{"defs":[{"ctors":[{"fields":[],"name":"Nothing"},{"fields":[{"k":"var","name":"a"}],"name":"Just"}],"doc":"Polymorphic optional value: either Just or Nothing.","kind":"type","name":"Maybe","vars":["a"]},{"body":{"arms":[{"body":{"name":"x","t":"var"},"pat":{"ctor":"Just","fields":[{"name":"x","p":"var"}],"p":"ctor"}},{"body":{"name":"default","t":"var"},"pat":{"ctor":"Nothing","fields":[],"p":"ctor"}}],"scrutinee":{"name":"m","t":"var"},"t":"match"},"doc":"Project out of Maybe with a default for the Nothing case.","kind":"fn","name":"from_maybe","params":["default","m"],"type":{"body":{"effects":[],"k":"fn","params":[{"k":"var","name":"a"},{"args":[{"k":"var","name":"a"}],"k":"con","name":"Maybe"}],"ret":{"k":"var","name":"a"}},"k":"forall","vars":["a"]}},{"body":{"arms":[{"body":{"lit":{"kind":"bool","value":true},"t":"lit"},"pat":{"ctor":"Just","fields":[{"p":"wild"}],"p":"ctor"}},{"body":{"lit":{"kind":"bool","value":false},"t":"lit"},"pat":{"ctor":"Nothing","fields":[],"p":"ctor"}}],"scrutinee":{"name":"m","t":"var"},"t":"match"},"doc":"Returns true iff m is Just<_>.","kind":"fn","name":"is_some","params":["m"],"type":{"body":{"effects":[],"k":"fn","params":[{"args":[{"k":"var","name":"a"}],"k":"con","name":"Maybe"}],"ret":{"k":"con","name":"Bool"}},"k":"forall","vars":["a"]}},{"body":{"arms":[{"body":{"lit":{"kind":"bool","value":false},"t":"lit"},"pat":{"ctor":"Just","fields":[{"p":"wild"}],"p":"ctor"}},{"body":{"lit":{"kind":"bool","value":true},"t":"lit"},"pat":{"ctor":"Nothing","fields":[],"p":"ctor"}}],"scrutinee":{"name":"m","t":"var"},"t":"match"},"doc":"Returns true iff m is Nothing.","kind":"fn","name":"is_none","params":["m"],"type":{"body":{"effects":[],"k":"fn","params":[{"args":[{"k":"var","name":"a"}],"k":"con","name":"Maybe"}],"ret":{"k":"con","name":"Bool"}},"k":"forall","vars":["a"]}},{"body":{"arms":[{"body":{"args":[{"args":[{"name":"x","t":"var"}],"fn":{"name":"f","t":"var"},"t":"app"}],"ctor":"Just","t":"ctor","type":"Maybe"},"pat":{"ctor":"Just","fields":[{"name":"x","p":"var"}],"p":"ctor"}},{"body":{"args":[],"ctor":"Nothing","t":"ctor","type":"Maybe"},"pat":{"ctor":"Nothing","fields":[],"p":"ctor"}}],"scrutinee":{"name":"m","t":"var"},"t":"match"},"doc":"Apply f to the wrapped value, or pass Nothing through.","kind":"fn","name":"map_maybe","params":["f","m"],"type":{"body":{"effects":[],"k":"fn","params":[{"effects":[],"k":"fn","params":[{"k":"var","name":"a"}],"ret":{"k":"var","name":"b"}},{"args":[{"k":"var","name":"a"}],"k":"con","name":"Maybe"}],"ret":{"args":[{"k":"var","name":"b"}],"k":"con","name":"Maybe"}},"k":"forall","vars":["a","b"]}}],"imports":[],"name":"std_maybe","schema":"ailang/v0"}