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std::type_info::before

From cppreference.com
< cpp‎ | types‎ | type info
 
 
 
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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.

Contents

[edit] Parameters

rhs - another type information object to compare to

[edit] Return value

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

[edit] Example

#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.

[edit] See also

checks whether the objects refer to the same type
(public member function) [edit]