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 choice_prefix = { | string | range }
  26 optional = { string? }
  27 repeat = { string* }
  28 repeat_atomic = @{ string* }
  29 repeat_once = { string+ }
  30 repeat_once_atomic = @{ string+ }
  31 repeat_min_max = { string{2, 3} }
  32 repeat_min_max_atomic = @{ string{2, 3} }
  33 repeat_exact = { string{2} }
  34 repeat_min = { string{2,} }
  35 repeat_min_atomic = @{ string{2,} }
  36 repeat_max = { string{, 2} }
  37 repeat_max_atomic = @{ string{, 2} }
  38 soi_at_start = { SOI ~ string }
  39 repeat_mutate_stack = { (PUSH('a'..'c') ~ ",")* ~ POP ~ POP ~ POP }
  40 repeat_mutate_stack_pop_all = { (PUSH('a'..'c') ~ ",")* ~ POP_ALL }
  41 will_fail = { repeat_mutate_stack_pop_all ~ "FAIL" }
  42 stack_resume_after_fail = { will_fail | repeat_mutate_stack_pop_all }
  43 peek_ = { PUSH(range) ~ PUSH(range) ~ PEEK ~ PEEK }
  44 peek_all = { PUSH(range) ~ PUSH(range) ~ PEEK_ALL }
  45 peek_slice_23 = { PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PEEK[1..-2] }
  46 pop_ = { PUSH(range) ~ PUSH(range) ~ POP ~ POP }
  47 pop_all = { PUSH(range) ~ PUSH(range) ~ POP_ALL }
  48 pop_fail = { PUSH(range) ~ !POP ~ range ~ POP }
  49 checkpoint_restore = ${
  50                 PUSH("") ~ (PUSH("a") ~ "b" ~ POP | DROP ~ "b" | POP ~ "a") ~ EOI
  51 }
  52 ascii_digits = { ASCII_DIGIT+ }
  53 ascii_nonzero_digits = { ASCII_NONZERO_DIGIT+ }
  54 ascii_bin_digits = { ASCII_BIN_DIGIT+ }
  55 ascii_oct_digits = { ASCII_OCT_DIGIT+ }
  56 ascii_hex_digits = { ASCII_HEX_DIGIT+ }
  57 ascii_alpha_lowers = { ASCII_ALPHA_LOWER+ }
  58 ascii_alpha_uppers = { ASCII_ALPHA_UPPER+ }
  59 ascii_alphas = { ASCII_ALPHA+ }
  60 ascii_alphanumerics = { ASCII_ALPHANUMERIC+ }
  61 asciis = { ASCII+ }
  62 newline = { NEWLINE+ }
  63 unicode = { XID_START ~ XID_CONTINUE* }
  64 SYMBOL = { "shadows builtin" }
  65
  66 han = { HAN+ }
  67 hangul = { HANGUL+ }
  68 hiragana = { HIRAGANA+ }
  69 arabic = { ARABIC+ }
  70
  71 WHITESPACE = _{ " " }
  72 COMMENT = _{ "$"+ }
  73
  74 // Line comment
  75
  76 /* 1-line multiline comment */
  77
  78 /*
  79         N-line multiline comment
  80 */
  81
  82 /*
  83         // Line comment inside multiline
  84
  85         /*
  86                 (Multiline inside) multiline
  87         */
  88
  89         Invalid segment of grammar below (repeated rule)
  90
  91         WHITESPACE = _{ "hi" }
  92 */