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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.83"
name = "pest_derive"
version = "2.8.6"
authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
build = false
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "pest's derive macro"
homepage = "https://pest.rs/"
documentation = "https://docs.rs/pest"
readme = "_README.md"
keywords = [
"pest",
"parser",
"peg",
"grammar",
]
categories = ["parsing"]
license = "MIT OR Apache-2.0"
repository = "https://github.com/pest-parser/pest"
[features]
default = ["std"]
grammar-extras = ["pest_generator/grammar-extras"]
not-bootstrap-in-src = ["pest_generator/not-bootstrap-in-src"]
std = [
"pest/std",
"pest_generator/std",
]
[lib]
name = "pest_derive"
path = "src/lib.rs"
proc-macro = true
[[example]]
name = "calc"
path = "examples/calc.rs"
[[example]]
name = "help-menu"
path = "examples/help-menu.rs"
[[test]]
name = "grammar"
path = "tests/grammar.rs"
[[test]]
name = "grammar_inline"
path = "tests/grammar_inline.rs"
[[test]]
name = "implicit"
path = "tests/implicit.rs"
[[test]]
name = "lists"
path = "tests/lists.rs"
[[test]]
name = "oneormore"
path = "tests/oneormore.rs"
[[test]]
name = "opt"
path = "tests/opt.rs"
[[test]]
name = "reporting"
path = "tests/reporting.rs"
[[test]]
name = "surround"
path = "tests/surround.rs"
[dependencies.pest]
version = "2.8.6"
default-features = false
[dependencies.pest_generator]
version = "2.8.6"
default-features = false

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<p align="center">
<img src="https://raw.github.com/pest-parser/pest/master/pest-logo.svg?sanitize=true" width="80%"/>
</p>
# pest. The Elegant Parser
[![Join the chat at https://gitter.im/pest-parser/pest](https://badges.gitter.im/dragostis/pest.svg)](https://gitter.im/pest-parser/pest?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
[![Book](https://img.shields.io/badge/book-WIP-4d76ae.svg)](https://pest.rs/book)
[![Docs](https://docs.rs/pest/badge.svg)](https://docs.rs/pest)
[![pest Continuous Integration](https://github.com/pest-parser/pest/actions/workflows/ci.yml/badge.svg)](https://github.com/pest-parser/pest/actions/workflows/ci.yml)
[![codecov](https://codecov.io/gh/pest-parser/pest/branch/master/graph/badge.svg)](https://codecov.io/gh/pest-parser/pest)
<a href="https://blog.rust-lang.org/2024/11/28/Rust-1.83.0/"><img alt="Rustc Version 1.83.0+" src="https://img.shields.io/badge/rustc-1.83.0%2B-lightgrey.svg"/></a>
[![Crates.io](https://img.shields.io/crates/d/pest.svg)](https://crates.io/crates/pest)
[![Crates.io](https://img.shields.io/crates/v/pest.svg)](https://crates.io/crates/pest)
pest is a general purpose parser written in Rust with a focus on accessibility,
correctness, and performance. It uses parsing expression grammars
(or [PEG]) as input, which are similar in spirit to regular expressions, but
which offer the enhanced expressivity needed to parse complex languages.
[PEG]: https://en.wikipedia.org/wiki/Parsing_expression_grammar
## Getting started
The recommended way to start parsing with pest is to read the official [book].
Other helpful resources:
* API reference on [docs.rs]
* play with grammars and share them on our [fiddle]
* find previous common questions answered or ask questions on [GitHub Discussions]
* leave feedback, ask questions, or greet us on [Gitter] or [Discord]
[book]: https://pest.rs/book
[docs.rs]: https://docs.rs/pest
[fiddle]: https://pest.rs/#editor
[Gitter]: https://gitter.im/pest-parser/pest
[Discord]: https://discord.gg/XEGACtWpT2
[GitHub Discussions]: https://github.com/pest-parser/pest/discussions
## Example
The following is an example of a grammar for a list of alphanumeric identifiers
where all identifiers don't start with a digit:
```rust
alpha = { 'a'..'z' | 'A'..'Z' }
digit = { '0'..'9' }
ident = { !digit ~ (alpha | digit)+ }
ident_list = _{ ident ~ (" " ~ ident)* }
// ^
// ident_list rule is silent which means it produces no tokens
```
Grammars are saved in separate .pest files which are never mixed with procedural
code. This results in an always up-to-date formalization of a language that is
easy to read and maintain.
## Meaningful error reporting
Based on the grammar definition, the parser also includes automatic error
reporting. For the example above, the input `"123"` will result in:
```
thread 'main' panicked at ' --> 1:1
|
1 | 123
| ^---
|
= unexpected digit', src/main.rs:12
```
while `"ab *"` will result in:
```
thread 'main' panicked at ' --> 1:1
|
1 | ab *
| ^---
|
= expected ident', src/main.rs:12
```
These error messages can be obtained from their default `Display` implementation,
e.g. `panic!("{}", parser_result.unwrap_err())` or `println!("{}", e)`.
## Pairs API
The grammar can be used to derive a `Parser` implementation automatically.
Parsing returns an iterator of nested token pairs:
```rust
use pest_derive::Parser;
use pest::Parser;
#[derive(Parser)]
#[grammar = "ident.pest"]
struct IdentParser;
fn main() {
let pairs = IdentParser::parse(Rule::ident_list, "a1 b2").unwrap_or_else(|e| panic!("{}", e));
// Because ident_list is silent, the iterator will contain idents
for pair in pairs {
// A pair is a combination of the rule which matched and a span of input
println!("Rule: {:?}", pair.as_rule());
println!("Span: {:?}", pair.as_span());
println!("Text: {}", pair.as_str());
// A pair can be converted to an iterator of the tokens which make it up:
for inner_pair in pair.into_inner() {
match inner_pair.as_rule() {
Rule::alpha => println!("Letter: {}", inner_pair.as_str()),
Rule::digit => println!("Digit: {}", inner_pair.as_str()),
_ => unreachable!()
};
}
}
}
```
This produces the following output:
```
Rule: ident
Span: Span { start: 0, end: 2 }
Text: a1
Letter: a
Digit: 1
Rule: ident
Span: Span { start: 3, end: 5 }
Text: b2
Letter: b
Digit: 2
```
### Defining multiple parsers in a single file
The current automatic `Parser` derivation will produce the `Rule` enum
which would have name conflicts if one tried to define multiple such structs
that automatically derive `Parser`. One possible way around it is to put each
parser struct in a separate namespace:
```rust
mod a {
#[derive(Parser)]
#[grammar = "a.pest"]
pub struct ParserA;
}
mod b {
#[derive(Parser)]
#[grammar = "b.pest"]
pub struct ParserB;
}
```
## Other features
* Precedence climbing
* Input handling
* Custom errors
* Runs on stable Rust
## Projects using pest
You can find more projects and ecosystem tools in the [awesome-pest](https://github.com/pest-parser/awesome-pest) repo.
* [pest_meta](https://github.com/pest-parser/pest/blob/master/meta/src/grammar.pest) (bootstrapped)
* [AshPaper](https://github.com/shnewto/ashpaper)
* [brain](https://github.com/brain-lang/brain)
* [cicada](https://github.com/mitnk/cicada)
* [comrak](https://github.com/kivikakk/comrak)
* [elastic-rs](https://github.com/cch123/elastic-rs)
* [graphql-parser](https://github.com/Keats/graphql-parser)
* [handlebars-rust](https://github.com/sunng87/handlebars-rust)
* [hexdino](https://github.com/Luz/hexdino)
* [Huia](https://gitlab.com/jimsy/huia/)
* [insta](https://github.com/mitsuhiko/insta)
* [jql](https://github.com/yamafaktory/jql)
* [json5-rs](https://github.com/callum-oakley/json5-rs)
* [mt940](https://github.com/svenstaro/mt940-rs)
* [Myoxine](https://github.com/d3bate/myoxine)
* [py_literal](https://github.com/jturner314/py_literal)
* [rouler](https://github.com/jarcane/rouler)
* [RuSh](https://github.com/lwandrebeck/RuSh)
* [rs_pbrt](https://github.com/wahn/rs_pbrt)
* [stache](https://github.com/dgraham/stache)
* [tera](https://github.com/Keats/tera)
* [ui_gen](https://github.com/emoon/ui_gen)
* [ukhasnet-parser](https://github.com/adamgreig/ukhasnet-parser)
* [ZoKrates](https://github.com/ZoKrates/ZoKrates)
* [Vector](https://github.com/timberio/vector)
* [AutoCorrect](https://github.com/huacnlee/autocorrect)
* [yaml-peg](https://github.com/aofdev/yaml-peg)
* [qubit](https://github.com/abhimanyu003/qubit)
* [caith](https://github.com/Geobert/caith) (a dice roller crate)
* [Melody](https://github.com/yoav-lavi/melody)
* [json5-nodes](https://github.com/jlyonsmith/json5-nodes)
* [prisma](https://github.com/prisma/prisma)
* [ws2markdown](https://code.rosaelefanten.org/ws2markdown) (a WordStar to Markdown converter)
## Minimum Supported Rust Version (MSRV)
This library should always compile with default features on **Rust 1.83.0**.
## no_std support
The `pest` and `pest_derive` crates can be built without the Rust standard
library and target embedded environments. To do so, you need to disable
their default features. In your `Cargo.toml`, you can specify it as follows:
```toml
[dependencies]
# ...
pest = { version = "2", default-features = false }
pest_derive = { version = "2", default-features = false }
```
If you want to build these crates in the pest repository's workspace, you can
pass the `--no-default-features` flag to `cargo` and specify these crates using
the `--package` (`-p`) flag. For example:
```bash
$ cargo build --target thumbv7em-none-eabihf --no-default-features -p pest
$ cargo bootstrap
$ cargo build --target thumbv7em-none-eabihf --no-default-features -p pest_derive
```
## Special thanks
A special round of applause goes to prof. Marius Minea for his guidance and all
pest contributors, some of which being none other than my friends.

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WHITESPACE = _{ " " | "\t" | NEWLINE }
int = @{ (ASCII_NONZERO_DIGIT ~ ASCII_DIGIT+ | ASCII_DIGIT) }

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program = { SOI ~ expr ~ EOI }
expr = { prefix* ~ primary ~ postfix* ~ (infix ~ prefix* ~ primary ~ postfix* )* }
infix = _{ add | sub | mul | div | pow }
add = { "+" } // Addition
sub = { "-" } // Subtraction
mul = { "*" } // Multiplication
div = { "/" } // Division
pow = { "^" } // Exponentiation
prefix = _{ neg }
neg = { "-" } // Negation
postfix = _{ fac }
fac = { "!" } // Factorial
primary = _{ int | "(" ~ expr ~ ")" }

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mod parser {
use pest_derive::Parser;
#[derive(Parser)]
#[grammar = "../examples/base.pest"]
#[grammar = "../examples/calc.pest"]
pub struct Parser;
}
use parser::Rule;
use pest::{
iterators::Pairs,
pratt_parser::{Assoc::*, Op, PrattParser},
Parser,
};
use std::io::{stdin, stdout, Write};
fn parse_to_str(pairs: Pairs<Rule>, pratt: &PrattParser<Rule>) -> String {
pratt
.map_primary(|primary| match primary.as_rule() {
Rule::int => primary.as_str().to_owned(),
Rule::expr => parse_to_str(primary.into_inner(), pratt),
_ => unreachable!(),
})
.map_prefix(|op, rhs| match op.as_rule() {
Rule::neg => format!("(-{})", rhs),
_ => unreachable!(),
})
.map_postfix(|lhs, op| match op.as_rule() {
Rule::fac => format!("({}!)", lhs),
_ => unreachable!(),
})
.map_infix(|lhs, op, rhs| match op.as_rule() {
Rule::add => format!("({}+{})", lhs, rhs),
Rule::sub => format!("({}-{})", lhs, rhs),
Rule::mul => format!("({}*{})", lhs, rhs),
Rule::div => format!("({}/{})", lhs, rhs),
Rule::pow => format!("({}^{})", lhs, rhs),
_ => unreachable!(),
})
.parse(pairs)
}
fn parse_to_i32(pairs: Pairs<Rule>, pratt: &PrattParser<Rule>) -> i128 {
pratt
.map_primary(|primary| match primary.as_rule() {
Rule::int => primary.as_str().parse().unwrap(),
Rule::expr => parse_to_i32(primary.into_inner(), pratt),
_ => unreachable!(),
})
.map_prefix(|op, rhs| match op.as_rule() {
Rule::neg => -rhs,
_ => unreachable!(),
})
.map_postfix(|lhs, op| match op.as_rule() {
Rule::fac => (1..lhs + 1).product(),
_ => unreachable!(),
})
.map_infix(|lhs, op, rhs| match op.as_rule() {
Rule::add => lhs + rhs,
Rule::sub => lhs - rhs,
Rule::mul => lhs * rhs,
Rule::div => lhs / rhs,
Rule::pow => (1..rhs + 1).map(|_| lhs).product(),
_ => unreachable!(),
})
.parse(pairs)
}
fn main() {
let pratt = PrattParser::new()
.op(Op::infix(Rule::add, Left) | Op::infix(Rule::sub, Left))
.op(Op::infix(Rule::mul, Left) | Op::infix(Rule::div, Left))
.op(Op::infix(Rule::pow, Right))
.op(Op::prefix(Rule::neg))
.op(Op::postfix(Rule::fac));
let stdin = stdin();
let mut stdout = stdout();
loop {
let source = {
print!("> ");
let _ = stdout.flush();
let mut input = String::new();
let _ = stdin.read_line(&mut input);
input.trim().to_string()
};
let pairs = match parser::Parser::parse(Rule::program, &source) {
Ok(mut parse_tree) => {
parse_tree
.next()
.unwrap()
.into_inner() // inner of program
.next()
.unwrap()
.into_inner() // inner of expr
}
Err(err) => {
println!("Failed parsing input: {:}", err);
continue;
}
};
print!("{} => ", source);
print!("{} => ", parse_to_str(pairs.clone(), &pratt));
println!("{}", parse_to_i32(pairs.clone(), &pratt));
}
}

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WHITESPACE = _{ " " }
Rew = ! { ( ASCII_DIGIT | ASCII_ALPHA_UPPER | "_" | "-" ) + }
Lit = ! { ( ASCII_ALPHANUMERIC | "_" | "-" ) + }
Word = _ { Rew | Lit }
WordGroup = _ { Word ~ ( " " ~ Word ) * }
// Argument groups are nonatomic;
// "<whitespace |between|the|bar|or|braces |is | OK>"
ArgOptChoiceGroup = { ( "[" ~ Word + ~
( "|" ~ ( Word
| ArgChoiceGroup ) + ) * ~
"]" ) + }
ArgReqChoiceGroup = { ( "<" ~ Word + ~
( "|" ~ ( Word
| ArgChoiceGroup ) + ) * ~
">" ) + }
ArgChoiceGroup = _ { ArgOptChoiceGroup
| ArgReqChoiceGroup }
Command = {
( WordGroup ) ~
( ArgChoiceGroup ) *
}
HelpMenu = {
SOI ~
(
Command ~
NEWLINE
) * ~
EOI
}

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#[macro_use]
extern crate pest_derive;
extern crate pest;
use pest::Parser;
#[derive(Parser)]
#[grammar = "../examples/help-menu.pest"]
struct HelpMenuGrammar;
const INPUT: &str = r"cli help
cli positional-command <required-single-argument> [optional-single-argument]
cli [choice | of | one | or | none | of | these | options]
cli <choice | of | one | of | these | options>
cli [nesting | <is | ok>]
";
fn main() {
HelpMenuGrammar::parse(Rule::HelpMenu, INPUT)
.expect("Error parsing file")
.next()
.expect("Infallible")
.into_inner()
.filter(|pair| Rule::Command == pair.as_rule())
.for_each(|pair| {
println!("{:#?}", pair);
});
}

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// 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.
#![doc(
html_root_url = "https://docs.rs/pest_derive",
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)]
//! # pest. The Elegant Parser
//!
//! pest is a general purpose parser written in Rust with a focus on accessibility, correctness,
//! and performance. It uses parsing expression grammars (or [PEG]) as input, which are similar in
//! spirit to regular expressions, but which offer the enhanced expressivity needed to parse
//! complex languages.
//!
//! [PEG]: https://en.wikipedia.org/wiki/Parsing_expression_grammar
//!
//! ## Getting started
//!
//! The recommended way to start parsing with pest is to read the official [book].
//!
//! Other helpful resources:
//!
//! * API reference on [docs.rs]
//! * play with grammars and share them on our [fiddle]
//! * find previous common questions answered or ask questions on [GitHub Discussions]
//! * leave feedback, ask questions, or greet us on [Gitter] or [Discord]
//!
//! [book]: https://pest.rs/book
//! [docs.rs]: https://docs.rs/pest
//! [fiddle]: https://pest.rs/#editor
//! [Gitter]: https://gitter.im/pest-parser/pest
//! [Discord]: https://discord.gg/XEGACtWpT2
//! [GitHub Discussions]: https://github.com/pest-parser/pest/discussions
//!
//!
//! ## `.pest` files
//!
//! Grammar definitions reside in custom `.pest` files located in the `src` directory. Their path is
//! relative to `src` and is specified between the `derive` attribute and empty `struct` that
//! `Parser` will be derived on.
//!
//! ```ignore
//! #[derive(Parser)]
//! #[grammar = "path/to/my_grammar.pest"] // relative to src
//! struct MyParser;
//! ```
//!
//! ## Inline grammars
//!
//! Grammars can also be inlined by using the `#[grammar_inline = "..."]` attribute.
//!
//! ## Grammar
//!
//! A grammar is a series of rules separated by whitespace, possibly containing comments.
//!
//! ### Comments
//!
//! Comments start with `//` and end at the end of the line.
//!
//! ```text
//! // a comment
//! ```
//!
//! ### Rules
//!
//! Rules have the following form:
//!
//! ```ignore
//! name = optional_modifier { expression }
//! ```
//!
//! The name of the rule is formed from alphanumeric characters or `_` with the condition that the
//! first character is not a digit and is used to create token pairs. When the rule starts being
//! parsed, the starting part of the token is being produced, with the ending part being produced
//! when the rule finishes parsing.
//!
//! The following token pair notation `a(b(), c())` denotes the tokens: start `a`, start `b`, end
//! `b`, start `c`, end `c`, end `a`.
//!
//! #### Modifiers
//!
//! Modifiers are optional and can be one of `_`, `@`, `$`, or `!`. These modifiers change the
//! behavior of the rules.
//!
//! 1. Silent (`_`)
//!
//! Silent rules do not create token pairs during parsing, nor are they error-reported.
//!
//! ```ignore
//! a = _{ "a" }
//! b = { a ~ "b" }
//! ```
//!
//! Parsing `"ab"` produces the token pair `b()`.
//!
//! 2. Atomic (`@`)
//!
//! Atomic rules do not accept whitespace or comments within their expressions and have a
//! cascading effect on any rule they call. I.e. rules that are not atomic but are called by atomic
//! rules behave atomically.
//!
//! Any rules called by atomic rules do not generate token pairs.
//!
//! ```ignore
//! a = { "a" }
//! b = @{ a ~ "b" }
//!
//! WHITESPACE = _{ " " }
//! ```
//!
//! Parsing `"ab"` produces the token pair `b()`, while `"a b"` produces an error.
//!
//! 3. Compound-atomic (`$`)
//!
//! Compound-atomic are identical to atomic rules with the exception that rules called by them are
//! not forbidden from generating token pairs.
//!
//! ```ignore
//! a = { "a" }
//! b = ${ a ~ "b" }
//!
//! WHITESPACE = _{ " " }
//! ```
//!
//! Parsing `"ab"` produces the token pairs `b(a())`, while `"a b"` produces an error.
//!
//! 4. Non-atomic (`!`)
//!
//! Non-atomic are identical to normal rules with the exception that they stop the cascading effect
//! of atomic and compound-atomic rules.
//!
//! ```ignore
//! a = { "a" }
//! b = !{ a ~ "b" }
//! c = @{ b }
//!
//! WHITESPACE = _{ " " }
//! ```
//!
//! Parsing both `"ab"` and `"a b"` produce the token pairs `c(a())`.
//!
//! #### Expressions
//!
//! Expressions can be either terminals or non-terminals.
//!
//! 1. Terminals
//!
//! | Terminal | Usage |
//! |------------|----------------------------------------------------------------|
//! | `"a"` | matches the exact string `"a"` |
//! | `^"a"` | matches the exact string `"a"` case insensitively (ASCII only) |
//! | `'a'..'z'` | matches one character between `'a'` and `'z'` |
//! | `a` | matches rule `a` |
//!
//! Strings and characters follow
//! [Rust's escape mechanisms](https://doc.rust-lang.org/reference/tokens.html#byte-escapes), while
//! identifiers can contain alphanumeric characters and underscores (`_`), as long as they do not
//! start with a digit.
//!
//! 2. Non-terminals
//!
//! | Non-terminal | Usage |
//! |-----------------------|------------------------------------------------------------|
//! | `(e)` | matches `e` |
//! | `e1 ~ e2` | matches the sequence `e1` `e2` |
//! | <code>e1 \| e2</code> | matches either `e1` or `e2` |
//! | `e*` | matches `e` zero or more times |
//! | `e+` | matches `e` one or more times |
//! | `e{n}` | matches `e` exactly `n` times |
//! | `e{, n}` | matches `e` at most `n` times |
//! | `e{n,}` | matches `e` at least `n` times |
//! | `e{m, n}` | matches `e` between `m` and `n` times inclusively |
//! | `e?` | optionally matches `e` |
//! | `&e` | matches `e` without making progress |
//! | `!e` | matches if `e` doesn't match without making progress |
//! | `PUSH(e)` | matches `e` and pushes its captured string down the stack |
//!
//! where `e`, `e1`, and `e2` are expressions.
//!
//! Matching is greedy, without backtracking. Note the difference in behavior for
//! these two rules in matching identifiers that don't end in an underscore:
//!
//! ```ignore
//! // input: ab_bb_b
//!
//! identifier = @{ "a" ~ ("b"|"_")* ~ "b" }
//! // matches: a b_bb_b nothing -> error!
//!
//! identifier = @{ "a" ~ ("_"* ~ "b")* }
//! // matches: a b, _bb, _b in three repetitions
//! ```
//!
//! Expressions can modify the stack only if they match the input. For example,
//! if `e1` in the compound expression `e1 | e2` does not match the input, then
//! it does not modify the stack, so `e2` sees the stack in the same state as
//! `e1` did. Repetitions and optionals (`e*`, `e+`, `e{, n}`, `e{n,}`,
//! `e{m,n}`, `e?`) can modify the stack each time `e` matches. The `!e` and `&e`
//! expressions are a special case; they never modify the stack.
//! Many languages have "keyword" tokens (e.g. if, for, while) as well as general
//! tokens (e.g. identifier) that matches any word. In order to match a keyword,
//! generally, you may need to restrict that is not immediately followed by another
//! letter or digit (otherwise it would be matched as an identifier).
//!
//! ## Special rules
//!
//! Special rules can be called within the grammar. They are:
//!
//! * `WHITESPACE` - runs between rules and sub-rules
//! * `COMMENT` - runs between rules and sub-rules
//! * `ANY` - matches exactly one `char`
//! * `SOI` - (start-of-input) matches only when a `Parser` is still at the starting position
//! * `EOI` - (end-of-input) matches only when a `Parser` has reached its end
//! * `POP` - pops a string from the stack and matches it
//! * `POP_ALL` - pops the entire state of the stack and matches it
//! * `PEEK` - peeks a string from the stack and matches it
//! * `PEEK[a..b]` - peeks part of the stack and matches it
//! * `PEEK_ALL` - peeks the entire state of the stack and matches it
//! * `DROP` - drops the top of the stack (fails to match if the stack is empty)
//!
//! `WHITESPACE` and `COMMENT` should be defined manually if needed. All other rules cannot be
//! overridden.
//!
//! ## `WHITESPACE` and `COMMENT`
//!
//! When defined, these rules get matched automatically in sequences (`~`) and repetitions
//! (`*`, `+`) between expressions. Atomic rules and those rules called by atomic rules are exempt
//! from this behavior.
//!
//! These rules should be defined so as to match one whitespace character and one comment only since
//! they are run in repetitions.
//!
//! If both `WHITESPACE` and `COMMENT` are defined, this grammar:
//!
//! ```ignore
//! a = { b ~ c }
//! ```
//!
//! is effectively transformed into this one behind the scenes:
//!
//! ```ignore
//! a = { b ~ WHITESPACE* ~ (COMMENT ~ WHITESPACE*)* ~ c }
//! ```
//!
//! ## `PUSH`, `POP`, `DROP`, and `PEEK`
//!
//! `PUSH(e)` simply pushes the captured string of the expression `e` down a stack. This stack can
//! then later be used to match grammar based on its content with `POP` and `PEEK`.
//!
//! `PEEK` always matches the string at the top of stack. So, if the stack contains `["b", "a"]`
//! (`"a"` being on top), this grammar:
//!
//! ```ignore
//! a = { PEEK }
//! ```
//!
//! is effectively transformed into at parse time:
//!
//! ```ignore
//! a = { "a" }
//! ```
//!
//! `POP` works the same way with the exception that it pops the string off of the stack if the
//! match worked. With the stack from above, if `POP` matches `"a"`, the stack will be mutated
//! to `["b"]`.
//!
//! `DROP` makes it possible to remove the string at the top of the stack
//! without matching it. If the stack is nonempty, `DROP` drops the top of the
//! stack. If the stack is empty, then `DROP` fails to match.
//!
//! ### Advanced peeking
//!
//! `PEEK[start..end]` and `PEEK_ALL` allow to peek deeper into the stack. The syntax works exactly
//! like Rust’s exclusive slice syntax. Additionally, negative indices can be used to indicate an
//! offset from the top. If the end lies before or at the start, the expression matches (as does
//! a `PEEK_ALL` on an empty stack). With the stack `["c", "b", "a"]` (`"a"` on top):
//!
//! ```ignore
//! fill = PUSH("c") ~ PUSH("b") ~ PUSH("a")
//! v = { PEEK_ALL } = { "a" ~ "b" ~ "c" } // top to bottom
//! w = { PEEK[..] } = { "c" ~ "b" ~ "a" } // bottom to top
//! x = { PEEK[1..2] } = { PEEK[1..-1] } = { "b" }
//! y = { PEEK[..-2] } = { PEEK[0..1] } = { "a" }
//! z = { PEEK[1..] } = { PEEK[-2..3] } = { "c" ~ "b" }
//! n = { PEEK[2..-2] } = { PEEK[2..1] } = { "" }
//! ```
//!
//! For historical reasons, `PEEK_ALL` matches from top to bottom, while `PEEK[start..end]` matches
//! from bottom to top. There is currently no syntax to match a slice of the stack top to bottom.
//!
//! ## `Rule`
//!
//! All rules defined or used in the grammar populate a generated `enum` called `Rule`. This
//! implements `pest`'s `RuleType` and can be used throughout the API.
//!
//! ## `Built-in rules`
//!
//! Pest also comes with a number of built-in rules for convenience. They are:
//!
//! * `ASCII_DIGIT` - matches a numeric character from 0..9
//! * `ASCII_NONZERO_DIGIT` - matches a numeric character from 1..9
//! * `ASCII_BIN_DIGIT` - matches a numeric character from 0..1
//! * `ASCII_OCT_DIGIT` - matches a numeric character from 0..7
//! * `ASCII_HEX_DIGIT` - matches a numeric character from 0..9 or a..f or A..F
//! * `ASCII_ALPHA_LOWER` - matches a character from a..z
//! * `ASCII_ALPHA_UPPER` - matches a character from A..Z
//! * `ASCII_ALPHA` - matches a character from a..z or A..Z
//! * `ASCII_ALPHANUMERIC` - matches a character from a..z or A..Z or 0..9
//! * `ASCII` - matches a character from \x00..\x7f
//! * `NEWLINE` - matches either "\n" or "\r\n" or "\r"
use proc_macro::TokenStream;
/// The main method that's called by the proc macro
/// (a wrapper around `pest_generator::derive_parser`)
#[proc_macro_derive(Parser, attributes(grammar, grammar_inline))]
pub fn derive_parser(input: TokenStream) -> TokenStream {
pest_generator::derive_parser(input.into(), true).into()
}

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{"name":"pest_derive","vers":"2.8.6","deps":[{"name":"pest","req":"^2.8.6","features":[],"optional":false,"default_features":false,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"pest_generator","req":"^2.8.6","features":[],"optional":false,"default_features":false,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false}],"features":{"default":["std"],"grammar-extras":["pest_generator/grammar-extras"],"not-bootstrap-in-src":["pest_generator/not-bootstrap-in-src"],"std":["pest/std","pest_generator/std"]},"features2":null,"cksum":"72c164985c499a4224a5cf02bbdaf6458b0a67b918e253be22311439a9414c16","yanked":null,"links":null,"rust_version":null,"v":2}

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// 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.
string = { "abc" }
insensitive = { ^"abc" }
range = { '0'..'9' }
ident = { string }
pos_pred = { &string }
neg_pred = { !string }
double_neg_pred = { !!string }
sequence = !{ string ~ string }
sequence_compound = ${ string ~ string }
sequence_atomic = @{ string ~ string }
sequence_non_atomic = @{ sequence }
sequence_atomic_compound = @{ sequence_compound }
sequence_nested = { string ~ string }
sequence_compound_nested = ${ sequence_nested }
node_tag = { #string = string }
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 = { SOI ~ string }
repeat_mutate_stack = { (PUSH('a'..'c') ~ ",")* ~ POP ~ POP ~ POP }
repeat_mutate_stack_pop_all = { (PUSH('a'..'c') ~ ",")* ~ POP_ALL }
will_fail = { repeat_mutate_stack_pop_all ~ "FAIL" }
stack_resume_after_fail = { will_fail | repeat_mutate_stack_pop_all }
peek_ = { PUSH(range) ~ PUSH(range) ~ PEEK ~ PEEK }
peek_all = { PUSH(range) ~ PUSH(range) ~ PEEK_ALL }
peek_slice_23 = { PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PUSH(range) ~ PEEK[1..-2] }
pop_ = { PUSH(range) ~ PUSH(range) ~ POP ~ POP }
pop_all = { PUSH(range) ~ PUSH(range) ~ POP_ALL }
pop_fail = { PUSH(range) ~ !POP ~ range ~ POP }
checkpoint_restore = ${
PUSH("") ~ (PUSH("a") ~ "b" ~ POP | DROP ~ "b" | POP ~ "a") ~ EOI
}
ascii_digits = { ASCII_DIGIT+ }
ascii_nonzero_digits = { ASCII_NONZERO_DIGIT+ }
ascii_bin_digits = { ASCII_BIN_DIGIT+ }
ascii_oct_digits = { ASCII_OCT_DIGIT+ }
ascii_hex_digits = { ASCII_HEX_DIGIT+ }
ascii_alpha_lowers = { ASCII_ALPHA_LOWER+ }
ascii_alpha_uppers = { ASCII_ALPHA_UPPER+ }
ascii_alphas = { ASCII_ALPHA+ }
ascii_alphanumerics = { ASCII_ALPHANUMERIC+ }
asciis = { ASCII+ }
newline = { NEWLINE+ }
unicode = { XID_START ~ XID_CONTINUE* }
SYMBOL = { "shadows builtin" }
han = { HAN+ }
hangul = { HANGUL+ }
hiragana = { HIRAGANA+ }
arabic = { ARABIC+ }
emoji = { EMOJI+ }
WHITESPACE = _{ " " }
COMMENT = _{ "$"+ }
// 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" }
*/

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// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
use alloc::{format, vec::Vec};
#[macro_use]
extern crate pest;
#[macro_use]
extern crate pest_derive;
#[derive(Parser)]
#[grammar = "tests/grammar.pest"]
struct GrammarParser;
#[test]
fn string() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::string,
tokens: [
string(0, 3)
]
};
}
#[test]
fn insensitive() {
parses_to! {
parser: GrammarParser,
input: "aBC",
rule: Rule::insensitive,
tokens: [
insensitive(0, 3)
]
};
}
#[test]
fn range() {
parses_to! {
parser: GrammarParser,
input: "6",
rule: Rule::range,
tokens: [
range(0, 1)
]
};
}
#[test]
fn ident() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::ident,
tokens: [
ident(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn pos_pred() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::pos_pred,
tokens: [
pos_pred(0, 0)
]
};
}
#[test]
fn neg_pred() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::neg_pred,
tokens: [
neg_pred(0, 0)
]
};
}
#[test]
fn double_neg_pred() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::double_neg_pred,
tokens: [
double_neg_pred(0, 0)
]
};
}
#[test]
fn sequence() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::sequence,
tokens: [
sequence(0, 9, [
string(0, 3),
string(6, 9)
])
]
};
}
#[test]
fn sequence_compound() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::sequence_compound,
tokens: [
sequence_compound(0, 6, [
string(0, 3),
string(3, 6)
])
]
};
}
#[test]
fn sequence_atomic() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::sequence_atomic,
tokens: [
sequence_atomic(0, 6)
]
};
}
#[test]
fn sequence_non_atomic() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::sequence_non_atomic,
tokens: [
sequence_non_atomic(0, 9, [
sequence(0, 9, [
string(0, 3),
string(6, 9)
])
])
]
};
}
#[test]
#[should_panic]
fn sequence_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::sequence_atomic,
tokens: []
};
}
#[test]
fn sequence_atomic_compound() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::sequence_atomic_compound,
tokens: [
sequence_atomic_compound(0, 6, [
sequence_compound(0, 6, [
string(0, 3),
string(3, 6)
])
])
]
};
}
#[test]
fn sequence_compound_nested() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::sequence_compound_nested,
tokens: [
sequence_compound_nested(0, 6, [
sequence_nested(0, 6, [
string(0, 3),
string(3, 6)
])
])
]
};
}
#[test]
#[should_panic]
fn sequence_compound_nested_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::sequence_compound_nested,
tokens: []
};
}
#[test]
fn choice_string() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::choice,
tokens: [
choice(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn choice_range() {
parses_to! {
parser: GrammarParser,
input: "0",
rule: Rule::choice,
tokens: [
choice(0, 1, [
range(0, 1)
])
]
};
}
#[test]
fn choice_prefix() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::choice_prefix,
tokens: [
choice_prefix(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn node_tag() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::node_tag,
tokens: [
node_tag(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn optional_string() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::optional,
tokens: [
optional(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn optional_empty() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::optional,
tokens: [
optional(0, 0)
]
};
}
#[test]
fn repeat_empty() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::repeat,
tokens: [
repeat(0, 0)
]
};
}
#[test]
fn repeat_strings() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat,
tokens: [
repeat(0, 9, [
string(0, 3),
string(6, 9)
])
]
};
}
#[test]
fn repeat_atomic_empty() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::repeat_atomic,
tokens: [
repeat_atomic(0, 0)
]
};
}
#[test]
fn repeat_atomic_strings() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::repeat_atomic,
tokens: [
repeat_atomic(0, 6)
]
};
}
#[test]
#[should_panic]
fn repeat_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_atomic,
tokens: []
};
}
#[test]
#[should_panic]
fn repeat_once_empty() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::repeat_once,
tokens: []
};
}
#[test]
fn repeat_once_strings() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_once,
tokens: [
repeat_once(0, 9, [
string(0, 3),
string(6, 9)
])
]
};
}
#[test]
#[should_panic]
fn repeat_once_atomic_empty() {
parses_to! {
parser: GrammarParser,
input: "",
rule: Rule::repeat_once_atomic,
tokens: []
};
}
#[test]
fn repeat_once_atomic_strings() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::repeat_once_atomic,
tokens: [
repeat_once_atomic(0, 6)
]
};
}
#[test]
#[should_panic]
fn repeat_once_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_once_atomic,
tokens: []
};
}
#[test]
fn repeat_min_max_twice() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_min_max,
tokens: [
repeat_min_max(0, 7, [
string(0, 3),
string(4, 7)
])
]
};
}
#[test]
fn repeat_min_max_thrice() {
parses_to! {
parser: GrammarParser,
input: "abc abc abc",
rule: Rule::repeat_min_max,
tokens: [
repeat_min_max(0, 11, [
string(0, 3),
string(4, 7),
string(8, 11)
])
]
};
}
#[test]
fn repeat_min_max_atomic_twice() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::repeat_min_max_atomic,
tokens: [
repeat_min_max_atomic(0, 6)
]
};
}
#[test]
fn repeat_min_max_atomic_thrice() {
parses_to! {
parser: GrammarParser,
input: "abcabcabc",
rule: Rule::repeat_min_max_atomic,
tokens: [
repeat_min_max_atomic(0, 9)
]
};
}
#[test]
#[should_panic]
fn repeat_min_max_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_min_max_atomic,
tokens: []
};
}
#[test]
fn repeat_exact() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_exact,
tokens: [
repeat_exact(0, 7, [
string(0, 3),
string(4, 7)
])
]
};
}
#[test]
#[should_panic]
fn repeat_min_once() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::repeat_min,
tokens: []
};
}
#[test]
fn repeat_min_twice() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_min,
tokens: [
repeat_min(0, 7, [
string(0, 3),
string(4, 7)
])
]
};
}
#[test]
fn repeat_min_thrice() {
parses_to! {
parser: GrammarParser,
input: "abc abc abc",
rule: Rule::repeat_min,
tokens: [
repeat_min(0, 12, [
string(0, 3),
string(4, 7),
string(9, 12)
])
]
};
}
#[test]
#[should_panic]
fn repeat_min_atomic_once() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::repeat_min_atomic,
tokens: []
};
}
#[test]
fn repeat_min_atomic_twice() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::repeat_min_atomic,
tokens: [
repeat_min_atomic(0, 6)
]
};
}
#[test]
fn repeat_min_atomic_thrice() {
parses_to! {
parser: GrammarParser,
input: "abcabcabc",
rule: Rule::repeat_min_atomic,
tokens: [
repeat_min_atomic(0, 9)
]
};
}
#[test]
#[should_panic]
fn repeat_min_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_min_atomic,
tokens: []
};
}
#[test]
fn repeat_max_once() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::repeat_max,
tokens: [
repeat_max(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn repeat_max_twice() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_max,
tokens: [
repeat_max(0, 7, [
string(0, 3),
string(4, 7)
])
]
};
}
#[test]
#[should_panic]
fn repeat_max_thrice() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_max,
tokens: []
};
}
#[test]
fn repeat_max_atomic_once() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::repeat_max_atomic,
tokens: [
repeat_max_atomic(0, 3)
]
};
}
#[test]
fn repeat_max_atomic_twice() {
parses_to! {
parser: GrammarParser,
input: "abcabc",
rule: Rule::repeat_max_atomic,
tokens: [
repeat_max_atomic(0, 6)
]
};
}
#[test]
#[should_panic]
fn repeat_max_atomic_thrice() {
parses_to! {
parser: GrammarParser,
input: "abcabcabc",
rule: Rule::repeat_max_atomic,
tokens: []
};
}
#[test]
#[should_panic]
fn repeat_max_atomic_space() {
parses_to! {
parser: GrammarParser,
input: "abc abc",
rule: Rule::repeat_max_atomic,
tokens: []
};
}
#[test]
fn repeat_comment() {
parses_to! {
parser: GrammarParser,
input: "abc$$$ $$$abc",
rule: Rule::repeat_once,
tokens: [
repeat_once(0, 13, [
string(0, 3),
string(10, 13)
])
]
};
}
#[test]
fn soi_at_start() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::soi_at_start,
tokens: [
soi_at_start(0, 3, [
string(0, 3)
])
]
};
}
#[test]
fn peek() {
parses_to! {
parser: GrammarParser,
input: "0111",
rule: Rule::peek_,
tokens: [
peek_(0, 4, [
range(0, 1),
range(1, 2)
])
]
};
}
#[test]
fn peek_all() {
parses_to! {
parser: GrammarParser,
input: "0110",
rule: Rule::peek_all,
tokens: [
peek_all(0, 4, [
range(0, 1),
range(1, 2)
])
]
};
}
#[test]
fn peek_slice_23() {
parses_to! {
parser: GrammarParser,
input: "0123412",
rule: Rule::peek_slice_23,
tokens: [
peek_slice_23(0, 7, [
range(0, 1),
range(1, 2),
range(2, 3),
range(3, 4),
range(4, 5),
])
]
};
}
#[test]
fn pop() {
parses_to! {
parser: GrammarParser,
input: "0110",
rule: Rule::pop_,
tokens: [
pop_(0, 4, [
range(0, 1),
range(1, 2)
])
]
};
}
#[test]
fn pop_all() {
parses_to! {
parser: GrammarParser,
input: "0110",
rule: Rule::pop_all,
tokens: [
pop_all(0, 4, [
range(0, 1),
range(1, 2)
])
]
};
}
#[test]
fn pop_fail() {
parses_to! {
parser: GrammarParser,
input: "010",
rule: Rule::pop_fail,
tokens: [
pop_fail(0, 3, [
range(0, 1),
range(1, 2)
])
]
};
}
#[test]
fn repeat_mutate_stack() {
parses_to! {
parser: GrammarParser,
input: "a,b,c,cba",
rule: Rule::repeat_mutate_stack,
tokens: [
repeat_mutate_stack(0, 9)
]
};
}
#[test]
fn stack_resume_after_fail() {
parses_to! {
parser: GrammarParser,
input: "a,b,c,cba",
rule: Rule::stack_resume_after_fail,
tokens: [
stack_resume_after_fail(0, 9, [
repeat_mutate_stack_pop_all(0, 9)
])
]
};
}
#[test]
fn checkpoint_restore() {
parses_to! {
parser: GrammarParser,
input: "a",
rule: Rule::checkpoint_restore,
tokens: [
checkpoint_restore(0, 1, [EOI(1, 1)])
]
};
}
#[test]
fn ascii_digits() {
parses_to! {
parser: GrammarParser,
input: "6",
rule: Rule::ascii_digits,
tokens: [
ascii_digits(0, 1)
]
};
}
#[test]
fn ascii_nonzero_digits() {
parses_to! {
parser: GrammarParser,
input: "5",
rule: Rule::ascii_nonzero_digits,
tokens: [
ascii_nonzero_digits(0, 1)
]
};
}
#[test]
fn ascii_bin_digits() {
parses_to! {
parser: GrammarParser,
input: "1",
rule: Rule::ascii_bin_digits,
tokens: [
ascii_bin_digits(0, 1)
]
};
}
#[test]
fn ascii_oct_digits() {
parses_to! {
parser: GrammarParser,
input: "3",
rule: Rule::ascii_oct_digits,
tokens: [
ascii_oct_digits(0, 1)
]
};
}
#[test]
fn ascii_hex_digits() {
parses_to! {
parser: GrammarParser,
input: "6bC",
rule: Rule::ascii_hex_digits,
tokens: [
ascii_hex_digits(0, 3)
]
};
}
#[test]
fn ascii_alpha_lowers() {
parses_to! {
parser: GrammarParser,
input: "a",
rule: Rule::ascii_alpha_lowers,
tokens: [
ascii_alpha_lowers(0, 1)
]
};
}
#[test]
fn ascii_alpha_uppers() {
parses_to! {
parser: GrammarParser,
input: "K",
rule: Rule::ascii_alpha_uppers,
tokens: [
ascii_alpha_uppers(0, 1)
]
};
}
#[test]
fn ascii_alphas() {
parses_to! {
parser: GrammarParser,
input: "wF",
rule: Rule::ascii_alphas,
tokens: [
ascii_alphas(0, 2)
]
};
}
#[test]
fn ascii_alphanumerics() {
parses_to! {
parser: GrammarParser,
input: "4jU",
rule: Rule::ascii_alphanumerics,
tokens: [
ascii_alphanumerics(0, 3)
]
};
}
#[test]
fn asciis() {
parses_to! {
parser: GrammarParser,
input: "x02",
rule: Rule::asciis,
tokens: [
asciis(0, 3)
]
};
}
#[test]
fn newline() {
parses_to! {
parser: GrammarParser,
input: "\n\r\n\r",
rule: Rule::newline,
tokens: [
newline(0, 4)
]
};
}
#[test]
fn unicode() {
parses_to! {
parser: GrammarParser,
input: "نامهای",
rule: Rule::unicode,
tokens: [
unicode(0, 12)
]
}
}
#[test]
fn shadowing() {
parses_to! {
parser: GrammarParser,
input: "shadows builtin",
rule: Rule::SYMBOL,
tokens: [
SYMBOL(0, 15)
]
}
}

30
vendor/pest_derive/tests/grammar_inline.rs vendored Normal file
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@@ -0,0 +1,30 @@
// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
use alloc::{format, vec::Vec};
#[macro_use]
extern crate pest;
#[macro_use]
extern crate pest_derive;
#[derive(Parser)]
#[grammar_inline = "string = { \"abc\" }"]
struct GrammarParser;
#[test]
fn inline_string() {
parses_to! {
parser: GrammarParser,
input: "abc",
rule: Rule::string,
tokens: [
string(0, 3)
]
};
}

14
vendor/pest_derive/tests/implicit.pest vendored Normal file
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@@ -0,0 +1,14 @@
program = _{ SOI ~ implicit ~ EOI }
implicit= ${ #head = or ~ #tail = (WHITESPACE+ ~ or)* }
or = !{ #more_and = and ~ (or_op ~ and)+ | #one_and = and }
and = { #more_comp = comp ~ (and_op ~ comp)+ | #one_comp = comp }
comp = { #more_array = array ~ eq_op ~ array | #one_array = array }
array = ${ term }
term = _{ ASCII_ALPHANUMERIC+ }
or_op = { "||" }
and_op = { "&&" }
eq_op = { "=" }
WHITESPACE = _{ " " | "\t" | NEWLINE }

46
vendor/pest_derive/tests/implicit.rs vendored Normal file
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// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
extern crate pest;
extern crate pest_derive;
#[cfg(feature = "grammar-extras")]
use pest::Parser;
use pest_derive::Parser;
#[derive(Parser)]
#[grammar = "../tests/implicit.pest"]
struct TestImplicitParser;
#[test]
#[cfg(feature = "grammar-extras")]
fn test_implicit_whitespace() {
// this failed to parse due to a bug in the optimizer
// see: https://github.com/pest-parser/pest/issues/762#issuecomment-1375374868
let successful_parse = TestImplicitParser::parse(Rule::program, "a a");
assert!(successful_parse.is_ok());
// dbg!(&successful_parse);
let pairs = successful_parse.unwrap();
assert!(pairs.find_first_tagged("head").is_some());
assert!(pairs.find_first_tagged("tail").is_some());
assert!(pairs.find_first_tagged("more_and").is_none());
assert!(pairs.find_first_tagged("more_comp").is_none());
assert!(pairs.find_first_tagged("more_array").is_none());
assert_eq!(pairs.clone().find_tagged("one_and").count(), 2);
assert_eq!(pairs.clone().find_tagged("one_comp").count(), 2);
assert_eq!(pairs.find_tagged("one_array").count(), 2);
}
#[test]
#[cfg(feature = "grammar-extras")]
fn test_implicit_whitespace_multitag() {
let successful_parse = TestImplicitParser::parse(Rule::program, "a a a");
assert!(successful_parse.is_ok());
let pairs = successful_parse.unwrap();
assert_eq!(pairs.clone().find_tagged("tail").count(), 2);
}

18
vendor/pest_derive/tests/lists.pest vendored Normal file
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// 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.
item = { (!"\n" ~ ANY)* }
lists = _{ lines ~ EOI }
lines = _{ top_first ~ ("\n" ~ top_continue)* }
top_first = _{ "- " ~ item ~ ("\n" ~ children)? }
top_continue = _{ PEEK_ALL ~ "- " ~ item ~ ("\n" ~ children)? }
indentation = _{ (" " | "\t")+ }
children = { PEEK_ALL ~ PUSH(indentation) ~ lines ~ DROP }

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vendor/pest_derive/tests/lists.rs vendored Normal file
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// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
use alloc::{format, vec::Vec};
#[macro_use]
extern crate pest;
#[macro_use]
extern crate pest_derive;
#[derive(Parser)]
#[grammar = "../tests/lists.pest"]
struct ListsParser;
#[test]
fn item() {
parses_to! {
parser: ListsParser,
input: "- a",
rule: Rule::lists,
tokens: [
item(2, 3)
]
};
}
#[test]
fn items() {
parses_to! {
parser: ListsParser,
input: "- a\n- b",
rule: Rule::lists,
tokens: [
item(2, 3),
item(6, 7)
]
};
}
#[test]
fn children() {
parses_to! {
parser: ListsParser,
input: " - b",
rule: Rule::children,
tokens: [
children(0, 5, [
item(4, 5)
])
]
};
}
#[test]
fn nested_item() {
parses_to! {
parser: ListsParser,
input: "- a\n - b",
rule: Rule::lists,
tokens: [
item(2, 3),
children(4, 9, [
item(8, 9)
])
]
};
}
#[test]
fn nested_items() {
parses_to! {
parser: ListsParser,
input: "- a\n - b\n - c",
rule: Rule::lists,
tokens: [
item(2, 3),
children(4, 15, [
item(8, 9),
item(14, 15)
])
]
};
}
#[test]
fn nested_two_levels() {
parses_to! {
parser: ListsParser,
input: "- a\n - b\n - c",
rule: Rule::lists,
tokens: [
item(2, 3),
children(4, 17, [
item(8, 9),
children(10, 17, [
item(16, 17)
])
])
]
};
}
#[test]
fn nested_then_not() {
parses_to! {
parser: ListsParser,
input: "- a\n - b\n- c",
rule: Rule::lists,
tokens: [
item(2, 3),
children(4, 9, [
item(8, 9)
]),
item(12, 13)
]
};
}

5
vendor/pest_derive/tests/oneormore.pest vendored Normal file
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@@ -0,0 +1,5 @@
WHITESPACE = _{ " " | "\r" | "\n" | "\t" }
identifier = { (ASCII_ALPHA | "_")+ }
assign = { identifier ~ "<-" ~ identifier }

29
vendor/pest_derive/tests/oneormore.rs vendored Normal file
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#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
#[cfg(not(feature = "std"))]
use alloc::{format, vec::Vec};
#[cfg(feature = "grammar-extras")]
use pest::Parser;
use pest_derive::Parser;
#[derive(Parser)]
#[grammar = "../tests/oneormore.pest"]
pub struct OneOrMoreParser;
#[test]
#[cfg(feature = "grammar-extras")]
pub fn test_one_or_more() {
let result = OneOrMoreParser::parse(Rule::assign, "k <- b\n");
assert!(result.is_ok());
let mut pairs = result.unwrap();
let pair = pairs.next().unwrap();
assert_eq!(pair.as_rule(), Rule::assign);
let mut inner = pair.into_inner();
let lhs = inner.next().unwrap();
assert_eq!(lhs.as_rule(), Rule::identifier);
assert_eq!(lhs.as_str(), "k");
let rhs = inner.next().unwrap();
assert_eq!(rhs.as_rule(), Rule::identifier);
assert_eq!(rhs.as_str(), "b");
}

8
vendor/pest_derive/tests/opt.pest vendored Normal file
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@@ -0,0 +1,8 @@
expr = {
SOI ~
#prefix=(STAR)? ~ #suffix=DOT?
~ EOI
}
STAR={"*"}
DOT={"."}

42
vendor/pest_derive/tests/opt.rs vendored Normal file
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// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
extern crate pest;
extern crate pest_derive;
#[cfg(feature = "grammar-extras")]
use pest::Parser;
use pest_derive::Parser;
#[derive(Parser)]
#[grammar = "../tests/opt.pest"]
struct TestOptParser;
#[test]
#[cfg(feature = "grammar-extras")]
fn test_opt_tag() {
let successful_parse = TestOptParser::parse(Rule::expr, "*");
assert!(successful_parse.is_ok());
let pairs = successful_parse.unwrap();
assert!(pairs.find_first_tagged("prefix").is_some());
assert!(pairs.find_first_tagged("suffix").is_none());
// Test with no STAR or DOT
let parse_no_components = TestOptParser::parse(Rule::expr, "");
assert!(parse_no_components.is_ok());
let pairs_no_components = parse_no_components.unwrap();
assert!(pairs_no_components.find_first_tagged("prefix").is_none());
assert!(pairs_no_components.find_first_tagged("suffix").is_none());
// Test with only DOT
let parse_only_dot = TestOptParser::parse(Rule::expr, ".");
assert!(parse_only_dot.is_ok());
let pairs_only_dot = parse_only_dot.unwrap();
assert!(pairs_only_dot.find_first_tagged("prefix").is_none());
assert!(pairs_only_dot.find_first_tagged("suffix").is_some());
}

27
vendor/pest_derive/tests/reporting.pest vendored Normal file
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// 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.
a = { "a" }
b = { "b" }
c = { "c" }
d = { ANY }
choices = _{ a | b | c }
choices_no_progress = { a | b | c }
choices_a_progress = { a ~ a | b | c }
choices_b_progress = { a | b ~ b | c }
level1 = _{ level2 }
level2 = _{ a | b | c }
negative = _{ !d }
negative_match = _{ !a ~ b }
mixed = _{ !d | a }
mixed_progress = _{ (!d | a | b) ~ a }

129
vendor/pest_derive/tests/reporting.rs vendored Normal file
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// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
use alloc::vec;
#[macro_use]
extern crate pest;
#[macro_use]
extern crate pest_derive;
#[derive(Parser)]
#[grammar = "../tests/reporting.pest"]
struct ReportingParser;
#[test]
fn choices() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::choices,
positives: vec![Rule::a, Rule::b, Rule::c],
negatives: vec![],
pos: 0
};
}
#[test]
fn choices_no_progress() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::choices_no_progress,
positives: vec![Rule::choices_no_progress],
negatives: vec![],
pos: 0
};
}
#[test]
fn choices_a_progress() {
fails_with! {
parser: ReportingParser,
input: "a",
rule: Rule::choices_a_progress,
positives: vec![Rule::a],
negatives: vec![],
pos: 1
};
}
#[test]
fn choices_b_progress() {
fails_with! {
parser: ReportingParser,
input: "b",
rule: Rule::choices_b_progress,
positives: vec![Rule::b],
negatives: vec![],
pos: 1
};
}
#[test]
fn nested() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::level1,
positives: vec![Rule::a, Rule::b, Rule::c],
negatives: vec![],
pos: 0
};
}
#[test]
fn negative() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::negative,
positives: vec![],
negatives: vec![Rule::d],
pos: 0
};
}
#[test]
fn negative_match() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::negative_match,
positives: vec![Rule::b],
negatives: vec![],
pos: 0
};
}
#[test]
fn mixed() {
fails_with! {
parser: ReportingParser,
input: "x",
rule: Rule::mixed,
positives: vec![Rule::a],
negatives: vec![Rule::d],
pos: 0
};
}
#[test]
fn mixed_progress() {
fails_with! {
parser: ReportingParser,
input: "b",
rule: Rule::mixed_progress,
positives: vec![Rule::a],
negatives: vec![],
pos: 1
};
}

9
vendor/pest_derive/tests/surround.pest vendored Normal file
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Quote = _{ _QuoteStart ~ QuoteChars ~ _QuoteEnd }
_QuoteStart = _{
( "(" ~ PUSH_LITERAL(")") )
| ( "<" ~ PUSH_LITERAL(">") )
}
_QuoteEnd = _{ POP }
QuoteChars = { (!PEEK ~ ANY)* }

74
vendor/pest_derive/tests/surround.rs vendored Normal file
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// pest. The Elegant Parser
//
// 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.
#![cfg_attr(not(feature = "std"), no_std)]
extern crate alloc;
#[cfg(not(feature = "std"))]
use alloc::{format, vec, vec::Vec};
#[macro_use]
extern crate pest;
extern crate pest_derive;
#[cfg(feature = "grammar-extras")]
use pest_derive::Parser;
/// Surround-string parser.
///
/// This is a simple grammar of string parsing, where the strings end with a different delimiter char than what they
/// start with. The allowable forms are:
///
/// ```text
/// (foo)
/// <bar>
/// ```
///
/// To keep things simple, strings do not support any escape sequences.
#[derive(Parser)]
#[grammar = "../tests/surround.pest"]
#[cfg(feature = "grammar-extras")]
pub struct SurroundParser;
#[test]
#[cfg(feature = "grammar-extras")]
fn surround_parenthesis() {
parses_to! {
parser: SurroundParser,
input: "(hello world)",
rule: Rule::Quote,
tokens: [
QuoteChars(1, 12)
]
}
}
#[test]
#[cfg(feature = "grammar-extras")]
fn surround_angle_brackets() {
parses_to! {
parser: SurroundParser,
input: "<hello world>",
rule: Rule::Quote,
tokens: [
QuoteChars(1, 12)
]
}
}
#[test]
#[cfg(feature = "grammar-extras")]
fn start_with_one_end_with_other() {
fails_with! {
parser: SurroundParser,
input: "(hello world>",
rule: Rule::Quote,
positives: vec![],
negatives: vec![],
pos: 0
}
}