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These match-expressions are implementing unwrap_or_else

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David Tolnay 2018-06-02 22:08:01 -07:00
parent 6d31ec521b
commit 57de28744c
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1 changed files with 12 additions and 8 deletions
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20
serde_derive/src/lib.rs
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@ -29,7 +29,7 @@
feature = "cargo-clippy", feature = "cargo-clippy",
allow( allow(
enum_variant_names, redundant_field_names, too_many_arguments, used_underscore_binding, enum_variant_names, redundant_field_names, too_many_arguments, used_underscore_binding,
cyclomatic_complexity cyclomatic_complexity, needless_pass_by_value
) )
)] )]
// Whitelisted clippy_pedantic lints // Whitelisted clippy_pedantic lints
@ -69,17 +69,21 @@ mod try;
#[proc_macro_derive(Serialize, attributes(serde))] #[proc_macro_derive(Serialize, attributes(serde))]
pub fn derive_serialize(input: TokenStream) -> TokenStream { pub fn derive_serialize(input: TokenStream) -> TokenStream {
let input: DeriveInput = syn::parse(input).unwrap(); let input: DeriveInput = syn::parse(input).unwrap();
match ser::expand_derive_serialize(&input) { ser::expand_derive_serialize(&input)
Ok(expanded) => expanded.into(), .unwrap_or_else(compile_error)
Err(msg) => quote! {compile_error!(#msg);}.into(), .into()
}
} }
#[proc_macro_derive(Deserialize, attributes(serde))] #[proc_macro_derive(Deserialize, attributes(serde))]
pub fn derive_deserialize(input: TokenStream) -> TokenStream { pub fn derive_deserialize(input: TokenStream) -> TokenStream {
let input: DeriveInput = syn::parse(input).unwrap(); let input: DeriveInput = syn::parse(input).unwrap();
match de::expand_derive_deserialize(&input) { de::expand_derive_deserialize(&input)
Ok(expanded) => expanded.into(), .unwrap_or_else(compile_error)
Err(msg) => quote! {compile_error!(#msg);}.into(), .into()
}
fn compile_error(message: String) -> proc_macro2::TokenStream {
quote! {
compile_error!(#message);
} }
} }