std::binder1st, std::binder2nd

 

C++

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Technical Specifications

 

Utilities library

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initializer_list (C++11)

bitset

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rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

optional, any and variant (C++17)

optional

any

variant

in_placein_place_typein_place_indexin_place_tin_place_type_tin_place_index_t

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pair

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Function objects

Function wrappers function (C++11) mem_fn (C++11) bad_function_call (C++11) invoke (C++17)	Bind bind (C++11) is_bind_expression (C++11) is_placeholder (C++11) _1, _2, _3, ... (C++11)
Reference wrappers
reference_wrapper (C++11)
refcref (C++11)(C++11)
Operator wrappers
plus minus negate multiplies divides modulus logical_and logical_or logical_not	equal_to not_equal_to greater less greater_equal less_equal bit_and bit_or bit_xor bit_not (C++14)
Negators
not_fn not1 (deprecated) not2 (deprecated)	unary_negate (deprecated) binary_negate (deprecated)
Searchers
default_searcher (C++17)
boyer_moore_searcher (C++17)
boyer_moore_horspool_searcher (C++17)
Old binders and adaptors
unary_function (until C++17) binary_function (until C++17) ptr_fun (until C++17) pointer_to_unary_function (until C++17) pointer_to_binary_function (until C++17) mem_fun (until C++17) mem_fun_tmem_fun1_tconst_mem_fun_tconst_mem_fun1_t (until C++17)(until C++17)(until C++17)(until C++17)	binder1stbinder2nd (until C++17)(until C++17) bind1stbind2nd (until C++17)(until C++17) mem_fun_ref (until C++17) mem_fun_ref_tmem_fun1_ref_tconst_mem_fun_ref_tconst_mem_fun1_ref_t (until C++17)(until C++17)(until C++17)(until C++17)

 

template< class Fn > class binder1st : public std::unary_function<typename Fn::second_argument_type,                                              typename Fn::result_type> { protected:         Fn op;     typename Fn::first_argument_type value; public:     binder1st(const Fn& fn,               const typename Fn::first_argument_type& value);     typename Fn::result_type         operator()(const typename Fn::second_argument_type& x) const;     typename Fn::result_type         operator()(typename Fn::second_argument_type& x) const; };	(1)	(until C++17) (deprecated since C++11)
template< class Fn > class binder2nd : public unary_function<typename Fn::first_argument_type,                                         typename Fn::result_type> { protected:     Fn op;     typename Fn::second_argument_type value; public:     binder2nd(const Fn& fn,               const typename Fn::second_argument_type& value);     typename Fn::result_type         operator()(const typename Fn::first_argument_type& x) const;     typename Fn::result_type         operator()(typename Fn::first_argument_type& x) const; };	(2)	(until C++17) (deprecated since C++11)

A function object that binds an argument to a binary function.

The value of the parameter is passed to the object at the construction time and stored within the object. Whenever the function object is invoked though operator(), the stored value is passed as one of the arguments, the other argument is passed as an argument of operator(). The resulting function object is an unary function.

1) Binds the first parameter to the value value given at the construction of the object.

2) Binds the second parameter to the value value given at the construction of the object.

See also

bind1stbind2nd (until C++17)(until C++17)

binds one argument to a binary function (function template)