blob: 02431e02e48dd6b6dba5bf862c818f765bfb216b [file] [log] [blame]
// This is a test for an egregious hack in Clang that works around
// an issue with GCC's <utility> implementation. std::pair::swap
// has an exception specification that makes an unqualified call to
// swap. This is invalid, because it ends up calling itself with
// the wrong number of arguments.
// The same problem afflicts a bunch of other class templates. Those
// affected are array, pair, priority_queue, stack, and queue.
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=array
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=pair
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=priority_queue
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=stack
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=queue
// MSVC's standard library uses a very similar pattern that relies on delayed
// parsing of exception specifications.
// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify -fexceptions -fcxx-exceptions -DCLASS=array -DMSVC
#pragma GCC system_header
namespace std {
template<typename T> void swap(T &, T &);
template<typename T> void do_swap(T &a, T &b) noexcept(noexcept(swap(a, b))) {
swap(a, b);
template<typename A, typename B> struct CLASS {
#ifdef MSVC
void swap(CLASS &other) noexcept(noexcept(do_swap(member, other.member)));
A member;
#ifndef MSVC
void swap(CLASS &other) noexcept(noexcept(swap(member, other.member)));
// template<typename T> void do_swap(T &, T &);
// template<typename A> struct vector {
// void swap(vector &other) noexcept(noexcept(do_swap(member, other.member)));
// A member;
// };
#include __FILE__
struct X {};
using PX = std::CLASS<X, X>;
using PI = std::CLASS<int, int>;
void swap(X &, X &) noexcept;
PX px;
PI pi;
static_assert(noexcept(px.swap(px)), "");
static_assert(!noexcept(pi.swap(pi)), "");
namespace sad {
template<typename T> void swap(T &, T &);
template<typename A, typename B> struct CLASS {
void swap(CLASS &other) noexcept(noexcept(swap(*this, other))); // expected-error {{too many arguments}} expected-note {{declared here}}
CLASS<int, int> pi;
static_assert(!noexcept(pi.swap(pi)), ""); // expected-note {{in instantiation of}}