| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #pragma once |
| |
| #include "Grammar.h" |
| |
| /** |
| * The GrammarNewBuiltin() function creates the following Grammar, which comes |
| * from Ford's original PEG paper: |
| * |
| * Grammar <- Spacing Definition+ EndOfFile |
| * Definition <- Identifier LEFTARROW Expression |
| * Expression <- Sequence (SLASH Sequence)* |
| * Sequence <- Prefix* |
| * Prefix <- (AND / NOT)? Suffix |
| * Suffix <- Primary (QUESTION / STAR / PLUS)? |
| * Primary <- Identifier !LEFTARROW |
| * / OPEN Expression CLOSE |
| * / Literal |
| * / Class |
| * / DOT |
| * Identifier <- IdentStart IdentCont* Spacing |
| * IdentStart <- [a-zA-Z_] |
| * IdentCont <- IdentStart |
| * / [0-9] |
| * Literal <- ['] (!['] Char)* ['] Spacing |
| * / ["] (!["] Char)* ["] Spacing |
| * Class <- '[' (!']' Range)* ']' Spacing |
| * Range <- Char '-' Char |
| * / Char |
| * Char <- '\\' [nrt'"\[\]\\] |
| * / '\\' [0-2] [0-7] [0-7] |
| * / '\\' [0-7] [0-7]? |
| * / !'\\' . |
| * LEFTARROW <- '<-' Spacing |
| * SLASH <- '/' Spacing |
| * AND <- '&' Spacing |
| * NOT <- '!' Spacing |
| * QUESTION <- '?' Spacing |
| * STAR <- '*' Spacing |
| * PLUS <- '+' Spacing |
| * OPEN <- '(' Spacing |
| * CLOSE <- ')' Spacing |
| * DOT <- '.' Spacing |
| * Spacing <- (Space / Comment)* |
| * Comment <- '#' (!EndOfLine .)* EndOfLine |
| * Space <- ' ' |
| * / '\t' |
| * / EndOfLine |
| * EndOfLine <- '\r\n' |
| * / '\n' |
| * / '\r' |
| * EndOfFile <- !. |
| */ |
| Grammar *GrammarNewBuiltin(void); |
