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Difference between revisions of "cpp/utility/functional/modulus"

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{{cpp/title|modulus}}
 
{{cpp/title|modulus}}
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{{ddcl list header | functional }}
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{{dcl header|functional}}
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{{dcl|until=c++14|
 
template< class T >
 
template< class T >
 
struct modulus;
 
struct modulus;
 
}}
 
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{{dcl|since=c++14|
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template< class T {{=}} void >
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struct modulus;
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}}
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{{dcl end}}
  
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Function object for computing remainders of divisions.
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Function object for computing remainders of divisions. Implements {{c|operator%}} for type {{tt|T}}.
  
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===Member types===
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===Specializations===
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{{rev begin}}
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{{tdcl list hitem | type | definition }}
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{{rev|since=c++14|
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The standard library provides a specialization of {{tt|std::modulus}} when {{tt|T}} is not specified, which leaves the parameter types and return type to be deduced.
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{{tdcl list item | {{tt|first_argument_type}} | {{tt|T}} }}
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{{dsc begin}}
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{{tdcl list item | {{tt|second_argument_type}} | {{tt|T}} }}
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{{dsc inc|cpp/utility/functional/dsc modulus_void}}
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{{cpp/utility/functional/member types|result=T|arg1=T|arg2=T}}
  
 
===Member functions===
 
===Member functions===
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{{dcl list mem fun | cpp/utility/functional/modulo/operator() | Returns the remainder from the division of its first argument by its second argument}}
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{{dsc mem fun|operator()|nolink=true|returns the remainder from the division of the first argument by the second argument}}
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{{member|{{small|std::modulus::}}operator()|2=
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T operator()( const T& lhs, const T& rhs ) const;
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Returns the remainder of the division of {{c|lhs}} by {{c|rhs}}.
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===Parameters===
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{{par begin}}
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{{par|lhs, rhs|values to divide one by another}}
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{{par end}}
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===Return value===
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The result of {{c|lhs % rhs}}.
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{{cpp/impldef exception}}
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===Possible implementation===
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{{eq fun|1=
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constexpr T operator()(const T& lhs, const T& rhs) const
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{
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    return lhs % rhs;
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}
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}}
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}}
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===See also===
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{{dsc begin}}
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{{dsc inc|cpp/numeric/math/dsc fmod}}
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{{dsc inc|cpp/numeric/math/dsc remainder}}
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{{dsc end}}
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{{langlinks|de|es|fr|it|ja|pt|ru|zh}}

Latest revision as of 21:10, 13 July 2024

 
C++
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
 
Function objects
Function invocation
(C++17)(C++23)
Identity function object
(C++20)
Transparent operator wrappers
(C++14)
(C++14)
(C++14)
(C++14)  
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)
(C++14)

Old binders and adaptors
(until C++17*)
(until C++17*)
(until C++17*)
(until C++17*)
(until C++17*)  
(until C++17*)
(until C++17*)(until C++17*)(until C++17*)(until C++17*)
(until C++20*)
(until C++20*)
(until C++17*)(until C++17*)
(until C++17*)(until C++17*)

(until C++17*)
(until C++17*)(until C++17*)(until C++17*)(until C++17*)
(until C++20*)
(until C++20*)
 
Defined in header <functional>
template< class T >
struct modulus;
 (until C++14)
template< class T = void >
struct modulus;
 (since C++14)

Function object for computing remainders of divisions. Implements operator% for type T.

Contents

[edit] Specializations

The standard library provides a specialization of std::modulus when T is not specified, which leaves the parameter types and return type to be deduced.

(C++14)
 function object implementing x % y deducing parameter and return types
(class template specialization) [edit]
(since C++14)

[edit] Member types

Type Definition
result_type (deprecated in C++17)(removed in C++20) T
first_argument_type (deprecated in C++17)(removed in C++20) T
second_argument_type (deprecated in C++17)(removed in C++20) T

These member types are obtained via publicly inheriting std::binary_function<T, T, T>.

(until C++11)

[edit] Member functions

operator()
 returns the remainder from the division of the first argument by the second argument
(public member function)

std::modulus::operator()

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

Returns the remainder of the division of lhs by rhs.

Parameters

lhs, rhs - values to divide one by another

Return value

The result of lhs % rhs.

[edit] Exceptions

May throw implementation-defined exceptions.

Possible implementation

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

[edit] See also

(C++11)(C++11)
 remainder of the floating point division operation
(function) [edit]
(C++11)(C++11)(C++11)
 signed remainder of the division operation
(function) [edit]
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