// RUN: %clang_cc1 -fsyntax-only -std=c++98 -Wconversion -verify %s
template<int N> struct A; // expected-note 5{{template parameter is declared here}}
A<0> *a0;
A<int()> *a1; // expected-error{{template argument for non-type template parameter is treated as function type 'int ()'}}
A<int> *a2; // expected-error{{template argument for non-type template parameter must be an expression}}
A<1 >> 2> *a3; // expected-warning{{use of right-shift operator ('>>') in template argument will require parentheses in C++11}}
// C++ [temp.arg.nontype]p5:
A<A> *a4; // expected-error{{must be an expression}}
enum E { Enumerator = 17 };
A<E> *a5; // expected-error{{template argument for non-type template parameter must be an expression}}
template<E Value> struct A1; // expected-note{{template parameter is declared here}}
A1<Enumerator> *a6; // okay
A1<17> *a7; // expected-error{{non-type template argument of type 'int' cannot be converted to a value of type 'E'}}
const long LongValue = 12345678;
A<LongValue> *a8;
const short ShortValue = 17;
A<ShortValue> *a9;
int f(int);
A<f(17)> *a10; // expected-error{{non-type template argument of type 'int' is not an integral constant expression}}
class X {
public:
X();
X(int, int);
operator int() const;
};
A<X(17, 42)> *a11; // expected-error{{non-type template argument of type 'X' must have an integral or enumeration type}}
float f(float);
float g(float); // expected-note 2{{candidate function}}
double g(double); // expected-note 2{{candidate function}}
int h(int);
float h2(float);
template<int fp(int)> struct A3; // expected-note 1{{template parameter is declared here}}
A3<h> *a14_1;
A3<&h> *a14_2;
A3<f> *a14_3;
A3<&f> *a14_4;
A3<h2> *a14_6; // expected-error{{non-type template argument of type 'float (float)' cannot be converted to a value of type 'int (*)(int)'}}
A3<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}}
struct Y { } y;
volatile X * X_volatile_ptr;
template<X const &AnX> struct A4; // expected-note 2{{template parameter is declared here}}
X an_X;
A4<an_X> *a15_1; // okay
A4<*X_volatile_ptr> *a15_2; // expected-error{{non-type template argument does not refer to any declaration}}
A4<y> *15_3; // expected-error{{non-type template parameter of reference type 'const X &' cannot bind to template argument of type 'struct Y'}} \
// FIXME: expected-error{{expected unqualified-id}}
template<int (&fr)(int)> struct A5; // expected-note{{template parameter is declared here}}
A5<h> *a16_1;
A5<f> *a16_3;
A5<h2> *a16_6; // expected-error{{non-type template parameter of reference type 'int (&)(int)' cannot bind to template argument of type 'float (float)'}}
A5<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}}
struct Z {
int foo(int);
float bar(float);
int bar(int);
double baz(double);
int int_member;
float float_member;
union {
int union_member;
};
};
template<int (Z::*pmf)(int)> struct A6; // expected-note{{template parameter is declared here}}
A6<&Z::foo> *a17_1;
A6<&Z::bar> *a17_2;
A6<&Z::baz> *a17_3; // expected-error-re{{non-type template argument of type 'double (Z::*)(double){{( __attribute__\(\(thiscall\)\))?}}' cannot be converted to a value of type 'int (Z::*)(int){{( __attribute__\(\(thiscall\)\))?}}'}}
template<int Z::*pm> struct A7; // expected-note{{template parameter is declared here}}
template<int Z::*pm> struct A7c;
A7<&Z::int_member> *a18_1;
A7c<&Z::int_member> *a18_2;
A7<&Z::float_member> *a18_3; // expected-error{{non-type template argument of type 'float Z::*' cannot be converted to a value of type 'int Z::*'}}
A7c<(&Z::int_member)> *a18_4; // expected-warning{{address non-type template argument cannot be surrounded by parentheses}}
A7c<&Z::union_member> *a18_5;
template<unsigned char C> struct Overflow; // expected-note{{template parameter is declared here}}
Overflow<5> *overflow1; // okay
Overflow<255> *overflow2; // okay
Overflow<256> *overflow3; // expected-warning{{non-type template argument value '256' truncated to '0' for template parameter of type 'unsigned char'}}
template<unsigned> struct Signedness; // expected-note{{template parameter is declared here}}
Signedness<10> *signedness1; // okay
Signedness<-10> *signedness2; // expected-warning{{non-type template argument with value '-10' converted to '4294967286' for unsigned template parameter of type 'unsigned int'}}
template<signed char C> struct SignedOverflow; // expected-note 3 {{template parameter is declared here}}
SignedOverflow<1> *signedoverflow1;
SignedOverflow<-1> *signedoverflow2;
SignedOverflow<-128> *signedoverflow3;
SignedOverflow<-129> *signedoverflow4; // expected-warning{{non-type template argument value '-129' truncated to '127' for template parameter of type 'signed char'}}
SignedOverflow<127> *signedoverflow5;
SignedOverflow<128> *signedoverflow6; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}}
SignedOverflow<(unsigned char)128> *signedoverflow7; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}}
// Check canonicalization of template arguments.
template<int (*)(int, int)> struct FuncPtr0;
int func0(int, int);
extern FuncPtr0<&func0> *fp0;
template<int (*)(int, int)> struct FuncPtr0;
extern FuncPtr0<&func0> *fp0;
int func0(int, int);
extern FuncPtr0<&func0> *fp0;
// PR5350
namespace ns {
template <typename T>
struct Foo {
static const bool value = true;
};
template <bool b>
struct Bar {};
const bool value = false;
Bar<bool(ns::Foo<int>::value)> x;
}
// PR5349
namespace ns {
enum E { k };
template <E e>
struct Baz {};
Baz<k> f1; // This works.
Baz<E(0)> f2; // This too.
Baz<static_cast<E>(0)> f3; // And this.
Baz<ns::E(0)> b1; // This doesn't work.
Baz<static_cast<ns::E>(0)> b2; // This neither.
}
// PR5597
template<int (*)(float)> struct X0 { };
struct X1 {
static int pfunc(float);
};
void test_X0_X1() {
X0<X1::pfunc> x01;
}
// PR6249
namespace pr6249 {
template<typename T, T (*func)()> T f() {
return func();
}
int h();
template int f<int, h>();
}
namespace PR6723 {
template<unsigned char C> void f(int (&a)[C]); // expected-note 3{{candidate template ignored: substitution failure [with C = '\x00']}}
// expected-note@-1 {{not viable: no known conversion from 'int[512]' to 'int (&)[0]'}}
void g() {
int arr512[512];
f(arr512); // expected-error{{no matching function for call}}
f<512>(arr512); // expected-error{{no matching function for call}}
int arr0[0];
f(arr0); // expected-error{{no matching function for call}}
f<0>(arr0); // expected-error{{no matching function for call}}
}
}
// Check that we instantiate declarations whose addresses are taken
// for non-type template arguments.
namespace EntityReferenced {
template<typename T, void (*)(T)> struct X { };
template<typename T>
struct Y {
static void f(T x) {
x = 1; // expected-error{{incompatible integer to pointer conversion assigning to 'int *' from 'int'}}
}
};
void g() {
typedef X<int*, Y<int*>::f> x; // expected-note{{in instantiation of}}
}
}
namespace PR6964 {
template <typename ,int, int = 9223372036854775807L > // expected-warning {{non-type template argument value '9223372036854775807' truncated to '-1' for template parameter of type 'int'}} \
// expected-note {{template parameter is declared here}}
struct as_nview { };
template <typename Sequence, int I0>
struct as_nview<Sequence, I0> // expected-note{{while checking a default template argument used here}}
{ };
}
namespace test8 {
template <int* ip> struct A {
int* p;
A() : p(ip) {}
};
void test0() {
extern int i00;
A<&i00> a00;
}
extern int i01;
void test1() {
A<&i01> a01;
}
struct C {
int x;
char y;
double z;
};
template <C* cp> struct B {
C* p;
B() : p(cp) {}
};
void test2() {
extern C c02;
B<&c02> b02;
}
extern C c03;
void test3() {
B<&c03> b03;
}
}
namespace PR8372 {
template <int I> void foo() { } // expected-note{{template parameter is declared here}}
void bar() { foo <0x80000000> (); } // expected-warning{{non-type template argument value '2147483648' truncated to '-2147483648' for template parameter of type 'int'}}
}
namespace PR9227 {
template <bool B> struct enable_if_bool { };
template <> struct enable_if_bool<true> { typedef int type; }; // expected-note{{'enable_if_bool<true>::type' declared here}}
void test_bool() { enable_if_bool<false>::type i; } // expected-error{{enable_if_bool<false>'; did you mean 'enable_if_bool<true>::type'?}}
template <char C> struct enable_if_char { };
template <> struct enable_if_char<'a'> { typedef int type; }; // expected-note 5{{'enable_if_char<'a'>::type' declared here}}
void test_char_0() { enable_if_char<0>::type i; } // expected-error{{enable_if_char<'\x00'>'; did you mean 'enable_if_char<'a'>::type'?}}
void test_char_b() { enable_if_char<'b'>::type i; } // expected-error{{enable_if_char<'b'>'; did you mean 'enable_if_char<'a'>::type'?}}
void test_char_possibly_negative() { enable_if_char<'\x02'>::type i; } // expected-error{{enable_if_char<'\x02'>'; did you mean 'enable_if_char<'a'>::type'?}}
void test_char_single_quote() { enable_if_char<'\''>::type i; } // expected-error{{enable_if_char<'\''>'; did you mean 'enable_if_char<'a'>::type'?}}
void test_char_backslash() { enable_if_char<'\\'>::type i; } // expected-error{{enable_if_char<'\\'>'; did you mean 'enable_if_char<'a'>::type'?}}
template <int N> struct enable_if_int {};
template <> struct enable_if_int<1> { typedef int type; }; // expected-note{{'enable_if_int<1>::type' declared here}}
void test_int() { enable_if_int<2>::type i; } // expected-error{{enable_if_int<2>'; did you mean 'enable_if_int<1>::type'?}}
template <unsigned int N> struct enable_if_unsigned_int {};
template <> struct enable_if_unsigned_int<1> { typedef int type; }; // expected-note{{'enable_if_unsigned_int<1>::type' declared here}}
void test_unsigned_int() { enable_if_unsigned_int<2>::type i; } // expected-error{{enable_if_unsigned_int<2>'; did you mean 'enable_if_unsigned_int<1>::type'?}}
template <unsigned long long N> struct enable_if_unsigned_long_long {};
template <> struct enable_if_unsigned_long_long<1> { typedef int type; }; // expected-note{{'enable_if_unsigned_long_long<1>::type' declared here}}
void test_unsigned_long_long() { enable_if_unsigned_long_long<2>::type i; } // expected-error{{enable_if_unsigned_long_long<2>'; did you mean 'enable_if_unsigned_long_long<1>::type'?}}
template <long long N> struct enable_if_long_long {};
template <> struct enable_if_long_long<1> { typedef int type; }; // expected-note{{'enable_if_long_long<1>::type' declared here}}
void test_long_long() { enable_if_long_long<2>::type i; } // expected-error{{enable_if_long_long<2>'; did you mean 'enable_if_long_long<1>::type'?}}
}
namespace PR10579 {
namespace fcppt
{
namespace container
{
namespace bitfield
{
template<
typename Enum,
Enum Size
>
class basic;
template<
typename Enum,
Enum Size
>
class basic
{
public:
basic()
{
}
};
}
}
}
namespace
{
namespace testenum
{
enum type
{
foo,
bar,
size
};
}
}
int main()
{
typedef fcppt::container::bitfield::basic<
testenum::type,
testenum::size
> bitfield_foo;
bitfield_foo obj;
}
}
template <int& I> struct PR10766 { static int *ip; };
template <int& I> int* PR10766<I>::ip = &I;
namespace rdar13000548 {
template<typename R, typename U, R F>
U f() { return &F; } // expected-error{{cannot take the address of an rvalue of type 'int (*)(int)'}} expected-error{{cannot take the address of an rvalue of type 'int *'}}
int g(int);
int y[3];
void test()
{
f<int(int), int (*)(int), g>(); // expected-note{{in instantiation of}}
f<int[3], int*, y>(); // expected-note{{in instantiation of}}
}
}
namespace rdar13806270 {
template <unsigned N> class X { };
const unsigned value = 32;
struct Y {
X<value + 1> x;
};
void foo() {}
}
namespace PR17696 {
struct a {
union {
int i;
};
};
template <int (a::*p)> struct b : a {
b() { this->*p = 0; }
};
b<&a::i> c; // okay
}
namespace partial_order_different_types {
template<int, int, typename T, typename, T> struct A;
// expected-note@-1 {{template is declared here}}
template<int N, typename T, typename U, T V> struct A<0, N, T, U, V> {};
template<int N, typename T, typename U, U V> struct A<0, N, T, U, V>;
// expected-error@-1 {{class template partial specialization is not more specialized than the primary template}}
A<0, 0, int, int, 0> a;
}
namespace partial_order_references {
// FIXME: The standard does not appear to consider the second specialization
// to be more specialized than the first! The problem is that deducing
// an 'int&' parameter from an argument 'R' results in a type mismatch,
// because the parameter has a reference type and the argument is an
// expression and thus does not have reference type. We resolve this by
// matching the type of an expression corresponding to the parameter rather
// than matching the parameter itself.
template <int, int, int &> struct A {};
template <int N, int &R> struct A<N, 0, R> {};
template <int &R> struct A<0, 0, R> {};
int N;
A<0, 0, N> a;
template<int, int &R> struct B; // expected-note 2{{template}}
template<const int &R> struct B<0, R> {};
// expected-error@-1 {{not more specialized than the primary}}
// expected-note@-2 {{'const int' vs 'int &'}}
B<0, N> b; // expected-error {{undefined}}
template<int, const int &R> struct C; // expected-note 2{{template}}
template<int &R> struct C<0, R> {};
// expected-error@-1 {{not more specialized than the primary}}
// expected-note@-2 {{'int' vs 'const int &'}}
C<0, N> c; // expected-error {{undefined}}
template<int, const int &R> struct D; // expected-note 2{{template}}
template<int N> struct D<0, N> {};
// expected-error@-1 {{not more specialized than the primary}}
// expected-note@-2 {{'int' vs 'const int &'}}
extern const int K = 5;
D<0, K> d; // expected-error {{undefined}}
}
namespace dependent_nested_partial_specialization {
template<typename> using X = int; // expected-warning {{C++11}}
template<typename T> using Y = T*; // expected-warning {{C++11}}
int n;
template<template<typename> class X> struct A {
template<typename T, X<T> N> struct B; // expected-note 2{{here}}
template <typename T> struct B<T, 0> {}; // expected-error {{non-type template argument specializes a template parameter with dependent type 'Y<T>' (aka 'T *')}}
};
A<X>::B<int, 0> ax;
A<Y>::B<int, &n> ay; // expected-error {{undefined}} expected-note {{instantiation of}}
template<template<typename> class X> struct C {
template<typename T, int N, int M> struct D; // expected-note {{here}}
template<typename T, X<T> N> struct D<T*, N, N + 1> {}; // expected-error {{type of specialized non-type template argument depends on}}
};
C<X>::D<int*, 0, 1> cx;
C<Y>::D<int*, 0, 1> cy; // expected-error {{undefined}} expected-note {{instantiation of}}
template<typename T> struct E {
template<typename U, U V> struct F; // expected-note {{template}}
template<typename W, T V> struct F<W, V> {}; // expected-error {{not more specialized than the primary}}
};
E<int>::F<int, 0> e1; // expected-note {{instantiation of}}
}
namespace nondependent_default_arg_ordering {
int n, m;
template<typename A, A B = &n> struct X {};
template<typename A> void f(X<A>);
// expected-note@-1 {{candidate function}}
template<typename A> void f(X<A, &m>);
// expected-note@-1 {{candidate function}}
template<typename A, A B> void f(X<A, B>);
// expected-note@-1 2{{candidate function}}
template<template<typename U, U> class T, typename A, int *B> void f(T<A, B>);
// expected-note@-1 2{{candidate function}}
// FIXME: When partial ordering, we get an inconsistent deduction between
// `A` (type-parameter-0-0) and `int *`, when deducing the first parameter.
// The deduction mechanism needs to be extended to be able to correctly
// handle these cases where the argument's template parameters appear in
// the result.
void g() {
X<int *, &n> x; f(x); // expected-error {{call to 'f' is ambiguous}}
X<int *, &m> y; f(y); // expected-error {{call to 'f' is ambiguous}}
}
}
namespace pointer_to_char_array {
typedef char T[4];
template<T *P> struct A { void f(); };
template<T *P> void A<P>::f() {}
T foo = "foo";
void g() { A<&foo>().f(); }
}
namespace dependent_backreference {
struct Incomplete; // expected-note 2{{forward declaration}}
Incomplete f(int); // expected-note 2{{here}}
int f(short);
template<typename T, T Value, int(*)[sizeof(f(Value))]> struct X {}; // expected-error 2{{incomplete}}
int arr[sizeof(int)];
// When checking this template-id, we must not treat 'Value' as having type
// 'int'; its type is the dependent type 'T'.
template<typename T> void f() { X<T, 0, &arr> x; } // expected-note {{substituting}}
void g() { f<short>(); }
void h() { f<int>(); } // expected-note {{instantiation}}
// The second of these is OK to diagnose eagerly because 'Value' has the
// non-dependent type 'int'.
template<short S> void a() { X<short, S, &arr> x; }
template<short S> void b() { X<int, S, &arr> x; } // expected-note {{substituting}}
}
namespace instantiation_dependent {
template<typename T, __typeof(sizeof(T))> void f(int);
template<typename T, __typeof(sizeof(0))> int &f(...);
int &rf = f<struct incomplete, 0>(0);
int arr[sizeof(sizeof(int))];
template<typename T, int (*)[sizeof(sizeof(T))]> void g(int);
template<typename T, int (*)[sizeof(sizeof(int))]> int &g(...);
int &rg = g<struct incomplete, &arr>(0);
}
namespace complete_array_from_incomplete {
template <typename T, const char* const A[static_cast<int>(T::kNum)]>
class Base {};
template <class T, const char* const A[]>
class Derived : public Base<T, A> {};
struct T {
static const int kNum = 3;
};
extern const char *const kStrs[3] = {};
Derived<T, kStrs> d;
}
namespace type_of_pack {
template<typename ...T> struct A { // expected-warning 0-1{{extension}}
template<T *...V> void f() {
g(V.f() ...); // expected-error {{base type 'T *' is not a structure or union}}
}
};
}
namespace match_type_after_substitution {
template<typename T> struct X {};
X<int> y;
template<typename T, X<T> &Y> struct B {
typedef B<T, Y> Self;
};
// These two formulations should resolve to the same type.
typedef B<int, y> Z;
typedef Z::Self Z;
}
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