improve error message span

Author: msrd0

derive/src/codegen.rs

@@ -1,7 +1,7 @@
 use crate::parser::{ParseData, ParseDataField, TypeOrInline};
 use proc_macro2::TokenStream;
-use quote::quote;
-use syn::LitStr;
+use quote::{quote, quote_spanned};
+use syn::{spanned::Spanned, LitStr};
 
 pub(super) fn gen_doc_option(doc: &[String]) -> TokenStream {
 	let doc = doc.join("\n");
@@ -38,7 +38,7 @@ fn gen_struct(name: Option<&LitStr>, fields: &[ParseDataField]) -> TokenStream {
 		let doc = gen_doc_option(&f.doc);
 		let schema = match &f.ty {
 			TypeOrInline::Type(ty) => {
-				quote!(<#ty as ::openapi_type::OpenapiType>::schema())
+				quote_spanned!(ty.span() => <#ty as ::openapi_type::OpenapiType>::schema())
 			},
 			TypeOrInline::Inline(data) => data.gen_schema()
 		};

tests/fail/enum_with_no_variants.stderr

@@ -1,5 +1,5 @@
 error: #[derive(OpenapiType)] does not support enums with no variants
- --> $DIR/enum_with_no_variants.rs:4:10
+ --> tests/fail/enum_with_no_variants.rs:4:10
   |
 4 | enum Foo {}
   |          ^^

tests/fail/not_openapitype.stderr

@@ -1,12 +1,11 @@
 error[E0277]: the trait bound `Bar: OpenapiType` is not satisfied
-   --> $DIR/not_openapitype.rs:3:10
+   --> tests/fail/not_openapitype.rs:5:7
     |
-3   | #[derive(OpenapiType)]
-    |          ^^^^^^^^^^^ the trait `OpenapiType` is not implemented for `Bar`
+5   |     bar: Bar
+    |          ^^^ the trait `OpenapiType` is not implemented for `Bar`
     |
 note: required by `schema`
-   --> $DIR/lib.rs:146:2
+   --> src/lib.rs
     |
-146 |     fn schema() -> OpenapiSchema;
+    |     fn schema() -> OpenapiSchema;
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-    = note: this error originates in the derive macro `OpenapiType` (in Nightly builds, run with -Z macro-backtrace for more info)

tests/fail/not_openapitype_generics.stderr

@@ -1,5 +1,5 @@
 error[E0599]: the function or associated item `schema` exists for struct `Foo<Bar>`, but its trait bounds were not satisfied
-  --> $DIR/not_openapitype_generics.rs:11:14
+  --> tests/fail/not_openapitype_generics.rs:11:14
    |
 4  | struct Foo<T> {
    | -------------

tests/fail/tuple_struct.stderr

@@ -1,5 +1,5 @@
 error: #[derive(OpenapiType)] does not support tuple structs
- --> $DIR/tuple_struct.rs:4:11
+ --> tests/fail/tuple_struct.rs:4:11
   |
 4 | struct Foo(i64, i64);
   |           ^^^^^^^^^^

tests/fail/tuple_variant.stderr

@@ -1,5 +1,5 @@
 error: #[derive(OpenapiType)] does not support tuple variants
- --> $DIR/tuple_variant.rs:5:6
+ --> tests/fail/tuple_variant.rs:5:6
   |
 5 |     Pair(i64, i64)
   |         ^^^^^^^^^^

tests/fail/union.stderr

@@ -1,5 +1,5 @@
 error: #[derive(OpenapiType)] cannot be used on unions
- --> $DIR/union.rs:4:1
+ --> tests/fail/union.rs:4:1
   |
 4 | union Foo {
   | ^^^^^

tests/fail/unknown_attribute.stderr

@@ -1,5 +1,5 @@
 error: Unexpected token
- --> $DIR/unknown_attribute.rs:4:11
+ --> tests/fail/unknown_attribute.rs:4:11
   |
 4 | #[openapi(pizza)]
   |           ^^^^^