More documentation for alt expressions

2011-10-28 16:01:34 -07:00 · 2011-10-28 16:01:34 -07:00 · ba1df0eda9
commit ba1df0eda9
parent fd095fbfa6
1 changed files with 11 additions and 0 deletions
--- a/doc/rust.texi
+++ b/doc/rust.texi
@ -3402,6 +3402,17 @@ alt x @{
@}
@end example

+Multiple alternative patterns may be joined with the @code{|} operator.  A
+range of values may be specified with @code{to}.  For example:
+
+@example
+let message = alt x @{
+  0 | 1  @{ "not many" @}
+  2 to 9 @{ "a few" @}
+  _      @{ "lots" @}
+@}
+@end example
+

@node          Ref.Expr.Alt.Type
@subsubsection Ref.Expr.Alt.Type