Made many ConstString functions inlined in the header file.

Changed all of our synthesized "___clang" functions, types and variables
that get used in expressions over to have a prefix of "$_lldb". Now when we
do name lookups we can easily switch off of the first '$' character to know
if we should look through only our internal (when first char is '$') stuff,
or when we should look through program variables, functions and types.

Converted all of the clang expression code over to using "const ConstString&" 
values for names instead of "const char *" since there were many places that
were converting the "const char *" names into ConstString names and them
throwing them away. We now avoid making a lot of ConstString conversions and
benefit from the quick comparisons in a few extra spots.

Converted a lot of code from LLVM coding conventions into LLDB coding 
conventions.



git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@116634 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangPersistentVariables.cpp b/source/Expression/ClangPersistentVariables.cpp
index 49674a9..4919922 100644
--- a/source/Expression/ClangPersistentVariables.cpp
+++ b/source/Expression/ClangPersistentVariables.cpp
@@ -22,19 +22,16 @@
 }
 
 void
-ClangPersistentVariables::GetNextResultName (std::string &name)
+ClangPersistentVariables::GetNextResultName (ConstString &name)
 {
-    StreamString s;
-    s.Printf("$%llu", m_result_counter);
-    
-    m_result_counter++;
-    
-    name = s.GetString();
+    char result_name[256];
+    ::snprintf (result_name, sizeof(result_name), "$%llu", m_result_counter++);
+    name.SetCString(result_name);
 }
 
 bool
-ClangPersistentVariables::CreatePersistentVariable(const char *name,
-                                                   TypeFromUser user_type)
+ClangPersistentVariables::CreatePersistentVariable (const ConstString &name,
+                                                    TypeFromUser user_type)
 {
     if (GetVariable(name))
             return false;