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Improve overall quality of compile_error! errors

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Also updates UI tests.
This commit is contained in:
hcpl
2018-11-29 08:01:17 +02:00
parent 8f3f073017
commit 034db9f20f
69 changed files with 714 additions and 429 deletions
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serde_derive/src/lib.rs
+5 -7
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@@ -62,7 +62,6 @@ mod internals;
use proc_macro::TokenStream;
use syn::DeriveInput;
use syn::spanned::Spanned;
#[macro_use]
mod bound;
@@ -78,7 +77,7 @@ mod try;
pub fn derive_serialize(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
ser::expand_derive_serialize(&input)
.unwrap_or_else(|message| compile_error(input.span(), message))
.unwrap_or_else(to_compile_errors)
.into()
}
@@ -86,12 +85,11 @@ pub fn derive_serialize(input: TokenStream) -> TokenStream {
pub fn derive_deserialize(input: TokenStream) -> TokenStream {
let input = parse_macro_input!(input as DeriveInput);
de::expand_derive_deserialize(&input)
.unwrap_or_else(|message| compile_error(input.span(), message))
.unwrap_or_else(to_compile_errors)
.into()
}
fn compile_error(span: proc_macro2::Span, message: String) -> proc_macro2::TokenStream {
quote_spanned! {span=>
compile_error!(#message);
}
fn to_compile_errors(errors: Vec<syn::Error>) -> proc_macro2::TokenStream {
let compile_errors = errors.iter().map(syn::Error::to_compile_error);
quote!(#(#compile_errors)*)
}