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// RUN: %clang_cc1 -std=c++1z -ast-print %s > %t
// RUN: FileCheck < %t %s -check-prefix=CHECK1
// RUN: FileCheck < %t %s -check-prefix=CHECK2
// RUN: %clang_cc1 -std=c++1z -ast-dump %s | FileCheck --check-prefix=DUMP %s
template <int X, typename Y, int Z = 5>
struct foo {
int constant;
foo() {}
Y getSum() { return Y(X + Z); }
};
template <int A, typename B>
B bar() {
return B(A);
}
void baz() {
int x = bar<5, int>();
int y = foo<5, int>().getSum();
double z = foo<2, double, 3>().getSum();
}
// Template definition - foo
// CHECK1: template <int X, typename Y, int Z = 5> struct foo {
// CHECK2: template <int X, typename Y, int Z = 5> struct foo {
// Template instantiation - foo
// Since the order of instantiation may vary during runs, run FileCheck twice
// to make sure each instantiation is in the correct spot.
// CHECK1: template<> struct foo<5, int, 5> {
// CHECK2: template<> struct foo<2, double, 3> {
// Template definition - bar
// CHECK1: template <int A, typename B> B bar()
// CHECK2: template <int A, typename B> B bar()
// Template instantiation - bar
// CHECK1: template<> int bar<5, int>()
// CHECK2: template<> int bar<5, int>()
// CHECK1-LABEL: template <typename ...T> struct A {
// CHECK1-NEXT: template <T ...x[3]> struct B {
template <typename ...T> struct A {
template <T ...x[3]> struct B {};
};
// CHECK1-LABEL: template <typename ...T> void f(T ...[3]) {
// CHECK1-NEXT: A<T[3]...> a;
template <typename ...T> void f(T ...[3]) {
A<T[3]...> a;
}
namespace test2 {
void func(int);
void func(float);
template<typename T>
void tmpl() {
func(T());
}
// DUMP: UnresolvedLookupExpr {{.*}} <col:3> '<overloaded function type>' lvalue (ADL) = 'func'
}
namespace test3 {
template<typename T> struct A {};
template<typename T> A(T) -> A<int>;
// CHECK1: template <typename T> A(T) -> A<int>;
}
namespace test4 {
template <unsigned X, auto A>
struct foo {
static void fn();
};
// Prints using an "integral" template argument. Test that this correctly
// includes the type for the auto argument and omits it for the fixed
// type/unsigned argument (see
// TemplateParameterList::shouldIncludeTypeForArgument)
// CHECK1: {{^ }}template<> struct foo<0, 0L> {
// CHECK1: {{^ }}void test(){{ }}{
// CHECK1: {{^ }}foo<0, 0 + 0L>::fn();
void test() {
foo<0, 0 + 0L>::fn();
}
// Prints using an "expression" template argument. This renders based on the way
// the user wrote the arguments (including that + expression) - so it's not
// powered by the shouldIncludeTypeForArgument functionality.
// Not sure if this it's intentional that these two specializations are rendered
// differently in this way.
// CHECK1: {{^ }}template<> struct foo<1, 0 + 0L> {
template struct foo<1, 0 + 0L>;
}
namespace test5 {
template<long> void f() {}
void (*p)() = f<0>;
template<unsigned = 0> void f() {}
void (*q)() = f<>;
// Not perfect - this code in the dump would be ambiguous, but it's the best we
// can do to differentiate these two implicit specializations.
// CHECK1: template<> void f<0L>()
// CHECK1: template<> void f<0U>()
}
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