Is there way to check the type of a preprocessor symbol value in C/C++ -

Is there way to check the type of a preprocessor symbol value in C/C++ -

parts of code depend on value of preprocessor symbol:

int a() { #if sdk_version >= 3 homecoming 1; #else homecoming 2; #endif }

the comparing depends of value of sdk_version. expected integer or compares integer, in case, 3. if sdk_version cannot compared integer, there compile error.

is there way abort compilation if sdk_version not of expected type? example:

#if type(sdk_version) != int # not compile, know #error "sdk_version must integer." #endif

use template generate such error:

template<typename t> struct macro_error; template<> struct macro_error<int> {}; template<typename t> void check(t) { macro_error<t> sdk_version_must_be_int; } int ignored = (check(sdk_version), 0);

this code generate compilation error, having next string in it, if sdk_version not int:

sdk_version_must_be_int

see these demo:

http://ideone.com/mwxim (error : #define sdk_version 1.0) http://ideone.com/crjxn (ok : #define sdk_version 1)

and notice error message in first case. prints this:

prog.cpp:9: error: ‘sdk_version_must_be_int’ has incomplete type prog.cpp:9: warning: unused variable ‘sdk_version_must_be_int’

c++ c types preprocessor