[OPENMP] Rename OMPCapturedFieldDecl to OMPCapturedExprDecl, NFC.
OMPCapturedExprDecl allows caopturing not only of fielddecls, but also
other expressions. It also allows to simplify codegen for several
clauses.

llvm-svn: 260492
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 0f011ab..a765500 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -2483,8 +2483,8 @@
   return TD;
 }
 
-Decl *TemplateDeclInstantiator::VisitOMPCapturedFieldDecl(
-    OMPCapturedFieldDecl * /*D*/) {
+Decl *TemplateDeclInstantiator::VisitOMPCapturedExprDecl(
+    OMPCapturedExprDecl * /*D*/) {
   llvm_unreachable("Should not be met in templates");
 }