1 files changed, 329 insertions, 0 deletions
diff --git a/compiler/rustc_ast_lowering/src/errors.rs b/compiler/rustc_ast_lowering/src/errors.rs
new file mode 100644
index 00000000000..59f1b7180e4
--- /dev/null
+++ b/compiler/rustc_ast_lowering/src/errors.rs
@@ -0,0 +1,329 @@
+use rustc_errors::{fluent, AddSubdiagnostic, Applicability, Diagnostic, DiagnosticArgFromDisplay};
+use rustc_macros::{SessionDiagnostic, SessionSubdiagnostic};
+use rustc_span::{symbol::Ident, Span, Symbol};
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::generic_type_with_parentheses, code = "E0214")]
+pub struct GenericTypeWithParentheses {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+    #[subdiagnostic]
+    pub sub: Option<UseAngleBrackets>,
+}
+
+#[derive(Clone, Copy)]
+pub struct UseAngleBrackets {
+    pub open_param: Span,
+    pub close_param: Span,
+}
+
+impl AddSubdiagnostic for UseAngleBrackets {
+    fn add_to_diagnostic(self, diag: &mut Diagnostic) {
+        diag.multipart_suggestion(
+            fluent::ast_lowering::use_angle_brackets,
+            vec![(self.open_param, String::from("<")), (self.close_param, String::from(">"))],
+            Applicability::MaybeIncorrect,
+        );
+    }
+}
+
+#[derive(SessionDiagnostic)]
+#[help]
+#[diag(ast_lowering::invalid_abi, code = "E0703")]
+pub struct InvalidAbi {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+    pub abi: Symbol,
+    pub valid_abis: String,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::assoc_ty_parentheses)]
+pub struct AssocTyParentheses {
+    #[primary_span]
+    pub span: Span,
+    #[subdiagnostic]
+    pub sub: AssocTyParenthesesSub,
+}
+
+#[derive(Clone, Copy)]
+pub enum AssocTyParenthesesSub {
+    Empty { parentheses_span: Span },
+    NotEmpty { open_param: Span, close_param: Span },
+}
+
+impl AddSubdiagnostic for AssocTyParenthesesSub {
+    fn add_to_diagnostic(self, diag: &mut Diagnostic) {
+        match self {
+            Self::Empty { parentheses_span } => diag.multipart_suggestion(
+                fluent::ast_lowering::remove_parentheses,
+                vec![(parentheses_span, String::new())],
+                Applicability::MaybeIncorrect,
+            ),
+            Self::NotEmpty { open_param, close_param } => diag.multipart_suggestion(
+                fluent::ast_lowering::use_angle_brackets,
+                vec![(open_param, String::from("<")), (close_param, String::from(">"))],
+                Applicability::MaybeIncorrect,
+            ),
+        };
+    }
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(ast_lowering::misplaced_impl_trait, code = "E0562")]
+pub struct MisplacedImplTrait<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub position: DiagnosticArgFromDisplay<'a>,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::rustc_box_attribute_error)]
+pub struct RustcBoxAttributeError {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::underscore_expr_lhs_assign)]
+pub struct UnderscoreExprLhsAssign {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::base_expression_double_dot)]
+pub struct BaseExpressionDoubleDot {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::await_only_in_async_fn_and_blocks, code = "E0728")]
+pub struct AwaitOnlyInAsyncFnAndBlocks {
+    #[primary_span]
+    #[label]
+    pub dot_await_span: Span,
+    #[label(ast_lowering::this_not_async)]
+    pub item_span: Option<Span>,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::generator_too_many_parameters, code = "E0628")]
+pub struct GeneratorTooManyParameters {
+    #[primary_span]
+    pub fn_decl_span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::closure_cannot_be_static, code = "E0697")]
+pub struct ClosureCannotBeStatic {
+    #[primary_span]
+    pub fn_decl_span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[help]
+#[diag(ast_lowering::async_non_move_closure_not_supported, code = "E0708")]
+pub struct AsyncNonMoveClosureNotSupported {
+    #[primary_span]
+    pub fn_decl_span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::functional_record_update_destructuring_assignment)]
+pub struct FunctionalRecordUpdateDestructuringAssignemnt {
+    #[primary_span]
+    #[suggestion(code = "", applicability = "machine-applicable")]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::async_generators_not_supported, code = "E0727")]
+pub struct AsyncGeneratorsNotSupported {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::inline_asm_unsupported_target, code = "E0472")]
+pub struct InlineAsmUnsupportedTarget {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::att_syntax_only_x86)]
+pub struct AttSyntaxOnlyX86 {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::abi_specified_multiple_times)]
+pub struct AbiSpecifiedMultipleTimes {
+    #[primary_span]
+    pub abi_span: Span,
+    pub prev_name: Symbol,
+    #[label]
+    pub prev_span: Span,
+    #[note]
+    pub equivalent: Option<()>,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::clobber_abi_not_supported)]
+pub struct ClobberAbiNotSupported {
+    #[primary_span]
+    pub abi_span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[note]
+#[diag(ast_lowering::invalid_abi_clobber_abi)]
+pub struct InvalidAbiClobberAbi {
+    #[primary_span]
+    pub abi_span: Span,
+    pub supported_abis: String,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::invalid_register)]
+pub struct InvalidRegister<'a> {
+    #[primary_span]
+    pub op_span: Span,
+    pub reg: Symbol,
+    pub error: &'a str,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::invalid_register_class)]
+pub struct InvalidRegisterClass<'a> {
+    #[primary_span]
+    pub op_span: Span,
+    pub reg_class: Symbol,
+    pub error: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(ast_lowering::invalid_asm_template_modifier_reg_class)]
+pub struct InvalidAsmTemplateModifierRegClass {
+    #[primary_span]
+    #[label(ast_lowering::template_modifier)]
+    pub placeholder_span: Span,
+    #[label(ast_lowering::argument)]
+    pub op_span: Span,
+    #[subdiagnostic]
+    pub sub: InvalidAsmTemplateModifierRegClassSub,
+}
+
+#[derive(SessionSubdiagnostic)]
+pub enum InvalidAsmTemplateModifierRegClassSub {
+    #[note(ast_lowering::support_modifiers)]
+    SupportModifier { class_name: Symbol, modifiers: String },
+    #[note(ast_lowering::does_not_support_modifiers)]
+    DoesNotSupportModifier { class_name: Symbol },
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::invalid_asm_template_modifier_const)]
+pub struct InvalidAsmTemplateModifierConst {
+    #[primary_span]
+    #[label(ast_lowering::template_modifier)]
+    pub placeholder_span: Span,
+    #[label(ast_lowering::argument)]
+    pub op_span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::invalid_asm_template_modifier_sym)]
+pub struct InvalidAsmTemplateModifierSym {
+    #[primary_span]
+    #[label(ast_lowering::template_modifier)]
+    pub placeholder_span: Span,
+    #[label(ast_lowering::argument)]
+    pub op_span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::register_class_only_clobber)]
+pub struct RegisterClassOnlyClobber {
+    #[primary_span]
+    pub op_span: Span,
+    pub reg_class_name: Symbol,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::register_conflict)]
+pub struct RegisterConflict<'a> {
+    #[primary_span]
+    #[label(ast_lowering::register1)]
+    pub op_span1: Span,
+    #[label(ast_lowering::register2)]
+    pub op_span2: Span,
+    pub reg1_name: &'a str,
+    pub reg2_name: &'a str,
+    #[help]
+    pub in_out: Option<Span>,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[help]
+#[diag(ast_lowering::sub_tuple_binding)]
+pub struct SubTupleBinding<'a> {
+    #[primary_span]
+    #[label]
+    #[suggestion_verbose(
+        ast_lowering::sub_tuple_binding_suggestion,
+        code = "..",
+        applicability = "maybe-incorrect"
+    )]
+    pub span: Span,
+    pub ident: Ident,
+    pub ident_name: Symbol,
+    pub ctx: &'a str,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::extra_double_dot)]
+pub struct ExtraDoubleDot<'a> {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+    #[label(ast_lowering::previously_used_here)]
+    pub prev_span: Span,
+    pub ctx: &'a str,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[note]
+#[diag(ast_lowering::misplaced_double_dot)]
+pub struct MisplacedDoubleDot {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::misplaced_relax_trait_bound)]
+pub struct MisplacedRelaxTraitBound {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::not_supported_for_lifetime_binder_async_closure)]
+pub struct NotSupportedForLifetimeBinderAsyncClosure {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::arbitrary_expression_in_pattern)]
+pub struct ArbitraryExpressionInPattern {
+    #[primary_span]
+    pub span: Span,
+}