Documentation

Lean.Meta.Iterator

structure Lean.Meta.Iterator (α : Type) :

Provides an interface for iterating over values that are bundled with the Meta state they are valid in.

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    Convert a list into an iterator with the current state.

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      Map and filter results of iterator and returning only those values returned by f.

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        Find the first value in the iterator while resetting state or call failure if empty.

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          def Lean.Meta.Iterator.firstM {α : Type} {β : Type} (L : Lean.Meta.Iterator α) (f : αLean.MetaM (Option β)) :

          Return the first value returned by the iterator that f succeeds on.

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