cppdraft_translate/cppdraft/linalg/helpers/conj.md

[linalg.helpers.conj]

29 Numerics library [numerics]

29.9 Basic linear algebra algorithms [linalg]

29.9.7 Exposition-only helpers [linalg.helpers]

29.9.7.2 conj-if-needed [linalg.helpers.conj]

1

#

The name conj-if-needed denotes an exposition-only function object.

The expression conj-if-needed(E) for a subexpression E whose type is T is expression-equivalent to:

• (1.1)

conj(E), if T is not an arithmetic type and the expression conj(E) is valid, with overload resolution performed in a context that includes the declarationtemplate U conj(const U&) = delete; If the function selected by overload resolution does not return the complex conjugate of its input, the program is ill-formed, no diagnostic required;

• (1.2)

otherwise, E.