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      1 // RUN: not %clang_cc1 -fsyntax-only %s -std=c++11 2>&1 | FileCheck %s -check-prefix=CHECK-ELIDE-NOTREE
      2 // RUN: not %clang_cc1 -fsyntax-only %s -fno-elide-type -std=c++11 2>&1 | FileCheck %s -check-prefix=CHECK-NOELIDE-NOTREE
      3 // RUN: not %clang_cc1 -fsyntax-only %s -fdiagnostics-show-template-tree -std=c++11 2>&1 | FileCheck %s -check-prefix=CHECK-ELIDE-TREE
      4 // RUN: not %clang_cc1 -fsyntax-only %s -fno-elide-type -fdiagnostics-show-template-tree -std=c++11 2>&1 | FileCheck %s -check-prefix=CHECK-NOELIDE-TREE
      5 
      6 // PR9548 - "no known conversion from 'vector<string>' to 'vector<string>'"
      7 // vector<string> refers to two different types here.  Make sure the message
      8 // gives a way to tell them apart.
      9 class versa_string;
     10 typedef versa_string string;
     11 
     12 namespace std {template <typename T> class vector;}
     13 using std::vector;
     14 
     15 void f(vector<string> v);
     16 
     17 namespace std {
     18   class basic_string;
     19   typedef basic_string string;
     20   template <typename T> class vector {};
     21   void g() {
     22     vector<string> v;
     23     f(v);
     24   }
     25 } // end namespace std
     26 // CHECK-ELIDE-NOTREE: no matching function for call to 'f'
     27 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<class std::basic_string>' to 'vector<class versa_string>' for 1st argument
     28 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f'
     29 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<class std::basic_string>' to 'vector<class versa_string>' for 1st argument
     30 // CHECK-ELIDE-TREE: no matching function for call to 'f'
     31 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     32 // CHECK-ELIDE-TREE:   vector<
     33 // CHECK-ELIDE-TREE:     [class std::basic_string != class versa_string]>
     34 // CHECK-NOELIDE-TREE: no matching function for call to 'f'
     35 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     36 // CHECK-NOELIDE-TREE:   vector<
     37 // CHECK-NOELIDE-TREE:     [class std::basic_string != class versa_string]>
     38 
     39 template <int... A>
     40 class I1{};
     41 void set1(I1<1,2,3,4,2,3,4,3>) {};
     42 void test1() {
     43   set1(I1<1,2,3,4,2,2,4,3,7>());
     44 }
     45 // CHECK-ELIDE-NOTREE: no matching function for call to 'set1'
     46 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'I1<[5 * ...], 2, [2 * ...], 7>' to 'I1<[5 * ...], 3, [2 * ...], (no argument)>' for 1st argument
     47 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set1'
     48 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'I1<1, 2, 3, 4, 2, 2, 4, 3, 7>' to 'I1<1, 2, 3, 4, 2, 3, 4, 3, (no argument)>' for 1st argument
     49 // CHECK-ELIDE-TREE: no matching function for call to 'set1'
     50 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     51 // CHECK-ELIDE-TREE:   I1<
     52 // CHECK-ELIDE-TREE:     [5 * ...],
     53 // CHECK-ELIDE-TREE:     [2 != 3],
     54 // CHECK-ELIDE-TREE:     [2 * ...],
     55 // CHECK-ELIDE-TREE:     [7 != (no argument)]>
     56 // CHECK-NOELIDE-TREE: no matching function for call to 'set1'
     57 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     58 // CHECK-NOELIDE-TREE:   I1<
     59 // CHECK-NOELIDE-TREE:     1,
     60 // CHECK-NOELIDE-TREE:     2,
     61 // CHECK-NOELIDE-TREE:     3,
     62 // CHECK-NOELIDE-TREE:     4,
     63 // CHECK-NOELIDE-TREE:     2,
     64 // CHECK-NOELIDE-TREE:     [2 != 3],
     65 // CHECK-NOELIDE-TREE:     4,
     66 // CHECK-NOELIDE-TREE:     3,
     67 // CHECK-NOELIDE-TREE:     [7 != (no argument)]>
     68 
     69 template <class A, class B, class C = void>
     70 class I2{};
     71 void set2(I2<int, int>) {};
     72 void test2() {
     73   set2(I2<double, int, int>());
     74 }
     75 // CHECK-ELIDE-NOTREE: no matching function for call to 'set2'
     76 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'I2<double, [...], int>' to 'I2<int, [...], (default) void>' for 1st argument
     77 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set2'
     78 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'I2<double, int, int>' to 'I2<int, int, (default) void>' for 1st argument
     79 // CHECK-ELIDE-TREE: no matching function for call to 'set2'
     80 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     81 // CHECK-ELIDE-TREE:   I2<
     82 // CHECK-ELIDE-TREE:     [double != int],
     83 // CHECK-ELIDE-TREE:     [...],
     84 // CHECK-ELIDE-TREE:     [int != (default) void]>
     85 // CHECK-NOELIDE-TREE: no matching function for call to 'set2'
     86 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
     87 // CHECK-NOELIDE-TREE:   I2<
     88 // CHECK-NOELIDE-TREE:     [double != int],
     89 // CHECK-NOELIDE-TREE:     int,
     90 // CHECK-NOELIDE-TREE:     [int != (default) void]>
     91 
     92 int V1, V2, V3;
     93 template <int* A, int *B>
     94 class I3{};
     95 void set3(I3<&V1, &V2>) {};
     96 void test3() {
     97   set3(I3<&V3, &V2>());
     98 }
     99 // CHECK-ELIDE-NOTREE: no matching function for call to 'set3'
    100 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'I3<&V3, [...]>' to 'I3<&V1, [...]>' for 1st argument
    101 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set3'
    102 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'I3<&V3, &V2>' to 'I3<&V1, &V2>' for 1st argument
    103 // CHECK-ELIDE-TREE: no matching function for call to 'set3'
    104 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    105 // CHECK-ELIDE-TREE:   I3<
    106 // CHECK-ELIDE-TREE:     [&V3 != &V1]
    107 // CHECK-ELIDE-TREE:     [...]>
    108 // CHECK-NOELIDE-TREE: no matching function for call to 'set3'
    109 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    110 // CHECK-NOELIDE-TREE:   I3<
    111 // CHECK-NOELIDE-TREE:     [&V3 != &V1]
    112 // CHECK-NOELIDE-TREE:     &V2>
    113 
    114 template <class A, class B>
    115 class Alpha{};
    116 template <class A, class B>
    117 class Beta{};
    118 template <class A, class B>
    119 class Gamma{};
    120 template <class A, class B>
    121 class Delta{};
    122 
    123 void set4(Alpha<int, int>);
    124 void test4() {
    125   set4(Beta<void, void>());
    126 }
    127 // CHECK-ELIDE-NOTREE: no matching function for call to 'set4'
    128 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'Beta<void, void>' to 'Alpha<int, int>' for 1st argument
    129 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set4'
    130 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'Beta<void, void>' to 'Alpha<int, int>' for 1st argument
    131 // CHECK-ELIDE-TREE: no matching function for call to 'set4'
    132 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from 'Beta<void, void>' to 'Alpha<int, int>' for 1st argument
    133 // CHECK-NOELIDE-TREE: no matching function for call to 'set4'
    134 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from 'Beta<void, void>' to 'Alpha<int, int>' for 1st argument
    135 
    136 void set5(Alpha<Beta<Gamma<Delta<int, int>, int>, int>, int>);
    137 void test5() {
    138   set5(Alpha<Beta<Gamma<void, void>, double>, double>());
    139 }
    140 // CHECK-ELIDE-NOTREE: no matching function for call to 'set5'
    141 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'Alpha<Beta<Gamma<void, void>, double>, double>' to 'Alpha<Beta<Gamma<Delta<int, int>, int>, int>, int>' for 1st argument
    142 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set5'
    143 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'Alpha<Beta<Gamma<void, void>, double>, double>' to 'Alpha<Beta<Gamma<Delta<int, int>, int>, int>, int>' for 1st argument
    144 // CHECK-ELIDE-TREE: no matching function for call to 'set5'
    145 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    146 // CHECK-ELIDE-TREE:   Alpha<
    147 // CHECK-ELIDE-TREE:     Beta<
    148 // CHECK-ELIDE-TREE:       Gamma<
    149 // CHECK-ELIDE-TREE:         [void != Delta<int, int>],
    150 // CHECK-ELIDE-TREE:         [void != int]>
    151 // CHECK-ELIDE-TREE:       [double != int]>
    152 // CHECK-ELIDE-TREE:     [double != int]>
    153 // CHECK-NOELIDE-TREE: no matching function for call to 'set5'
    154 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    155 // CHECK-NOELIDE-TREE:   Alpha<
    156 // CHECK-NOELIDE-TREE:     Beta<
    157 // CHECK-NOELIDE-TREE:       Gamma<
    158 // CHECK-NOELIDE-TREE:         [void != Delta<int, int>],
    159 // CHECK-NOELIDE-TREE:         [void != int]>
    160 // CHECK-NOELIDE-TREE:       [double != int]>
    161 // CHECK-NOELIDE-TREE:     [double != int]>
    162 
    163 void test6() {
    164   set5(Alpha<Beta<Delta<int, int>, int>, int>());
    165 }
    166 // CHECK-ELIDE-NOTREE: no matching function for call to 'set5'
    167 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'Alpha<Beta<Delta<int, int>, [...]>, [...]>' to 'Alpha<Beta<Gamma<Delta<int, int>, int>, [...]>, [...]>' for 1st argument
    168 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set5'
    169 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'Alpha<Beta<Delta<int, int>, int>, int>' to 'Alpha<Beta<Gamma<Delta<int, int>, int>, int>, int>' for 1st argument
    170 // CHECK-ELIDE-TREE: no matching function for call to 'set5'
    171 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    172 // CHECK-ELIDE-TREE:   Alpha<
    173 // CHECK-ELIDE-TREE:     Beta<
    174 // CHECK-ELIDE-TREE:       [Delta<int, int> != Gamma<Delta<int, int>, int>],
    175 // CHECK-ELIDE-TREE:       [...]>
    176 // CHECK-ELIDE-TREE:     [...]>
    177 // CHECK-NOELIDE-TREE: no matching function for call to 'set5'
    178 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    179 // CHECK-NOELIDE-TREE:   Alpha<
    180 // CHECK-NOELIDE-TREE:     Beta<
    181 // CHECK-NOELIDE-TREE:       [Delta<int, int> != Gamma<Delta<int, int>, int>],
    182 // CHECK-NOELIDE-TREE:       int>
    183 // CHECK-NOELIDE-TREE:     int>
    184 
    185 int a7, b7;
    186 int c7[] = {1,2,3};
    187 template<int *A>
    188 class class7 {};
    189 void set7(class7<&a7> A) {}
    190 void test7() {
    191   set7(class7<&a7>());
    192   set7(class7<&b7>());
    193   set7(class7<c7>());
    194   set7(class7<nullptr>());
    195 }
    196 // CHECK-ELIDE-NOTREE: no matching function for call to 'set7'
    197 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<&b7>' to 'class7<&a7>' for 1st argument
    198 // CHECK-ELIDE-NOTREE: no matching function for call to 'set7'
    199 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<c7>' to 'class7<&a7>' for 1st argument
    200 // CHECK-ELIDE-NOTREE: no matching function for call to 'set7'
    201 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<nullptr>' to 'class7<&a7>' for 1st argument
    202 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set7'
    203 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<&b7>' to 'class7<&a7>' for 1st argument
    204 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set7'
    205 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<c7>' to 'class7<&a7>' for 1st argument
    206 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set7'
    207 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class7<nullptr>' to 'class7<&a7>' for 1st argument
    208 // CHECK-ELIDE-TREE: no matching function for call to 'set7'
    209 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    210 // CHECK-ELIDE-TREE:   class7<
    211 // CHECK-ELIDE-TREE:     [&b7 != &a7]>
    212 // CHECK-ELIDE-TREE: no matching function for call to 'set7'
    213 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    214 // CHECK-ELIDE-TREE:   class7<
    215 // CHECK-ELIDE-TREE:     [c7 != &a7]>
    216 // CHECK-ELIDE-TREE: no matching function for call to 'set7'
    217 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    218 // CHECK-ELIDE-TREE:   class7<
    219 // CHECK-ELIDE-TREE:     [nullptr != &a7]>
    220 // CHECK-NOELIDE-TREE: no matching function for call to 'set7'
    221 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    222 // CHECK-NOELIDE-TREE:   class7<
    223 // CHECK-NOELIDE-TREE:     [&b7 != &a7]>
    224 // CHECK-NOELIDE-TREE: no matching function for call to 'set7'
    225 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    226 // CHECK-NOELIDE-TREE:   class7<
    227 // CHECK-NOELIDE-TREE:     [c7 != &a7]>
    228 // CHECK-NOELIDE-TREE: no matching function for call to 'set7'
    229 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    230 // CHECK-NOELIDE-TREE:   class7<
    231 // CHECK-NOELIDE-TREE:     [nullptr != &a7]>
    232 
    233 template<typename ...T> struct S8 {};
    234 template<typename T> using U8 = S8<int, char, T>;
    235 int f8(S8<int, char, double>);
    236 int k8 = f8(U8<char>());
    237 // CHECK-ELIDE-NOTREE: no matching function for call to 'f8'
    238 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'S8<[2 * ...], char>' to 'S8<[2 * ...], double>' for 1st argument
    239 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f8'
    240 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'S8<int, char, char>' to 'S8<int, char, double>' for 1st argument
    241 // CHECK-ELIDE-TREE: no matching function for call to 'f8'
    242 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    243 // CHECK-ELIDE-TREE:   S8<
    244 // CHECK-ELIDE-TREE:     [2 * ...],
    245 // CHECK-ELIDE-TREE:     [char != double]>
    246 // CHECK-NOELIDE-TREE: no matching function for call to 'f8'
    247 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    248 // CHECK-NOELIDE-TREE:   S8<
    249 // CHECK-NOELIDE-TREE:     int,
    250 // CHECK-NOELIDE-TREE:     char,
    251 // CHECK-NOELIDE-TREE:     [char != double]>
    252 
    253 template<typename ...T> struct S9 {};
    254 template<typename T> using U9 = S9<int, char, T>;
    255 template<typename T> using V9 = U9<U9<T>>;
    256 int f9(S9<int, char, U9<const double>>);
    257 int k9 = f9(V9<double>());
    258 
    259 // CHECK-ELIDE-NOTREE: no matching function for call to 'f9'
    260 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'S9<[2 * ...], S9<[2 * ...], double>>' to 'S9<[2 * ...], S9<[2 * ...], const double>>' for 1st argument
    261 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f9'
    262 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'S9<int, char, S9<int, char, double>>' to 'S9<int, char, S9<int, char, const double>>' for 1st argument
    263 // CHECK-ELIDE-TREE: no matching function for call to 'f9'
    264 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    265 // CHECK-ELIDE-TREE:   S9<
    266 // CHECK-ELIDE-TREE:     [2 * ...],
    267 // CHECK-ELIDE-TREE:     S9<
    268 // CHECK-ELIDE-TREE:       [2 * ...],
    269 // CHECK-ELIDE-TREE:       [double != const double]>>
    270 // CHECK-NOELIDE-TREE: no matching function for call to 'f9'
    271 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    272 // CHECK-NOELIDE-TREE:   S9<
    273 // CHECK-NOELIDE-TREE:     int,
    274 // CHECK-NOELIDE-TREE:     char,
    275 // CHECK-NOELIDE-TREE:     S9<
    276 // CHECK-NOELIDE-TREE:       int,
    277 // CHECK-NOELIDE-TREE:       char,
    278 // CHECK-NOELIDE-TREE:       [double != const double]>>
    279 
    280 template<typename ...A> class class_types {};
    281 void set10(class_types<int, int>) {}
    282 void test10() {
    283   set10(class_types<int>());
    284   set10(class_types<int, int, int>());
    285 }
    286 
    287 // CHECK-ELIDE-NOTREE: no matching function for call to 'set10'
    288 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_types<[...], (no argument)>' to 'class_types<[...], int>' for 1st argument
    289 // CHECK-ELIDE-NOTREE: no matching function for call to 'set10'
    290 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_types<[2 * ...], int>' to 'class_types<[2 * ...], (no argument)>' for 1st argument
    291 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set10'
    292 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_types<int, (no argument)>' to 'class_types<int, int>' for 1st argument
    293 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set10'
    294 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_types<int, int, int>' to 'class_types<int, int, (no argument)>' for 1st argument
    295 // CHECK-ELIDE-TREE: no matching function for call to 'set10'
    296 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    297 // CHECK-ELIDE-TREE:   class_types<
    298 // CHECK-ELIDE-TREE:     [...],
    299 // CHECK-ELIDE-TREE:     [(no argument) != int]>
    300 // CHECK-ELIDE-TREE: no matching function for call to 'set10'
    301 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    302 // CHECK-ELIDE-TREE:   class_types<
    303 // CHECK-ELIDE-TREE:     [2 * ...],
    304 // CHECK-ELIDE-TREE:     [int != (no argument)]>
    305 // CHECK-NOELIDE-TREE: no matching function for call to 'set10'
    306 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    307 // CHECK-NOELIDE-TREE:   class_types<
    308 // CHECK-NOELIDE-TREE:     int,
    309 // CHECK-NOELIDE-TREE:     [(no argument) != int]>
    310 // CHECK-NOELIDE-TREE: no matching function for call to 'set10'
    311 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    312 // CHECK-NOELIDE-TREE:   class_types<
    313 // CHECK-NOELIDE-TREE:     int,
    314 // CHECK-NOELIDE-TREE:     int,
    315 // CHECK-NOELIDE-TREE:     [int != (no argument)]>
    316 
    317 template<int ...A> class class_ints {};
    318 void set11(class_ints<2, 3>) {}
    319 void test11() {
    320   set11(class_ints<1>());
    321   set11(class_ints<0, 3, 6>());
    322 }
    323 // CHECK-ELIDE-NOTREE: no matching function for call to 'set11'
    324 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ints<1, (no argument)>' to 'class_ints<2, 3>' for 1st argument
    325 // CHECK-ELIDE-NOTREE: no matching function for call to 'set11'
    326 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ints<0, [...], 6>' to 'class_ints<2, [...], (no argument)>' for 1st argument
    327 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set11'
    328 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ints<1, (no argument)>' to 'class_ints<2, 3>' for 1st argument
    329 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set11'
    330 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ints<0, 3, 6>' to 'class_ints<2, 3, (no argument)>' for 1st argument
    331 // CHECK-ELIDE-TREE: no matching function for call to 'set11'
    332 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    333 // CHECK-ELIDE-TREE:   class_ints<
    334 // CHECK-ELIDE-TREE:     [1 != 2],
    335 // CHECK-ELIDE-TREE:     [(no argument) != 3]>
    336 // CHECK-ELIDE-TREE: no matching function for call to 'set11'
    337 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    338 // CHECK-ELIDE-TREE:   class_ints<
    339 // CHECK-ELIDE-TREE:     [0 != 2],
    340 // CHECK-ELIDE-TREE:     [...],
    341 // CHECK-ELIDE-TREE:     [6 != (no argument)]>
    342 // CHECK-NOELIDE-TREE: no matching function for call to 'set11'
    343 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    344 // CHECK-NOELIDE-TREE:   class_ints<
    345 // CHECK-NOELIDE-TREE:     [1 != 2],
    346 // CHECK-NOELIDE-TREE:     [(no argument) != 3]>
    347 // CHECK-NOELIDE-TREE: no matching function for call to 'set11'
    348 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    349 // CHECK-NOELIDE-TREE:   class_ints<
    350 // CHECK-NOELIDE-TREE:     [0 != 2],
    351 // CHECK-NOELIDE-TREE:     3,
    352 // CHECK-NOELIDE-TREE:     [6 != (no argument)]>
    353 
    354 template<template<class> class ...A> class class_template_templates {};
    355 template<class> class tt1 {};
    356 template<class> class tt2 {};
    357 void set12(class_template_templates<tt1, tt1>) {}
    358 void test12() {
    359   set12(class_template_templates<tt2>());
    360   set12(class_template_templates<tt1, tt1, tt1>());
    361 }
    362 // CHECK-ELIDE-NOTREE: no matching function for call to 'set12'
    363 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_template_templates<template tt2, template (no argument)>' to 'class_template_templates<template tt1, template tt1>' for 1st argument
    364 // CHECK-ELIDE-NOTREE: no matching function for call to 'set12'
    365 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_template_templates<[2 * ...], template tt1>' to 'class_template_templates<[2 * ...], template (no argument)>' for 1st argument
    366 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set12'
    367 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_template_templates<template tt2, template (no argument)>' to 'class_template_templates<template tt1, template tt1>' for 1st argument
    368 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set12'
    369 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_template_templates<template tt1, template tt1, template tt1>' to 'class_template_templates<template tt1, template tt1, template (no argument)>' for 1st argument
    370 // CHECK-ELIDE-TREE: no matching function for call to 'set12'
    371 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    372 // CHECK-ELIDE-TREE:   class_template_templates<
    373 // CHECK-ELIDE-TREE:     [template tt2 != template tt1],
    374 // CHECK-ELIDE-TREE:     [template (no argument) != template tt1]>
    375 // CHECK-ELIDE-TREE: no matching function for call to 'set12'
    376 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    377 // CHECK-ELIDE-TREE:   class_template_templates<
    378 // CHECK-ELIDE-TREE:     [2 * ...],
    379 // CHECK-ELIDE-TREE:     [template tt1 != template (no argument)]>
    380 // CHECK-NOELIDE-TREE: no matching function for call to 'set12'
    381 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    382 // CHECK-NOELIDE-TREE:   class_template_templates<
    383 // CHECK-NOELIDE-TREE:     [template tt2 != template tt1],
    384 // CHECK-NOELIDE-TREE:     [template (no argument) != template tt1]>
    385 // CHECK-NOELIDE-TREE: no matching function for call to 'set12'
    386 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    387 // CHECK-NOELIDE-TREE:   class_template_templates<
    388 // CHECK-NOELIDE-TREE:     template tt1,
    389 // CHECK-NOELIDE-TREE:     template tt1,
    390 // CHECK-NOELIDE-TREE:     [template tt1 != template (no argument)]>
    391 
    392 double a13, b13, c13, d13;
    393 template<double* ...A> class class_ptrs {};
    394 void set13(class_ptrs<&a13, &b13>) {}
    395 void test13() {
    396   set13(class_ptrs<&c13>());
    397   set13(class_ptrss<&a13, &b13, &d13>());
    398 }
    399 // CHECK-ELIDE-NOTREE: no matching function for call to 'set13'
    400 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ptrs<&c13, (no argument)>' to 'class_ptrs<&a13, &b13>' for 1st argument
    401 // CHECK-ELIDE-NOTREE: no matching function for call to 'set13'
    402 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ptrs<[2 * ...], &d13>' to 'class_ptrs<[2 * ...], (no argument)>' for 1st argument
    403 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set13'
    404 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ptrs<&c13, (no argument)>' to 'class_ptrs<&a13, &b13>' for 1st argument
    405 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set13'
    406 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'class_ptrs<&a13, &b13, &d13>' to 'class_ptrs<&a13, &b13, (no argument)>' for 1st argument
    407 // CHECK-ELIDE-TREE: no matching function for call to 'set13'
    408 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    409 // CHECK-ELIDE-TREE:   class_ptrs<
    410 // CHECK-ELIDE-TREE:     [&c13 != &a13],
    411 // CHECK-ELIDE-TREE:     [(no argument) != &b13]>
    412 // CHECK-ELIDE-TREE: no matching function for call to 'set13'
    413 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    414 // CHECK-ELIDE-TREE:   class_ptrs<
    415 // CHECK-ELIDE-TREE:     [2 * ...],
    416 // CHECK-ELIDE-TREE:     [&d13 != (no argument)]>
    417 // CHECK-NOELIDE-TREE: no matching function for call to 'set13'
    418 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    419 // CHECK-NOELIDE-TREE:   class_ptrs<
    420 // CHECK-NOELIDE-TREE:     [&c13 != &a13],
    421 // CHECK-NOELIDE-TREE:     [(no argument) != &b13]>
    422 // CHECK-NOELIDE-TREE: no matching function for call to 'set13'
    423 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    424 // CHECK-NOELIDE-TREE:   class_ptrs<
    425 // CHECK-NOELIDE-TREE:     &a13,
    426 // CHECK-NOELIDE-TREE:     &b13,
    427 // CHECK-NOELIDE-TREE:     [&d13 != (no argument)]>
    428 
    429 template<typename T> struct s14 {};
    430 template<typename T> using a14 = s14<T>;
    431 typedef a14<int> b14;
    432 template<typename T> using c14 = b14;
    433 int f14(c14<int>);
    434 int k14 = f14(a14<char>());
    435 // CHECK-ELIDE-NOTREE: no matching function for call to 'f14'
    436 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'a14<char>' to 'a14<int>' for 1st argument
    437 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f14'
    438 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'a14<char>' to 'a14<int>' for 1st argument
    439 // CHECK-ELIDE-TREE: no matching function for call to 'f14'
    440 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    441 // CHECK-ELIDE-TREE:   a14<
    442 // CHECK-ELIDE-TREE:     [char != int]>
    443 // CHECK-NOELIDE-TREE: no matching function for call to 'f14'
    444 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    445 // CHECK-NOELIDE-TREE:   a14<
    446 // CHECK-NOELIDE-TREE:     [char != int]>
    447 
    448 void set15(vector<vector<int>>) {}
    449 void test15() {
    450   set15(vector<vector<int>>());
    451 }
    452 // CHECK-ELIDE-NOTREE-NOT: set15
    453 // CHECK-NOELIDE-NOTREE-NOT: set15
    454 // CHECK-ELIDE-TREE-NOT: set15
    455 // CHECK-NOELIDE-TREE-NOT: set15
    456 // no error here
    457 
    458 void set16(vector<const vector<int>>) {}
    459 void test16() {
    460   set16(vector<const vector<const int>>());
    461 }
    462 // CHECK-ELIDE-NOTREE: no matching function for call to 'set16'
    463 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<const int>>' to 'vector<const vector<int>>' for 1st argument
    464 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set16'
    465 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<const int>>' to 'vector<const vector<int>>' for 1st argument
    466 // CHECK-ELIDE-TREE: no matching function for call to 'set16'
    467 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    468 // CHECK-ELIDE-TREE:   vector<
    469 // CHECK-ELIDE-TREE:     const vector<
    470 // CHECK-ELIDE-TREE:       [const != (no qualifiers)] int>>
    471 // CHECK-NOELIDE-TREE: no matching function for call to 'set16'
    472 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    473 // CHECK-NOELIDE-TREE:   vector<
    474 // CHECK-NOELIDE-TREE:     const vector<
    475 // CHECK-NOELIDE-TREE:       [const != (no qualifiers)] int>>
    476 
    477 void set17(vector<vector<int>>) {}
    478 void test17() {
    479   set17(vector<const vector<int>>());
    480 }
    481 // CHECK-ELIDE-NOTREE: no matching function for call to 'set17'
    482 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<[...]>>' to 'vector<vector<[...]>>' for 1st argument
    483 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set17'
    484 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<int>>' to 'vector<vector<int>>' for 1st argument
    485 // CHECK-ELIDE-TREE: no matching function for call to 'set17'
    486 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    487 // CHECK-ELIDE-TREE:   vector<
    488 // CHECK-ELIDE-TREE:     [const != (no qualifiers)] vector<
    489 // CHECK-ELIDE-TREE:       [...]>>
    490 // CHECK-NOELIDE-TREE: no matching function for call to 'set17'
    491 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    492 // CHECK-NOELIDE-TREE:   vector<
    493 // CHECK-NOELIDE-TREE:     [const != (no qualifiers)] vector<
    494 // CHECK-NOELIDE-TREE:       int>>
    495 
    496 void set18(vector<const vector<int>>) {}
    497 void test18() {
    498   set18(vector<vector<int>>());
    499 }
    500 // CHECK-ELIDE-NOTREE: no matching function for call to 'set18'
    501 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<vector<[...]>>' to 'vector<const vector<[...]>>' for 1st argument
    502 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set18'
    503 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<vector<int>>' to 'vector<const vector<int>>' for 1st argument
    504 // CHECK-ELIDE-TREE: no matching function for call to 'set18'
    505 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    506 // CHECK-ELIDE-TREE:   vector<
    507 // CHECK-ELIDE-TREE:     [(no qualifiers) != const] vector<
    508 // CHECK-ELIDE-TREE:       [...]>>
    509 // CHECK-NOELIDE-TREE: no matching function for call to 'set18'
    510 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    511 // CHECK-NOELIDE-TREE:   vector<
    512 // CHECK-NOELIDE-TREE:     [(no qualifiers) != const] vector<
    513 // CHECK-NOELIDE-TREE:       int>>
    514 
    515 void set19(vector<volatile vector<int>>) {}
    516 void test19() {
    517   set19(vector<const vector<int>>());
    518 }
    519 // CHECK-ELIDE-NOTREE: no matching function for call to 'set19'
    520 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<[...]>>' to 'vector<volatile vector<[...]>>' for 1st argument
    521 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set19'
    522 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<int>>' to 'vector<volatile vector<int>>' for 1st argument
    523 // CHECK-ELIDE-TREE: no matching function for call to 'set19'
    524 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    525 // CHECK-ELIDE-TREE:   vector<
    526 // CHECK-ELIDE-TREE:     [const != volatile] vector<
    527 // CHECK-ELIDE-TREE:       [...]>>
    528 // CHECK-NOELIDE-TREE: no matching function for call to 'set19'
    529 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    530 // CHECK-NOELIDE-TREE:   vector<
    531 // CHECK-NOELIDE-TREE:     [const != volatile] vector<
    532 // CHECK-NOELIDE-TREE:       int>>
    533 
    534 void set20(vector<const volatile vector<int>>) {}
    535 void test20() {
    536   set20(vector<const vector<int>>());
    537 }
    538 // CHECK-ELIDE-NOTREE: no matching function for call to 'set20'
    539 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<[...]>>' to 'vector<const volatile vector<[...]>>' for 1st argument
    540 // CHECK-NOELIDE-NOTREE: no matching function for call to 'set20'
    541 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<const vector<int>>' to 'vector<const volatile vector<int>>' for 1st argument
    542 // CHECK-ELIDE-TREE: no matching function for call to 'set20'
    543 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    544 // CHECK-ELIDE-TREE:   vector<
    545 // CHECK-ELIDE-TREE:     [const != const volatile] vector<
    546 // CHECK-ELIDE-TREE:       [...]>>
    547 // CHECK-NOELIDE-TREE: no matching function for call to 'set20'
    548 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    549 // CHECK-NOELIDE-TREE:   vector<
    550 // CHECK-NOELIDE-TREE:     [const != const volatile] vector<
    551 // CHECK-NOELIDE-TREE:       int>>
    552 
    553 
    554 // Checks that volatile does not show up in diagnostics.
    555 template<typename T> struct S21 {};
    556 template<typename T> using U21 = volatile S21<T>;
    557 int f21(vector<const U21<int>>);
    558 int k21 = f21(vector<U21<int>>());
    559 // CHECK-ELIDE-NOTREE: no matching function for call to 'f21'
    560 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<U21<[...]>>' to 'vector<const U21<[...]>>' for 1st argument
    561 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f21'
    562 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<U21<int>>' to 'vector<const U21<int>>' for 1st argument
    563 // CHECK-ELIDE-TREE: no matching function for call to 'f21'
    564 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    565 // CHECK-ELIDE-TREE:    vector<
    566 // CHECK-ELIDE-TREE:      [(no qualifiers) != const] U21<
    567 // CHECK-ELIDE-TREE:        [...]>>
    568 // CHECK-NOELIDE-TREE: no matching function for call to 'f21'
    569 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    570 // CHECK-NOELIDE-TREE:    vector<
    571 // CHECK-NOELIDE-TREE:      [(no qualifiers) != const] U21<
    572 // CHECK-NOELIDE-TREE:        int>>
    573 
    574 // Checks that volatile does not show up in diagnostics.
    575 template<typename T> struct S22 {};
    576 template<typename T> using U22 = volatile S22<T>;
    577 int f22(vector<volatile const U22<int>>);
    578 int k22 = f22(vector<volatile U22<int>>());
    579 // CHECK-ELIDE-NOTREE: no matching function for call to 'f22'
    580 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<U22<[...]>>' to 'vector<const U22<[...]>>' for 1st argument
    581 // CHECK-NOELIDE-NOTREE: no matching function for call to 'f22'
    582 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'vector<U22<int>>' to 'vector<const U22<int>>' for 1st argument
    583 // CHECK-ELIDE-TREE: no matching function for call to 'f22'
    584 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    585 // CHECK-ELIDE-TREE:    vector<
    586 // CHECK-ELIDE-TREE:      [(no qualifiers) != const] U22<
    587 // CHECK-ELIDE-TREE:        [...]>>
    588 // CHECK-NOELIDE-TREE: no matching function for call to 'f22'
    589 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    590 // CHECK-NOELIDE-TREE:    vector<
    591 // CHECK-NOELIDE-TREE:      [(no qualifiers) != const] U22<
    592 // CHECK-NOELIDE-TREE:        int>>
    593 
    594 // Testing qualifiers and typedefs.
    595 template <class T> struct D23{};
    596 template <class T> using C23 = D23<T>;
    597 typedef const C23<int> B23;
    598 template<class ...T> using A23 = B23;
    599 
    600 void foo23(D23<A23<>> b) {}
    601 void test23() {
    602   foo23(D23<D23<char>>());
    603   foo23(C23<char>());
    604 }
    605 
    606 // CHECK-ELIDE-NOTREE: no matching function for call to 'foo23'
    607 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'D23<D23<char>>' to 'D23<const D23<int>>' for 1st argument
    608 // CHECK-ELIDE-NOTREE: no matching function for call to 'foo23'
    609 // CHECK-ELIDE-NOTREE: candidate function not viable: no known conversion from 'D23<char>' to 'D23<A23<>>' for 1st argument
    610 // CHECK-NOELIDE-NOTREE: no matching function for call to 'foo23'
    611 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'D23<D23<char>>' to 'D23<const D23<int>>' for 1st argument
    612 // CHECK-NOELIDE-NOTREE: no matching function for call to 'foo23'
    613 // CHECK-NOELIDE-NOTREE: candidate function not viable: no known conversion from 'D23<char>' to 'D23<A23<>>' for 1st argument
    614 // CHECK-ELIDE-TREE: no matching function for call to 'foo23'
    615 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    616 // CHECK-ELIDE-TREE:   D23<
    617 // CHECK-ELIDE-TREE:     [(no qualifiers) != const] D23<
    618 // CHECK-ELIDE-TREE:       [char != int]>>
    619 // CHECK-ELIDE-TREE: no matching function for call to 'foo23'
    620 // CHECK-ELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    621 // CHECK-ELIDE-TREE:   D23<
    622 // CHECK-ELIDE-TREE:     [char != A23<>]>
    623 // CHECK-NOELIDE-TREE: no matching function for call to 'foo23'
    624 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    625 // CHECK-NOELIDE-TREE:   D23<
    626 // CHECK-NOELIDE-TREE:     [(no qualifiers) != const] D23<
    627 // CHECK-NOELIDE-TREE:       [char != int]>>
    628 // CHECK-NOELIDE-TREE: no matching function for call to 'foo23'
    629 // CHECK-NOELIDE-TREE: candidate function not viable: no known conversion from argument type to parameter type for 1st argument
    630 // CHECK-NOELIDE-TREE:   D23<
    631 // CHECK-NOELIDE-TREE:     [char != A23<>]>
    632 
    633 namespace PR14015 {
    634 template <unsigned N> class Foo1 {};
    635 template <unsigned N = 2> class Foo2 {};
    636 template <unsigned ...N> class Foo3 {};
    637 
    638 void Play1() {
    639   Foo1<1> F1;
    640   Foo1<2> F2, F3;
    641   F2 = F1;
    642   F1 = F2;
    643   F2 = F3;
    644   F3 = F2;
    645 }
    646 
    647 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    648 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo1<1>' to 'const Foo1<2>' for 1st argument
    649 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo1<1>' to 'Foo1<2>' for 1st argument
    650 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    651 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo1<2>' to 'const Foo1<1>' for 1st argument
    652 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo1<2>' to 'Foo1<1>' for 1st argument
    653 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    654 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo1<1>' to 'const Foo1<2>' for 1st argument
    655 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo1<1>' to 'Foo1<2>' for 1st argument
    656 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    657 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo1<2>' to 'const Foo1<1>' for 1st argument
    658 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo1<2>' to 'Foo1<1>' for 1st argument
    659 // CHECK-ELIDE-TREE: no viable overloaded '='
    660 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    661 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo1<
    662 // CHECK-ELIDE-TREE:     [1 != 2]>
    663 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    664 // CHECK-ELIDE-TREE:   Foo1<
    665 // CHECK-ELIDE-TREE:     [1 != 2]>
    666 // CHECK-ELIDE-TREE: no viable overloaded '='
    667 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    668 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo1<
    669 // CHECK-ELIDE-TREE:     [2 != 1]>
    670 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    671 // CHECK-ELIDE-TREE:   Foo1<
    672 // CHECK-ELIDE-TREE:     [2 != 1]>
    673 // CHECK-NOELIDE-TREE: no viable overloaded '='
    674 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    675 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo1<
    676 // CHECK-NOELIDE-TREE:     [1 != 2]>
    677 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    678 // CHECK-NOELIDE-TREE:   Foo1<
    679 // CHECK-NOELIDE-TREE:     [1 != 2]>
    680 // CHECK-NOELIDE-TREE: no viable overloaded '='
    681 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    682 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo1<
    683 // CHECK-NOELIDE-TREE:     [2 != 1]>
    684 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    685 // CHECK-NOELIDE-TREE:   Foo1<
    686 // CHECK-NOELIDE-TREE:     [2 != 1]>
    687 
    688 void Play2() {
    689   Foo2<1> F1;
    690   Foo2<> F2, F3;
    691   F2 = F1;
    692   F1 = F2;
    693   F2 = F3;
    694   F3 = F2;
    695 }
    696 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    697 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo2<1>' to 'const Foo2<2>' for 1st argument
    698 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo2<1>' to 'Foo2<2>' for 1st argument
    699 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    700 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo2<(default) 2>' to 'const Foo2<1>' for 1st argument
    701 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo2<(default) 2>' to 'Foo2<1>' for 1st argument
    702 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    703 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo2<1>' to 'const Foo2<2>' for 1st argument
    704 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo2<1>' to 'Foo2<2>' for 1st argument
    705 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    706 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo2<(default) 2>' to 'const Foo2<1>' for 1st argument
    707 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo2<(default) 2>' to 'Foo2<1>' for 1st argument
    708 // CHECK-ELIDE-TREE: no viable overloaded '='
    709 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    710 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo2<
    711 // CHECK-ELIDE-TREE:     [1 != 2]>
    712 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    713 // CHECK-ELIDE-TREE:   Foo2<
    714 // CHECK-ELIDE-TREE:     [1 != 2]>
    715 // CHECK-ELIDE-TREE: no viable overloaded '='
    716 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    717 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo2<
    718 // CHECK-ELIDE-TREE:     [(default) 2 != 1]>
    719 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    720 // CHECK-ELIDE-TREE:   Foo2<
    721 // CHECK-ELIDE-TREE:     [(default) 2 != 1]>
    722 // CHECK-NOELIDE-TREE: no viable overloaded '='
    723 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    724 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo2<
    725 // CHECK-NOELIDE-TREE:     [1 != 2]>
    726 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    727 // CHECK-NOELIDE-TREE:   Foo2<
    728 // CHECK-NOELIDE-TREE:     [1 != 2]>
    729 // CHECK-NOELIDE-TREE: no viable overloaded '='
    730 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    731 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo2<
    732 // CHECK-NOELIDE-TREE:     [(default) 2 != 1]>
    733 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    734 // CHECK-NOELIDE-TREE:   Foo2<
    735 // CHECK-NOELIDE-TREE:     [(default) 2 != 1]>
    736 
    737 void Play3() {
    738   Foo3<1> F1;
    739   Foo3<2, 1> F2, F3;
    740   F2 = F1;
    741   F1 = F2;
    742   F2 = F3;
    743   F3 = F2;
    744 }
    745 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    746 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo3<1, (no argument)>' to 'const Foo3<2, 1>' for 1st argument
    747 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo3<1, (no argument)>' to 'Foo3<2, 1>' for 1st argument
    748 // CHECK-ELIDE-NOTREE: no viable overloaded '='
    749 // CHECK-ELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo3<2, 1>' to 'const Foo3<1, (no argument)>' for 1st argument
    750 // CHECK-ELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo3<2, 1>' to 'Foo3<1, (no argument)>' for 1st argument
    751 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    752 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo3<1, (no argument)>' to 'const Foo3<2, 1>' for 1st argument
    753 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo3<1, (no argument)>' to 'Foo3<2, 1>' for 1st argument
    754 // CHECK-NOELIDE-NOTREE: no viable overloaded '='
    755 // CHECK-NOELIDE-NOTREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from 'Foo3<2, 1>' to 'const Foo3<1, (no argument)>' for 1st argument
    756 // CHECK-NOELIDE-NOTREE: candidate function (the implicit move assignment operator) not viable: no known conversion from 'Foo3<2, 1>' to 'Foo3<1, (no argument)>' for 1st argument
    757 // CHECK-ELIDE-TREE: no viable overloaded '='
    758 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    759 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo3<
    760 // CHECK-ELIDE-TREE:     [1 != 2],
    761 // CHECK-ELIDE-TREE:     [(no argument) != 1]>
    762 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    763 // CHECK-ELIDE-TREE:   Foo3<
    764 // CHECK-ELIDE-TREE:     [1 != 2],
    765 // CHECK-ELIDE-TREE:     [(no argument) != 1]>
    766 // CHECK-ELIDE-TREE: no viable overloaded '='
    767 // CHECK-ELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    768 // CHECK-ELIDE-TREE:   [(no qualifiers) != const] Foo3<
    769 // CHECK-ELIDE-TREE:     [2 != 1],
    770 // CHECK-ELIDE-TREE:     [1 != (no argument)]>
    771 // CHECK-ELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    772 // CHECK-ELIDE-TREE:   Foo3<
    773 // CHECK-ELIDE-TREE:     [2 != 1],
    774 // CHECK-ELIDE-TREE:     [1 != (no argument)]>
    775 // CHECK-NOELIDE-TREE: no viable overloaded '='
    776 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    777 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo3<
    778 // CHECK-NOELIDE-TREE:     [1 != 2],
    779 // CHECK-NOELIDE-TREE:     [(no argument) != 1]>
    780 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    781 // CHECK-NOELIDE-TREE:   Foo3<
    782 // CHECK-NOELIDE-TREE:     [1 != 2],
    783 // CHECK-NOELIDE-TREE:     [(no argument) != 1]>
    784 // CHECK-NOELIDE-TREE: no viable overloaded '='
    785 // CHECK-NOELIDE-TREE: candidate function (the implicit copy assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    786 // CHECK-NOELIDE-TREE:   [(no qualifiers) != const] Foo3<
    787 // CHECK-NOELIDE-TREE:     [2 != 1],
    788 // CHECK-NOELIDE-TREE:     [1 != (no argument)]>
    789 // CHECK-NOELIDE-TREE: candidate function (the implicit move assignment operator) not viable: no known conversion from argument type to parameter type for 1st argument
    790 // CHECK-NOELIDE-TREE:   Foo3<
    791 // CHECK-NOELIDE-TREE:     [2 != 1],
    792 // CHECK-NOELIDE-TREE:     [1 != (no argument)]>
    793 }
    794 
    795 namespace PR14342 {
    796   template<typename T, short a> struct X {};
    797   X<int, (signed char)-1> x = X<long, -1>();
    798   X<int, 3UL> y = X<int, 2>();
    799   // CHECK-ELIDE-NOTREE: error: no viable conversion from 'X<long, [...]>' to 'X<int, [...]>'
    800   // CHECK-ELIDE-NOTREE: error: no viable conversion from 'X<[...], 2>' to 'X<[...], 3>'
    801 }
    802 
    803 namespace PR14489 {
    804   // The important thing here is that the diagnostic diffs a template specialization
    805   // with no arguments against itself.  (We might need a different test if this
    806   // diagnostic changes).
    807   template<class ...V>
    808   struct VariableList   {
    809     void ConnectAllToAll(VariableList<>& params = VariableList<>())    {
    810     }
    811   };
    812   // CHECK-ELIDE-NOTREE: non-const lvalue reference to type 'VariableList<>' cannot bind to a temporary of type 'VariableList<>'
    813 }
    814 
    815 namespace rdar12456626 {
    816   struct IntWrapper {
    817     typedef int type;
    818   };
    819 
    820   template<typename T, typename T::type V>
    821   struct X { };
    822 
    823   struct A {
    824     virtual X<IntWrapper, 1> foo();
    825   };
    826 
    827   struct B : A {
    828     // CHECK-ELIDE-NOTREE: virtual function 'foo' has a different return type
    829     virtual X<IntWrapper, 2> foo();
    830   };
    831 }
    832 
    833 namespace PR15023 {
    834   // Don't crash when non-QualTypes are passed to a diff modifier.
    835   template <typename... Args>
    836   void func(void (*func)(Args...), Args...) { }
    837 
    838   void bar(int, int &) {
    839   }
    840 
    841   void foo(int x) {
    842     func(bar, 1, x)
    843   }
    844   // CHECK-ELIDE-NOTREE: no matching function for call to 'func'
    845   // CHECK-ELIDE-NOTREE: candidate template ignored: deduced conflicting types for parameter 'Args' (<int, int &> vs. <int, int>)
    846 }
    847 
    848 namespace rdar12931988 {
    849   namespace A {
    850     template<typename T> struct X { };
    851   }
    852 
    853   namespace B {
    854     template<typename T> struct X { };
    855   }
    856 
    857   void foo(A::X<int> &ax, B::X<int> bx) {
    858     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    859     // CHECK-ELIDE-NOTREE: no known conversion from 'B::X<int>' to 'const rdar12931988::A::X<int>'
    860     ax = bx;
    861   }
    862 
    863   template<template<typename> class> class Y {};
    864 
    865   void bar(Y<A::X> ya, Y<B::X> yb) {
    866     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    867     // CHECK-ELIDE-NOTREE: no known conversion from 'Y<template rdar12931988::B::X>' to 'Y<template rdar12931988::A::X>'
    868     ya = yb;
    869   }
    870 }
    871 
    872 namespace ValueDecl {
    873   int int1, int2, default_int;
    874   template <const int& T = default_int>
    875   struct S {};
    876 
    877   typedef S<int1> T1;
    878   typedef S<int2> T2;
    879   typedef S<> TD;
    880 
    881   void test() {
    882     T1 t1;
    883     T2 t2;
    884     TD td;
    885 
    886     t1 = t2;
    887     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    888     // CHECK-ELIDE-NOTREE: no known conversion from 'S<int2>' to 'S<int1>'
    889 
    890     t2 = t1;
    891     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    892     // CHECK-ELIDE-NOTREE: no known conversion from 'S<int1>' to 'S<int2>'
    893 
    894     td = t1;
    895     // TODO: Find out why (default) isn't printed on second template.
    896     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    897     // CHECK-ELIDE-NOTREE: no known conversion from 'S<int1>' to 'S<default_int>'
    898 
    899     t2 = td;
    900     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    901     // CHECK-ELIDE-NOTREE: no known conversion from 'S<(default) default_int>' to 'S<int2>'
    902 
    903   }
    904 }
    905 
    906 namespace DependentDefault {
    907   template <typename> struct Trait {
    908     enum { V = 40 };
    909     typedef int Ty;
    910     static int I;
    911   };
    912   int other;
    913 
    914   template <typename T, int = Trait<T>::V > struct A {};
    915   template <typename T, typename = Trait<T>::Ty > struct B {};
    916   template <typename T, int& = Trait<T>::I > struct C {};
    917 
    918   void test() {
    919 
    920     A<int> a1;
    921     A<char> a2;
    922     A<int, 10> a3;
    923     a1 = a2;
    924     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    925     // CHECK-ELIDE-NOTREE: no known conversion from 'A<char, [...]>' to 'A<int, [...]>'
    926     a3 = a1;
    927     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    928     // CHECK-ELIDE-NOTREE: no known conversion from 'A<[...], (default) 40>' to 'A<[...], 10>'
    929     a2 = a3;
    930     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    931     // CHECK-ELIDE-NOTREE: no known conversion from 'A<int, 10>' to 'A<char, 40>'
    932 
    933     B<int> b1;
    934     B<char> b2;
    935     B<int, char> b3;
    936     b1 = b2;
    937     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    938     // CHECK-ELIDE-NOTREE: no known conversion from 'B<char, [...]>' to 'B<int, [...]>'
    939     b3 = b1;
    940     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    941     // CHECK-ELIDE-NOTREE: no known conversion from 'B<[...], (default) int>' to 'B<[...], char>'
    942     b2 = b3;
    943     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    944     // CHECK-ELIDE-NOTREE: no known conversion from 'B<int, char>' to 'B<char, int>'
    945 
    946     C<int> c1;
    947     C<char> c2;
    948     C<int, other> c3;
    949     c1 = c2;
    950     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    951     // CHECK-ELIDE-NOTREE: no known conversion from 'C<char, (default) I>' to 'C<int, I>'
    952     c3 = c1;
    953     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    954     // CHECK-ELIDE-NOTREE: no known conversion from 'C<[...], (default) I>' to 'C<[...], other>'
    955     c2 = c3;
    956     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    957     // CHECK-ELIDE-NOTREE: no known conversion from 'C<int, other>' to 'C<char, I>'
    958   }
    959 }
    960 
    961 namespace VariadicDefault {
    962   int i1, i2, i3;
    963   template <int = 5, int...> struct A {};
    964   template <int& = i1, int& ...> struct B {};
    965   template <typename = void, typename...> struct C {};
    966 
    967   void test() {
    968     A<> a1;
    969     A<5, 6, 7> a2;
    970     A<1, 2> a3;
    971     a2 = a1;
    972     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    973     // CHECK-ELIDE-NOTREE: no known conversion from 'A<[...], (no argument), (no argument)>' to 'A<[...], 6, 7>'
    974     a3 = a1;
    975     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    976     // CHECK-ELIDE-NOTREE: no known conversion from 'A<(default) 5, (no argument)>' to 'A<1, 2>'
    977 
    978     B<> b1;
    979     B<i1, i2, i3> b2;
    980     B<i2, i3> b3;
    981     b2 = b1;
    982     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    983     // CHECK-ELIDE-NOTREE: no known conversion from 'B<[...], (no argument), (no argument)>' to 'B<[...], i2, i3>'
    984     b3 = b1;
    985     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    986     // CHECK-ELIDE-NOTREE: no known conversion from 'B<(default) i1, (no argument)>' to 'B<i2, i3>'
    987 
    988     B<i1, i2, i3> b4 = b1;
    989     // CHECK-ELIDE-NOTREE: no viable conversion from 'B<[...], (no argument), (no argument)>' to 'B<[...], i2, i3>'
    990     B<i2, i3> b5 = b1;
    991     // CHECK-ELIDE-NOTREE: no viable conversion from 'B<(default) i1, (no argument)>' to 'B<i2, i3>'
    992 
    993     C<> c1;
    994     C<void, void> c2;
    995     C<char, char> c3;
    996     c2 = c1;
    997     // CHECK-ELIDE-NOTREE: no viable overloaded '='
    998     // CHECK-ELIDE-NOTREE: no known conversion from 'C<[...], (no argument)>' to 'C<[...], void>'
    999     c3 = c1;
   1000     // CHECK-ELIDE-NOTREE: no viable overloaded '='
   1001     // CHECK-ELIDE-NOTREE: no known conversion from 'C<(default) void, (no argument)>' to 'C<char, char>'
   1002   }
   1003 }
   1004 
   1005 namespace PointerArguments {
   1006   template <int *p> class T {};
   1007   template <int* ...> class U {};
   1008   int a, b, c;
   1009   int z[5];
   1010   void test() {
   1011     T<&a> ta;
   1012     T<z> tz;
   1013     T<&b> tb(ta);
   1014     // CHECK-ELIDE-NOTREE: no matching constructor for initialization of 'T<&b>'
   1015     // CHECK-ELIDE-NOTREE: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'T<&a>' to 'const T<&b>' for 1st argument
   1016     T<&c> tc(tz);
   1017     // CHECK-ELIDE-NOTREE: no matching constructor for initialization of 'T<&c>'
   1018     // CHECK-ELIDE-NOTREE: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'T<z>' to 'const T<&c>' for 1st argument
   1019 
   1020     U<&a, &a> uaa;
   1021     U<&b> ub(uaa);
   1022     // CHECK-ELIDE-NOTREE: no matching constructor for initialization of 'U<&b>'
   1023     // CHECK-ELIDE-NOTREE: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'U<&a, &a>' to 'const U<&b, (no argument)>' for 1st argument
   1024 
   1025     U<&b, &b, &b> ubbb(uaa);
   1026     // CHECK-ELIDE-NOTREE: no matching constructor for initialization of 'U<&b, &b, &b>'
   1027     // CHECK-ELIDE-NOTREE: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'U<&a, &a, (no argument)>' to 'const U<&b, &b, &b>' for 1st argument
   1028 
   1029   }
   1030 }
   1031 
   1032 namespace DependentInt {
   1033   template<int Num> struct INT;
   1034 
   1035   template <class CLASS, class Int_wrapper = INT<CLASS::val> >
   1036   struct C;
   1037 
   1038   struct N {
   1039     static const int val = 1;
   1040   };
   1041 
   1042   template <class M_T>
   1043   struct M {};
   1044 
   1045   void test() {
   1046     using T1 = M<C<int, INT<0>>>;
   1047     using T2 = M<C<N>>;
   1048     T2 p;
   1049     T1 x = p;
   1050     // CHECK-ELIDE-NOTREE: no viable conversion from 'M<C<struct DependentInt::N, INT<1>>>' to 'M<C<int, INT<0>>>'
   1051   }
   1052 }
   1053 
   1054 namespace PR17510 {
   1055 class Atom;
   1056 
   1057 template <typename T> class allocator;
   1058 template <typename T, typename A> class vector;
   1059 
   1060 typedef vector<const Atom *, allocator<const Atom *> > AtomVector;
   1061 
   1062 template <typename T, typename A = allocator<const Atom *> > class vector {};
   1063 
   1064 void foo() {
   1065   vector<Atom *> v;
   1066   AtomVector v2(v);
   1067   // CHECK-ELIDE-NOTREE: no known conversion from 'vector<class PR17510::Atom *, [...]>' to 'const vector<const class PR17510::Atom *, [...]>'
   1068 }
   1069 }
   1070 
   1071 namespace PR15677 {
   1072 template <bool>
   1073 struct A{};
   1074 
   1075 template <typename T>
   1076 using B = A<T::value>;
   1077 
   1078 template <typename T>
   1079 using B = A<!T::value>;
   1080 // CHECK-ELIDE-NOTREE: type alias template redefinition with different types ('A<!T::value>' vs 'A<T::value>')
   1081 
   1082 template <int>
   1083 struct C{};
   1084 
   1085 template <typename T>
   1086 using D = C<T::value>;
   1087 
   1088 template <typename T>
   1089 using D = C<T::value + 1>;
   1090 // CHECK-ELIDE-NOTREE: type alias template redefinition with different types ('C<T::value + 1>' vs 'C<T::value>')
   1091 
   1092 template <typename T>
   1093 using E = C<T::value>;
   1094 
   1095 template <typename T>
   1096 using E = C<42>;
   1097 // CHECK-ELIDE-NOTREE: type alias template redefinition with different types ('C<42>' vs 'C<T::value>')
   1098 
   1099 template <typename T>
   1100 using F = C<T::value>;
   1101 
   1102 template <typename T>
   1103 using F = C<21 + 21>;
   1104 // CHECK-ELIDE-NOTREE: type alias template redefinition with different types ('C<21 + 21 aka 42>' vs 'C<T::value>')
   1105 }
   1106 }
   1107 
   1108 // CHECK-ELIDE-NOTREE: {{[0-9]*}} errors generated.
   1109 // CHECK-NOELIDE-NOTREE: {{[0-9]*}} errors generated.
   1110 // CHECK-ELIDE-TREE: {{[0-9]*}} errors generated.
   1111 // CHECK-NOELIDE-TREE: {{[0-9]*}} errors generated.
   1112