Update all cc code using .clang-format; please do so as well for future PRs
etc.; emacs has a handy 'clang-format' mode to make this automatic.
For comparing old changes with git blame, we can disregard this one using
--ignore-rev
(see https://www.moxio.com/blog/43/ignoring-bulk-change-commits-with-git-blame )
Some #includes were missing for the latter (but only noticeable on some
systems - e.g., build breaks on Cygwin).
So let's replace with something that works equally everywhere.
Fixes: #2060
Add some Rust-style Result/Option types, based on TartanLlama's
expected, optional classes.
There's std::optional of course, but we can't depend on C++17 yet.
Using deque gives compilation errors when compiling on
MacOS/clang (where it defaults to libc++ rather than gcc's libstdc++)
```
#include <deque>
struct Foo { std::deque<Foo> foos; };
int main() { Foo foo; }
```
So, let's use a vector instead; this is a drop-in replacement here, but
unfortunately in some future code...
Seems there are problems compiling mu with XCode 11.6 (see build tests);
apparently because of libc++ being different from libstdc++.
clang++ builds works fine as long as we're using libstdc++.
When this function is declared const or pure, clang at -O1 or higher optimizes
away the call to mu_str_size_s() inside mu_str_size(), so that it ignores its
argument and returns whatever is in mu_str_size_s()'s static buffer.
Found when test-mu-str failed while testing an update of mu in OpenBSD's ports tree.
reimplement the old mu-log.[ch] into mu-logging.{cc,hh}
If available (and using an appropriately equipped glib), log to the
systemd journal
Only g_criticals have stderr output, all the other g_* go to the log
file / journal.
Until now, mu would _not_ follow symlinks; with these changes, we do.
There were some complications with that ~10 years ago, but I forgot the
details. So let's re-enable. At least one thing is in place now: moving
between file systems.
Fixes#1489Fixes#1628 (technically, this came with slightly earlier commit)
