std::type_info::before (3) - Linux Man Pages

std::type_info::before: std::type_info::before

NAME

std::type_info::before - std::type_info::before

Synopsis


bool before( const type_info& rhs ) const;


Returns true if the type of this type_info precedes the type of rhs in the implementation's collation order. No guarantees are given; in particular, the collation order can change between the invocations of the same program.

Parameters


rhs - another type information object to compare to

Return value


true if the type of this type_info precedes the type of rhs in the implementation's collation order.

Example


// Run this code


  #include <iostream>
  #include <typeinfo>


  int main()
  {
    if(typeid(int).before(typeid(char)))
      std::cout << "int goes before char in this implementation.\n";
    else
      std::cout << "char goes before int in this implementation.\n";
  }

Possible output:


  char goes before int in this implementation.

See also


           checks whether the objects refer to the same type
operator== (public member function)
operator!=