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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"FTBFS: error: reference to ‘array’ is ambiguous","articleBody":"Tried to compile the latest tip of `devel` (2f474a804a381915770981f518493204bb53d3c1) on Debian, but getting a `error: reference to ‘array’ is ambiguous` in `test/clamp.cpp`. Sounds like someone perhaps brought `std::array` to the `af` namespace, hence the ambiguity?\n\nDetailed error:\n\n```\n[ 70%] Building CXX object test/CMakeFiles/clamp_opencl.dir/clamp.cpp.o\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp: In member function ‘virtual void ClampTests_FloatArrayArray_Test::TestBody()’:\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:24:5: error: reference to ‘array’ is ambiguous\n     array in = af::randu(num, f32);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:25:5: error: reference to ‘array’ is ambiguous\n     array lo = af::randu(num, f32)/10;       // Ensure lo \u003c= 0.1\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:26:5: error: reference to ‘array’ is ambiguous\n     array hi = 1.0 - af::randu(num, f32)/10; // Ensure hi \u003e= 0.9\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:27:14: error: ‘lo’ was not declared in this scope\n     af::eval(lo, hi);\n              ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:27:18: error: ‘hi’ was not declared in this scope\n     af::eval(lo, hi);\n                  ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:31:5: error: reference to ‘array’ is ambiguous\n     array out = clamp(in, lo, hi);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:32:5: error: ‘out’ was not declared in this scope\n     out.host(\u0026hout[0]);\n     ^~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:33:5: error: ‘in’ was not declared in this scope\n     in.host(\u0026hin[0]);\n     ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp: In member function ‘virtual void ClampTests_FloatArrayScalar_Test::TestBody()’:\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:46:5: error: reference to ‘array’ is ambiguous\n     array in = af::randu(num, f32);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:47:5: error: reference to ‘array’ is ambiguous\n     array lo = af::randu(num, f32)/10; // Ensure lo \u003c= 0.1\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:51:5: error: reference to ‘array’ is ambiguous\n     array out = clamp(in, lo, hi);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:53:5: error: ‘out’ was not declared in this scope\n     out.host(\u0026hout[0]);\n     ^~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:54:5: error: ‘in’ was not declared in this scope\n     in.host(\u0026hin[0]);\n     ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:55:5: error: ‘lo’ was not declared in this scope\n     lo.host(\u0026hlo[0]);\n     ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp: In member function ‘virtual void ClampTests_FloatScalarArray_Test::TestBody()’:\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:66:5: error: reference to ‘array’ is ambiguous\n     array in = af::randu(num, f32);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:68:5: error: reference to ‘array’ is ambiguous\n     array hi = 1.0 - af::randu(num, f32)/10; // Ensure hi \u003e= 0.9\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:71:5: error: reference to ‘array’ is ambiguous\n     array out = clamp(in, lo, hi);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:73:5: error: ‘out’ was not declared in this scope\n     out.host(\u0026hout[0]);\n     ^~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:74:5: error: ‘in’ was not declared in this scope\n     in.host(\u0026hin[0]);\n     ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:75:5: error: ‘hi’ was not declared in this scope\n     hi.host(\u0026hhi[0]);\n     ^~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp: In member function ‘virtual void ClampTests_FloatScalarScalar_Test::TestBody()’:\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:86:5: error: reference to ‘array’ is ambiguous\n     array in = af::randu(num, f32);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:91:5: error: reference to ‘array’ is ambiguous\n     array out = clamp(in, lo, hi);\n     ^~~~~\nIn file included from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:11:0:\n/home/gvaillan/local/src/arrayfire/include/af/array.h:27:17: note: candidates are: class af::array\n     class AFAPI array {\n                 ^~~~~\nIn file included from /usr/include/c++/6/tuple:39:0,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-port.h:708,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/internal/gtest-internal.h:40,\n                 from /home/gvaillan/local/src/arrayfire/test/../test/gtest/include/gtest/gtest.h:58,\n                 from /home/gvaillan/local/src/arrayfire/test/clamp.cpp:10:\n/usr/include/c++/6/array:90:12: note:                 template\u003cclass _Tp, long unsigned int _Nm\u003e struct std::array\n     struct array\n            ^~~~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:93:5: error: ‘out’ was not declared in this scope\n     out.host(\u0026hout[0]);\n     ^~~\n/home/gvaillan/local/src/arrayfire/test/clamp.cpp:94:5: error: ‘in’ was not declared in this scope\n     in.host(\u0026hin[0]);\n     ^~\n\n```\n","author":{"url":"https://github.com/ghisvail","@type":"Person","name":"ghisvail"},"datePublished":"2016-09-12T08:02:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/1585/arrayfire/issues/1585"}