Expression evaluation for overloaded C functions (redux)

This is a redux of [Ewan's patch](https://reviews.llvm.org/D17957) , refactored
to properly substitute primitive  types using a hook in the itanium demangler,
and updated after the previous patch went stale

The new `SubsPrimitiveParmItanium` function takes a symbol name and replacement
primitive type parameter as before but parses it using the FastDemangler, which
has been modified to be able to notify clients of parse events (primitive types
at this point).

Additionally, we now use a `set` of `ConstStrings` instead of a `vector` so
that we don't try and resolve the same invalid candidate multiple times.

Differential Revision: https://reviews.llvm.org/D27223
Subscribers: lldb-commits

llvm-svn: 290117

1 files changed, 7 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
index af60957cf63..be5cbae57de 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
+++ b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
@@ -12,6 +12,7 @@
 
 // C Includes
 // C++ Includes
+#include <set>
 #include <vector>
 
 // Other libraries and framework includes
@@ -93,7 +94,6 @@ public:
   }
 
   std::unique_ptr<TypeScavenger> GetTypeScavenger() override;
-  
   lldb::TypeCategoryImplSP GetFormatters() override;
 
   HardcodedFormatters::HardcodedSummaryFinder GetHardcodedSummaries() override;
@@ -142,6 +142,12 @@ public:
   static uint32_t FindEquivalentNames(ConstString type_name,
                                       std::vector<ConstString> &equivalents);
 
+  // Given a mangled function name, calculates some alternative manglings since
+  // the compiler mangling may not line up with the symbol we are expecting
+  static uint32_t
+  FindAlternateFunctionManglings(const ConstString mangled,
+                                 std::set<ConstString> &candidates);
+
   //------------------------------------------------------------------
   // PluginInterface protocol
   //------------------------------------------------------------------