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Rollup merge of #108727 - tshepang:example-translatable-diagnostic, r=Nilstrieb

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rustc_expand: make proc-macro derive error translatable

kept this tiny so as to point to it as an example in rustc-dev-guide

`@rustbot` label +A-translation
This commit is contained in:
Dylan DPC 2023-03-04 15:24:40 +05:30 committed by GitHub
commit 0965c7e0a9
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3 changed files with 11 additions and 1 deletions
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3
compiler/rustc_expand/locales/en-US.ftl
View File

@ -133,3 +133,6 @@ expand_trace_macro = trace_macro
expand_proc_macro_panicked =
proc macro panicked
.help = message: {$message}
expand_proc_macro_derive_tokens =
proc-macro derive produced unparseable tokens

7
compiler/rustc_expand/src/errors.rs
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@ -390,3 +390,10 @@ pub(crate) struct ProcMacroPanicked {
pub(crate) struct ProcMacroPanickedHelp {
pub message: String,
}
#[derive(Diagnostic)]
#[diag(expand_proc_macro_derive_tokens)]
pub struct ProcMacroDeriveTokens {
#[primary_span]
pub span: Span,
}

2
compiler/rustc_expand/src/proc_macro.rs
View File

@ -176,7 +176,7 @@ impl MultiItemModifier for DeriveProcMacro {
// fail if there have been errors emitted
if ecx.sess.parse_sess.span_diagnostic.err_count() > error_count_before {
ecx.struct_span_err(span, "proc-macro derive produced unparseable tokens").emit();
ecx.sess.emit_err(errors::ProcMacroDeriveTokens { span });
}
ExpandResult::Ready(items)