4 files changed, 23 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-compile-fnparam.h b/gcc/rust/backend/rust-compile-fnparam.h
index 289ecee..6f7f0653 100644
--- a/gcc/rust/backend/rust-compile-fnparam.h
+++ b/gcc/rust/backend/rust-compile-fnparam.h
@@ -39,6 +39,7 @@ public:
   void visit (HIR::TupleStructPattern &) override;
 
   // Empty visit for unused Pattern HIR nodes.
+  void visit (HIR::AltPattern &) override {}
   void visit (HIR::LiteralPattern &) override {}
   void visit (HIR::PathInExpression &) override {}
   void visit (HIR::QualifiedPathInExpression &) override {}
diff --git a/gcc/rust/backend/rust-compile-pattern.h b/gcc/rust/backend/rust-compile-pattern.h
index 0d53cd5..a7bd115 100644
--- a/gcc/rust/backend/rust-compile-pattern.h
+++ b/gcc/rust/backend/rust-compile-pattern.h
@@ -39,6 +39,13 @@ public:
   void visit (HIR::WildcardPattern &pattern) override;
   void visit (HIR::RangePattern &pattern) override;
 
+  // unsupported
+  void visit (HIR::AltPattern &pattern) override
+  {
+    rust_sorry_at (pattern.get_locus (),
+		   "alternate pattern case labels not supported");
+  }
+
   // Empty visit for unused Pattern HIR nodes.
   void visit (HIR::IdentifierPattern &) override {}
   void visit (HIR::LiteralPattern &) override;
@@ -70,6 +77,13 @@ public:
   void visit (HIR::StructPattern &pattern) override;
   void visit (HIR::TupleStructPattern &pattern) override;
 
+  // unsupported
+  void visit (HIR::AltPattern &pattern) override
+  {
+    rust_sorry_at (pattern.get_locus (),
+		   "alternate pattern bindings not supported");
+  }
+
   // Empty visit for unused Pattern HIR nodes.
   void visit (HIR::IdentifierPattern &) override {}
   void visit (HIR::LiteralPattern &) override {}
@@ -104,6 +118,12 @@ public:
   void visit (HIR::TuplePattern &) override;
 
   // check for unimplemented Pattern HIR nodes.
+  void visit (HIR::AltPattern &pattern) override
+  {
+    rust_sorry_at (pattern.get_locus (),
+		   "alternate pattern let statements not supported");
+  }
+
   void visit (HIR::LiteralPattern &pattern) override
   {
     rust_sorry_at (pattern.get_locus (),
diff --git a/gcc/rust/backend/rust-compile-resolve-path.h b/gcc/rust/backend/rust-compile-resolve-path.h
index 8aedb16..93b0a7f 100644
--- a/gcc/rust/backend/rust-compile-resolve-path.h
+++ b/gcc/rust/backend/rust-compile-resolve-path.h
@@ -50,6 +50,7 @@ public:
   void visit (HIR::RangePattern &) override {}
   void visit (HIR::ReferencePattern &) override {}
   void visit (HIR::SlicePattern &) override {}
+  void visit (HIR::AltPattern &) override {}
   void visit (HIR::StructPattern &) override {}
   void visit (HIR::TuplePattern &) override {}
   void visit (HIR::TupleStructPattern &) override {}
diff --git a/gcc/rust/backend/rust-compile-var-decl.h b/gcc/rust/backend/rust-compile-var-decl.h
index a4aa7cf8..9a3fcb5 100644
--- a/gcc/rust/backend/rust-compile-var-decl.h
+++ b/gcc/rust/backend/rust-compile-var-decl.h
@@ -54,6 +54,7 @@ public:
   }
 
   // Empty visit for unused Pattern HIR nodes.
+  void visit (HIR::AltPattern &) override {}
   void visit (HIR::LiteralPattern &) override {}
   void visit (HIR::PathInExpression &) override {}
   void visit (HIR::QualifiedPathInExpression &) override {}