1 //===-- lib/Parser/debug-parser.h -------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef FORTRAN_PARSER_DEBUG_PARSER_H_ 10 #define FORTRAN_PARSER_DEBUG_PARSER_H_ 11 12 // Implements the parser with syntax "(YOUR MESSAGE HERE)"_debug for use 13 // in temporary modifications to the grammar intended for tracing the 14 // flow of the parsers. Not to be used in production. 15 16 #include "basic-parsers.h" 17 #include "flang/Parser/parse-state.h" 18 #include <cstddef> 19 #include <optional> 20 21 namespace Fortran::parser { 22 23 class DebugParser { 24 public: 25 using resultType = Success; 26 constexpr DebugParser(const DebugParser &) = default; DebugParser(const char * str,std::size_t n)27 constexpr DebugParser(const char *str, std::size_t n) 28 : str_{str}, length_{n} {} 29 std::optional<Success> Parse(ParseState &) const; 30 31 private: 32 const char *const str_; 33 const std::size_t length_; 34 }; 35 36 constexpr DebugParser operator""_debug(const char str[], std::size_t n) { 37 return DebugParser{str, n}; 38 } 39 } // namespace Fortran::parser 40 #endif // FORTRAN_PARSER_DEBUG_PARSER_H_ 41