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std::modulus

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.

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.

modulus<void>

(C++14)

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)(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)

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

Exceptions

May throw implementation-defined exceptions.

Possible implementation

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

fmodfmodffmodl (C++11)(C++11)	remainder of the floating point division operation (function)
remainderremainderfremainderl (C++11)(C++11)(C++11)	signed remainder of the division operation (function)