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Apache C++ Standard Library Reference Guide


Library:  General utilities

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A binary function object that returns true if its first argument is less than its second


#include <functional>

namespace std {
  template <class T>
  struct less;


less is a binary function object. Its operator() returns true if x is less than y. You can pass a less object to any algorithm that requires a binary function. For example, the sort() algorithm can accept a binary function as an alternate comparison object to sort a sequence. less would be used in that algorithm in the following manner:

After this call to sort(), vec1 is sorted in ascending order.


See Also

binary_function, Function Objects

Standards Conformance

ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 20.3.3

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