borrowme_macros/
lib.rs

1//! [<img alt="github" src="https://img.shields.io/badge/github-udoprog/borrowme-8da0cb?style=for-the-badge&logo=github" height="20">](https://github.com/udoprog/borrowme)
2//! [<img alt="crates.io" src="https://img.shields.io/crates/v/borrowme-macros.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/borrowme-macros)
3//! [<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-borrowme--macros-66c2a5?style=for-the-badge&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://docs.rs/borrowme-macros)
4
5#![allow(clippy::too_many_arguments)]
6
7mod attr;
8mod ctxt;
9mod implement;
10mod respan;
11
12use ctxt::Ctxt;
13use proc_macro2::Span;
14use syn::spanned::Spanned;
15
16#[proc_macro_attribute]
17pub fn borrowme(
18    attr: proc_macro::TokenStream,
19    item: proc_macro::TokenStream,
20) -> proc_macro::TokenStream {
21    let item = syn::parse_macro_input!(item as syn::Item);
22
23    let attr_list;
24
25    let attr = if !attr.is_empty() {
26        // Synthesize a fake attribute so we can used attribute arguments which
27        // were passed in when parsing arguments.
28        attr_list = [syn::Attribute {
29            pound_token: <syn::Token![#]>::default(),
30            style: syn::AttrStyle::Outer,
31            bracket_token: <syn::token::Bracket>::default(),
32            meta: syn::Meta::List(syn::MetaList {
33                path: syn::Path::from(syn::Ident::new(attr::BORROWME, Span::call_site())),
34                delimiter: syn::MacroDelimiter::Paren(syn::token::Paren::default()),
35                tokens: attr.into(),
36            }),
37        }];
38
39        &attr_list[..]
40    } else {
41        &[]
42    };
43
44    let cx = Ctxt::new(item.span());
45
46    if let Ok(stream) = implement::implement(&cx, attr, item) {
47        if !cx.has_errors() {
48            return stream.into();
49        }
50    }
51
52    cx.into_errors().into()
53}
borrowme_macros/lib.rs

borrowme_macros/
lib.rs
