Objective-ARC++: infer template type arguments of
ownership-unqualified retainable object type as __strong. This allows
us to write, e.g.,
std::vector<id>
and we'll infer that the vector's element types have __strong
ownership semantics, which is far nicer than requiring:
std::vector<__strong id>
Note that we allow one to override the ownership qualifier of a
substituted template type parameter, e.g., given
template<typename T>
struct X {
typedef __weak T type;
};
X<id> is treated the same as X<__strong id>. At instantiation type,
the __weak in "__weak T" overrides the (inferred or specified)
__strong on the template argument type, so that we can still provide
metaprogramming transformations.
This is part of <rdar://problem/9595486>.
llvm-svn: 133303
diff --git a/clang/lib/AST/TemplateBase.cpp b/clang/lib/AST/TemplateBase.cpp
index 6114a5a..103da1d 100644
--- a/clang/lib/AST/TemplateBase.cpp
+++ b/clang/lib/AST/TemplateBase.cpp
@@ -277,8 +277,10 @@
break;
case Type: {
+ PrintingPolicy SubPolicy(Policy);
+ SubPolicy.SuppressStrongLifetime = true;
std::string TypeStr;
- getAsType().getAsStringInternal(TypeStr, Policy);
+ getAsType().getAsStringInternal(TypeStr, SubPolicy);
Out << TypeStr;
break;
}