Allow the use of default template arguments when forming a class

template specialization (e.g., std::vector<int> would now be
well-formed, since it relies on a default argument for the Allocator
template parameter). 

This is much less interesting than one might expect, since (1) we're
not actually using the default arguments for anything important, such
as naming an actual Decl, and (2) we'll often need to instantiate the
default arguments to check their well-formedness. The real fun will
come later.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64310 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/test/SemaTemplate/default-arguments.cpp b/test/SemaTemplate/default-arguments.cpp
new file mode 100644
index 0000000000..94976e9735
--- /dev/null
+++ b/test/SemaTemplate/default-arguments.cpp
@@ -0,0 +1,13 @@
+// RUN: clang -fsyntax-only -verify %s
+
+template<typename T, int N = 2> struct X; // expected-note{{template is declared here}}
+
+X<int, 1> *x1;
+X<int> *x2;
+
+X<> *x3; // expected-error{{too few template arguments for class template 'X'}} \
+        // FIXME: expected-error{{expected unqualified-id}}
+
+template<typename U = float, int M> struct X;
+
+X<> *x4;