[bug] conan.tools.build.check_min_cppstd does infer default cppstd as documented about conan HOT 1 OPEN

Hi @puetzk

Thanks for your report.

https://docs.conan.io/2/reference/tools/build.html#conan-tools-build-check-min-cppstd says that check_*_cppstd should be able to infer the default cppstd from compiler.version in cases where it has not been overridden:

I think this is a docs bug, it totally looks like a copy & paste from legacy Conan 1 docs of that function. The docs in https://docs.conan.io/2/reference/tools/build.html#conan-tools-build-check-min-cppstd are generated from the docstring, and such docstring was copied verbatim from Conan 1). In Conan 2 it was never the intention to deduce cppstd from compiler version, but compiler.cppstd is recommended to be explicitly defined in most cases.

I'll do a PR to change those docstrings.

from conan.