Struct Checkpoint 

pub struct Checkpoint { /* private fields */ }

A saved cursor position, taken by Parser::checkpoint and restored by Parser::rewind.

A checkpoint captures both the cursor and the number of diagnostics recorded so far, so rewinding to it un-does a speculative parse completely — the cursor moves back and any errors recorded since are dropped. It is Copy, so taking one is free and it can be kept in a local.

Trait Implementations

impl Clone for Checkpoint

fn clone(&self) -> Checkpoint

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Checkpoint

impl Debug for Checkpoint

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

Formats the value using the given formatter.

impl Eq for Checkpoint

impl PartialEq for Checkpoint

fn eq(&self, other: &Checkpoint) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Checkpoint