// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// REQUIRES: LP64
// ------------ not interpreted as C-style cast ------------
struct SimpleValueInit {
int i;
};
struct InitViaConstructor {
InitViaConstructor(int i = 7);
};
struct NoValueInit { // expected-note 2 {{candidate constructor (the implicit copy constructor)}} expected-note 2 {{candidate constructor (the implicit move constructor)}}
NoValueInit(int i, int j); // expected-note 2 {{candidate constructor}}
};
void test_cxx_functional_value_init() {
(void)SimpleValueInit();
(void)InitViaConstructor();
(void)NoValueInit(); // expected-error{{no matching constructor for initialization}}
}
void test_cxx_function_cast_multi() {
(void)NoValueInit(0, 0);
(void)NoValueInit(0, 0, 0); // expected-error{{no matching constructor for initialization}}
(void)int(1, 2); // expected-error{{excess elements in scalar initializer}}
(void)int({}, 2); // expected-error{{excess elements in scalar initializer}}
}
// ------------------ everything else --------------------
struct A {};
// ----------- const_cast --------------
typedef char c;
typedef c *cp;
typedef cp *cpp;
typedef cpp *cppp;
typedef cppp &cpppr;
typedef const cppp &cpppcr;
typedef const char cc;
typedef cc *ccp;
typedef volatile ccp ccvp;
typedef ccvp *ccvpp;
typedef const volatile ccvpp ccvpcvp;
typedef ccvpcvp *ccvpcvpp;
typedef int iar[100];
typedef iar &iarr;
typedef int (*f)(int);
void t_cc()
{
ccvpcvpp var = 0;
// Cast away deep consts and volatiles.
char ***var2 = cppp(var);
char ***const &var3 = var2;
// Const reference to reference.
char ***&var4 = cpppr(var3);
// Drop reference. Intentionally without qualifier change.
char *** var5 = cppp(var4);
const int ar[100] = {0};
// Array decay. Intentionally without qualifier change.
typedef int *intp;
int *pi = intp(ar);
f fp = 0;
// Don't misidentify fn** as a function pointer.
typedef f *fp_t;
f *fpp = fp_t(&fp);
int const A::* const A::*icapcap = 0;
typedef int A::* A::*iapap_t;
iapap_t iapap = iapap_t(icapcap);
}
// ----------- static_cast -------------
struct B : public A {}; // Single public base.
struct C1 : public virtual B {}; // Single virtual base.
struct C2 : public virtual B {};
struct D : public C1, public C2 {}; // Diamond
struct E : private A {}; // Single private base.
struct F : public C1 {}; // Single path to B with virtual.
struct G1 : public B {};
struct G2 : public B {};
struct H : public G1, public G2 {}; // Ambiguous path to B.
enum Enum { En1, En2 };
enum Onom { On1, On2 };
struct Co1 { operator int(); };
struct Co2 { Co2(int); };
struct Co3 { };
struct Co4 { Co4(Co3); operator Co3(); };
// Explicit implicits
void t_529_2()
{
int i = 1;
(void)float(i);
double d = 1.0;
(void)float(d);
(void)int(d);
(void)char(i);
typedef unsigned long ulong;
(void)ulong(i);
(void)int(En1);
(void)double(En1);
typedef int &intr;
(void)intr(i);
typedef const int &cintr;
(void)cintr(i);
int ar[1];
typedef const int *cintp;
(void)cintp(ar);
typedef void (*pfvv)();
(void)pfvv(t_529_2);
typedef void *voidp;
(void)voidp(0);
(void)voidp((int*)0);
typedef volatile const void *vcvoidp;
(void)vcvoidp((const int*)0);
typedef A *Ap;
(void)Ap((B*)0);
typedef A &Ar;
(void)Ar(*((B*)0)); // expected-warning {{binding dereferenced null pointer to reference has undefined behavior}}
typedef const B *cBp;
(void)cBp((C1*)0);
typedef B &Br;
(void)Br(*((C1*)0)); // expected-warning {{binding dereferenced null pointer to reference has undefined behavior}}
(void)Ap((D*)0);
typedef const A &cAr;
(void)cAr(*((D*)0)); // expected-warning {{binding dereferenced null pointer to reference has undefined behavior}}
typedef int B::*Bmp;
(void)Bmp((int A::*)0);
typedef void (B::*Bmfp)();
(void)Bmfp((void (A::*)())0);
(void)Ap((E*)0); // functional-style cast ignores access control
(void)voidp((const int*)0); // const_cast appended
(void)int(Co1());
(void)Co2(1);
(void)Co3((Co4)(Co3()));
// Bad code below
//(void)(A*)((H*)0); // {{static_cast from 'struct H *' to 'struct A *' is not allowed}}
}
// Anything to void
void t_529_4()
{
void(1);
(void(t_529_4));
}
// Static downcasts
void t_529_5_8()
{
typedef B *Bp;
(void)Bp((A*)0);
typedef B &Br;
(void)Br(*((A*)0));
typedef const G1 *cG1p;
(void)cG1p((A*)0);
typedef const G1 &cG1r;
(void)cG1r(*((A*)0));
(void)Bp((const A*)0); // const_cast appended
(void)Br(*((const A*)0)); // const_cast appended
typedef E *Ep;
(void)Ep((A*)0); // access control ignored
typedef E &Er;
(void)Er(*((A*)0)); // access control ignored
// Bad code below
typedef C1 *C1p;
(void)C1p((A*)0); // expected-error {{cannot cast 'A *' to 'C1p' (aka 'C1 *') via virtual base 'B'}}
typedef C1 &C1r;
(void)C1r(*((A*)0)); // expected-error {{cannot cast 'A' to 'C1r' (aka 'C1 &') via virtual base 'B'}}
typedef D *Dp;
(void)Dp((A*)0); // expected-error {{cannot cast 'A *' to 'Dp' (aka 'D *') via virtual base 'B'}}
typedef D &Dr;
(void)Dr(*((A*)0)); // expected-error {{cannot cast 'A' to 'Dr' (aka 'D &') via virtual base 'B'}}
typedef H *Hp;
(void)Hp((A*)0); // expected-error {{ambiguous cast from base 'A' to derived 'H':\n A -> B -> G1 -> struct H\n A -> B -> G2 -> struct H}}
typedef H &Hr;
(void)Hr(*((A*)0)); // expected-error {{ambiguous cast from base 'A' to derived 'H':\n A -> B -> G1 -> struct H\n A -> B -> G2 -> struct H}}
// TODO: Test DR427. This requires user-defined conversions, though.
}
// Enum conversions
void t_529_7()
{
(void)Enum(1);
(void)Enum(1.0);
(void)Onom(En1);
// Bad code below
(void)Enum((int*)0); // expected-error {{functional-style cast from 'int *' to 'Enum' is not allowed}}
}
// Void pointer to object pointer
void t_529_10()
{
typedef int *intp;
(void)intp((void*)0);
typedef const A *cAp;
(void)cAp((void*)0);
(void)intp((const void*)0); // const_cast appended
}
// Member pointer upcast.
void t_529_9()
{
typedef int A::*Amp;
(void)Amp((int B::*)0);
// Bad code below
(void)Amp((int H::*)0); // expected-error {{ambiguous conversion from pointer to member of derived class 'H' to pointer to member of base class 'A':}}
(void)Amp((int F::*)0); // expected-error {{conversion from pointer to member of class 'F' to pointer to member of class 'A' via virtual base 'B' is not allowed}}
}
// -------- reinterpret_cast -----------
enum test { testval = 1 };
struct structure { int m; };
typedef void (*fnptr)();
// Test conversion between pointer and integral types, as in p3 and p4.
void integral_conversion()
{
typedef void *voidp;
void *vp = voidp(testval);
long l = long(vp);
typedef float *floatp;
(void)floatp(l);
fnptr fnp = fnptr(l);
(void)char(fnp); // expected-error {{cast from pointer to smaller type 'char' loses information}}
(void)long(fnp);
}
void pointer_conversion()
{
int *p1 = 0;
typedef float *floatp;
float *p2 = floatp(p1);
typedef structure *structurep;
structure *p3 = structurep(p2);
typedef int **ppint;
typedef ppint *pppint;
ppint *deep = pppint(p3);
typedef fnptr fnptrp;
(void)fnptrp(deep);
}
void constness()
{
int ***const ipppc = 0;
typedef int const *icp_t;
int const *icp = icp_t(ipppc);
typedef int *intp;
(void)intp(icp); // const_cast appended
typedef int const *const ** intcpcpp;
intcpcpp icpcpp = intcpcpp(ipppc); // const_cast appended
int *ip = intp(icpcpp);
(void)icp_t(ip);
typedef int const *const *const *intcpcpcp;
(void)intcpcpcp(ipppc);
}
void fnptrs()
{
typedef int (*fnptr2)(int);
fnptr fp = 0;
(void)fnptr2(fp);
typedef void *voidp;
void *vp = voidp(fp);
(void)fnptr(vp);
}
void refs()
{
long l = 0;
typedef char &charr;
char &c = charr(l);
// Bad: from rvalue
typedef int &intr;
(void)intr(&c); // expected-error {{functional-style cast from rvalue to reference type 'intr' (aka 'int &')}}
}
void memptrs()
{
const int structure::*psi = 0;
typedef const float structure::*structurecfmp;
(void)structurecfmp(psi);
typedef int structure::*structureimp;
(void)structureimp(psi); // const_cast appended
void (structure::*psf)() = 0;
typedef int (structure::*structureimfp)();
(void)structureimfp(psf);
typedef void (structure::*structurevmfp)();
(void)structurevmfp(psi); // expected-error-re {{functional-style cast from 'const int structure::*' to 'structurevmfp' (aka 'void (structure::*)(){{( __attribute__\(\(thiscall\)\))?}}') is not allowed}}
(void)structureimp(psf); // expected-error-re {{functional-style cast from 'void (structure::*)(){{( __attribute__\(\(thiscall\)\))?}}' to 'structureimp' (aka 'int structure::*') is not allowed}}
}
// ---------------- misc ------------------
void crash_on_invalid_1()
{
typedef itn Typo; // expected-error {{unknown type name 'itn'}}
(void)Typo(1); // used to crash
typedef int &int_ref;
(void)int_ref(); // expected-error {{reference to type 'int' requires an initializer}}
}
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