Files
llvm-project/clang/test/SemaTemplate/function-template-specialization.cpp
Larisse Voufo 98b20f1278 FIXME fix: improving diagnostics for template arguments deduction of class templates and explicit specializations
This patch essentially removes all the FIXMEs following calls to DeduceTemplateArguments() that want to keep track of deduction failure info.

llvm-svn: 186730
2013-07-19 23:00:19 +00:00

59 lines
1.9 KiB
C++

// RUN: %clang_cc1 -fsyntax-only -verify %s
template <int N>
void f0(int (&array)[N]); // expected-note {{candidate template ignored: could not match 'int' against 'char'}}
// Simple function template specialization (using overloading)
template<> void f0(int (&array)[1]);
void test_f0() {
int iarr1[1];
f0(iarr1);
}
// Function template specialization where there are no matches
template<> void f0(char (&array)[1]); // expected-error{{no function template matches}}
template<> void f0<2>(int (&array)[2]) { }
// Function template specialization that requires partial ordering
template<typename T, int N> void f1(T (&array)[N]); // expected-note{{matches}}
template<int N> void f1(int (&array)[N]); // expected-note{{matches}}
template<> void f1(float (&array)[1]);
template<> void f1(int (&array)[1]);
// Function template specialization that results in an ambiguity
template<typename T> void f1(T (&array)[17]); // expected-note{{matches}}
template<> void f1(int (&array)[17]); // expected-error{{ambiguous}}
// Resolving that ambiguity with explicitly-specified template arguments.
template<int N> void f2(double (&array)[N]);
template<typename T> void f2(T (&array)[42]);
template<> void f2<double>(double (&array)[42]);
template<> void f2<42>(double (&array)[42]);
void f2<25>(double (&array)[25]); // expected-error{{specialization}}
// PR5833
namespace PR5833 {
template <typename T> bool f0(T &t1);
template <> bool f0<float>(float &t1);
}
template <> bool PR5833::f0<float>(float &t1) {}
// PR8295
namespace PR8295 {
template <typename T> void f(T t) {}
template <typename T> void f<T*>(T* t) {} // expected-error{{function template partial specialization is not allowed}}
}
class Foo {
template<class T>
static void Bar(const T& input);
// Don't crash here.
template<>
static void Bar(const long& input) {} // expected-error{{explicit specialization of 'Bar' in class scope}}
};