mirror of https://github.com/rwf2/Rocket.git
32 lines
727 B
Rust
32 lines
727 B
Rust
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//! Extensions to `syn` types.
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use derive_utils::syn;
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use proc_macro::Diagnostic;
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pub fn syn_to_diag(error: syn::parse::Error) -> Diagnostic {
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error.span().unstable().error(error.to_string())
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}
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pub trait IdentExt {
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fn prepend(&self, string: &str) -> syn::Ident;
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}
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impl IdentExt for syn::Ident {
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fn prepend(&self, string: &str) -> syn::Ident {
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syn::Ident::new(&format!("{}{}", string, self), self.span())
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}
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}
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pub trait ReturnTypeExt {
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fn ty(&self) -> Option<&syn::Type>;
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}
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impl ReturnTypeExt for syn::ReturnType {
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fn ty(&self) -> Option<&syn::Type> {
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match self {
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syn::ReturnType::Default => None,
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syn::ReturnType::Type(_, ty) => Some(ty),
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}
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}
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}
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