rust/tests/ui-fulldeps/session-diagnostic/diagnostic-derive.rs

826 lines
21 KiB
Rust

// check-fail
// Tests error conditions for specifying diagnostics using #[derive(Diagnostic)]
// normalize-stderr-test "the following other types implement trait `IntoDiagnosticArg`:(?:.*\n){0,9}\s+and \d+ others" -> "normalized in stderr"
// normalize-stderr-test "diagnostic_builder\.rs:[0-9]+:[0-9]+" -> "diagnostic_builder.rs:LL:CC"
// The proc_macro2 crate handles spans differently when on beta/stable release rather than nightly,
// changing the output of this test. Since Diagnostic is strictly internal to the compiler
// the test is just ignored on stable and beta:
// ignore-stage1
// ignore-beta
// ignore-stable
#![feature(rustc_private)]
#![crate_type = "lib"]
extern crate rustc_span;
use rustc_span::symbol::Ident;
use rustc_span::Span;
extern crate rustc_fluent_macro;
extern crate rustc_macros;
use rustc_fluent_macro::fluent_messages;
use rustc_macros::{Diagnostic, LintDiagnostic, Subdiagnostic};
extern crate rustc_middle;
use rustc_middle::ty::Ty;
extern crate rustc_errors;
use rustc_errors::{Applicability, DiagnosticMessage, MultiSpan, SubdiagnosticMessage};
extern crate rustc_session;
fluent_messages! { "./example.ftl" }
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct Hello {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct HelloWarn {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
//~^ ERROR unsupported type attribute for diagnostic derive enum
enum DiagnosticOnEnum {
Foo,
//~^ ERROR diagnostic slug not specified
Bar,
//~^ ERROR diagnostic slug not specified
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[diag = "E0123"]
//~^ ERROR expected parentheses: #[diag(...)]
struct WrongStructAttrStyle {}
#[derive(Diagnostic)]
#[nonsense(no_crate_example, code = "E0123")]
//~^ ERROR `#[nonsense(...)]` is not a valid attribute
//~^^ ERROR diagnostic slug not specified
//~^^^ ERROR cannot find attribute `nonsense` in this scope
struct InvalidStructAttr {}
#[derive(Diagnostic)]
#[diag("E0123")]
//~^ ERROR diagnostic slug not specified
struct InvalidLitNestedAttr {}
#[derive(Diagnostic)]
#[diag(nonsense, code = "E0123")]
//~^ ERROR cannot find value `nonsense` in module `crate::fluent_generated`
struct InvalidNestedStructAttr {}
#[derive(Diagnostic)]
#[diag(nonsense("foo"), code = "E0123", slug = "foo")]
//~^ ERROR diagnostic slug must be the first argument
//~| ERROR diagnostic slug not specified
struct InvalidNestedStructAttr1 {}
#[derive(Diagnostic)]
#[diag(nonsense = "...", code = "E0123", slug = "foo")]
//~^ ERROR unknown argument
//~| ERROR diagnostic slug not specified
struct InvalidNestedStructAttr2 {}
#[derive(Diagnostic)]
#[diag(nonsense = 4, code = "E0123", slug = "foo")]
//~^ ERROR unknown argument
//~| ERROR diagnostic slug not specified
struct InvalidNestedStructAttr3 {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123", slug = "foo")]
//~^ ERROR unknown argument
struct InvalidNestedStructAttr4 {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct WrongPlaceField {
#[suggestion = "bar"]
//~^ ERROR `#[suggestion = ...]` is not a valid attribute
sp: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[diag(no_crate_example, code = "E0456")]
//~^ ERROR specified multiple times
//~^^ ERROR specified multiple times
struct DiagSpecifiedTwice {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0456", code = "E0457")]
//~^ ERROR specified multiple times
struct CodeSpecifiedTwice {}
#[derive(Diagnostic)]
#[diag(no_crate_example, no_crate::example, code = "E0456")]
//~^ ERROR diagnostic slug must be the first argument
struct SlugSpecifiedTwice {}
#[derive(Diagnostic)]
struct KindNotProvided {} //~ ERROR diagnostic slug not specified
#[derive(Diagnostic)]
#[diag(code = "E0456")]
//~^ ERROR diagnostic slug not specified
struct SlugNotProvided {}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct CodeNotProvided {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct MessageWrongType {
#[primary_span]
//~^ ERROR `#[primary_span]` attribute can only be applied to fields of type `Span` or `MultiSpan`
foo: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct InvalidPathFieldAttr {
#[nonsense]
//~^ ERROR `#[nonsense]` is not a valid attribute
//~^^ ERROR cannot find attribute `nonsense` in this scope
foo: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithField {
name: String,
#[label(no_crate_label)]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithMessageAppliedToField {
#[label(no_crate_label)]
//~^ ERROR the `#[label(...)]` attribute can only be applied to fields of type `Span` or `MultiSpan`
name: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithNonexistentField {
#[suggestion(no_crate_suggestion, code = "{name}")]
//~^ ERROR `name` doesn't refer to a field on this type
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
//~^ ERROR invalid format string: expected `'}'`
#[diag(no_crate_example, code = "E0123")]
struct ErrorMissingClosingBrace {
#[suggestion(no_crate_suggestion, code = "{name")]
suggestion: (Span, Applicability),
name: String,
val: usize,
}
#[derive(Diagnostic)]
//~^ ERROR invalid format string: unmatched `}`
#[diag(no_crate_example, code = "E0123")]
struct ErrorMissingOpeningBrace {
#[suggestion(no_crate_suggestion, code = "name}")]
suggestion: (Span, Applicability),
name: String,
val: usize,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct LabelOnSpan {
#[label(no_crate_label)]
sp: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct LabelOnNonSpan {
#[label(no_crate_label)]
//~^ ERROR the `#[label(...)]` attribute can only be applied to fields of type `Span` or `MultiSpan`
id: u32,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct Suggest {
#[suggestion(no_crate_suggestion, code = "This is the suggested code")]
#[suggestion(no_crate_suggestion, code = "This is the suggested code", style = "normal")]
#[suggestion(no_crate_suggestion, code = "This is the suggested code", style = "short")]
#[suggestion(no_crate_suggestion, code = "This is the suggested code", style = "hidden")]
#[suggestion(no_crate_suggestion, code = "This is the suggested code", style = "verbose")]
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithoutCode {
#[suggestion(no_crate_suggestion)]
//~^ ERROR suggestion without `code = "..."`
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithBadKey {
#[suggestion(nonsense = "bar")]
//~^ ERROR invalid nested attribute
//~| ERROR suggestion without `code = "..."`
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithShorthandMsg {
#[suggestion(msg = "bar")]
//~^ ERROR invalid nested attribute
//~| ERROR suggestion without `code = "..."`
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithoutMsg {
#[suggestion(code = "bar")]
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithTypesSwapped {
#[suggestion(no_crate_suggestion, code = "This is suggested code")]
suggestion: (Applicability, Span),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithWrongTypeApplicabilityOnly {
#[suggestion(no_crate_suggestion, code = "This is suggested code")]
//~^ ERROR wrong field type for suggestion
suggestion: Applicability,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithSpanOnly {
#[suggestion(no_crate_suggestion, code = "This is suggested code")]
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithDuplicateSpanAndApplicability {
#[suggestion(no_crate_suggestion, code = "This is suggested code")]
suggestion: (Span, Span, Applicability),
//~^ ERROR specified multiple times
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct SuggestWithDuplicateApplicabilityAndSpan {
#[suggestion(no_crate_suggestion, code = "This is suggested code")]
suggestion: (Applicability, Applicability, Span),
//~^ ERROR specified multiple times
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct WrongKindOfAnnotation {
#[label = "bar"]
//~^ ERROR `#[label = ...]` is not a valid attribute
z: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct OptionsInErrors {
#[label(no_crate_label)]
label: Option<Span>,
#[suggestion(no_crate_suggestion, code = "...")]
opt_sugg: Option<(Span, Applicability)>,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0456")]
struct MoveOutOfBorrowError<'tcx> {
name: Ident,
ty: Ty<'tcx>,
#[primary_span]
#[label(no_crate_label)]
span: Span,
#[label(no_crate_label)]
other_span: Span,
#[suggestion(no_crate_suggestion, code = "{name}.clone()")]
opt_sugg: Option<(Span, Applicability)>,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithLifetime<'a> {
#[label(no_crate_label)]
span: Span,
name: &'a str,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithDefaultLabelAttr<'a> {
#[label]
span: Span,
name: &'a str,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ArgFieldWithoutSkip {
#[primary_span]
span: Span,
other: Hello,
//~^ ERROR the trait bound `Hello: IntoDiagnosticArg` is not satisfied
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ArgFieldWithSkip {
#[primary_span]
span: Span,
// `Hello` does not implement `IntoDiagnosticArg` so this would result in an error if
// not for `#[skip_arg]`.
#[skip_arg]
other: Hello,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithSpannedNote {
#[note]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithSpannedNoteCustom {
#[note(no_crate_note)]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[note]
struct ErrorWithNote {
val: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[note(no_crate_note)]
struct ErrorWithNoteCustom {
val: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithSpannedHelp {
#[help]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithSpannedHelpCustom {
#[help(no_crate_help)]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[help]
struct ErrorWithHelp {
val: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[help(no_crate_help)]
struct ErrorWithHelpCustom {
val: String,
}
#[derive(Diagnostic)]
#[help]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithHelpWrongOrder {
val: String,
}
#[derive(Diagnostic)]
#[help(no_crate_help)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithHelpCustomWrongOrder {
val: String,
}
#[derive(Diagnostic)]
#[note]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithNoteWrongOrder {
val: String,
}
#[derive(Diagnostic)]
#[note(no_crate_note)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithNoteCustomWrongOrder {
val: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ApplicabilityInBoth {
#[suggestion(no_crate_suggestion, code = "...", applicability = "maybe-incorrect")]
//~^ ERROR specified multiple times
suggestion: (Span, Applicability),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct InvalidApplicability {
#[suggestion(no_crate_suggestion, code = "...", applicability = "batman")]
//~^ ERROR invalid applicability
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ValidApplicability {
#[suggestion(no_crate_suggestion, code = "...", applicability = "maybe-incorrect")]
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct NoApplicability {
#[suggestion(no_crate_suggestion, code = "...")]
suggestion: Span,
}
#[derive(Subdiagnostic)]
#[note(no_crate_example)]
struct Note;
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct Subdiagnostic {
#[subdiagnostic]
note: Note,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct VecField {
#[primary_span]
#[label]
spans: Vec<Span>,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct UnitField {
#[primary_span]
spans: Span,
#[help]
foo: (),
#[help(no_crate_help)]
bar: (),
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct OptUnitField {
#[primary_span]
spans: Span,
#[help]
foo: Option<()>,
#[help(no_crate_help)]
bar: Option<()>,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct BoolField {
#[primary_span]
spans: Span,
#[help]
foo: bool,
#[help(no_crate_help)]
//~^ ERROR the `#[help(...)]` attribute can only be applied to fields of type
// only allow plain 'bool' fields
bar: Option<bool>,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct LabelWithTrailingPath {
#[label(no_crate_label, foo)]
//~^ ERROR a diagnostic slug must be the first argument to the attribute
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct LabelWithTrailingNameValue {
#[label(no_crate_label, foo = "...")]
//~^ ERROR only `no_span` is a valid nested attribute
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct LabelWithTrailingList {
#[label(no_crate_label, foo("..."))]
//~^ ERROR only `no_span` is a valid nested attribute
span: Span,
}
#[derive(LintDiagnostic)]
#[diag(no_crate_example)]
struct LintsGood {}
#[derive(LintDiagnostic)]
#[diag(no_crate_example)]
struct PrimarySpanOnLint {
#[primary_span]
//~^ ERROR `#[primary_span]` is not a valid attribute
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct ErrorWithMultiSpan {
#[primary_span]
span: MultiSpan,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[warning]
struct ErrorWithWarn {
val: String,
}
#[derive(Diagnostic)]
#[error(no_crate_example, code = "E0123")]
//~^ ERROR `#[error(...)]` is not a valid attribute
//~| ERROR diagnostic slug not specified
//~| ERROR cannot find attribute `error` in this scope
struct ErrorAttribute {}
#[derive(Diagnostic)]
#[warn_(no_crate_example, code = "E0123")]
//~^ ERROR `#[warn_(...)]` is not a valid attribute
//~| ERROR diagnostic slug not specified
//~| ERROR cannot find attribute `warn_` in this scope
struct WarnAttribute {}
#[derive(Diagnostic)]
#[lint(no_crate_example, code = "E0123")]
//~^ ERROR `#[lint(...)]` is not a valid attribute
//~| ERROR diagnostic slug not specified
//~| ERROR cannot find attribute `lint` in this scope
struct LintAttributeOnSessionDiag {}
#[derive(LintDiagnostic)]
#[lint(no_crate_example, code = "E0123")]
//~^ ERROR `#[lint(...)]` is not a valid attribute
//~| ERROR `#[lint(...)]` is not a valid attribute
//~| ERROR diagnostic slug not specified
//~| ERROR cannot find attribute `lint` in this scope
struct LintAttributeOnLintDiag {}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct DuplicatedSuggestionCode {
#[suggestion(no_crate_suggestion, code = "...", code = ",,,")]
//~^ ERROR specified multiple times
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct InvalidTypeInSuggestionTuple {
#[suggestion(no_crate_suggestion, code = "...")]
suggestion: (Span, usize),
//~^ ERROR wrong types for suggestion
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct MissingApplicabilityInSuggestionTuple {
#[suggestion(no_crate_suggestion, code = "...")]
suggestion: (Span,),
//~^ ERROR wrong types for suggestion
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct MissingCodeInSuggestion {
#[suggestion(no_crate_suggestion)]
//~^ ERROR suggestion without `code = "..."`
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[multipart_suggestion(no_crate_suggestion)]
//~^ ERROR `#[multipart_suggestion(...)]` is not a valid attribute
//~| ERROR cannot find attribute `multipart_suggestion` in this scope
#[multipart_suggestion()]
//~^ ERROR cannot find attribute `multipart_suggestion` in this scope
//~| ERROR unexpected end of input, unexpected token in nested attribute, expected ident
struct MultipartSuggestion {
#[multipart_suggestion(no_crate_suggestion)]
//~^ ERROR `#[multipart_suggestion(...)]` is not a valid attribute
//~| ERROR cannot find attribute `multipart_suggestion` in this scope
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[suggestion(no_crate_suggestion, code = "...")]
//~^ ERROR `#[suggestion(...)]` is not a valid attribute
struct SuggestionOnStruct {
#[primary_span]
suggestion: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
#[label]
//~^ ERROR `#[label]` is not a valid attribute
struct LabelOnStruct {
#[primary_span]
suggestion: Span,
}
#[derive(Diagnostic)]
enum ExampleEnum {
#[diag(no_crate_example)]
Foo {
#[primary_span]
sp: Span,
#[note]
note_sp: Span,
},
#[diag(no_crate_example)]
Bar {
#[primary_span]
sp: Span,
},
#[diag(no_crate_example)]
Baz,
}
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct RawIdentDiagnosticArg {
pub r#type: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticBad {
#[subdiagnostic(bad)]
//~^ ERROR `eager` is the only supported nested attribute for `subdiagnostic`
note: Note,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticBadStr {
#[subdiagnostic = "bad"]
//~^ ERROR `#[subdiagnostic = ...]` is not a valid attribute
note: Note,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticBadTwice {
#[subdiagnostic(bad, bad)]
//~^ ERROR `eager` is the only supported nested attribute for `subdiagnostic`
note: Note,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticBadLitStr {
#[subdiagnostic("bad")]
//~^ ERROR `eager` is the only supported nested attribute for `subdiagnostic`
note: Note,
}
#[derive(LintDiagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticEagerLint {
#[subdiagnostic(eager)]
//~^ ERROR `#[subdiagnostic(...)]` is not a valid attribute
note: Note,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticEagerCorrect {
#[subdiagnostic(eager)]
note: Note,
}
// Check that formatting of `correct` in suggestion doesn't move the binding for that field, making
// the `set_arg` call a compile error; and that isn't worked around by moving the `set_arg` call
// after the `span_suggestion` call - which breaks eager translation.
#[derive(Subdiagnostic)]
#[suggestion(no_crate_example, applicability = "machine-applicable", code = "{correct}")]
pub(crate) struct SubdiagnosticWithSuggestion {
#[primary_span]
span: Span,
invalid: String,
correct: String,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SubdiagnosticEagerSuggestion {
#[subdiagnostic(eager)]
sub: SubdiagnosticWithSuggestion,
}
/// with a doc comment on the type..
#[derive(Diagnostic)]
#[diag(no_crate_example, code = "E0123")]
struct WithDocComment {
/// ..and the field
#[primary_span]
span: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionsGood {
#[suggestion(code("foo", "bar"))]
sub: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionsSingleItem {
#[suggestion(code("foo"))]
sub: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionsNoItem {
#[suggestion(code())]
//~^ ERROR expected at least one string literal for `code(...)`
sub: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionsInvalidItem {
#[suggestion(code(foo))]
//~^ ERROR `code(...)` must contain only string literals
//~| ERROR unexpected token
sub: Span,
}
#[derive(Diagnostic)] //~ ERROR cannot find value `__code_34` in this scope
#[diag(no_crate_example)]
struct SuggestionsInvalidLiteral {
#[suggestion(code = 3)]
//~^ ERROR expected string literal
sub: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionStyleGood {
#[suggestion(code = "", style = "hidden")]
sub: Span,
}
#[derive(Diagnostic)]
#[diag(no_crate_example)]
struct SuggestionOnVec {
#[suggestion(no_crate_suggestion, code = "")]
//~^ ERROR `#[suggestion(...)]` is not a valid attribute
sub: Vec<Span>,
}