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| author | Ben Blum <bblum@andrew.cmu.edu> | 2012-07-24 15:46:40 -0400 |
|---|---|---|
| committer | Ben Blum <bblum@andrew.cmu.edu> | 2012-07-24 17:27:34 -0400 |
| commit | be3a71a1aa36173ce2cd521f811d8010029aa46f (patch) | |
| tree | df6cf34370c9b2caaedbc041fbb925f554389be6 /src/libcore/option.rs | |
| parent | 160ffb0c2fdb009af7d4a76181129b4d12b8f2e7 (diff) | |
Add option::unwrap_expect
Diffstat (limited to 'src/libcore/option.rs')
| -rw-r--r-- | src/libcore/option.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libcore/option.rs b/src/libcore/option.rs index 6cfb18dc644..270ba90c704 100644 --- a/src/libcore/option.rs +++ b/src/libcore/option.rs @@ -120,6 +120,12 @@ pure fn unwrap<T>(-opt: option<T>) -> T { } } +pure fn unwrap_expect<T>(-opt: option<T>, reason: ~str) -> T { + //! As unwrap, but with a specified failure message. + if opt.is_none() { fail reason; } + unwrap(opt) +} + impl extensions<T> for option<T> { /** * Update an optional value by optionally running its content through a |