[Demangle][Rust] Parse inherent implementations

Part of https://reviews.llvm.org/D102549

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/lib/Demangle/RustDemangle.cpp b/llvm/lib/Demangle/RustDemangle.cpp
index ebccafc..223d815 100644
--- a/llvm/lib/Demangle/RustDemangle.cpp
+++ b/llvm/lib/Demangle/RustDemangle.cpp
@@ -101,6 +101,7 @@ static inline bool isValid(const char C) {
 bool Demangler::demangle(StringView Mangled) {
   Position = 0;
   Error = false;
+  Print = true;
   RecursionLevel = 0;
 
   if (!Mangled.consumeFront("_R")) {
@@ -145,6 +146,13 @@ void Demangler::demanglePath() {
     print(Ident.Name);
     break;
   }
+  case 'M': {
+    demangleImplPath();
+    print("<");
+    demangleType();
+    print(">");
+    break;
+  }
   case 'N': {
     char NS = consume();
     if (!isLower(NS) && !isUpper(NS)) {
@@ -199,6 +207,14 @@ void Demangler::demanglePath() {
   }
 }
 
+// <impl-path> = [<disambiguator>] <path>
+// <disambiguator> = "s" <base-62-number>
+void Demangler::demangleImplPath() {
+  SwapAndRestore<bool> SavePrint(Print, false);
+  parseOptionalBase62Number('s');
+  demanglePath();
+}
+
 // <generic-arg> = <lifetime>
 //               | <type>
 //               | "K" <const>