On 14 April 2018 at 15:38, Murray Cumming wrote:
What are you using from C++17?
Nothing major. Just some constexpr if, std::apply() and std::invoke():
https://github.com/libsigcplusplus/libsigcplusplus/commits/master
GCC's C++17 implementation is not stable yet, so there are still ABI
changes possible between GCC 8 and GCC 9.
IIRC we've already introduced some (minor) incompatibilities between
the std::variant in GCC 7 and GCC 8.
gtkmm-4.0 is itself unstable, so that's not a problem. And I see no
sign that GTK+ 4.0 will become stable any time soon.
Would it be acceptable to use std::optional in gtkmm-4.0?
I'm planning to wrap the new GtkGestureStylus class.
gboolean gtk_gesture_stylus_get_axis(GtkGestureStylus *gesture, GdkAxisUse
axis, gdouble *value);
could then become
std::optional<double> get_axis(Gdk::AxisUse axis) const;
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**
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