// pest. The Elegant Parser
// Copyright (c) 2018 Dragoș Tiselice
//
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.

// Modified by Boyi Huang (@TheVeryDarkness) when upgrading to pest3.

string = "abc"
insensitive = i"abc"
range = '0'..'9'
ident = string
pos_pred = &string
neg_pred = !string
double_neg_pred = !!string
sequence_atomic = string - string
sequence_optional_trivia = string ~ string
sequence_mandatory_trivia = string ^ string
sequence_nested = string ~ string
sequence_compound_nested = sequence_nested
choice = string | range
choice_prefix = | string | range
optional = string?
repeat = string~*
repeat_atomic = string*
repeat_once = string~+
repeat_once_atomic = string+
repeat_min_max = string~{2..3}
repeat_min_max_atomic = string{2..3}
repeat_exact = string~{2}
repeat_min = string~{2..}
repeat_min_atomic = string{2..}
repeat_max = string~{..2}
repeat_max_atomic = string{..2}
soi_at_start = pest::SOI - string
repeat_mutate_stack = (pest::stack::push('a'..'c') - ",")* - pest::stack::pop - pest::stack::pop - pest::stack::pop
repeat_mutate_stack_pop_all = (pest::stack::push('a'..'c') - ",")* - pest::stack::pop_all
will_fail = repeat_mutate_stack_pop_all - "FAIL"
stack_resume_after_fail = will_fail | repeat_mutate_stack_pop_all
peek_ = pest::stack::push(range) - pest::stack::push(range) - pest::stack::peek - pest::stack::peek
peek_all = pest::stack::push(range) - pest::stack::push(range) - pest::stack::peek_all
peek_slice_23 = pest::stack::push(range) - pest::stack::push(range) - pest::stack::push(range) ~ pest::stack::push(range) ~ pest::stack::push(range) ~ pest::stack::peek[1..-2]
pop_ = pest::stack::push(range) - pest::stack::push(range) - pest::stack::pop - pest::stack::pop
pop_all = pest::stack::push(range) - pest::stack::push(range) - pest::stack::pop_all
pop_fail = pest::stack::push(range) - !pest::stack::pop - range - pest::stack::pop
checkpoint_restore = pest::stack::push("") - (pest::stack::push("a") - "b" - pest::stack::pop | pest::stack::drop - "b" | pest::stack::pop - "a") - pest::EOI

/*
ascii_digits = ASCII_DIGIT+
ascii_nonzero_digits = ASCII_NONZERO_DIGIT+
ascii_bin_digits = ASCII_BIN_DIGIT+
ascii_oct_digits = ASCII_OCT_DIGIT+
ascii_hex_digits = ASCII_HEX_DIGIT+
ascii_alpha_lowers = ASCII_ALPHA_LOWER+
ascii_alpha_uppers = ASCII_ALPHA_UPPER+
ascii_alphas = ASCII_ALPHA+
ascii_alphanumerics = ASCII_ALPHANUMERIC+
asciis = ASCII+
newline = NEWLINE+
unicode = XID_START - XID_CONTINUE*
SYMBOL = "shadows builtin"

han = HAN+
hangul = HANGUL+
hiragana = HIRAGANA+
arabic = ARABIC+
emoji = EMOJI+
*/

~ = (" " | "$")*
^ = (" " | "$")+

// Line comment

/* 1-line multiline comment */

/*
	N-line multiline comment
*/

/*
	// Line comment inside multiline

	/*
		(Multiline inside) multiline
	*/

	Invalid segment of grammar below (repeated rule)

	WHITESPACE = _"hi"
*/