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
21namespace Fortran::parser {
22
23class DebugParser {
24public:
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
31private:
32 const char *const str_;
33 const std::size_t length_;
34};
35
36constexpr 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

source code of flang/lib/Parser/debug-parser.h