        }                    }                }            ],"id":7,"kind":"function_declare","name":"main","params":null,"position": {"column":0,"line":1            },"type": {"args": [                    {"id":15,"kind":"type_specifier","position": {"column":4,"line":1                        },"type":"int"                    },                    {"id":15,"kind":"type_specifier","position": {"column":9,"line":1                        },"type":"value"                    }                ],"id":15,"kind":"type_specifier","position": {"column":0,"line":1                },"type":"int"            }        }    ]}

Generator AST Directly from grammar