[llvm-bugs] [Bug 42317] explicit refuses the call to other implicit constructors

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Jun 20 17:56:20 PDT 2019


Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
"return r;" implicitly invokes the copy constructor of B to copy the return
value. You made that constructor explicit, so it can't be implicitly invoked
any more. Most of your example is an irrelevant distraction; the relevant part

struct B {
    explicit B(B const &);

B f() { 
    B r;
    return r;  // error, can't return B here because there is no implicit copy

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