std::type_info::before (3) - Linux Manuals

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.