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32 lines
707 B
Text
32 lines
707 B
Text
interface Task
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exposes [ Task, succeed, fail, after, map ]
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imports [ Effect.{ Effect } ]
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Task ok err : Effect (Result ok err)
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succeed : val -> Task val *
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succeed = \val ->
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Effect.always (Ok val)
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fail : err -> Task * err
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fail = \val ->
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Effect.always (Err val)
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after : Task a err, (a -> Task b err) -> Task b err
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after = \effect, transform ->
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Effect.after effect, \result ->
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when result is
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Ok a -> transform a
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Err err -> Task.fail err
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map : Task a err, (a -> b) -> Task b err
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map = \effect, transform ->
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Effect.after effect, \result ->
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when result is
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Ok a -> Task.succeed (transform a)
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Err err -> Task.fail err
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