errors.rs

//! Errors emitted by `rustc_hir_analysis`.

use crate::fluent_generated as fluent;
use rustc_errors::{
    error_code, Applicability, DiagnosticBuilder, ErrorGuaranteed, Handler, IntoDiagnostic,
    MultiSpan,
};
use rustc_macros::{Diagnostic, LintDiagnostic, Subdiagnostic};
use rustc_middle::ty::{self, print::TraitRefPrintOnlyTraitPath, Ty};
use rustc_span::{symbol::Ident, Span, Symbol};

#[derive(Diagnostic)]
#[diag(hir_analysis_unrecognized_atomic_operation, code = "E0092")]
pub struct UnrecognizedAtomicOperation<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub op: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_wrong_number_of_generic_arguments_to_intrinsic, code = "E0094")]
pub struct WrongNumberOfGenericArgumentsToIntrinsic<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub found: usize,
    pub expected: usize,
    pub descr: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_unrecognized_intrinsic_function, code = "E0093")]
pub struct UnrecognizedIntrinsicFunction {
    #[primary_span]
    #[label]
    pub span: Span,
    pub name: Symbol,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_lifetimes_or_bounds_mismatch_on_trait, code = "E0195")]
pub struct LifetimesOrBoundsMismatchOnTrait {
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_generics_label)]
    pub generics_span: Option<Span>,
    #[label(hir_analysis_where_label)]
    pub where_span: Option<Span>,
    #[label(hir_analysis_bounds_label)]
    pub bounds_span: Vec<Span>,
    pub item_kind: &'static str,
    pub ident: Ident,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_async_trait_impl_should_be_async)]
pub struct AsyncTraitImplShouldBeAsync {
    #[primary_span]
    // #[label]
    pub span: Span,
    #[label(hir_analysis_trait_item_label)]
    pub trait_item_span: Option<Span>,
    pub method_name: Symbol,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_drop_impl_on_wrong_item, code = "E0120")]
pub struct DropImplOnWrongItem {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_field_already_declared, code = "E0124")]
pub struct FieldAlreadyDeclared {
    pub field_name: Ident,
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_previous_decl_label)]
    pub prev_span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_copy_impl_on_type_with_dtor, code = "E0184")]
pub struct CopyImplOnTypeWithDtor {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_multiple_relaxed_default_bounds, code = "E0203")]
pub struct MultipleRelaxedDefaultBounds {
    #[primary_span]
    pub spans: Vec<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_copy_impl_on_non_adt, code = "E0206")]
pub struct CopyImplOnNonAdt {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_const_param_ty_impl_on_non_adt)]
pub struct ConstParamTyImplOnNonAdt {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_trait_object_declared_with_no_traits, code = "E0224")]
pub struct TraitObjectDeclaredWithNoTraits {
    #[primary_span]
    pub span: Span,
    #[label(hir_analysis_alias_span)]
    pub trait_alias_span: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_ambiguous_lifetime_bound, code = "E0227")]
pub struct AmbiguousLifetimeBound {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_assoc_type_binding_not_allowed, code = "E0229")]
pub struct AssocTypeBindingNotAllowed {
    #[primary_span]
    #[label]
    pub span: Span,

    #[subdiagnostic]
    pub fn_trait_expansion: Option<ParenthesizedFnTraitExpansion>,
}

#[derive(Subdiagnostic)]
#[help(hir_analysis_parenthesized_fn_trait_expansion)]
pub struct ParenthesizedFnTraitExpansion {
    #[primary_span]
    pub span: Span,

    pub expanded_type: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_typeof_reserved_keyword_used, code = "E0516")]
pub struct TypeofReservedKeywordUsed<'tcx> {
    pub ty: Ty<'tcx>,
    #[primary_span]
    #[label]
    pub span: Span,
    #[suggestion(style = "verbose", code = "{ty}")]
    pub opt_sugg: Option<(Span, Applicability)>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_value_of_associated_struct_already_specified, code = "E0719")]
pub struct ValueOfAssociatedStructAlreadySpecified {
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_previous_bound_label)]
    pub prev_span: Span,
    pub item_name: Ident,
    pub def_path: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_unconstrained_opaque_type)]
#[note]
pub struct UnconstrainedOpaqueType {
    #[primary_span]
    pub span: Span,
    pub name: Symbol,
    pub what: &'static str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_tait_forward_compat)]
#[note]
pub struct TaitForwardCompat {
    #[primary_span]
    pub span: Span,
    #[note]
    pub item_span: Span,
}

pub struct MissingTypeParams {
    pub span: Span,
    pub def_span: Span,
    pub span_snippet: Option<String>,
    pub missing_type_params: Vec<Symbol>,
    pub empty_generic_args: bool,
}

// Manual implementation of `IntoDiagnostic` to be able to call `span_to_snippet`.
impl<'a> IntoDiagnostic<'a> for MissingTypeParams {
    #[track_caller]
    fn into_diagnostic(self, handler: &'a Handler) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
        let mut err = handler.struct_span_err_with_code(
            self.span,
            fluent::hir_analysis_missing_type_params,
            error_code!(E0393),
        );
        err.set_arg("parameterCount", self.missing_type_params.len());
        err.set_arg(
            "parameters",
            self.missing_type_params
                .iter()
                .map(|n| format!("`{n}`"))
                .collect::<Vec<_>>()
                .join(", "),
        );

        err.span_label(self.def_span, fluent::hir_analysis_label);

        let mut suggested = false;
        // Don't suggest setting the type params if there are some already: the order is
        // tricky to get right and the user will already know what the syntax is.
        if let Some(snippet) = self.span_snippet
            && self.empty_generic_args
        {
            if snippet.ends_with('>') {
                // The user wrote `Trait<'a, T>` or similar. To provide an accurate suggestion
                // we would have to preserve the right order. For now, as clearly the user is
                // aware of the syntax, we do nothing.
            } else {
                // The user wrote `Iterator`, so we don't have a type we can suggest, but at
                // least we can clue them to the correct syntax `Iterator<Type>`.
                err.span_suggestion(
                    self.span,
                    fluent::hir_analysis_suggestion,
                    format!(
                        "{}<{}>",
                        snippet,
                        self.missing_type_params
                            .iter()
                            .map(|n| n.to_string())
                            .collect::<Vec<_>>()
                            .join(", ")
                    ),
                    Applicability::HasPlaceholders,
                );
                suggested = true;
            }
        }
        if !suggested {
            err.span_label(self.span, fluent::hir_analysis_no_suggestion_label);
        }

        err.note(fluent::hir_analysis_note);
        err
    }
}

#[derive(Diagnostic)]
#[diag(hir_analysis_manual_implementation, code = "E0183")]
#[help]
pub struct ManualImplementation {
    #[primary_span]
    #[label]
    pub span: Span,
    pub trait_name: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_substs_on_overridden_impl)]
pub struct SubstsOnOverriddenImpl {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_const_impl_for_non_const_trait)]
pub struct ConstImplForNonConstTrait {
    #[primary_span]
    pub trait_ref_span: Span,
    pub trait_name: String,
    #[suggestion(applicability = "machine-applicable", code = "#[const_trait]")]
    pub local_trait_span: Option<Span>,
    #[note]
    pub marking: (),
    #[note(hir_analysis_adding)]
    pub adding: (),
}

#[derive(Diagnostic)]
#[diag(hir_analysis_const_bound_for_non_const_trait)]
pub struct ConstBoundForNonConstTrait {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_self_in_impl_self)]
pub struct SelfInImplSelf {
    #[primary_span]
    pub span: MultiSpan,
    #[note]
    pub note: (),
}

#[derive(Diagnostic)]
#[diag(hir_analysis_linkage_type, code = "E0791")]
pub(crate) struct LinkageType {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[help]
#[diag(hir_analysis_auto_deref_reached_recursion_limit, code = "E0055")]
pub struct AutoDerefReachedRecursionLimit<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub ty: Ty<'a>,
    pub suggested_limit: rustc_session::Limit,
    pub crate_name: Symbol,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_where_clause_on_main, code = "E0646")]
pub(crate) struct WhereClauseOnMain {
    #[primary_span]
    pub span: Span,
    #[label]
    pub generics_span: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_track_caller_on_main)]
pub(crate) struct TrackCallerOnMain {
    #[primary_span]
    #[suggestion(applicability = "maybe-incorrect", code = "")]
    pub span: Span,
    #[label(hir_analysis_track_caller_on_main)]
    pub annotated: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_target_feature_on_main)]
pub(crate) struct TargetFeatureOnMain {
    #[primary_span]
    #[label(hir_analysis_target_feature_on_main)]
    pub main: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_start_not_track_caller)]
pub(crate) struct StartTrackCaller {
    #[primary_span]
    pub span: Span,
    #[label]
    pub start: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_start_not_target_feature)]
pub(crate) struct StartTargetFeature {
    #[primary_span]
    pub span: Span,
    #[label]
    pub start: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_start_not_async, code = "E0752")]
pub(crate) struct StartAsync {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_start_function_where, code = "E0647")]
pub(crate) struct StartFunctionWhere {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_start_function_parameters, code = "E0132")]
pub(crate) struct StartFunctionParameters {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_main_function_return_type_generic, code = "E0131")]
pub(crate) struct MainFunctionReturnTypeGeneric {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_main_function_async, code = "E0752")]
pub(crate) struct MainFunctionAsync {
    #[primary_span]
    pub span: Span,
    #[label]
    pub asyncness: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_main_function_generic_parameters, code = "E0131")]
pub(crate) struct MainFunctionGenericParameters {
    #[primary_span]
    pub span: Span,
    #[label]
    pub label_span: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_variadic_function_compatible_convention, code = "E0045")]
pub(crate) struct VariadicFunctionCompatibleConvention<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub conventions: &'a str,
}

#[derive(Diagnostic)]
pub(crate) enum CannotCaptureLateBound {
    #[diag(hir_analysis_cannot_capture_late_bound_ty)]
    Type {
        #[primary_span]
        use_span: Span,
        #[label]
        def_span: Span,
        what: &'static str,
    },
    #[diag(hir_analysis_cannot_capture_late_bound_const)]
    Const {
        #[primary_span]
        use_span: Span,
        #[label]
        def_span: Span,
        what: &'static str,
    },
    #[diag(hir_analysis_cannot_capture_late_bound_lifetime)]
    Lifetime {
        #[primary_span]
        use_span: Span,
        #[label]
        def_span: Span,
        what: &'static str,
    },
}

#[derive(Diagnostic)]
#[diag(hir_analysis_variances_of)]
pub(crate) struct VariancesOf {
    #[primary_span]
    pub span: Span,
    pub variances_of: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_type_of)]
pub(crate) struct TypeOf<'tcx> {
    #[primary_span]
    pub span: Span,
    pub type_of: Ty<'tcx>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_pass_to_variadic_function, code = "E0617")]
pub(crate) struct PassToVariadicFunction<'tcx, 'a> {
    #[primary_span]
    pub span: Span,
    pub ty: Ty<'tcx>,
    pub cast_ty: &'a str,
    #[suggestion(code = "{replace}", applicability = "machine-applicable")]
    pub sugg_span: Option<Span>,
    pub replace: String,
    #[help]
    pub help: Option<()>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_cast_thin_pointer_to_fat_pointer, code = "E0607")]
pub(crate) struct CastThinPointerToFatPointer<'tcx> {
    #[primary_span]
    pub span: Span,
    pub expr_ty: Ty<'tcx>,
    pub cast_ty: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_invalid_union_field, code = "E0740")]
pub(crate) struct InvalidUnionField {
    #[primary_span]
    pub field_span: Span,
    #[subdiagnostic]
    pub sugg: InvalidUnionFieldSuggestion,
    #[note]
    pub note: (),
}

#[derive(Diagnostic)]
#[diag(hir_analysis_return_type_notation_on_non_rpitit)]
pub(crate) struct ReturnTypeNotationOnNonRpitit<'tcx> {
    #[primary_span]
    pub span: Span,
    pub ty: Ty<'tcx>,
    #[label]
    pub fn_span: Option<Span>,
    #[note]
    pub note: (),
}

#[derive(Subdiagnostic)]
#[multipart_suggestion(hir_analysis_invalid_union_field_sugg, applicability = "machine-applicable")]
pub(crate) struct InvalidUnionFieldSuggestion {
    #[suggestion_part(code = "std::mem::ManuallyDrop<")]
    pub lo: Span,
    #[suggestion_part(code = ">")]
    pub hi: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_return_type_notation_equality_bound)]
pub(crate) struct ReturnTypeNotationEqualityBound {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_return_type_notation_missing_method)]
pub(crate) struct ReturnTypeNotationMissingMethod {
    #[primary_span]
    pub span: Span,
    pub ty_name: String,
    pub assoc_name: Symbol,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_return_type_notation_conflicting_bound)]
#[note]
pub(crate) struct ReturnTypeNotationConflictingBound<'tcx> {
    #[primary_span]
    pub span: Span,
    pub ty_name: String,
    pub assoc_name: Symbol,
    pub first_bound: ty::Binder<'tcx, TraitRefPrintOnlyTraitPath<'tcx>>,
    pub second_bound: ty::Binder<'tcx, TraitRefPrintOnlyTraitPath<'tcx>>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_placeholder_not_allowed_item_signatures, code = "E0121")]
pub(crate) struct PlaceholderNotAllowedItemSignatures {
    #[primary_span]
    #[label]
    pub spans: Vec<Span>,
    pub kind: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_associated_type_trait_uninferred_generic_params, code = "E0212")]
pub(crate) struct AssociatedTypeTraitUninferredGenericParams {
    #[primary_span]
    pub span: Span,
    #[suggestion(style = "verbose", applicability = "maybe-incorrect", code = "{bound}")]
    pub inferred_sugg: Option<Span>,
    pub bound: String,
    #[subdiagnostic]
    pub mpart_sugg: Option<AssociatedTypeTraitUninferredGenericParamsMultipartSuggestion>,
}

#[derive(Subdiagnostic)]
#[multipart_suggestion(
    hir_analysis_associated_type_trait_uninferred_generic_params_multipart_suggestion,
    applicability = "maybe-incorrect"
)]
pub(crate) struct AssociatedTypeTraitUninferredGenericParamsMultipartSuggestion {
    #[suggestion_part(code = "{first}")]
    pub fspan: Span,
    pub first: String,
    #[suggestion_part(code = "{second}")]
    pub sspan: Span,
    pub second: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_enum_discriminant_overflowed, code = "E0370")]
#[note]
pub(crate) struct EnumDiscriminantOverflowed {
    #[primary_span]
    #[label]
    pub span: Span,
    pub discr: String,
    pub item_name: Symbol,
    pub wrapped_discr: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_paren_sugar_attribute)]
#[help]
pub(crate) struct ParenSugarAttribute {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_must_implement_one_of_attribute)]
pub(crate) struct MustImplementOneOfAttribute {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_must_be_name_of_associated_function)]
pub(crate) struct MustBeNameOfAssociatedFunction {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_function_not_have_default_implementation)]
pub(crate) struct FunctionNotHaveDefaultImplementation {
    #[primary_span]
    pub span: Span,
    #[note]
    pub note_span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_must_implement_not_function)]
pub(crate) struct MustImplementNotFunction {
    #[primary_span]
    pub span: Span,
    #[subdiagnostic]
    pub span_note: MustImplementNotFunctionSpanNote,
    #[subdiagnostic]
    pub note: MustImplementNotFunctionNote,
}

#[derive(Subdiagnostic)]
#[note(hir_analysis_must_implement_not_function_span_note)]
pub(crate) struct MustImplementNotFunctionSpanNote {
    #[primary_span]
    pub span: Span,
}

#[derive(Subdiagnostic)]
#[note(hir_analysis_must_implement_not_function_note)]
pub(crate) struct MustImplementNotFunctionNote {}

#[derive(Diagnostic)]
#[diag(hir_analysis_function_not_found_in_trait)]
pub(crate) struct FunctionNotFoundInTrait {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_functions_names_duplicated)]
#[note]
pub(crate) struct FunctionNamesDuplicated {
    #[primary_span]
    pub spans: Vec<Span>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_simd_ffi_highly_experimental)]
#[help]
pub(crate) struct SIMDFFIHighlyExperimental {
    #[primary_span]
    pub span: Span,
    pub snip: String,
}

#[derive(Diagnostic)]
pub enum ImplNotMarkedDefault {
    #[diag(hir_analysis_impl_not_marked_default, code = "E0520")]
    #[note]
    Ok {
        #[primary_span]
        #[label]
        span: Span,
        #[label(hir_analysis_ok_label)]
        ok_label: Span,
        ident: Symbol,
    },
    #[diag(hir_analysis_impl_not_marked_default_err, code = "E0520")]
    #[note]
    Err {
        #[primary_span]
        span: Span,
        cname: Symbol,
        ident: Symbol,
    },
}

#[derive(Diagnostic)]
#[diag(hir_analysis_missing_trait_item, code = "E0046")]
pub(crate) struct MissingTraitItem {
    #[primary_span]
    #[label]
    pub span: Span,
    #[subdiagnostic]
    pub missing_trait_item_label: Vec<MissingTraitItemLabel>,
    #[subdiagnostic]
    pub missing_trait_item: Vec<MissingTraitItemSuggestion>,
    #[subdiagnostic]
    pub missing_trait_item_none: Vec<MissingTraitItemSuggestionNone>,
    pub missing_items_msg: String,
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_missing_trait_item_label)]
pub(crate) struct MissingTraitItemLabel {
    #[primary_span]
    pub span: Span,
    pub item: Symbol,
}

#[derive(Subdiagnostic)]
#[suggestion(
    hir_analysis_missing_trait_item_suggestion,
    style = "tool-only",
    applicability = "has-placeholders",
    code = "{code}"
)]
pub(crate) struct MissingTraitItemSuggestion {
    #[primary_span]
    pub span: Span,
    pub code: String,
    pub snippet: String,
}

#[derive(Subdiagnostic)]
#[suggestion(
    hir_analysis_missing_trait_item_suggestion,
    style = "hidden",
    applicability = "has-placeholders",
    code = "{code}"
)]
pub(crate) struct MissingTraitItemSuggestionNone {
    #[primary_span]
    pub span: Span,
    pub code: String,
    pub snippet: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_missing_one_of_trait_item, code = "E0046")]
pub(crate) struct MissingOneOfTraitItem {
    #[primary_span]
    #[label]
    pub span: Span,
    #[note]
    pub note: Option<Span>,
    pub missing_items_msg: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_missing_trait_item_unstable, code = "E0046")]
#[note]
pub(crate) struct MissingTraitItemUnstable {
    #[primary_span]
    pub span: Span,
    #[note(hir_analysis_some_note)]
    pub some_note: bool,
    #[note(hir_analysis_none_note)]
    pub none_note: bool,
    pub missing_item_name: Symbol,
    pub feature: Symbol,
    pub reason: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_transparent_enum_variant, code = "E0731")]
pub(crate) struct TransparentEnumVariant {
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_multi_label)]
    pub spans: Vec<Span>,
    #[label(hir_analysis_many_label)]
    pub many: Option<Span>,
    pub number: usize,
    pub path: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_transparent_non_zero_sized_enum, code = "E0690")]
pub(crate) struct TransparentNonZeroSizedEnum<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_labels)]
    pub spans: Vec<Span>,
    pub field_count: usize,
    pub desc: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_transparent_non_zero_sized, code = "E0690")]
pub(crate) struct TransparentNonZeroSized<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    #[label(hir_analysis_labels)]
    pub spans: Vec<Span>,
    pub field_count: usize,
    pub desc: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_too_large_static)]
pub(crate) struct TooLargeStatic {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_specialization_trait)]
#[help]
pub(crate) struct SpecializationTrait {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_closure_implicit_hrtb)]
pub(crate) struct ClosureImplicitHrtb {
    #[primary_span]
    pub spans: Vec<Span>,
    #[label]
    pub for_sp: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_empty_specialization)]
pub(crate) struct EmptySpecialization {
    #[primary_span]
    pub span: Span,
    #[note]
    pub base_impl_span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_const_specialize)]
pub(crate) struct ConstSpecialize {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_static_specialize)]
pub(crate) struct StaticSpecialize {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_missing_tilde_const)]
pub(crate) struct MissingTildeConst {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
pub(crate) enum DropImplPolarity {
    #[diag(hir_analysis_drop_impl_negative)]
    Negative {
        #[primary_span]
        span: Span,
    },
    #[diag(hir_analysis_drop_impl_reservation)]
    Reservation {
        #[primary_span]
        span: Span,
    },
}

#[derive(Diagnostic)]
pub(crate) enum ReturnTypeNotationIllegalParam {
    #[diag(hir_analysis_return_type_notation_illegal_param_type)]
    Type {
        #[primary_span]
        span: Span,
        #[label]
        param_span: Span,
    },
    #[diag(hir_analysis_return_type_notation_illegal_param_const)]
    Const {
        #[primary_span]
        span: Span,
        #[label]
        param_span: Span,
    },
}

#[derive(Diagnostic)]
pub(crate) enum LateBoundInApit {
    #[diag(hir_analysis_late_bound_type_in_apit)]
    Type {
        #[primary_span]
        span: Span,
        #[label]
        param_span: Span,
    },
    #[diag(hir_analysis_late_bound_const_in_apit)]
    Const {
        #[primary_span]
        span: Span,
        #[label]
        param_span: Span,
    },
    #[diag(hir_analysis_late_bound_lifetime_in_apit)]
    Lifetime {
        #[primary_span]
        span: Span,
        #[label]
        param_span: Span,
    },
}

#[derive(LintDiagnostic)]
#[diag(hir_analysis_unused_associated_type_bounds)]
#[note]
pub struct UnusedAssociatedTypeBounds {
    #[suggestion(code = "")]
    pub span: Span,
}

#[derive(LintDiagnostic)]
#[diag(hir_analysis_rpitit_refined)]
#[note]
pub(crate) struct ReturnPositionImplTraitInTraitRefined<'tcx> {
    #[suggestion(applicability = "maybe-incorrect", code = "{pre}{return_ty}{post}")]
    pub impl_return_span: Span,
    #[label]
    pub trait_return_span: Option<Span>,
    #[label(hir_analysis_unmatched_bound_label)]
    pub unmatched_bound: Option<Span>,

    pub pre: &'static str,
    pub post: &'static str,
    pub return_ty: Ty<'tcx>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_assoc_bound_on_const)]
#[note]
pub struct AssocBoundOnConst {
    #[primary_span]
    pub span: Span,
    pub descr: &'static str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_ty_outside, code = "E0390")]
#[help]
pub struct InherentTyOutside {
    #[primary_span]
    #[help(hir_analysis_span_help)]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0378")]
pub struct DispatchFromDynCoercion<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
    #[note(hir_analysis_coercion_between_struct_same_note)]
    pub note: bool,
    pub source_path: String,
    pub target_path: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_dispatch_from_dyn_repr, code = "E0378")]
pub struct DispatchFromDynRepr {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_ty_outside_relevant, code = "E0390")]
#[help]
pub struct InherentTyOutsideRelevant {
    #[primary_span]
    pub span: Span,
    #[help(hir_analysis_span_help)]
    pub help_span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_ty_outside_new, code = "E0116")]
#[note]
pub struct InherentTyOutsideNew {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_ty_outside_primitive, code = "E0390")]
#[help]
pub struct InherentTyOutsidePrimitive {
    #[primary_span]
    pub span: Span,
    #[help(hir_analysis_span_help)]
    pub help_span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_primitive_ty, code = "E0390")]
#[help]
pub struct InherentPrimitiveTy<'a> {
    #[primary_span]
    pub span: Span,
    #[subdiagnostic]
    pub note: Option<InherentPrimitiveTyNote<'a>>,
}

#[derive(Subdiagnostic)]
#[note(hir_analysis_inherent_primitive_ty_note)]
pub struct InherentPrimitiveTyNote<'a> {
    pub subty: Ty<'a>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_dyn, code = "E0785")]
#[note]
pub struct InherentDyn {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_inherent_nominal, code = "E0118")]
#[note]
pub struct InherentNominal {
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_dispatch_from_dyn_zst, code = "E0378")]
#[note]
pub struct DispatchFromDynZST<'a> {
    #[primary_span]
    pub span: Span,
    pub name: Symbol,
    pub ty: Ty<'a>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0378")]
pub struct DispatchFromDynSingle<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
    #[note(hir_analysis_coercion_between_struct_single_note)]
    pub note: bool,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_dispatch_from_dyn_multi, code = "E0378")]
#[note]
pub struct DispatchFromDynMulti {
    #[primary_span]
    pub span: Span,
    #[note(hir_analysis_coercions_note)]
    pub coercions_note: bool,
    pub number: usize,
    pub coercions: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0376")]
pub struct DispatchFromDynStruct<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0377")]
pub struct DispatchFromDynSame<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
    #[note(hir_analysis_coercion_between_struct_same_note)]
    pub note: bool,
    pub source_path: String,
    pub target_path: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0374")]
pub struct CoerceUnsizedOneField<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
    #[note(hir_analysis_coercion_between_struct_single_note)]
    pub note: bool,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_multi, code = "E0375")]
#[note]
pub struct CoerceUnsizedMulti {
    #[primary_span]
    #[label]
    pub span: Span,
    #[note(hir_analysis_coercions_note)]
    pub coercions_note: bool,
    pub number: usize,
    pub coercions: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_coerce_unsized_may, code = "E0378")]
pub struct CoerceUnsizedMay<'a> {
    #[primary_span]
    pub span: Span,
    pub trait_name: &'a str,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_trait_cannot_impl_for_ty, code = "E0204")]
pub struct TraitCannotImplForTy {
    #[primary_span]
    pub span: Span,
    pub trait_name: String,
    #[label]
    pub label_spans: Vec<Span>,
    #[subdiagnostic]
    pub notes: Vec<ImplForTyRequires>,
}

#[derive(Subdiagnostic)]
#[note(hir_analysis_requires_note)]
pub struct ImplForTyRequires {
    #[primary_span]
    pub span: MultiSpan,
    pub error_predicate: String,
    pub trait_name: String,
    pub ty: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_traits_with_defualt_impl, code = "E0321")]
#[note]
pub struct TraitsWithDefaultImpl<'a> {
    #[primary_span]
    pub span: Span,
    pub traits: String,
    pub problematic_kind: &'a str,
    pub self_ty: Ty<'a>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_cross_crate_traits, code = "E0321")]
pub struct CrossCrateTraits<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub traits: String,
    pub self_ty: Ty<'a>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_cross_crate_traits_defined, code = "E0321")]
pub struct CrossCrateTraitsDefined {
    #[primary_span]
    #[label]
    pub span: Span,
    pub traits: String,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_ty_param_first_local, code = "E0210")]
#[note]
pub struct TyParamFirstLocal<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    #[note(hir_analysis_case_note)]
    pub note: (),
    pub param_ty: Ty<'a>,
    pub local_type: Ty<'a>,
}

#[derive(Diagnostic)]
#[diag(hir_analysis_ty_param_some, code = "E0210")]
#[note]
pub struct TyParamSome<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    #[note(hir_analysis_only_note)]
    pub note: (),
    pub param_ty: Ty<'a>,
}

#[derive(Diagnostic)]
pub enum OnlyCurrentTraits<'a> {
    #[diag(hir_analysis_only_current_traits_outside, code = "E0117")]
    Outside {
        #[primary_span]
        #[label(hir_analysis_only_current_traits_label)]
        span: Span,
        #[note(hir_analysis_only_current_traits_note)]
        note: (),
        #[subdiagnostic]
        opaque: Vec<OnlyCurrentTraitsOpaque>,
        #[subdiagnostic]
        foreign: Vec<OnlyCurrentTraitsForeign>,
        #[subdiagnostic]
        name: Vec<OnlyCurrentTraitsName<'a>>,
        #[subdiagnostic]
        pointer: Vec<OnlyCurrentTraitsPointer<'a>>,
        #[subdiagnostic]
        ty: Vec<OnlyCurrentTraitsTy<'a>>,
        #[subdiagnostic]
        sugg: Option<OnlyCurrentTraitsPointerSugg<'a>>,
    },
    #[diag(hir_analysis_only_current_traits_primitive, code = "E0117")]
    Primitive {
        #[primary_span]
        #[label(hir_analysis_only_current_traits_label)]
        span: Span,
        #[note(hir_analysis_only_current_traits_note)]
        note: (),
        #[subdiagnostic]
        opaque: Vec<OnlyCurrentTraitsOpaque>,
        #[subdiagnostic]
        foreign: Vec<OnlyCurrentTraitsForeign>,
        #[subdiagnostic]
        name: Vec<OnlyCurrentTraitsName<'a>>,
        #[subdiagnostic]
        pointer: Vec<OnlyCurrentTraitsPointer<'a>>,
        #[subdiagnostic]
        ty: Vec<OnlyCurrentTraitsTy<'a>>,
        #[subdiagnostic]
        sugg: Option<OnlyCurrentTraitsPointerSugg<'a>>,
    },
    #[diag(hir_analysis_only_current_traits_arbitrary, code = "E0117")]
    Arbitrary {
        #[primary_span]
        #[label(hir_analysis_only_current_traits_label)]
        span: Span,
        #[note(hir_analysis_only_current_traits_note)]
        note: (),
        #[subdiagnostic]
        opaque: Vec<OnlyCurrentTraitsOpaque>,
        #[subdiagnostic]
        foreign: Vec<OnlyCurrentTraitsForeign>,
        #[subdiagnostic]
        name: Vec<OnlyCurrentTraitsName<'a>>,
        #[subdiagnostic]
        pointer: Vec<OnlyCurrentTraitsPointer<'a>>,
        #[subdiagnostic]
        ty: Vec<OnlyCurrentTraitsTy<'a>>,
        #[subdiagnostic]
        sugg: Option<OnlyCurrentTraitsPointerSugg<'a>>,
    },
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_only_current_traits_opaque)]
pub struct OnlyCurrentTraitsOpaque {
    #[primary_span]
    pub span: Span,
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_only_current_traits_foreign)]
pub struct OnlyCurrentTraitsForeign {
    #[primary_span]
    pub span: Span,
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_only_current_traits_name)]
pub struct OnlyCurrentTraitsName<'a> {
    #[primary_span]
    pub span: Span,
    pub name: &'a str,
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_only_current_traits_pointer)]
pub struct OnlyCurrentTraitsPointer<'a> {
    #[primary_span]
    pub span: Span,
    pub pointer: Ty<'a>,
}

#[derive(Subdiagnostic)]
#[label(hir_analysis_only_current_traits_ty)]
pub struct OnlyCurrentTraitsTy<'a> {
    #[primary_span]
    pub span: Span,
    pub ty: Ty<'a>,
}

#[derive(Subdiagnostic)]
#[multipart_suggestion(
    hir_analysis_only_current_traits_pointer_sugg,
    applicability = "maybe-incorrect"
)]
pub struct OnlyCurrentTraitsPointerSugg<'a> {
    #[suggestion_part(code = "WrapperType")]
    pub wrapper_span: Span,
    #[suggestion_part(code = "struct WrapperType(*{mut_key}{ptr_ty});\n\n")]
    pub struct_span: Span,
    pub mut_key: &'a str,
    pub ptr_ty: Ty<'a>,
}