FLANG

debug-parser.h
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_
Fortran::parser::Success
Definition: user-state.h:33
Fortran::parser::ParseState
Definition: parse-state.h:35
Fortran::parser
Definition: check-expression.h:19
Fortran::parser::DebugParser
Definition: debug-parser.h:23