Create ConstantExpr class

A ConstantExpr class represents a full expression that's in a context where a
constant expression is required. This class reflects the path the evaluator
took to reach the expression rather than the syntactic context in which the
expression occurs.

In the future, the class will be expanded to cache the result of the evaluated
expression so that it's not needlessly re-evaluated

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D53475

llvm-svn: 345692

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
index 890bec7b824..0fee9e20ef3 100644
--- a/clang/tools/libclang/CXCursor.cpp
+++ b/clang/tools/libclang/CXCursor.cpp
@@ -343,6 +343,10 @@ CXCursor cxcursor::MakeCXCursor(const Stmt *S, const Decl *Parent,
     K = CXCursor_CharacterLiteral;
     break;
 
+  case Stmt::ConstantExprClass:
+    return MakeCXCursor(cast<ConstantExpr>(S)->getSubExpr(),
+                        Parent, TU, RegionOfInterest);
+
   case Stmt::ParenExprClass:
     K = CXCursor_ParenExpr;
     break;