llvm-project/clang/test/SemaCXX/overload-call.cpp

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// RUN: clang -fsyntax-only -pedantic -verify %s
int* f(int);
float* f(float);
void f();
void test_f(int iv, float fv) {
float* fp = f(fv);
int* ip = f(iv);
}
int* g(int, float, int); // expected-note {{ candidate function }}
float* g(int, int, int); // expected-note {{ candidate function }}
double* g(int, float, float); // expected-note {{ candidate function }}
char* g(int, float, ...); // expected-note {{ candidate function }}
void g();
void test_g(int iv, float fv) {
int* ip1 = g(iv, fv, 0);
float* fp1 = g(iv, iv, 0);
double* dp1 = g(iv, fv, fv);
char* cp1 = g(0, 0);
char* cp2 = g(0, 0, 0, iv, fv);
double* dp2 = g(0, fv, 1.5); // expected-error {{ call to 'g' is ambiguous; candidates are: }}
}
double* h(double f);
int* h(int);
void test_h(float fv, unsigned char cv) {
double* dp = h(fv);
int* ip = h(cv);
}
int* i(int);
double* i(long);
void test_i(short sv, int iv, long lv, unsigned char ucv) {
int* ip1 = i(sv);
int* ip2 = i(iv);
int* ip3 = i(ucv);
double* dp1 = i(lv);
}
int* j(void*);
double* j(bool);
void test_j(int* ip) {
int* ip1 = j(ip);
}
int* k(char*);
double* k(bool);
void test_k() {
int* ip1 = k("foo");
double* dp1 = k(L"foo");
}
int* l(wchar_t*);
double* l(bool);
void test_l() {
int* ip1 = l(L"foo");
double* dp1 = l("foo");
}
int* m(const char*);
double* m(char*);
void test_m() {
int* ip = m("foo");
}
int* n(char*);
double* n(void*);
void test_n() {
char ca[7];
int* ip1 = n(ca);
int* ip2 = n("foo");
float fa[7];
double* dp1 = n(fa);
}
enum PromotesToInt {
PromotesToIntValue = 1
};
enum PromotesToUnsignedInt {
PromotesToUnsignedIntValue = (unsigned int)-1
};
int* o(int);
double* o(unsigned int);
float* o(long);
void test_o() {
int* ip1 = o(PromotesToIntValue);
double* dp1 = o(PromotesToUnsignedIntValue);
}
int* p(int);
double* p(double);
void test_p() {
int* ip = p((short)1);
double* dp = p(1.0f);
}
struct Bits {
signed short int_bitfield : 5;
unsigned int uint_bitfield : 8;
};
int* bitfields(int, int);
float* bitfields(unsigned int, int);
void test_bitfield(Bits bits, int x) {
int* ip = bitfields(bits.int_bitfield, 0);
float* fp = bitfields(bits.uint_bitfield, 0u);
}
int* multiparm(long, int, long); // expected-note {{ candidate function }}
float* multiparm(int, int, int); // expected-note {{ candidate function }}
double* multiparm(int, int, short); // expected-note {{ candidate function }}
void test_multiparm(long lv, short sv, int iv) {
int* ip1 = multiparm(lv, iv, lv);
int* ip2 = multiparm(lv, sv, lv);
float* fp1 = multiparm(iv, iv, iv);
float* fp2 = multiparm(sv, iv, iv);
double* dp1 = multiparm(sv, sv, sv);
double* dp2 = multiparm(iv, sv, sv);
multiparm(sv, sv, lv); // expected-error {{ call to 'multiparm' is ambiguous; candidates are: }}
}
// Test overloading based on qualification vs. no qualification
// conversion.
int* quals1(int const * p);
char* quals1(int * p);
int* quals2(int const * const * pp);
char* quals2(int * * pp);
int* quals3(int const * * const * ppp);
char* quals3(int *** ppp);
void test_quals(int * p, int * * pp, int * * * ppp) {
char* q1 = quals1(p);
char* q2 = quals2(pp);
char* q3 = quals3(ppp);
}
// Test overloading based on qualification ranking (C++ 13.3.2)p3.
int* quals_rank1(int const * p);
float* quals_rank1(int const volatile *p);
char* quals_rank1(char*);
double* quals_rank1(const char*);
int* quals_rank2(int const * const * pp);
float* quals_rank2(int * const * pp);
void quals_rank3(int const * const * const volatile * p); // expected-note{{candidate function}}
void quals_rank3(int const * const volatile * const * p); // expected-note{{candidate function}}
void quals_rank3(int const *); // expected-note{{candidate function}}
void quals_rank3(int volatile *); // expected-note{{candidate function}}
void test_quals_ranking(int * p, int volatile *pq, int * * pp, int * * * ppp) {
int* q1 = quals_rank1(p);
float* q2 = quals_rank1(pq);
double* q3 = quals_rank1("string literal");
char a[17];
const char* ap = a;
char* q4 = quals_rank1(a);
double* q5 = quals_rank1(ap);
float* q6 = quals_rank2(pp);
quals_rank3(ppp); // expected-error {{call to 'quals_rank3' is ambiguous; candidates are:}}
quals_rank3(p); // expected-error {{call to 'quals_rank3' is ambiguous; candidates are:}}
quals_rank3(pq);
}
// Test overloading based on derived-to-base conversions
class A { };
class B : public A { };
class C : public B { };
class D : public C { };
int* derived1(A*);
char* derived1(const A*);
float* derived1(void*);
int* derived2(A*);
float* derived2(B*);
int* derived3(A*);
float* derived3(const B*);
char* derived3(C*);
void test_derived(B* b, B const* bc, C* c, const C* cc, void* v, D* d) {
int* d1 = derived1(b);
char* d2 = derived1(bc);
int* d3 = derived1(c);
char* d4 = derived1(cc);
float* d5 = derived1(v);
float* d6 = derived2(b);
float* d7 = derived2(c);
char* d8 = derived3(d);
}
// Test overloading of references.
// (FIXME: tests binding to determine candidate sets, not overload
// resolution per se).
int* intref(int&);
float* intref(const int&);
void intref_test() {
float* ir1 = intref(5);
float* ir2 = intref(5.5);
}