user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Move the option type to its own module

Browse source
This commit is contained in:
Patrick Walton 2010-11-03 17:10:37 -07:00
parent e399926776
commit adb1754e4d
14 changed files with 115 additions and 93 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/lib/util.rs
View file

@ -1,21 +1,3 @@
tag option[T] {
none;
some(T);
}
type operator[T, U] = fn(&T) -> U;
fn option_map[T, U](&operator[T, U] f, &option[T] opt) -> option[U] {
alt (opt) {
case (some[T](?x)) {
ret some[U](f(x));
}
case (none[T]) {
ret none[U];
}
}
}
fn id[T](&T x) -> T {
ret x;
}