diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/option.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/lib/option.rs b/src/lib/option.rs index 561456799f4..30066f4e196 100644 --- a/src/lib/option.rs +++ b/src/lib/option.rs @@ -21,6 +21,10 @@ fn is_none[T](&t[T] opt) -> bool { ret alt (opt) { case (none) { true } case (some(_)) { false } }; } +fn is_some[T](&t[T] opt) -> bool { + ret !is_none(opt); +} + fn from_maybe[T](&T def, &t[T] opt) -> T { auto f = bind util::id[T](_); ret maybe[T, T](def, f, opt); |