Template argument deduction for template template parameters. This
permits, among other things, ripping apart and reconstructing
templates via partial specialization:
template<typename T>
struct DeepRemoveConst { typedef T type; };
template<typename T>
struct DeepRemoveConst<const T> {
typedef typename DeepRemoveConst<T>::type type;
};
template<template<typename> class TT, typename T>
struct DeepRemoveConst<TT<T> > {
typedef TT<typename DeepRemoveConst<T>::type> type;
};
Also, fix a longstanding thinko in the code handling partial ordering
of class template partial specializations. We were performing the
second deduction without clearing out the results of the first
deduction. It's amazing we got through so much code with such a
horrendous error :(
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86893 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index b5d9cac..0add7e6 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -2350,6 +2350,12 @@
return DTN->CanonicalTemplateName;
}
+bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) {
+ X = getCanonicalTemplateName(X);
+ Y = getCanonicalTemplateName(Y);
+ return X.getAsVoidPointer() == Y.getAsVoidPointer();
+}
+
TemplateArgument
ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) {
switch (Arg.getKind()) {