1 unstable release
0.1.0 | Apr 17, 2022 |
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#344 in Value formatting
Used in flexgen
21KB
347 lines
use-builder
A crate to build source code use sections by combining multiple (possibly duplicate) use section inputs.
NOTE: This is a fairly specialized crate. The only likely use case is really that of compiling source code snippets into files, like flexgen does.
Usage
[dependencies]
use-builder = "0.1"
Example
use assert_unordered::assert_eq_unordered;
use quote::quote;
use use_builder::{UseBuilder, UseItems};
fn main() {
// #1 - Build a two or more use trees and convert into `UseItems` (wrapped `Vec<ItemUse>`)
let use1 = quote! {
use crate::Test;
use std::error::{Error as StdError};
use std::fmt::Debug;
};
let use2 = quote! {
use syn::ItemUse;
use std::fmt::Display;
use crate::*;
};
let items1: UseItems = syn::parse2(use1).unwrap();
let items2: UseItems = syn::parse2(use2).unwrap();
// #2 - Parse, process, and extract into sections
let builder = UseBuilder::from_uses(vec![items1, items2]);
let (std_use, ext_use, crate_use) = builder.into_items_sections().unwrap();
// #3 - Validate our response matches expectation
let std_expected = quote! {
use std::error::Error as StdError;
use std::fmt::{Debug, Display};
};
let std_expected = syn::parse2::<UseItems>(std_expected).unwrap().into_inner();
let ext_expected = quote! {
use syn::ItemUse;
};
let ext_expected = syn::parse2::<UseItems>(ext_expected).unwrap().into_inner();
let crate_expected = quote! {
use crate::*;
};
let crate_expected = syn::parse2::<UseItems>(crate_expected).unwrap().into_inner();
assert_eq_unordered!(std_expected, std_use);
assert_eq_unordered!(ext_expected, ext_use);
assert_eq_unordered!(crate_expected, crate_use);
}
License
This project is licensed optionally under either:
- Apache License, Version 2.0, (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)
Dependencies
~2.5MB
~51K SLoC