as_string()

template<typename T >

std::string tts::as_string

(

T const &

e

)

Value-to-string conversion.

When displaying the data required to understand a test's failures, TTS may need to print out value of various types. as_string provides a centralized way to perform such a task by handling most common types including:

• types supporting std::to_string
• types supporting stream insertion
• types supporting unqualified call to to_string
• sequences of such types

as_string takes care of applying any command-line options related to formatting to the value printed.

Examples

#define TTS_MAIN
#include <tts/tts.hpp>
 
namespace space
{
  struct some_type { int i; };
  struct some_other_type { int i; };
 
  std::ostream& operator<<(std::ostream& os, some_other_type const& s)
  {
    return os << "[[" << s.i << "]]";
  }
 
  std::string to_string( some_type const& s ) { return "some_type[" + tts::as_string(s.i) + "]"; }
}
 
TTS_CASE( "Check display of type with specific to_string" )
{
  TTS_EQUAL(tts::as_string( space::some_type{42} )      , "some_type[42]" );
  TTS_EQUAL(tts::as_string( space::some_other_type{63} ), "[[63]]"        );
};

Parameters

e	Value to convert to a string

Returns

the formatted string containing a representation of the value of e