Not sure if this has been mentioned before, but the following code involving std::inclusive_scan doesn't compile on CF on both "GNU G++17 7.3.0" and "GNU G++17 9.2.0 (64bit, msys 2)". This function is part of the C++17 standard, according to the reference, so it should compile on both versions (and it does compile locally).
inclusive_scan
std::exclusive_scan doesn't compile on CF as well.
exclusive_scan
Standard support != compiler support :(
As far as I see, inclusive_scan start exists with GCC-9. But only overloads with ExecutionPolicy.
And there is another surprise: GCC-9 don't know about execution header Click
So your code start working from GCC-10 Click
It does seem to compile on GCC 9.3, for instance, see https://godbolt.org/z/Yq1Wqes59.
It seems to be the case that the MinGW implementation might not have the corresponding function for
std::inclusive_scanorstd::exclusive_scan, since a closer look at the compiler error (in custom invocation) shows that there are no overloads other than those with an execution policy in the pstl.UPD: For some reason I forgot that the GCC version used on CF is 9.2.0, and not 9.3.0 (and the same compilation error appears on godbolt as well).
I've always thought that every implementation must obey the standard....
Weird. My local is gcc 9.3.0 and both of these codes compiles
Apparently it hadn't been implemented in GCC 9.2.0 (but works in 9.3.0), which is pretty sad. I believe CF should update the compilers to a more modern compiler (maybe GCC 11?), and (what is unrelated), perhaps to C++20 (when it's more stable).
Yes. That'd be great.
I've always thought that every implementation must obey the standard....
Sure in perfect world...
C++20 already exists for smth about year but there is no one compiler fully supporting it (for syntax maybe, but declared new functions — it is questions to standard library developers [library != compiler]).
Weird. My local is gcc 9.3.0 and both of these codes compiles
Maybe on your computer another c++ library (don't know how to know for sure, but there is libc++ and there is libstdc++, maybe on one it was supported but not on another)