pub fn visit<V: Visitor>(ast: &Ast, visitor: V) -> Result<V::Output, V::Err>Expand description
Executes an implementation of Visitor in constant stack space.
This function will visit every node in the given Ast while calling the
appropriate methods provided by the Visitor trait.
The primary use case for this method is when one wants to perform case
analysis over an Ast without using a stack size proportional to the depth
of the Ast. Namely, this method will instead use constant stack size, but
will use heap space proportional to the size of the Ast. This may be
desirable in cases where the size of Ast is proportional to end user
input.
If the visitor returns an error at any point, then visiting is stopped and the error is returned.