Migrate pattern inlining error diagnostics

Author: lzcunt

compiler/rustc_error_messages/locales/en-US/mir_build.ftl

@@ -183,3 +183,11 @@ mir_build_non_exhaustive_patterns_type_not_empty = non-exhaustive patterns: type
     .reference_note = references are always considered inhabited
     .suggestion = ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
     .help = ensure that all possible cases are being handled by adding a match arm with a wildcard pattern
+
+mir_build_static_in_pattern = statics cannot be referenced in patterns
+
+mir_build_assoc_const_in_pattern = associated consts cannot be referenced in patterns
+
+mir_build_const_param_in_pattern = const parameters cannot be referenced in patterns
+
+mir_build_non_const_path = runtime values cannot be referenced in patterns

compiler/rustc_mir_build/src/errors.rs

@@ -429,3 +429,31 @@ impl<'a> SessionDiagnostic<'a> for NonExhaustivePatternsTypeNotEmpty<'_, '_, '_>
         diag
     }
 }
+
+#[derive(SessionDiagnostic)]
+#[diag(mir_build::static_in_pattern, code = "E0158")]
+pub struct StaticInPattern {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(mir_build::assoc_const_in_pattern, code = "E0158")]
+pub struct AssocConstInPattern {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(mir_build::const_param_in_pattern, code = "E0158")]
+pub struct ConstParamInPattern {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(mir_build::non_const_path, code = "E0080")]
+pub struct NonConstPath {
+    #[primary_span]
+    pub span: Span,
+}

compiler/rustc_mir_build/src/thir/pattern/check_match.rs

@@ -4,7 +4,7 @@ use super::usefulness::{
 };
 use super::{PatCtxt, PatternError};
 
-use crate::errors::NonExhaustivePatternsTypeNotEmpty;
+use crate::errors::*;
 
 use rustc_arena::TypedArena;
 use rustc_ast::Mutability;
@@ -109,28 +109,20 @@ impl PatCtxt<'_, '_> {
         for error in &self.errors {
             match *error {
                 PatternError::StaticInPattern(span) => {
-                    self.span_e0158(span, "statics cannot be referenced in patterns")
+                    self.tcx.sess.emit_err(StaticInPattern { span });
                 }
                 PatternError::AssocConstInPattern(span) => {
-                    self.span_e0158(span, "associated consts cannot be referenced in patterns")
+                    self.tcx.sess.emit_err(AssocConstInPattern { span });
                 }
                 PatternError::ConstParamInPattern(span) => {
-                    self.span_e0158(span, "const parameters cannot be referenced in patterns")
+                    self.tcx.sess.emit_err(ConstParamInPattern { span });
                 }
                 PatternError::NonConstPath(span) => {
-                    rustc_middle::mir::interpret::struct_error(
-                        self.tcx.at(span),
-                        "runtime values cannot be referenced in patterns",
-                    )
-                    .emit();
+                    self.tcx.sess.emit_err(NonConstPath { span });
                 }
             }
         }
     }
-
-    fn span_e0158(&self, span: Span, text: &str) {
-        struct_span_err!(self.tcx.sess, span, E0158, "{}", text).emit();
-    }
 }
 
 impl<'p, 'tcx> MatchVisitor<'_, 'p, 'tcx> {