llvm-capstone/clang/test/SemaTemplate/instantiate-decl-init.cpp
Richard Smith 8aa561ba32 PR20346: fix aggregate initialization / template instantiation bug:
If, during the initial parse of a template, we perform aggregate initialization
and form an implicit value initialization for an array type, then when we come
to instantiate the template and redo the initialization step, we would try to
match the implicit value initialization up against an array *element*, not to
the complete array.

Remarkably, we've had this bug since ~the dawn of time, but only noticed it
recently.

llvm-svn: 213332
2014-07-17 23:12:06 +00:00

68 lines
1.1 KiB
C++

// RUN: %clang_cc1 -fsyntax-only -verify %s
// expected-no-diagnostics
// PR5426 - the non-dependent obj would be fully processed and wrapped in a
// CXXConstructExpr at definition time, which would lead to a failure at
// instantiation time.
struct arg {
arg();
};
struct oldstylemove {
oldstylemove(oldstylemove&);
oldstylemove(const arg&);
};
template <typename T>
void fn(T t, const arg& arg) {
oldstylemove obj(arg);
}
void test() {
fn(1, arg());
}
struct X0 { };
struct X1 {
explicit X1(const X0 &x0 = X0());
};
template<typename T>
void f0() {
X1 x1;
}
template void f0<int>();
template void f0<float>();
struct NonTrivial {
NonTrivial();
~NonTrivial();
};
template<int N> void f1() {
NonTrivial array[N];
}
template<> void f1<2>();
namespace PR20346 {
struct S { short inner_s; };
struct outer_struct {
wchar_t arr[32];
S outer_s;
};
template <class T>
void OpenFileSession() {
// Ensure that we don't think the ImplicitValueInitExpr generated here
// during the initial parse only initializes the first array element!
outer_struct asdfasdf = {};
};
void foo() {
OpenFileSession<int>();
}
}