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Better error recovery in Subdiagnostic derive

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This commit is contained in:
Xiretza 2022-09-12 21:11:49 +02:00
parent e7251cc441
commit 57679fb1c5
1 changed files with 28 additions and 20 deletions
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34
compiler/rustc_macros/src/diagnostics/subdiagnostic.rs
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@ -13,6 +13,7 @@ use std::collections::HashMap;
use syn::{spanned::Spanned, Attribute, Meta, MetaList, MetaNameValue, NestedMeta, Path};
use synstructure::{BindingInfo, Structure, VariantInfo};
use super::error::invalid_attr;
use super::utils::{SpannedOption, SubdiagnosticKind};
/// The central struct for constructing the `add_to_diagnostic` method from an annotated struct.
@ -271,18 +272,18 @@ impl<'a> SubdiagnosticDeriveBuilder<'a> {
"skip_arg" => Ok(quote! {}),
"primary_span" => {
if kind_stats.has_multipart_suggestion {
throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
diag.help(
invalid_attr(attr, &Meta::Path(path))
.help(
"multipart suggestions use one or more `#[suggestion_part]`s rather \
than one `#[primary_span]`",
)
})
}
.emit();
} else {
report_error_if_not_applied_to_span(attr, &info)?;
let binding = info.binding.binding.clone();
self.span_field.set_once(binding, span);
}
Ok(quote! {})
}
@ -292,14 +293,16 @@ impl<'a> SubdiagnosticDeriveBuilder<'a> {
if kind_stats.has_multipart_suggestion {
span_err(span, "`#[suggestion_part(...)]` attribute without `code = \"...\"`")
.emit();
Ok(quote! {})
} else {
throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
diag.help(
"`#[suggestion_part(...)]` is only valid in multipart suggestions, use `#[primary_span]` instead",
invalid_attr(attr, &Meta::Path(path))
.help(
"`#[suggestion_part(...)]` is only valid in multipart suggestions, \
use `#[primary_span]` instead",
)
});
.emit();
}
Ok(quote! {})
}
"applicability" => {
if kind_stats.has_multipart_suggestion || kind_stats.has_normal_suggestion {
@ -322,7 +325,7 @@ impl<'a> SubdiagnosticDeriveBuilder<'a> {
Ok(quote! {})
}
_ => throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
_ => {
let mut span_attrs = vec![];
if kind_stats.has_multipart_suggestion {
span_attrs.push("suggestion_part");
@ -330,11 +333,16 @@ impl<'a> SubdiagnosticDeriveBuilder<'a> {
if !kind_stats.all_multipart_suggestions {
span_attrs.push("primary_span")
}
diag.help(format!(
invalid_attr(attr, &Meta::Path(path))
.help(format!(
"only `{}`, `applicability` and `skip_arg` are valid field attributes",
span_attrs.join(", ")
))
}),
.emit();
Ok(quote! {})
}
}
}