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 soi_at_start = { SOI ~ string }
  38 repeat_mutate_stack = { (PUSH('a'..'c') ~ ",")* ~ POP ~ POP ~ POP }
  39 peek_ = { PUSH(range) ~ PUSH(range) ~ PEEK ~ PEEK }
  40 peek_all = { PUSH(range) ~ PUSH(range) ~ PEEK_ALL }
  41 peek_slice_23 = { PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PEEK[1..-2] }
  42 pop_ = { PUSH(range) ~ PUSH(range) ~ POP ~ POP }
  43 pop_all = { PUSH(range) ~ PUSH(range) ~ POP_ALL }
  44 pop_fail = { PUSH(range) ~ !POP ~ range ~ POP }
  45 checkpoint_restore = ${
  46                 PUSH("") ~ (PUSH("a") ~ "b" ~ POP | DROP ~ "b" | POP ~ "a") ~ EOI
  47 }
  48 ascii_digits = { ASCII_DIGIT+ }
  49 ascii_nonzero_digits = { ASCII_NONZERO_DIGIT+ }
  50 ascii_bin_digits = { ASCII_BIN_DIGIT+ }
  51 ascii_oct_digits = { ASCII_OCT_DIGIT+ }
  52 ascii_hex_digits = { ASCII_HEX_DIGIT+ }
  53 ascii_alpha_lowers = { ASCII_ALPHA_LOWER+ }
  54 ascii_alpha_uppers = { ASCII_ALPHA_UPPER+ }
  55 ascii_alphas = { ASCII_ALPHA+ }
  56 ascii_alphanumerics = { ASCII_ALPHANUMERIC+ }
  57 asciis = { ASCII+ }
  58 newline = { NEWLINE+ }
  59 unicode = { XID_START ~ XID_CONTINUE* }
  60 SYMBOL = { "shadows builtin" }
  61
  62 WHITESPACE = _{ " " }
  63 COMMENT = _{ "$"+ }
  64
  65 // Line comment
  66
  67 /* 1-line multiline comment */
  68
  69 /*
  70         N-line multiline comment
  71 */
  72
  73 /*
  74         // Line comment inside multiline
  75
  76         /*
  77                 (Multiline inside) multiline
  78         */
  79
  80         Invalid segment of grammar below (repeated rule)
  81
  82         WHITESPACE = _{ "hi" }
  83 */