420 lines
20 KiB
C++
420 lines
20 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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typedef int (*fp)(int);
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int surrogate(int);
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struct Incomplete; // expected-note{{forward declaration of 'Incomplete'}} \
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// expected-note {{forward declaration of 'Incomplete'}}
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struct X {
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X() = default; // expected-note{{candidate constructor not viable: requires 0 arguments, but 1 was provided}}
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X(const X&) = default; // expected-note{{candidate constructor not viable: no known conversion from 'bool' to 'const X' for 1st argument}}
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X(bool b) __attribute__((enable_if(b, "chosen when 'b' is true"))); // expected-note{{candidate disabled: chosen when 'b' is true}}
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void f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero")));
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void f(int n) __attribute__((enable_if(n == 1, "chosen when 'n' is one"))); // expected-note{{member declaration nearly matches}} expected-note 2{{candidate disabled: chosen when 'n' is one}}
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void g(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))); // expected-note{{candidate disabled: chosen when 'n' is zero}}
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void h(int n, int m = 0) __attribute__((enable_if(m == 0, "chosen when 'm' is zero"))); // expected-note{{candidate disabled: chosen when 'm' is zero}}
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static void s(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))); // expected-note2{{candidate disabled: chosen when 'n' is zero}}
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void conflict(int n) __attribute__((enable_if(n+n == 10, "chosen when 'n' is five"))); // expected-note{{candidate function}}
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void conflict(int n) __attribute__((enable_if(n*2 == 10, "chosen when 'n' is five"))); // expected-note{{candidate function}}
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void hidden_by_argument_conversion(Incomplete n, int m = 0) __attribute__((enable_if(m == 10, "chosen when 'm' is ten")));
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Incomplete hidden_by_incomplete_return_value(int n = 0) __attribute__((enable_if(n == 10, "chosen when 'n' is ten"))); // expected-note{{'hidden_by_incomplete_return_value' declared here}}
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operator long() __attribute__((enable_if(true, "chosen on your platform")));
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operator int() __attribute__((enable_if(false, "chosen on other platform")));
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operator fp() __attribute__((enable_if(false, "never enabled"))) { return surrogate; } // expected-note{{conversion candidate of type 'int (*)(int)'}} // FIXME: the message is not displayed
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};
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void X::f(int n) __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))) // expected-note{{member declaration nearly matches}} expected-note 2{{candidate disabled: chosen when 'n' is zero}}
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{
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}
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void X::f(int n) __attribute__((enable_if(n == 2, "chosen when 'n' is two"))) // expected-error{{out-of-line definition of 'f' does not match any declaration in 'X'}}
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{
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}
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X x1(true);
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X x2(false); // expected-error{{no matching constructor for initialization of 'X'}}
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__attribute__((deprecated)) constexpr int old() { return 0; } // expected-note2{{'old' has been explicitly marked deprecated here}}
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void deprec1(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero"))); // expected-warning{{'old' is deprecated}}
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void deprec2(int i) __attribute__((enable_if(old() == 0, "chosen when old() is zero"))); // expected-warning{{'old' is deprecated}}
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void overloaded(int);
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void overloaded(long);
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struct Int {
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constexpr Int(int i) : i(i) { }
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constexpr operator int() const { return i; }
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int i;
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};
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void default_argument(int n, int m = 0) __attribute__((enable_if(m == 0, "chosen when 'm' is zero"))); // expected-note{{candidate disabled: chosen when 'm' is zero}}
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void default_argument_promotion(int n, int m = Int(0)) __attribute__((enable_if(m == 0, "chosen when 'm' is zero"))); // expected-note{{candidate disabled: chosen when 'm' is zero}}
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struct Nothing { };
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template<typename T> void typedep(T t) __attribute__((enable_if(t, ""))); // expected-note{{candidate disabled:}} expected-error{{value of type 'Nothing' is not contextually convertible to 'bool'}}
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template<int N> void valuedep() __attribute__((enable_if(N == 1, "")));
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// FIXME: we skip potential constant expression evaluation on value dependent
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// enable-if expressions
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int not_constexpr();
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template<int N> void valuedep() __attribute__((enable_if(N == not_constexpr(), "")));
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template <typename T> void instantiationdep() __attribute__((enable_if(sizeof(sizeof(T)) != 0, "")));
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void test() {
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X x;
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x.f(0);
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x.f(1);
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x.f(2); // expected-error{{no matching member function for call to 'f'}}
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x.f(3); // expected-error{{no matching member function for call to 'f'}}
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x.g(0);
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x.g(1); // expected-error{{no matching member function for call to 'g'}}
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x.h(0);
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x.h(1, 2); // expected-error{{no matching member function for call to 'h'}}
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x.s(0);
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x.s(1); // expected-error{{no matching member function for call to 's'}}
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X::s(0);
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X::s(1); // expected-error{{no matching member function for call to 's'}}
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x.conflict(5); // expected-error{{call to member function 'conflict' is ambiguous}}
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x.hidden_by_argument_conversion(10); // expected-error{{argument type 'Incomplete' is incomplete}}
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x.hidden_by_incomplete_return_value(10); // expected-error{{calling 'hidden_by_incomplete_return_value' with incomplete return type 'Incomplete'}}
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deprec2(0);
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overloaded(x);
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default_argument(0);
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default_argument(1, 2); // expected-error{{no matching function for call to 'default_argument'}}
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default_argument_promotion(0);
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default_argument_promotion(1, 2); // expected-error{{no matching function for call to 'default_argument_promotion'}}
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int i = x(1); // expected-error{{no matching function for call to object of type 'X'}}
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Nothing n;
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typedep(0); // expected-error{{no matching function for call to 'typedep'}}
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typedep(1);
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typedep(n); // expected-note{{in instantiation of function template specialization 'typedep<Nothing>' requested here}}
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}
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template <typename T> class C {
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void f() __attribute__((enable_if(T::expr == 0, ""))) {}
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void g() { f(); }
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};
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int fn3(bool b) __attribute__((enable_if(b, ""))); // FIXME: This test should net 0 error messages.
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template <class T> void test3() {
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fn3(sizeof(T) == 1); // expected-error{{no matching function for call to 'fn3'}} expected-note@-2{{candidate disabled}}
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}
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template <typename T>
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struct Y {
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T h(int n, int m = 0) __attribute__((enable_if(m == 0, "chosen when 'm' is zero"))); // expected-note{{candidate disabled: chosen when 'm' is zero}}
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};
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void test4() {
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Y<int> y;
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int t0 = y.h(0);
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int t1 = y.h(1, 2); // expected-error{{no matching member function for call to 'h'}}
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}
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// FIXME: issue an error (without instantiation) because ::h(T()) is not
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// convertible to bool, because return types aren't overloadable.
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void h(int);
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template <typename T> void outer() {
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void local_function() __attribute__((enable_if(::h(T()), "")));
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local_function(); // expected-error{{no matching function for call to 'local_function'}} expected-note@-1{{candidate disabled}}
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};
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namespace PR20988 {
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struct Integer {
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Integer(int);
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};
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int fn1(const Integer &) __attribute__((enable_if(true, "")));
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template <class T> void test1() {
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int &expr = T::expr();
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fn1(expr);
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}
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int fn2(const Integer &) __attribute__((enable_if(false, ""))); // expected-note{{candidate disabled}}
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template <class T> void test2() {
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int &expr = T::expr();
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fn2(expr); // expected-error{{no matching function for call to 'fn2'}}
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}
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int fn3(bool b) __attribute__((enable_if(b, ""))); // FIXME: This test should net 0 error messages.
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template <class T> void test3() {
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fn3(sizeof(T) == 1); // expected-error{{no matching function for call to 'fn3'}} expected-note@-2{{candidate disabled}}
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}
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}
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namespace FnPtrs {
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int ovlFoo(int m) __attribute__((enable_if(m > 0, "")));
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int ovlFoo(int m);
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void test() {
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// Assignment gives us a different code path than declarations, and `&foo`
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// gives us a different code path than `foo`
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int (*p)(int) = ovlFoo;
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int (*p2)(int) = &ovlFoo;
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int (*a)(int);
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a = ovlFoo;
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a = &ovlFoo;
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}
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int ovlBar(int) __attribute__((enable_if(true, "")));
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int ovlBar(int m) __attribute__((enable_if(false, "")));
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void test2() {
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int (*p)(int) = ovlBar;
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int (*p2)(int) = &ovlBar;
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int (*a)(int);
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a = ovlBar;
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a = &ovlBar;
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}
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int ovlConflict(int m) __attribute__((enable_if(true, "")));
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int ovlConflict(int m) __attribute__((enable_if(1, "")));
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void test3() {
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int (*p)(int) = ovlConflict; // expected-error{{address of overloaded function 'ovlConflict' is ambiguous}} expected-note@191{{candidate function}} expected-note@192{{candidate function}}
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int (*p2)(int) = &ovlConflict; // expected-error{{address of overloaded function 'ovlConflict' is ambiguous}} expected-note@191{{candidate function}} expected-note@192{{candidate function}}
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int (*a)(int);
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a = ovlConflict; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@191{{candidate function}} expected-note@192{{candidate function}}
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a = &ovlConflict; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@191{{candidate function}} expected-note@192{{candidate function}}
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}
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template <typename T>
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T templated(T m) __attribute__((enable_if(true, ""))) { return T(); }
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template <typename T>
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T templated(T m) __attribute__((enable_if(false, ""))) { return T(); }
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void test4() {
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int (*p)(int) = templated<int>;
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int (*p2)(int) = &templated<int>;
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int (*a)(int);
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a = templated<int>;
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a = &templated<int>;
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}
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template <typename T>
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T templatedBar(T m) __attribute__((enable_if(m > 0, ""))) { return T(); }
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void test5() {
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int (*p)(int) = templatedBar<int>; // expected-error{{address of overloaded function 'templatedBar' does not match required type 'int (int)'}} expected-note@214{{candidate function made ineligible by enable_if}}
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int (*p2)(int) = &templatedBar<int>; // expected-error{{address of overloaded function 'templatedBar' does not match required type 'int (int)'}} expected-note@214{{candidate function made ineligible by enable_if}}
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int (*a)(int);
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a = templatedBar<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@214{{candidate function made ineligible by enable_if}}
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a = &templatedBar<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@214{{candidate function made ineligible by enable_if}}
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}
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template <typename T>
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T templatedConflict(T m) __attribute__((enable_if(false, ""))) { return T(); }
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template <typename T>
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T templatedConflict(T m) __attribute__((enable_if(true, ""))) { return T(); }
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template <typename T>
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T templatedConflict(T m) __attribute__((enable_if(1, ""))) { return T(); }
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void test6() {
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int (*p)(int) = templatedConflict<int>; // expected-error{{address of overloaded function 'templatedConflict' is ambiguous}} expected-note@224{{candidate function made ineligible by enable_if}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
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int (*p0)(int) = &templatedConflict<int>; // expected-error{{address of overloaded function 'templatedConflict' is ambiguous}} expected-note@224{{candidate function made ineligible by enable_if}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
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int (*a)(int);
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a = templatedConflict<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
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a = &templatedConflict<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
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}
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int ovlNoCandidate(int m) __attribute__((enable_if(false, "")));
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int ovlNoCandidate(int m) __attribute__((enable_if(0, "")));
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void test7() {
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int (*p)(int) = ovlNoCandidate; // expected-error{{address of overloaded function 'ovlNoCandidate' does not match required type}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
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int (*p2)(int) = &ovlNoCandidate; // expected-error{{address of overloaded function 'ovlNoCandidate' does not match required type}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
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int (*a)(int);
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a = ovlNoCandidate; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
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a = &ovlNoCandidate; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
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}
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int noOvlNoCandidate(int m) __attribute__((enable_if(false, "")));
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void test8() {
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int (*p)(int) = noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
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int (*p2)(int) = &noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
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int (*a)(int);
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a = noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
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a = &noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
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}
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}
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namespace casting {
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using VoidFnTy = void (*)();
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void foo(void *c) __attribute__((enable_if(0, "")));
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void foo(int *c) __attribute__((enable_if(c, "")));
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void foo(char *c) __attribute__((enable_if(1, "")));
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void testIt() {
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auto A = reinterpret_cast<VoidFnTy>(foo);
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auto AAmp = reinterpret_cast<VoidFnTy>(&foo);
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using VoidFooTy = void (*)(void *);
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auto B = reinterpret_cast<VoidFooTy>(foo);
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auto BAmp = reinterpret_cast<VoidFooTy>(&foo);
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using IntFooTy = void (*)(int *);
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auto C = reinterpret_cast<IntFooTy>(foo);
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auto CAmp = reinterpret_cast<IntFooTy>(&foo);
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using CharFooTy = void (*)(void *);
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auto D = reinterpret_cast<CharFooTy>(foo);
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auto DAmp = reinterpret_cast<CharFooTy>(&foo);
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}
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void testItCStyle() {
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auto A = (VoidFnTy)foo;
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auto AAmp = (VoidFnTy)&foo;
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using VoidFooTy = void (*)(void *);
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auto B = (VoidFooTy)foo;
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auto BAmp = (VoidFooTy)&foo;
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using IntFooTy = void (*)(int *);
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auto C = (IntFooTy)foo;
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auto CAmp = (IntFooTy)&foo;
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using CharFooTy = void (*)(void *);
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auto D = (CharFooTy)foo;
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auto DAmp = (CharFooTy)&foo;
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}
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}
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namespace casting_templates {
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template <typename T> void foo(T) {} // expected-note 4 {{candidate function}}
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void foo(int *c) __attribute__((enable_if(c, ""))); //expected-note 4 {{candidate function}}
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void foo(char *c) __attribute__((enable_if(c, ""))); //expected-note 4 {{candidate function}}
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void testIt() {
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using IntFooTy = void (*)(int *);
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auto A = reinterpret_cast<IntFooTy>(foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto ARef = reinterpret_cast<IntFooTy>(&foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto AExplicit = reinterpret_cast<IntFooTy>(foo<int*>);
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using CharFooTy = void (*)(char *);
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auto B = reinterpret_cast<CharFooTy>(foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto BRef = reinterpret_cast<CharFooTy>(&foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto BExplicit = reinterpret_cast<CharFooTy>(foo<char*>);
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}
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void testItCStyle() {
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// constexpr is usable here because all of these should become static_casts.
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using IntFooTy = void (*)(int *);
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constexpr auto A = (IntFooTy)foo;
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constexpr auto ARef = (IntFooTy)&foo;
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constexpr auto AExplicit = (IntFooTy)foo<int*>;
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using CharFooTy = void (*)(char *);
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constexpr auto B = (CharFooTy)foo;
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constexpr auto BRef = (CharFooTy)&foo;
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constexpr auto BExplicit = (CharFooTy)foo<char*>;
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static_assert(A == ARef && ARef == AExplicit, "");
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static_assert(B == BRef && BRef == BExplicit, "");
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}
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}
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namespace multiple_matches {
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using NoMatchTy = void (*)();
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void foo(float *c); //expected-note 4 {{candidate function}}
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void foo(int *c) __attribute__((enable_if(1, ""))); //expected-note 4 {{candidate function}}
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void foo(char *c) __attribute__((enable_if(1, ""))); //expected-note 4 {{candidate function}}
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void testIt() {
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auto A = reinterpret_cast<NoMatchTy>(foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto ARef = reinterpret_cast<NoMatchTy>(&foo); // expected-error{{reinterpret_cast cannot resolve overloaded function 'foo' to type}}
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auto C = (NoMatchTy)foo; // expected-error{{address of overloaded function 'foo' does not match required type 'void ()'}}
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auto CRef = (NoMatchTy)&foo; // expected-error{{address of overloaded function 'foo' does not match required type 'void ()'}}
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}
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}
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namespace PR27122 {
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// (slightly reduced) code that motivated the bug...
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namespace ns {
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void Function(int num)
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__attribute__((enable_if(num != 0, "")));
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void Function(int num, int a0)
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__attribute__((enable_if(num != 1, "")));
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} // namespace ns
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using ns::Function; // expected-note 3{{declared here}}
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void Run() {
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Functioon(0); // expected-error{{use of undeclared identifier}} expected-error{{too few arguments}}
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Functioon(0, 1); // expected-error{{use of undeclared identifier}}
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Functioon(0, 1, 2); // expected-error{{use of undeclared identifier}}
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}
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// Extra tests
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void regularEnableIf(int a) __attribute__((enable_if(a, ""))); // expected-note 3{{declared here}} expected-note 3{{candidate function not viable}}
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void runRegularEnableIf() {
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regularEnableIf(0, 2); // expected-error{{no matching function}}
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regularEnableIf(1, 2); // expected-error{{no matching function}}
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regularEnableIf(); // expected-error{{no matching function}}
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// Test without getting overload resolution involved
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::PR27122::regularEnableIf(0, 2); // expected-error{{too many arguments}}
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::PR27122::regularEnableIf(1, 2); // expected-error{{too many arguments}}
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::PR27122::regularEnableIf(); // expected-error{{too few arguments}}
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}
|
|
|
|
struct Foo {
|
|
void bar(int i) __attribute__((enable_if(i, ""))); // expected-note 2{{declared here}}
|
|
};
|
|
|
|
void runFoo() {
|
|
Foo f;
|
|
f.bar(); // expected-error{{too few arguments}}
|
|
f.bar(1, 2); // expected-error{{too many arguments}}
|
|
}
|
|
}
|
|
|
|
// Ideally, we should be able to handle value-dependent expressions sanely.
|
|
// Sadly, that isn't the case at the moment.
|
|
namespace dependent {
|
|
int error(int N) __attribute__((enable_if(N, ""))); // expected-note{{candidate disabled}}
|
|
int error(int N) __attribute__((enable_if(!N, ""))); // expected-note{{candidate disabled}}
|
|
template <int N> int callUnavailable() {
|
|
return error(N); // expected-error{{no matching function for call to 'error'}}
|
|
}
|
|
|
|
constexpr int noError(int N) __attribute__((enable_if(N, ""))) { return -1; }
|
|
constexpr int noError(int N) __attribute__((enable_if(!N, ""))) { return -1; }
|
|
constexpr int noError(int N) { return 0; }
|
|
|
|
template <int N>
|
|
constexpr int callNoError() { return noError(N); }
|
|
static_assert(callNoError<0>() == 0, "");
|
|
static_assert(callNoError<1>() == 0, "");
|
|
|
|
template <int N> constexpr int templated() __attribute__((enable_if(N, ""))) {
|
|
return 1;
|
|
}
|
|
|
|
constexpr int A = templated<0>(); // expected-error{{no matching function for call to 'templated'}} expected-note@-4{{candidate disabled}}
|
|
static_assert(templated<1>() == 1, "");
|
|
|
|
template <int N> constexpr int callTemplated() { return templated<N>(); }
|
|
|
|
constexpr int B = callTemplated<0>(); // expected-error{{initialized by a constant expression}} expected-error@-2{{no matching function for call to 'templated'}} expected-note{{in instantiation of function template}} expected-note@-9{{candidate disabled}}
|
|
static_assert(callTemplated<1>() == 1, "");
|
|
}
|