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chore: checkpoint before Python removal

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{
"git": {
"sha1": "79dd30d11aab6f0fba3cd79bd48f456209b966b3"
},
"path_in_vcs": "generator"
}

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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_generator"
version = "2.8.6"
authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
build = false
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "pest code generator"
homepage = "https://pest.rs/"
documentation = "https://docs.rs/pest"
readme = "_README.md"
keywords = [
"pest",
"generator",
]
categories = ["parsing"]
license = "MIT OR Apache-2.0"
repository = "https://github.com/pest-parser/pest"
[features]
default = ["std"]
export-internal = []
grammar-extras = ["pest_meta/grammar-extras"]
not-bootstrap-in-src = ["pest_meta/not-bootstrap-in-src"]
std = ["pest/std"]
[lib]
name = "pest_generator"
path = "src/lib.rs"
[dependencies.pest]
version = "2.8.6"
default-features = false
[dependencies.pest_meta]
version = "2.8.6"
[dependencies.proc-macro2]
version = "1.0"
[dependencies.quote]
version = "1.0"
[dependencies.syn]
version = "2.0"

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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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//! Type and helper to collect the gramamr and rule documentation.
use pest::iterators::Pairs;
use pest_meta::parser::Rule;
use std::collections::HashMap;
/// Abstraction for the grammar and rule doc.
#[derive(Debug)]
pub struct DocComment {
/// The grammar documentation is defined at the beginning of a file with //!.
pub grammar_doc: String,
/// HashMap for store all doc_comments for rules.
/// key is rule name, value is doc_comment.
pub line_docs: HashMap<String, String>,
}
/// Consume pairs to matches `Rule::grammar_doc`, `Rule::line_doc` into `DocComment`
///
/// e.g.
///
/// a pest file:
///
/// ```ignore
/// //! This is a grammar doc
/// /// line doc 1
/// /// line doc 2
/// foo = {}
///
/// /// line doc 3
/// bar = {}
/// ```
///
/// Then will get:
///
/// ```ignore
/// grammar_doc = "This is a grammar doc"
/// line_docs = { "foo": "line doc 1\nline doc 2", "bar": "line doc 3" }
/// ```
pub fn consume(pairs: Pairs<'_, Rule>) -> DocComment {
let mut grammar_doc = String::new();
let mut line_docs: HashMap<String, String> = HashMap::new();
let mut line_doc = String::new();
for pair in pairs {
match pair.as_rule() {
Rule::grammar_doc => {
// grammar_doc > inner_doc
let inner_doc = pair.into_inner().next().unwrap();
grammar_doc.push_str(inner_doc.as_str());
grammar_doc.push('\n');
}
Rule::grammar_rule => {
if let Some(inner) = pair.into_inner().next() {
// grammar_rule > line_doc | identifier
match inner.as_rule() {
Rule::line_doc => {
if let Some(inner_doc) = inner.into_inner().next() {
line_doc.push_str(inner_doc.as_str());
line_doc.push('\n');
}
}
Rule::identifier => {
if !line_doc.is_empty() {
let rule_name = inner.as_str().to_owned();
// Remove last \n
line_doc.pop();
line_docs.insert(rule_name, line_doc.clone());
line_doc.clear();
}
}
_ => (),
}
}
}
_ => (),
}
}
if !grammar_doc.is_empty() {
// Remove last \n
grammar_doc.pop();
}
DocComment {
grammar_doc,
line_docs,
}
}
#[cfg(test)]
mod tests {
use std::collections::HashMap;
use pest_meta::parser;
use pest_meta::parser::Rule;
#[test]
fn test_doc_comment() {
let pairs = match parser::parse(Rule::grammar_rules, include_str!("../tests/test.pest")) {
Ok(pairs) => pairs,
Err(_) => panic!("error parsing tests/test.pest"),
};
let doc_comment = super::consume(pairs);
let mut expected = HashMap::new();
expected.insert("foo".to_owned(), "Matches foo str, e.g.: `foo`".to_owned());
expected.insert(
"bar".to_owned(),
"Matches bar str\n\n Indent 2, e.g: `bar` or `foobar`".to_owned(),
);
expected.insert(
"dar".to_owned(),
"Matches dar\n\nMatch dar description\n".to_owned(),
);
assert_eq!(expected, doc_comment.line_docs);
assert_eq!(
"A parser for JSON file.\nAnd this is a example for JSON parser.\n\n indent-4-space\n",
doc_comment.grammar_doc
);
}
#[test]
fn test_empty_grammar_doc() {
assert!(parser::parse(Rule::grammar_rules, "//!").is_ok());
assert!(parser::parse(Rule::grammar_rules, "///").is_ok());
assert!(parser::parse(Rule::grammar_rules, "//").is_ok());
assert!(parser::parse(Rule::grammar_rules, "/// Line Doc").is_ok());
assert!(parser::parse(Rule::grammar_rules, "//! Grammar Doc").is_ok());
assert!(parser::parse(Rule::grammar_rules, "// Comment").is_ok());
}
}

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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)]
#![recursion_limit = "256"]
//! # pest generator
//!
//! This crate generates code from ASTs (which is used in the `pest_derive` crate).
#[macro_use]
extern crate quote;
use std::env;
use std::fs::File;
use std::io::{self, Read};
use std::path::Path;
use generator::generate;
use proc_macro2::TokenStream;
use syn::DeriveInput;
#[macro_use]
mod macros;
#[cfg(feature = "export-internal")]
pub mod docs;
#[cfg(not(feature = "export-internal"))]
mod docs;
#[cfg(feature = "export-internal")]
pub mod generator;
#[cfg(not(feature = "export-internal"))]
mod generator;
#[cfg(feature = "export-internal")]
pub mod parse_derive;
#[cfg(not(feature = "export-internal"))]
mod parse_derive;
use crate::parse_derive::{parse_derive, GrammarSource};
use pest_meta::parser::{self, rename_meta_rule, Rule};
use pest_meta::{optimizer, unwrap_or_report, validator};
/// Processes the derive/proc macro input and generates the corresponding parser based
/// on the parsed grammar. If `include_grammar` is set to true, it'll generate an explicit
/// "include_str" statement (done in pest_derive, but turned off in the local bootstrap).
pub fn derive_parser(input: TokenStream, include_grammar: bool) -> TokenStream {
let ast: DeriveInput = syn::parse2(input).unwrap();
let (parsed_derive, contents) = parse_derive(ast);
// Grammar presented in a view of a string.
let mut data = String::new();
let mut paths = vec![];
for content in contents {
let (_data, _path) = match content {
GrammarSource::File(ref path) => {
let root = env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_| ".".into());
// Check whether we can find a file at the path relative to the CARGO_MANIFEST_DIR
// first.
//
// If we cannot find the expected file over there, fallback to the
// `CARGO_MANIFEST_DIR/src`, which is the old default and kept for convenience
// reasons.
// TODO: This could be refactored once `std::path::absolute()` get's stabilized.
// https://doc.rust-lang.org/std/path/fn.absolute.html
let path = if Path::new(&root).join(path).exists() {
Path::new(&root).join(path)
} else {
Path::new(&root).join("src/").join(path)
};
let file_name = match path.file_name() {
Some(file_name) => file_name,
None => panic!("grammar attribute should point to a file"),
};
let data = match read_file(&path) {
Ok(data) => data,
Err(error) => panic!("error opening {:?}: {}", file_name, error),
};
(data, Some(path.clone()))
}
GrammarSource::Inline(content) => (content, None),
};
data.push_str(&_data);
if let Some(path) = _path {
paths.push(path);
}
}
// `Rule::grammar_rules` is taken from meta/srd/parser.rs.
let pairs = match parser::parse(Rule::grammar_rules, &data) {
Ok(pairs) => pairs,
Err(error) => panic!("error parsing \n{}", error.renamed_rules(rename_meta_rule)),
};
let defaults = unwrap_or_report(validator::validate_pairs(pairs.clone()));
let doc_comment = docs::consume(pairs.clone());
let ast = unwrap_or_report(parser::consume_rules(pairs));
let optimized = optimizer::optimize(ast);
generate(
parsed_derive,
paths,
optimized,
defaults,
&doc_comment,
include_grammar,
)
}
fn read_file<P: AsRef<Path>>(path: P) -> io::Result<String> {
let mut file = File::open(path.as_ref())?;
let mut string = String::new();
file.read_to_string(&mut string)?;
Ok(string)
}
#[cfg(test)]
mod tests {
#[doc = "Matches dar\n\nMatch dar description\n"]
#[test]
fn test_generate_doc() {
let input = quote! {
#[derive(Parser)]
#[non_exhaustive]
#[grammar = "../tests/test.pest"]
pub struct TestParser;
};
let token = super::derive_parser(input, true);
let expected = quote! {
#[doc = "A parser for JSON file.\nAnd this is a example for JSON parser.\n\n indent-4-space\n"]
#[allow(dead_code, non_camel_case_types, clippy::upper_case_acronyms)]
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
#[non_exhaustive]
pub enum Rule {
#[doc = "Matches foo str, e.g.: `foo`"]
r#foo,
#[doc = "Matches bar str\n\n Indent 2, e.g: `bar` or `foobar`"]
r#bar,
r#bar1,
#[doc = "Matches dar\n\nMatch dar description\n"]
r#dar
}
};
assert!(
token.to_string().contains(expected.to_string().as_str()),
"{}\n\nExpected to contains:\n{}",
token,
expected
);
}
}

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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.
macro_rules! insert_builtin {
($builtin: expr, $name: ident, $pattern: expr) => {
$builtin.push((stringify!($name), generate_rule!($name, $pattern)));
};
}
#[cfg(feature = "std")]
macro_rules! generate_rule {
($name: ident, $pattern: expr) => {
quote! {
#[inline]
#[allow(dead_code, non_snake_case, unused_variables)]
pub fn $name(state: ::std::boxed::Box<::pest::ParserState<'_, Rule>>) -> ::pest::ParseResult<::std::boxed::Box<::pest::ParserState<'_, Rule>>> {
$pattern
}
}
}
}
#[cfg(not(feature = "std"))]
macro_rules! generate_rule {
($name: ident, $pattern: expr) => {
quote! {
#[inline]
#[allow(dead_code, non_snake_case, unused_variables)]
pub fn $name(state: ::alloc::boxed::Box<::pest::ParserState<'_, Rule>>) -> ::pest::ParseResult<::alloc::boxed::Box<::pest::ParserState<'_, Rule>>> {
$pattern
}
}
}
}

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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.
//! Types and helpers to parse the input of the derive macro.
use syn::{Attribute, DeriveInput, Expr, ExprLit, Generics, Ident, Lit, Meta};
#[derive(Debug, PartialEq)]
pub(crate) enum GrammarSource {
File(String),
Inline(String),
}
/// Parsed information of the derive and the attributes.
pub struct ParsedDerive {
/// The identifier of the deriving struct, union, or enum.
pub name: Ident,
/// The generics of the deriving struct, union, or enum.
pub generics: Generics,
/// Indicates whether the 'non_exhaustive' attribute is added to the 'Rule' enum.
pub non_exhaustive: bool,
}
pub(crate) fn parse_derive(ast: DeriveInput) -> (ParsedDerive, Vec<GrammarSource>) {
let name = ast.ident;
let generics = ast.generics;
let grammar: Vec<&Attribute> = ast
.attrs
.iter()
.filter(|attr| {
let path = attr.meta.path();
path.is_ident("grammar") || path.is_ident("grammar_inline")
})
.collect();
if grammar.is_empty() {
panic!("a grammar file needs to be provided with the #[grammar = \"PATH\"] or #[grammar_inline = \"GRAMMAR CONTENTS\"] attribute");
}
let mut grammar_sources = Vec::with_capacity(grammar.len());
for attr in grammar {
grammar_sources.push(get_attribute(attr))
}
let non_exhaustive = ast
.attrs
.iter()
.any(|attr| attr.meta.path().is_ident("non_exhaustive"));
(
ParsedDerive {
name,
generics,
non_exhaustive,
},
grammar_sources,
)
}
fn get_attribute(attr: &Attribute) -> GrammarSource {
match &attr.meta {
Meta::NameValue(name_value) => match &name_value.value {
Expr::Lit(ExprLit {
lit: Lit::Str(string),
..
}) => {
if name_value.path.is_ident("grammar") {
GrammarSource::File(string.value())
} else {
GrammarSource::Inline(string.value())
}
}
_ => panic!("grammar attribute must be a string"),
},
_ => panic!("grammar attribute must be of the form `grammar = \"...\"`"),
}
}
#[cfg(test)]
mod tests {
use super::parse_derive;
use super::GrammarSource;
#[test]
fn derive_inline_file() {
let definition = "
#[other_attr]
#[grammar_inline = \"GRAMMAR\"]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
let (_, filenames) = parse_derive(ast);
assert_eq!(filenames, [GrammarSource::Inline("GRAMMAR".to_string())]);
}
#[test]
fn derive_ok() {
let definition = "
#[other_attr]
#[grammar = \"myfile.pest\"]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
let (parsed_derive, filenames) = parse_derive(ast);
assert_eq!(filenames, [GrammarSource::File("myfile.pest".to_string())]);
assert!(!parsed_derive.non_exhaustive);
}
#[test]
fn derive_multiple_grammars() {
let definition = "
#[other_attr]
#[grammar = \"myfile1.pest\"]
#[grammar = \"myfile2.pest\"]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
let (_, filenames) = parse_derive(ast);
assert_eq!(
filenames,
[
GrammarSource::File("myfile1.pest".to_string()),
GrammarSource::File("myfile2.pest".to_string())
]
);
}
#[test]
fn derive_nonexhaustive() {
let definition = "
#[non_exhaustive]
#[grammar = \"myfile.pest\"]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
let (parsed_derive, filenames) = parse_derive(ast);
assert_eq!(filenames, [GrammarSource::File("myfile.pest".to_string())]);
assert!(parsed_derive.non_exhaustive);
}
#[test]
#[should_panic(expected = "grammar attribute must be a string")]
fn derive_wrong_arg() {
let definition = "
#[other_attr]
#[grammar = 1]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
parse_derive(ast);
}
#[test]
#[should_panic(
expected = "a grammar file needs to be provided with the #[grammar = \"PATH\"] or #[grammar_inline = \"GRAMMAR CONTENTS\"] attribute"
)]
fn derive_no_grammar() {
let definition = "
#[other_attr]
pub struct MyParser<'a, T>;
";
let ast = syn::parse_str(definition).unwrap();
parse_derive(ast);
}
}

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{"name":"pest_generator","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_meta","req":"^2.8.6","features":[],"optional":false,"default_features":true,"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":"proc-macro2","req":"^1.0","features":[],"optional":false,"default_features":true,"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":"quote","req":"^1.0","features":[],"optional":false,"default_features":true,"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":"syn","req":"^2.0","features":[],"optional":false,"default_features":true,"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"],"export-internal":[],"grammar-extras":["pest_meta/grammar-extras"],"not-bootstrap-in-src":["pest_meta/not-bootstrap-in-src"],"std":["pest/std"]},"features2":null,"cksum":"927ee0a6d2dbf21e51c6d74e186f36db9651e42167681a1a45cd55c793c41446","yanked":null,"links":null,"rust_version":null,"v":2}

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base = { "base" }

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//! A parser for JSON file.
//! And this is a example for JSON parser.
//!
//! indent-4-space
//!
/// Matches foo str, e.g.: `foo`
foo = { "foo" }
/// Matches bar str
///
/// Indent 2, e.g: `bar` or `foobar`
bar = { "bar" | "foobar" }
bar1 = { "bar1" }
/// Matches dar
///
/// Match dar description
///
dar = { "da" }