Commitdc90c30

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Merge pull request#1068 from NVIDIA/fix-basic-sender-lambda-return-type

replace deduced return type in the `__basic_sender` lambda with a `decltype`

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Lines changed: 7 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -159,14 +159,20 @@ namespace stdexec {`
`159`	`159`	`}`
`160`	`160`	`};`
`161`	`161`
	`162`	`+// Rather strange definition of the lambda return type below is to reap the`
	`163`	`+// benefits of SFINAE without nvc++ encoding the whole return type into the`
	`164`	`+// symbol name.`
	`165`	`+template<class_Ty>`
	`166`	`+extern_Ty(*__f)();`
	`167`	`+`
`162`	`168`	`// Anonymous namespace here is to avoid symbol name collisions with the`
`163`	`169`	`// lambda functions returned by __make_tuple.`
`164`	`170`	`namespace {`
`165`	`171`	`constexprauto __make_tuple =//`
`166`	`172`	`[]<class_Tag,class... _Captures>(_Tag, _Captures&&... __captures) {`
`167`	`173`	`return [=]<class_Cvref,class_Fun>(_Cvref __cvref, _Fun && __fun)mutable//`
`168`	`174`	`noexcept(__nothrow_callable<_Fun, _Tag, __minvoke<_Captures, _Cvref>...>)//`
`169`		`- ->decltype(auto)//`
	`175`	`+ ->decltype(__f<__call_result_t<_Fun, _Tag, __minvoke<_Captures, _Cvref>...>>())`
`170`	`176`	`requires __callable<_Fun, _Tag, __minvoke<_Captures, _Cvref>...>`
`171`	`177`	`{`
`172`	`178`	`return ((_Fun&&) __fun)(`

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