1 files changed, 282 insertions, 0 deletions
diff --git a/compiler/rustc_hir_analysis/src/errors.rs b/compiler/rustc_hir_analysis/src/errors.rs
new file mode 100644
index 000000000..d5b1a7ce1
--- /dev/null
+++ b/compiler/rustc_hir_analysis/src/errors.rs
@@ -0,0 +1,282 @@
+//! Errors emitted by `rustc_hir_analysis`.
+
+use rustc_errors::{error_code, Applicability, DiagnosticBuilder, ErrorGuaranteed, Handler};
+use rustc_errors::{IntoDiagnostic, MultiSpan};
+use rustc_macros::{Diagnostic, LintDiagnostic};
+use rustc_middle::ty::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(generics_label)]
+    pub generics_span: Option<Span>,
+    pub item_kind: &'static str,
+    pub ident: Ident,
+}
+
+#[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(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 span: 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_trait_object_declared_with_no_traits, code = "E0224")]
+pub struct TraitObjectDeclaredWithNoTraits {
+    #[primary_span]
+    pub span: Span,
+    #[label(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,
+}
+
+#[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_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(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,
+}
+
+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 {
+    fn into_diagnostic(self, handler: &'a Handler) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+        let mut err = handler.struct_span_err_with_code(
+            self.span,
+            rustc_errors::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, rustc_errors::fluent::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,
+                    rustc_errors::fluent::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, rustc_errors::fluent::no_suggestion_label);
+        }
+
+        err.note(rustc_errors::fluent::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(LintDiagnostic)]
+#[diag(hir_analysis_unused_extern_crate)]
+pub struct UnusedExternCrate {
+    #[suggestion(applicability = "machine-applicable", code = "")]
+    pub span: Span,
+}
+
+#[derive(LintDiagnostic)]
+#[diag(hir_analysis_extern_crate_not_idiomatic)]
+pub struct ExternCrateNotIdiomatic {
+    #[suggestion_short(applicability = "machine-applicable", code = "{suggestion_code}")]
+    pub span: Span,
+    pub msg_code: String,
+    pub suggestion_code: String,
+}
+
+#[derive(Diagnostic)]
+#[diag(hir_analysis_expected_used_symbol)]
+pub struct ExpectedUsedSymbol {
+    #[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(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: (),
+}