vendor/pest_derive/tests/grammar.pest

   1 // pest. The Elegant Parser
   2 // Copyright (c) 2018 Dragoș Tiselice
   3 //
   4 // Licensed under the Apache License, Version 2.0
   5 // <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
   6 // license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   7 // option. All files in the project carrying such notice may not be copied,
   8 // modified, or distributed except according to those terms.
   9
  10 string = { "abc" }
  11 insensitive = { ^"abc" }
  12 range = { '0'..'9' }
  13 ident = { string }
  14 pos_pred = { &string }
  15 neg_pred = { !string }
  16 double_neg_pred = { !!string }
  17 sequence = !{ string ~ string }
  18 sequence_compound = ${ string ~ string }
  19 sequence_atomic = @{ string ~ string }
  20 sequence_non_atomic = @{ sequence }
  21 sequence_atomic_compound = @{ sequence_compound }
  22 sequence_nested = { string ~ string }
  23 sequence_compound_nested = ${ sequence_nested }
  24 choice = { string | range }
  25 optional = { string? }
  26 repeat = { string* }
  27 repeat_atomic = @{ string* }
  28 repeat_once = { string+ }
  29 repeat_once_atomic = @{ string+ }
  30 repeat_min_max = { string{2, 3} }
  31 repeat_min_max_atomic = @{ string{2, 3} }
  32 repeat_exact = { string{2} }
  33 repeat_min = { string{2,} }
  34 repeat_min_atomic = @{ string{2,} }
  35 repeat_max = { string{, 2} }
  36 repeat_max_atomic = @{ string{, 2} }
  37 peek_ = { push(range) ~ push(range) ~ peek ~ peek }
  38 pop_ = { push(range) ~ push(range) ~ pop ~ pop }
  39 pop_fail = { push(range) ~ !pop ~ range ~ pop }
  40 whitespace = _{ " " }
  41 comment = _{ "$"+ }