1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

// 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.
//! # pest meta
//!
//! This crate parses, validates, optimizes, and converts pest's own grammars to ASTs.

#![doc(
    html_logo_url = "https://raw.githubusercontent.com/pest-parser/pest/master/pest-logo.svg",
    html_favicon_url = "https://raw.githubusercontent.com/pest-parser/pest/master/pest-logo.svg"
)]
#![warn(missing_docs, rust_2018_idioms, unused_qualifications)]

#[cfg(test)]
#[macro_use]
extern crate pest;

use std::fmt::Display;

use pest::error::Error;

pub mod ast;
pub mod optimizer;
pub mod parser;
pub mod validator;

/// A helper that will unwrap the result or panic
/// with the nicely formatted error message.
pub fn unwrap_or_report<T, E>(result: Result<T, E>) -> T
where
    E: IntoIterator,
    E::Item: Display,
{
    result.unwrap_or_else(|e| {
        panic!(
            "{}{}",
            "grammar error\n\n".to_owned(),
            &e.into_iter()
                .map(|error| format!("{}", error))
                .collect::<Vec<_>>()
                .join("\n\n")
        )
    })
}

/// A tuple returned by the validation and processing of the parsed grammar.
/// The first element is the vector of used builtin rule names,
/// the second element is the vector of optimized rules.
type UsedBuiltinAndOptimized<'i> = (Vec<&'i str>, Vec<optimizer::OptimizedRule>);

/// Parses, validates, processes and optimizes the provided grammar.
pub fn parse_and_optimize(
    grammar: &str,
) -> Result<UsedBuiltinAndOptimized<'_>, Vec<Error<parser::Rule>>> {
    let pairs = match parser::parse(parser::Rule::grammar_rules, grammar) {
        Ok(pairs) => Ok(pairs),
        Err(error) => Err(vec![error]),
    }?;

    let defaults = validator::validate_pairs(pairs.clone())?;
    let ast = parser::consume_rules(pairs)?;

    Ok((defaults, optimizer::optimize(ast)))
}

#[doc(hidden)]
pub static UNICODE_PROPERTY_NAMES: &[&str] = &[
    /* BINARY */
    "ALPHABETIC",
    "BIDI_CONTROL",
    "CASE_IGNORABLE",
    "CASED",
    "CHANGES_WHEN_CASEFOLDED",
    "CHANGES_WHEN_CASEMAPPED",
    "CHANGES_WHEN_LOWERCASED",
    "CHANGES_WHEN_TITLECASED",
    "CHANGES_WHEN_UPPERCASED",
    "DASH",
    "DEFAULT_IGNORABLE_CODE_POINT",
    "DEPRECATED",
    "DIACRITIC",
    "EXTENDER",
    "GRAPHEME_BASE",
    "GRAPHEME_EXTEND",
    "GRAPHEME_LINK",
    "HEX_DIGIT",
    "HYPHEN",
    "IDS_BINARY_OPERATOR",
    "IDS_TRINARY_OPERATOR",
    "ID_CONTINUE",
    "ID_START",
    "IDEOGRAPHIC",
    "JOIN_CONTROL",
    "LOGICAL_ORDER_EXCEPTION",
    "LOWERCASE",
    "MATH",
    "NONCHARACTER_CODE_POINT",
    "OTHER_ALPHABETIC",
    "OTHER_DEFAULT_IGNORABLE_CODE_POINT",
    "OTHER_GRAPHEME_EXTEND",
    "OTHER_ID_CONTINUE",
    "OTHER_ID_START",
    "OTHER_LOWERCASE",
    "OTHER_MATH",
    "OTHER_UPPERCASE",
    "PATTERN_SYNTAX",
    "PATTERN_WHITE_SPACE",
    "PREPENDED_CONCATENATION_MARK",
    "QUOTATION_MARK",
    "RADICAL",
    "REGIONAL_INDICATOR",
    "SENTENCE_TERMINAL",
    "SOFT_DOTTED",
    "TERMINAL_PUNCTUATION",
    "UNIFIED_IDEOGRAPH",
    "UPPERCASE",
    "VARIATION_SELECTOR",
    "WHITE_SPACE",
    "XID_CONTINUE",
    "XID_START",
    /* CATEGORY */
    "CASED_LETTER",
    "CLOSE_PUNCTUATION",
    "CONNECTOR_PUNCTUATION",
    "CONTROL",
    "CURRENCY_SYMBOL",
    "DASH_PUNCTUATION",
    "DECIMAL_NUMBER",
    "ENCLOSING_MARK",
    "FINAL_PUNCTUATION",
    "FORMAT",
    "INITIAL_PUNCTUATION",
    "LETTER",
    "LETTER_NUMBER",
    "LINE_SEPARATOR",
    "LOWERCASE_LETTER",
    "MARK",
    "MATH_SYMBOL",
    "MODIFIER_LETTER",
    "MODIFIER_SYMBOL",
    "NONSPACING_MARK",
    "NUMBER",
    "OPEN_PUNCTUATION",
    "OTHER",
    "OTHER_LETTER",
    "OTHER_NUMBER",
    "OTHER_PUNCTUATION",
    "OTHER_SYMBOL",
    "PARAGRAPH_SEPARATOR",
    "PRIVATE_USE",
    "PUNCTUATION",
    "SEPARATOR",
    "SPACE_SEPARATOR",
    "SPACING_MARK",
    "SURROGATE",
    "SYMBOL",
    "TITLECASE_LETTER",
    "UNASSIGNED",
    "UPPERCASE_LETTER",
];