Struct NestLimiter 

struct NestLimiter<'p, 's, P> {
    p: &'p ParserI<'s, P>,
    depth: u32,
}

A type that traverses a fully parsed Ast and checks whether its depth exceeds the specified nesting limit. If it does, then an error is returned.

Fields

p: &'p ParserI<'s, P>

The parser that is checking the nest limit.

depth: u32

The current depth while walking an Ast.

Implementations

impl<'p, 's, P: Borrow<Parser>> NestLimiter<'p, 's, P>

fn new(p: &'p ParserI<'s, P>) -> NestLimiter<'p, 's, P>

fn check(self, ast: &Ast) -> Result<(), Error>

fn increment_depth(&mut self, span: &Span) -> Result<(), Error>

fn decrement_depth(&mut self)

Trait Implementations

impl<'p, 's, P: Debug> Debug for NestLimiter<'p, 's, P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'p, 's, P: Borrow<Parser>> Visitor for NestLimiter<'p, 's, P>

type Output = ()

The result of visiting an AST.

type Err = Error

An error that visiting an AST might return.

fn finish(self) -> Result<(), Error>

All implementors of Visitor must provide a finish method, which yields the result of visiting the AST or an error.

fn visit_pre(&mut self, ast: &Ast) -> Result<(), Error>

This method is called on an Ast before descending into child Ast nodes.

fn visit_post(&mut self, ast: &Ast) -> Result<(), Error>

This method is called on an Ast after descending all of its child Ast nodes.

fn visit_class_set_item_pre(&mut self, ast: &ClassSetItem) -> Result<(), Error>

This method is called on every ClassSetItem before descending into child nodes.

fn visit_class_set_item_post(&mut self, ast: &ClassSetItem) -> Result<(), Error>

This method is called on every ClassSetItem after descending into child nodes.

fn visit_class_set_binary_op_pre( &mut self, ast: &ClassSetBinaryOp, ) -> Result<(), Error>

This method is called on every ClassSetBinaryOp before descending into child nodes.

fn visit_class_set_binary_op_post( &mut self, _ast: &ClassSetBinaryOp, ) -> Result<(), Error>

This method is called on every ClassSetBinaryOp after descending into child nodes.

fn start(&mut self)

This method is called before beginning traversal of the AST.

fn visit_alternation_in(&mut self) -> Result<(), Self::Err>

This method is called between child nodes of an Alternation.

fn visit_concat_in(&mut self) -> Result<(), Self::Err>

This method is called between child nodes of a concatenation.

fn visit_class_set_binary_op_in( &mut self, _ast: &ClassSetBinaryOp, ) -> Result<(), Self::Err>

This method is called between the left hand and right hand child nodes of a ClassSetBinaryOp.