operator==,!=(std::complex)
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std::complex
operator==operator!=
(until C++20)
(C++26)
(C++26)
(C++26)
Defined in header
<complex>
(1)
template< class T >
bool operator==( const complex<T>& lhs, const complex<T>& rhs );
(until C++14)
bool operator==( const complex<T>& lhs, const complex<T>& rhs );
template< class T >
constexpr bool operator==( const complex<T>& lhs, const complex<T>& rhs );
(since C++14)
constexpr bool operator==( const complex<T>& lhs, const complex<T>& rhs );
(2)
template< class T >
bool operator==( const complex<T>& lhs, const T& rhs );
(until C++14)
bool operator==( const complex<T>& lhs, const T& rhs );
template< class T >
constexpr bool operator==( const complex<T>& lhs, const T& rhs );
(since C++14)
constexpr bool operator==( const complex<T>& lhs, const T& rhs );
(3)
template< class T >
bool operator==( const T& lhs, const complex<T>& rhs );
(until C++14)
bool operator==( const T& lhs, const complex<T>& rhs );
template< class T >
constexpr bool operator==( const T& lhs, const complex<T>& rhs );
(since C++14) constexpr bool operator==( const T& lhs, const complex<T>& rhs );
(until C++20)
(4)
template< class T >
bool operator!=( const complex<T>& lhs, const complex<T>& rhs );
(until C++14)
bool operator!=( const complex<T>& lhs, const complex<T>& rhs );
template< class T >
constexpr bool operator!=( const complex<T>& lhs, const complex<T>& rhs );
(since C++14) constexpr bool operator!=( const complex<T>& lhs, const complex<T>& rhs );
(until C++20)
(5)
template< class T >
bool operator!=( const complex<T>& lhs, const T& rhs );
(until C++14)
bool operator!=( const complex<T>& lhs, const T& rhs );
template< class T >
constexpr bool operator!=( const complex<T>& lhs, const T& rhs );
(since C++14) constexpr bool operator!=( const complex<T>& lhs, const T& rhs );
(until C++20)
(6)
template< class T >
bool operator!=( const T& lhs, const complex<T>& rhs );
(until C++14)
bool operator!=( const T& lhs, const complex<T>& rhs );
template< class T >
constexpr bool operator!=( const T& lhs, const complex<T>& rhs );
(since C++14) constexpr bool operator!=( const T& lhs, const complex<T>& rhs );
(until C++20)
Compares two complex numbers. Scalar arguments are treated as complex numbers with the real part equal to the argument and the imaginary part set to zero.
1-3) Compares lhs and rhs for equality.
4-6) Compares lhs and rhs for inequality.
The != operator is synthesized from operator==.
[edit] Parameters
lhs, rhs
-
the arguments to compare: either both complex numbers or one complex and one scalar of matching type (float, double, long double)
[edit] Return value
1-3) true if respective parts of lhs are equal to rhs, false otherwise.
4-6) !(lhs == rhs)
[edit] Example
Run this code
#include <complex> int main() { using std::operator""i; // or: using namespace std::complex_literals; static_assert(1.0i == 1.0i); static_assert(2.0i != 1.0i); constexpr std::complex z(1.0, 0.0); static_assert(z == 1.0); static_assert(1.0 == z); static_assert(2.0 != z); static_assert(z != 2.0); }