| 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; |
| 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 | |