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Add an example to the display-supports-face-attributes-p doc string

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* src/xfaces.c (Fdisplay_supports_face_attributes_p): Add an example.
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Lars Ingebrigtsen 2021-11-06 18:52:30 +01:00
parent f921f189ee
commit cf9d85c1ea
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src/xfaces.c
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@ -5373,6 +5373,10 @@ DEFUN ("display-supports-face-attributes-p",
The optional argument DISPLAY can be a display name, a frame, or
nil (meaning the selected frame's display).
For instance, to check whether the display supports underlining:
(display-supports-face-attributes-p \\='(:underline t))
The definition of `supported' is somewhat heuristic, but basically means
that a face containing all the attributes in ATTRIBUTES, when merged
with the default face for display, can be represented in a way that's