[Demangle][Rust] Parse dyn-bounds

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D103151

1 files changed, 21 insertions, 0 deletions

diff --git a/llvm/lib/Demangle/RustDemangle.cpp b/llvm/lib/Demangle/RustDemangle.cpp
index d6cf78b..04bc175 100644
--- a/llvm/lib/Demangle/RustDemangle.cpp
+++ b/llvm/lib/Demangle/RustDemangle.cpp
@@ -480,6 +480,17 @@ void Demangler::demangleType() {
   case 'F':
     demangleFnSig();
     break;
+  case 'D':
+    demangleDynBounds();
+    if (consumeIf('L')) {
+      if (auto Lifetime = parseBase62Number()) {
+        print(" + ");
+        printLifetime(Lifetime);
+      }
+    } else {
+      Error = true;
+    }
+    break;
   default:
     Position = Start;
     demanglePath(rust_demangle::InType::Yes);
@@ -529,6 +540,16 @@ void Demangler::demangleFnSig() {
   }
 }
 
+// <dyn-bounds> = [<binder>] {<dyn-trait>} "E"
+void Demangler::demangleDynBounds() {
+  SwapAndRestore<size_t> SaveBoundLifetimes(BoundLifetimes, BoundLifetimes);
+  print("dyn ");
+  demangleOptionalBinder();
+  // FIXME demangle {dyn-trait}
+  if (!consumeIf('E'))
+    Error = true;
+}
+
 // Demangles optional binder and updates the number of bound lifetimes.
 //
 // <binder> = "G" <base-62-number>