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121 lines
3.5 KiB
C++
Executable file
121 lines
3.5 KiB
C++
Executable file
// Copyright (c) 2021 Daniel Deptford
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// Copyright (c) 2021-2022 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
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#ifndef TAO_PEGTL_CONTRIB_PEG_HPP
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#define TAO_PEGTL_CONTRIB_PEG_HPP
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#include <tao/pegtl.hpp>
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namespace TAO_PEGTL_NAMESPACE::peg
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{
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// PEG grammar from https://pdos.csail.mit.edu/~baford/packrat/popl04/peg-popl04.pdf
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namespace grammar
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{
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// clang-format off
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struct AND;
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struct Char;
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struct Class;
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struct CLOSE;
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struct Comment;
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struct Definition;
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struct DOT;
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struct EndOfFile;
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struct EndOfLine;
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struct Expression;
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struct QUESTION;
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struct IdentCont;
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struct Identifier;
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struct IdentStart;
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struct LEFTARROW;
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struct Literal;
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struct NOT;
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struct OPEN;
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struct PLUS;
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struct Prefix;
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struct Primary;
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struct Range;
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struct Sequence;
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struct SLASH;
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struct Space;
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struct Spacing;
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struct STAR;
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struct Suffix;
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struct Grammar : seq< Spacing, plus< Definition >, EndOfFile > {};
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struct Definition : seq< Identifier, LEFTARROW, Expression > {};
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struct Expression : list< Sequence, SLASH > {};
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struct Sequence : star< Prefix > {};
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struct Prefix : seq< opt< sor< AND, NOT > >, Suffix > {};
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struct Suffix : seq< Primary, opt< sor< QUESTION, STAR, PLUS > > > {};
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struct Primary : sor<
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seq< Identifier, not_at< LEFTARROW > >,
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seq< OPEN, Expression, CLOSE >,
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Literal,
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Class,
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DOT
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> {};
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struct Identifier : seq< IdentStart, star< IdentCont >, Spacing > {};
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struct IdentStart : identifier_first {};
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struct IdentCont : identifier_other {};
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struct Literal : sor<
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seq< one< '\'' >, until< one< '\'' >, Char >, Spacing >,
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seq< one< '"' >, until< one< '"' >, Char >, Spacing >
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> {};
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struct Class : seq< one< '[' >, until< one< ']' >, Range >, Spacing > {};
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struct Range : sor<
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seq< Char, one< '-' >, Char >,
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Char
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> {};
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struct Char : sor<
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seq<
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one< '\\' >,
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one< 'n', 'r', 't', '\'', '"', '[', ']', '\\' > >,
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seq<
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one< '\\' >,
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range< '0', '2' >,
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range< '0', '7' >,
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range< '0', '7' > >,
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seq<
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one< '\\' >,
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range< '0','7' >,
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opt< range< '0','7' > > >,
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seq<
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not_at< one< '\\' > >,
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any >
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> {};
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struct LEFTARROW : seq< string< '<','-' >, Spacing > {};
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struct SLASH : seq< one< '/' >, Spacing > {};
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struct AND : seq< one< '&' >, Spacing > {};
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struct NOT : seq< one< '!' >, Spacing > {};
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struct QUESTION : seq< one< '?' >, Spacing > {};
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struct STAR : seq< one< '*' >, Spacing > {};
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struct PLUS : seq< one< '+' >, Spacing > {};
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struct OPEN : seq< one< '(' >, Spacing > {};
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struct CLOSE : seq< one< ')' >, Spacing > {};
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struct DOT : seq< one< '.' >, Spacing > {};
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struct Spacing : star< sor< Space, Comment > > {};
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struct Comment : seq< one< '#' >, until< EndOfLine > > {};
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struct Space : sor< one< ' ', '\t' >, EndOfLine > {};
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struct EndOfLine : sor< string< '\r', '\n' >, one< '\n' >, one< '\r' > > {};
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struct EndOfFile : eof {};
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// clang-format on
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} // namespace grammar
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} // namespace TAO_PEGTL_NAMESPACE::peg
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#endif // TAO_PEGTL_CONTRIB_PEG_HPP
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