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Mode docs on columns() vs mbstrlen()

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Dianne Skoll
2025-09-10 23:07:23 -04:00
parent df53db19c4
commit 641b5cec57
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7
man/remind.1.in
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@@ -3797,6 +3797,13 @@ ANSI color-changing sequences occupy zero columns whereas some Unicode
characters occupy two columns. \fBcolumns(str)\fR takes all of that
into account. Note that if \fBRemind\fR was compiled without Unicode support,
\fBcolumns(str)\fR returns a type mismatch error.
.PP
The result of \fBcolumns(str)\fR may be less than, equal to, or
greater than the result of \fBmbstrlen(str)\fR. This is because some
Unicode characters are so-called combining characters that add one to the
character length, but don't occupy any columns on their own. And other
Unicode characters are double-width characters that add one to the
character length, but two to the number of display columns.
.RE
.TP
.B const(x_arg)