std::minus

C++

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Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

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Strings library

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Algorithms library

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Numerics library

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Atomic operations library (C++11)

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Technical Specifications

Utilities library

Type support (basic types, RTTI, type traits)
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Date and time
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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>=
Comparisons (C++20)
strong_order weak_order partial_order strong_equal weak_equal	strong_ordering weak_ordering partial_ordering strong_equality weak_equality	is_eqis_neqis_ltis_lteqis_gtis_gteq
common_comparison_category
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pair tuple (C++11) apply (C++17) make_from_tuple (C++17)	optional (C++17) any (C++17) variant (C++17)
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swap
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Function objects

Function wrappers function (C++11) mem_fn (C++11) bad_function_call (C++11)	Bind bind (C++11) is_bind_expression (C++11) is_placeholder (C++11) _1, _2, _3, ... (C++11)
Function invocation invoke (C++17) Identity function object identity (C++20)	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 (C++17)
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) not1 (until C++20) not2 (until C++20)	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) unary_negate (until C++20) binary_negate (until C++20)

Defined in header <functional>
template< class T > struct minus;		(until C++14)
template< class T = void > struct minus;		(since C++14)

Function object for performing subtraction. Effectively calls operator- on two instances of type T.

Specializations

The standard library provides a specialization of std::minus when T is not specified, which leaves the parameter types and return type to be deduced. minus<void> function object implementing x - y deducing argument and return types (class template specialization)

(since C++14)

Member types Type Definition result_type(deprecated in C++17) T first_argument_type(deprecated in C++17) T second_argument_type(deprecated in C++17) T

(until C++20)

Member functions

operator()

returns the difference between two arguments (public member function)

std::minus::operator()

T operator()( const T& lhs, const T& rhs ) const;		(until C++14)
constexpr T operator()( const T& lhs, const T& rhs ) const;		(since C++14)

Returns the difference between lhs and rhs.

Parameters

lhs, rhs

-

values to subtract from one another

Return value

The result of lhs - rhs.

Exceptions

(none)

Possible implementation

constexpr T operator()(const T &lhs, const T &rhs) const { return lhs - rhs; }