std::reduce not known with C++17 enabled

Asperamanca

I have a large project in Creator, configured to use Qt 5.15.1 with MinGW 8.1.0 64bit.

The project files has

CONFIG += c++17

However, Creator shows a semantic issue

no member named 'reduce' in namespace 'std'

Any ideas what I could try?

Christian Ehrlicher

@Asperamanca said in std::reduce not known with C++17 enabled:

However, Creator shows a semantic issue

QtCreator or the compiler?

Asperamanca

@Christian-Ehrlicher
QtCreator. Probably from the clang backend
However, the selected kit is relevant, because switching to MSVC-based toolchain makes the semantic issue disappear.

I have wondered whether
a) Enabling c++17 for MinGW isn't that straightforward (been there in the past, but can't remember the details)
b) The MinGW shipped with Qt 5.15.1 isn't fully c++17 compliant (I'd love to check the MinGW docs, but they are a right mess - there's nothing like an easy-to-find release notes list for version)