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Some expressions will cause decltype to yield a reference type. Generally speaking, decltype returns a reference type for expressions that yield objects that can stand on the left-hand side of the assignment

KasimKamal
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2022-07-03
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Some expressions will cause decltype to yield a reference type. Generally speaking, decltype returns a reference type for expressions that yield objects that can stand on the left-hand side of the assignment.

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KasimKamal
2022-07-03
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// decltype of an expression can be a reference type
int i = 42, *p = &i, &r = i;
decltype(r + 0) b; // ok: addition yields an int; b is an (uninitialized) int
decltype(*p) c; // error: c is int& and must be initialized

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