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Use more spans for error messages

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This commit is contained in:
hcpl
2018-11-17 18:13:36 +02:00
parent 58b3af4c29
commit 8f3f073017
3 changed files with 43 additions and 20 deletions
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serde_derive/src/lib.rs
+5 -4
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@@ -62,6 +62,7 @@ mod internals;
use proc_macro::TokenStream;
use syn::DeriveInput;
use syn::spanned::Spanned;
#[macro_use]
mod bound;
@@ -77,7 +78,7 @@ 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(compile_error)
.unwrap_or_else(|message| compile_error(input.span(), message))
.into()
}
@@ -85,12 +86,12 @@ 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(compile_error)
.unwrap_or_else(|message| compile_error(input.span(), message))
.into()
}
fn compile_error(message: String) -> proc_macro2::TokenStream {
quote! {
fn compile_error(span: proc_macro2::Span, message: String) -> proc_macro2::TokenStream {
quote_spanned! {span=>
compile_error!(#message);
}
}