Function visit

regex/regex-syntax/src/ast/visitor.rs:129–131

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.Visitor.html) 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

(ast: &Ast, visitor: V)

/// If the visitor returns an error at any point, then visiting is stopped and
/// the error is returned.
pub fn visit<V: Visitor>(ast: &Ast, visitor: V) -> Result<V::Output, V::Err> {
    HeapVisitor::new().visit(ast, visitor)
}

/// HeapVisitor visits every item in an `Ast` recursively using constant stack
/// size and a heap size proportional to the size of the `Ast`.