29 Numerics library [numerics]

29.5 Complex numbers [complex.numbers]

29.5.4 complex member functions [complex.members]

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template<class T> constexpr complex(const T& re = T(), const T& im = T());
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Effects: Constructs an object of class complex.
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Postconditions: real() == re && imag() == im.
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constexpr T real() const;
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Returns: The value of the real component.
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void real(T val);
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Effects: Assigns val to the real component.
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constexpr T imag() const;
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Returns: The value of the imaginary component.
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void imag(T val);
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Effects: Assigns val to the imaginary component.