GorNishanov added inline comments.
================
Comment at: lib/Sema/SemaCoroutine.cpp:1062
+ // an argument list."
+ for (auto *PD : FD.parameters()) {
+ if (PD->getType()->isDependentType())
----------------
GorNishanov wrote:
> This does not implement TS specified behavior for non static member functions:
>
> [dcl.fct.def.coroutine]/7 states that an argument list is build up as
> follows:
>
> > The first argument is the amount of space requested, and has type
> > std::size_t. The lvalues p1 ... pn are the succeeding arguments.
>
> Where p1 ... pn are defined earlier in
>
> [dcl.fct.def.coroutine]/3 as:
>
> > For a coroutine f that is a non-static member function, let P1 denote the
> > type of the implicit object parameter (13.3.1) and P2 ... Pn be the types
> > of the function parameters; otherwise let P1 ... Pn be the types of the
> > function parameters.
>
> Essentially for non-static member functions, we need to insert implicit
> object parameter.
>
> Note that lookupPromiseType in SemaCoroutine.cpp when building specialization
> of `std::experimental::coroutine_traits<...>` includes implicit object
> parameter:
>
> ```
> // If the function is a non-static member function, add the type
> // of the implicit object parameter before the formal parameters.
> if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) {
> if (MD->isInstance()) {
> // [over.match.funcs]4
> // For non-static member functions, the type of the implicit object
> // parameter is
> // -- "lvalue reference to cv X" for functions declared without a
> // ref-qualifier or with the & ref-qualifier
> // -- "rvalue reference to cv X" for functions declared with the &&
> // ref-qualifier
> QualType T =
> MD->getThisType(S.Context)->getAs<PointerType>()->getPointeeType();
> T = FnType->getRefQualifier() == RQ_RValue
> ? S.Context.getRValueReferenceType(T)
> : S.Context.getLValueReferenceType(T, /*SpelledAsLValue*/ true);
> AddArg(T);
> }
> }
> ```
I think promise constructor argument preview is also missing the implicit
object parameter.
Repository:
rC Clang
https://reviews.llvm.org/D42606
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