[PATCH] D103847: [Demangle][Rust] Parse type backreferences

[Tomasz Miąsko via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG44d63c57c129: [Demangle][Rust] Parse type backreferences (authored by tmiasko).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D103847/new/

https://reviews.llvm.org/D103847

Files:
  llvm/lib/Demangle/RustDemangle.cpp
  llvm/test/Demangle/rust.test


Index: llvm/test/Demangle/rust.test
===================================================================
--- llvm/test/Demangle/rust.test
+++ llvm/test/Demangle/rust.test
@@ -425,6 +425,9 @@
 CHECK: backref::<backref::ident>
        _RIC7backrefNvB0_5identE
 
+CHECK: backref::<(), ()>
+       _RIC7backrefuB9_E
+
 ; Invalid backreferences
 
 CHECK: _RB_
@@ -436,6 +439,9 @@
 CHECK: _RNvB_1a
        _RNvB_1a
 
+CHECK: _RIC7backrefSB9_E
+       _RIC7backrefSB9_E
+
 ; Invalid mangled characters
 
 CHECK: _RNvC2a.1c
Index: llvm/lib/Demangle/RustDemangle.cpp
===================================================================
--- llvm/lib/Demangle/RustDemangle.cpp
+++ llvm/lib/Demangle/RustDemangle.cpp
@@ -438,8 +438,13 @@
 //          | "D" <dyn-bounds> <lifetime> // dyn Trait<Assoc = X> + Send + 'a
 //          | <backref>                   // backref
 void Demangler::demangleType() {
-  size_t Start = Position;
+  if (Error || RecursionLevel >= MaxRecursionLevel) {
+    Error = true;
+    return;
+  }
+  SwapAndRestore<size_t> SaveRecursionLevel(RecursionLevel, RecursionLevel + 1);
 
+  size_t Start = Position;
   char C = consume();
   BasicType Type;
   if (parseBasicType(C, Type))
@@ -506,6 +511,9 @@
       Error = true;
     }
     break;
+  case 'B':
+    demangleBackref([&] { demangleType(); });
+    break;
   default:
     Position = Start;
     demanglePath(rust_demangle::InType::Yes);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D103847.350523.patch
Type: text/x-patch
Size: 1411 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20210608/16ea17bc/attachment.bin>