fix new warnings and escape apply namespace

- `std::apply` is part of C++17 and the compiler wants to use it because
of ADL. Thus it is now necessary to escape it as `::apply`.
- remove some `using namespace std` remaining in the sources.
- fix simple warnings.
This commit is contained in:
Johann Dreo 2020-04-28 15:56:14 +02:00
commit 24bc8edd6f
25 changed files with 125 additions and 125 deletions

View file

@ -1339,7 +1339,7 @@ HIDE_UNDOC_RELATIONS = YES
# toolkit from AT&T and Lucent Bell Labs. The other options in this section
# have no effect if this option is set to NO (the default)
HAVE_DOT = NO
HAVE_DOT = YES
# By default doxygen will write a font called FreeSans.ttf to the output
# directory and reference it in all dot files that doxygen generates. This