bevy/crates/bevy_macro_utils/src/attrs.rs
张林伟 0d2cdb450d Fix beta clippy lints (#7154)
# Objective

- When I run `cargo run -p ci` for my pr locally using latest beta toolchain, the ci failed due to [uninlined_format_args](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args) and [needless_lifetimes](https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes) lints

## Solution

- Fix lints according to clippy suggestions.
2023-01-11 09:51:22 +00:00

42 lines
1.2 KiB
Rust

use syn::DeriveInput;
use crate::symbol::Symbol;
pub fn parse_attrs(ast: &DeriveInput, attr_name: Symbol) -> syn::Result<Vec<syn::NestedMeta>> {
let mut list = Vec::new();
for attr in ast.attrs.iter().filter(|a| a.path == attr_name) {
match attr.parse_meta()? {
syn::Meta::List(meta) => list.extend(meta.nested.into_iter()),
other => {
return Err(syn::Error::new_spanned(
other,
format!("expected #[{attr_name}(...)]"),
))
}
}
}
Ok(list)
}
pub fn get_lit_str(attr_name: Symbol, lit: &syn::Lit) -> syn::Result<&syn::LitStr> {
if let syn::Lit::Str(lit) = lit {
Ok(lit)
} else {
Err(syn::Error::new_spanned(
lit,
format!("expected {attr_name} attribute to be a string: `{attr_name} = \"...\"`"),
))
}
}
pub fn get_lit_bool(attr_name: Symbol, lit: &syn::Lit) -> syn::Result<bool> {
if let syn::Lit::Bool(lit) = lit {
Ok(lit.value())
} else {
Err(syn::Error::new_spanned(
lit,
format!("expected {attr_name} attribute to be a bool value, `true` or `false`: `{attr_name} = ...`"),
))
}
}