1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2// REQUIRES: LP64
3
4// ------------ not interpreted as C-style cast ------------
5
6struct SimpleValueInit {
7  int i;
8};
9
10struct InitViaConstructor {
11  InitViaConstructor(int i = 7);
12};
13
14struct NoValueInit { // expected-note 2 {{candidate constructor (the implicit copy constructor)}} expected-note 2 {{candidate constructor (the implicit move constructor)}}
15  NoValueInit(int i, int j); // expected-note 2 {{candidate constructor}}
16};
17
18void test_cxx_functional_value_init() {
19  (void)SimpleValueInit();
20  (void)InitViaConstructor();
21  (void)NoValueInit(); // expected-error{{no matching constructor for initialization}}
22}
23
24void test_cxx_function_cast_multi() {
25  (void)NoValueInit(0, 0);
26  (void)NoValueInit(0, 0, 0); // expected-error{{no matching constructor for initialization}}
27  (void)int(1, 2); // expected-error{{excess elements in scalar initializer}}
28  (void)int({}, 2);           // expected-error{{excess elements in scalar initializer}}
29}
30
31
32// ------------------ everything else --------------------
33
34struct A {};
35
36// ----------- const_cast --------------
37
38typedef char c;
39typedef c *cp;
40typedef cp *cpp;
41typedef cpp *cppp;
42typedef cppp &cpppr;
43typedef const cppp &cpppcr;
44typedef const char cc;
45typedef cc *ccp;
46typedef volatile ccp ccvp;
47typedef ccvp *ccvpp;
48typedef const volatile ccvpp ccvpcvp;
49typedef ccvpcvp *ccvpcvpp;
50typedef int iar[100];
51typedef iar &iarr;
52typedef int (*f)(int);
53
54void t_cc()
55{
56  ccvpcvpp var = 0;
57  // Cast away deep consts and volatiles.
58  char ***var2 = cppp(var);
59  char ***const &var3 = var2;
60  // Const reference to reference.
61  char ***&var4 = cpppr(var3);
62  // Drop reference. Intentionally without qualifier change.
63  char *** var5 = cppp(var4);
64  const int ar[100] = {0};
65  // Array decay. Intentionally without qualifier change.
66  typedef int *intp;
67  int *pi = intp(ar);
68  f fp = 0;
69  // Don't misidentify fn** as a function pointer.
70  typedef f *fp_t;
71  f *fpp = fp_t(&fp);
72  int const A::* const A::*icapcap = 0;
73  typedef int A::* A::*iapap_t;
74  iapap_t iapap = iapap_t(icapcap);
75}
76
77// ----------- static_cast -------------
78
79struct B : public A {};             // Single public base.
80struct C1 : public virtual B {};    // Single virtual base.
81struct C2 : public virtual B {};
82struct D : public C1, public C2 {}; // Diamond
83struct E : private A {};            // Single private base.
84struct F : public C1 {};            // Single path to B with virtual.
85struct G1 : public B {};
86struct G2 : public B {};
87struct H : public G1, public G2 {}; // Ambiguous path to B.
88
89enum Enum { En1, En2 };
90enum Onom { On1, On2 };
91
92struct Co1 { operator int(); };
93struct Co2 { Co2(int); };
94struct Co3 { };
95struct Co4 { Co4(Co3); operator Co3(); };
96
97// Explicit implicits
98void t_529_2()
99{
100  int i = 1;
101  (void)float(i);
102  double d = 1.0;
103  (void)float(d);
104  (void)int(d);
105  (void)char(i);
106  typedef unsigned long ulong;
107  (void)ulong(i);
108  (void)int(En1);
109  (void)double(En1);
110  typedef int &intr;
111  (void)intr(i);
112  typedef const int &cintr;
113  (void)cintr(i);
114
115  int ar[1];
116  typedef const int *cintp;
117  (void)cintp(ar);
118  typedef void (*pfvv)();
119  (void)pfvv(t_529_2);
120
121  typedef void *voidp;
122  (void)voidp(0);
123  (void)voidp((int*)0);
124  typedef volatile const void *vcvoidp;
125  (void)vcvoidp((const int*)0);
126  typedef A *Ap;
127  (void)Ap((B*)0);
128  typedef A &Ar;
129  (void)Ar(*((B*)0));
130  typedef const B *cBp;
131  (void)cBp((C1*)0);
132  typedef B &Br;
133  (void)Br(*((C1*)0));
134  (void)Ap((D*)0);
135  typedef const A &cAr;
136  (void)cAr(*((D*)0));
137  typedef int B::*Bmp;
138  (void)Bmp((int A::*)0);
139  typedef void (B::*Bmfp)();
140  (void)Bmfp((void (A::*)())0);
141  (void)Ap((E*)0); // functional-style cast ignores access control
142  (void)voidp((const int*)0); // const_cast appended
143
144  (void)int(Co1());
145  (void)Co2(1);
146  (void)Co3((Co4)(Co3()));
147
148  // Bad code below
149  //(void)(A*)((H*)0); // {{static_cast from 'struct H *' to 'struct A *' is not allowed}}
150}
151
152// Anything to void
153void t_529_4()
154{
155  void(1);
156  (void(t_529_4));
157}
158
159// Static downcasts
160void t_529_5_8()
161{
162  typedef B *Bp;
163  (void)Bp((A*)0);
164  typedef B &Br;
165  (void)Br(*((A*)0));
166  typedef const G1 *cG1p;
167  (void)cG1p((A*)0);
168  typedef const G1 &cG1r;
169  (void)cG1r(*((A*)0));
170  (void)Bp((const A*)0); // const_cast appended
171  (void)Br(*((const A*)0)); // const_cast appended
172  typedef E *Ep;
173  (void)Ep((A*)0); // access control ignored
174  typedef E &Er;
175  (void)Er(*((A*)0)); // access control ignored
176
177  // Bad code below
178
179  typedef C1 *C1p;
180  (void)C1p((A*)0); // expected-error {{cannot cast 'A *' to 'C1p' (aka 'C1 *') via virtual base 'B'}}
181  typedef C1 &C1r;
182  (void)C1r(*((A*)0)); // expected-error {{cannot cast 'A' to 'C1r' (aka 'C1 &') via virtual base 'B'}}
183  typedef D *Dp;
184  (void)Dp((A*)0); // expected-error {{cannot cast 'A *' to 'Dp' (aka 'D *') via virtual base 'B'}}
185  typedef D &Dr;
186  (void)Dr(*((A*)0)); // expected-error {{cannot cast 'A' to 'Dr' (aka 'D &') via virtual base 'B'}}
187  typedef H *Hp;
188  (void)Hp((A*)0); // expected-error {{ambiguous cast from base 'A' to derived 'H':\n    struct A -> struct B -> struct G1 -> struct H\n    struct A -> struct B -> struct G2 -> struct H}}
189  typedef H &Hr;
190  (void)Hr(*((A*)0)); // expected-error {{ambiguous cast from base 'A' to derived 'H':\n    struct A -> struct B -> struct G1 -> struct H\n    struct A -> struct B -> struct G2 -> struct H}}
191
192  // TODO: Test DR427. This requires user-defined conversions, though.
193}
194
195// Enum conversions
196void t_529_7()
197{
198  (void)Enum(1);
199  (void)Enum(1.0);
200  (void)Onom(En1);
201
202  // Bad code below
203
204  (void)Enum((int*)0); // expected-error {{functional-style cast from 'int *' to 'Enum' is not allowed}}
205}
206
207// Void pointer to object pointer
208void t_529_10()
209{
210  typedef int *intp;
211  (void)intp((void*)0);
212  typedef const A *cAp;
213  (void)cAp((void*)0);
214  (void)intp((const void*)0); // const_cast appended
215}
216
217// Member pointer upcast.
218void t_529_9()
219{
220  typedef int A::*Amp;
221  (void)Amp((int B::*)0);
222
223  // Bad code below
224  (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':}}
225  (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}}
226}
227
228// -------- reinterpret_cast -----------
229
230enum test { testval = 1 };
231struct structure { int m; };
232typedef void (*fnptr)();
233
234// Test conversion between pointer and integral types, as in p3 and p4.
235void integral_conversion()
236{
237  typedef void *voidp;
238  void *vp = voidp(testval);
239  long l = long(vp);
240  typedef float *floatp;
241  (void)floatp(l);
242  fnptr fnp = fnptr(l);
243  (void)char(fnp); // expected-error {{cast from pointer to smaller type 'char' loses information}}
244  (void)long(fnp);
245}
246
247void pointer_conversion()
248{
249  int *p1 = 0;
250  typedef float *floatp;
251  float *p2 = floatp(p1);
252  typedef structure *structurep;
253  structure *p3 = structurep(p2);
254  typedef int **ppint;
255  typedef ppint *pppint;
256  ppint *deep = pppint(p3);
257  typedef fnptr fnptrp;
258  (void)fnptrp(deep);
259}
260
261void constness()
262{
263  int ***const ipppc = 0;
264  typedef int const *icp_t;
265  int const *icp = icp_t(ipppc);
266  typedef int *intp;
267  (void)intp(icp); // const_cast appended
268  typedef int const *const ** intcpcpp;
269  intcpcpp icpcpp = intcpcpp(ipppc); // const_cast appended
270  int *ip = intp(icpcpp);
271  (void)icp_t(ip);
272  typedef int const *const *const *intcpcpcp;
273  (void)intcpcpcp(ipppc);
274}
275
276void fnptrs()
277{
278  typedef int (*fnptr2)(int);
279  fnptr fp = 0;
280  (void)fnptr2(fp);
281  typedef void *voidp;
282  void *vp = voidp(fp);
283  (void)fnptr(vp);
284}
285
286void refs()
287{
288  long l = 0;
289  typedef char &charr;
290  char &c = charr(l);
291  // Bad: from rvalue
292  typedef int &intr;
293  (void)intr(&c); // expected-error {{functional-style cast from rvalue to reference type 'intr' (aka 'int &')}}
294}
295
296void memptrs()
297{
298  const int structure::*psi = 0;
299  typedef const float structure::*structurecfmp;
300  (void)structurecfmp(psi);
301  typedef int structure::*structureimp;
302  (void)structureimp(psi); // const_cast appended
303
304  void (structure::*psf)() = 0;
305  typedef int (structure::*structureimfp)();
306  (void)structureimfp(psf);
307
308  typedef void (structure::*structurevmfp)();
309  (void)structurevmfp(psi); // expected-error-re {{functional-style cast from 'const int structure::*' to 'structurevmfp' (aka 'void (structure::*)(){{( __attribute__\(\(thiscall\)\))?}}') is not allowed}}
310  (void)structureimp(psf); // expected-error-re {{functional-style cast from 'void (structure::*)(){{( __attribute__\(\(thiscall\)\))?}}' to 'structureimp' (aka 'int structure::*') is not allowed}}
311}
312
313// ---------------- misc ------------------
314
315void crash_on_invalid_1()
316{
317  typedef itn Typo; // expected-error {{unknown type name 'itn'}}
318  (void)Typo(1); // used to crash
319
320  typedef int &int_ref;
321  (void)int_ref(); // expected-error {{reference to type 'int' requires an initializer}}
322}
323