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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-exception6//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 use13// in temporary modifications to the grammar intended for tracing the14// 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::parser40#endif // FORTRAN_PARSER_DEBUG_PARSER_H_41