reference to 'std' is ambiguous

With TI Clang v2.1.3.LTS and pasting your code into an empty source file can't repeat the error.

Based on searches (Reference to ' ' is ambiguous and Compiler Error C2872) your "error: reference to 'std' is ambiguous" error could be caused by use of using namespace std in either your source code or an include file.

You could try changing from:

struct integral_constant : std::integral_constant<T, VALUE> {};

To:

struct integral_constant : ::std::integral_constant<T, VALUE> {};

Where the leading :: in front of std uses  ::std::integral_constant from the global namespace.

Hi,

Yes it helps but I didn't understand why.

Why there are many std ? 

Thanks,

Eli

Eli Mordel said:

Why there are many std ? 

Is "error: reference to 'std' is ambiguous" the full error message, or was there some more diagnostic information reported by the compiler?

E.g. I took the example code from reference to function is ambiguous in c++ and the full error reported by TI Clang v2.1.3.LTS was:

Building file: "../test.cpp"
Invoking: Arm Compiler
"/home/mr_halfword/ti/ccs1230/ccs/tools/compiler/ti-cgt-armllvm_2.1.3.LTS/bin/tiarmclang" -c -march=armv7r -mcpu=cortex-r5 -mbig-endian -Og -I"/home/mr_halfword/workspace_v12/AM2634_CPP" -I"/home/mr_halfword/ti/ccs1230/ccs/tools/compiler/ti-cgt-armllvm_2.1.3.LTS/include" -g -MMD -MP -MF"test.d_raw" -MT"test.o"   -o"test.o" "../test.cpp"
subdir_rules.mk:14: recipe for target 'test.o' failed
../test.cpp:19:5: error: reference to 'greater' is ambiguous
    greater(a,b,c);
    ^
../test.cpp:10:6: note: candidate found by name lookup is 'greater'
void greater(int num1, int num2, int num3);
     ^
/home/mr_halfword/ti/ccs1230/ccs/tools/compiler/ti-cgt-armllvm_2.1.3.LTS/include/c++/v1/__functional/operations.h:584:29: note: candidate found by name lookup is 'std::greater'
struct _LIBCPP_TEMPLATE_VIS greater
                            ^
1 error generated.
gmake: *** [test.o] Error 1
gmake: Target 'all' not remade because of errors.

I.e. for the above example TI Clang identified the source of the ambiguity.