Refactored Field Error Function

Refactored field error function into one function,
to make easier error emission. Fixes Rust-GCC#2336

gcc/rust/ChangeLog:

	* typecheck/rust-hir-type-check-pattern.cc (emit_invalid_field_error): Refactored field
	error function
	(TypeCheckPattern::visit): called 'emit_invalid_field_error' function

Signed-off-by: Muhammad Mahad <mahadtxt@gmail.com>

gcc/rust/typecheck/rust-hir-type-check-pattern.cc

@@ -139,6 +139,15 @@ TypeCheckPattern::visit (HIR::TupleStructPattern &pattern)
     }
 }
 
+void
+emit_invalid_field_error (Location loc, Rust::TyTy::VariantDef *variant,
+			  const char *message)
+{
+  rust_error_at (loc, ErrorCode ("E0026"),
+		 "variant %s does not have a field named %s",
+		 variant->get_identifier ().c_str (), message);
+}
+
 void
 TypeCheckPattern::visit (HIR::StructPattern &pattern)
 {
@@ -204,10 +213,8 @@ TypeCheckPattern::visit (HIR::StructPattern &pattern)
 	    if (!variant->lookup_field (ident.get_identifier (), &field,
 					nullptr))
 	      {
-		rust_error_at (ident.get_locus (), ErrorCode ("E0026"),
-			       "variant %s does not have a field named %s",
-			       variant->get_identifier ().c_str (),
-			       ident.get_identifier ().c_str ());
+		emit_invalid_field_error (ident.get_locus (), variant,
+					  ident.get_identifier ().c_str ());
 		break;
 	      }
 	    named_fields.push_back (ident.get_identifier ());
@@ -225,10 +232,8 @@ TypeCheckPattern::visit (HIR::StructPattern &pattern)
 	    if (!variant->lookup_field (ident.get_identifier (), &field,
 					nullptr))
 	      {
-		rust_error_at (ident.get_locus (), ErrorCode ("E0026"),
-			       "variant %s does not have a field named %s",
-			       variant->get_identifier ().c_str (),
-			       ident.get_identifier ().c_str ());
+		emit_invalid_field_error (ident.get_locus (), variant,
+					  ident.get_identifier ().c_str ());
 		break;
 	      }
 	    named_fields.push_back (ident.get_identifier ());