Struct cstree::NodeCache

pub struct NodeCache<'i, I = TokenInterner> { /* fields omitted */ }

A NodeCache deduplicates identical tokens and small nodes during tree construction. You can re-use the same cache for multiple similar trees with GreenNodeBuilder::with_cache.

Implementations

impl NodeCache<'static>

pub fn new() -> Self

Constructs a new, empty cache.

By default, this will also create a default interner to deduplicate source text (strings) across tokens. To re-use an existing interner, see with_interner.

Examples

let mut cache = NodeCache::new();
let mut builder = GreenNodeBuilder::with_cache(&mut cache);
parse(&mut builder, "42");
let (tree, _) = builder.finish();
assert_eq!(tree.kind(), ROOT);
let int = tree.children().next().unwrap();
assert_eq!(int.kind(), INT);

impl<'i, I> NodeCache<'i, I> where
    I: Interner, 

pub fn with_interner(interner: &'i mut I) -> Self

Constructs a new, empty cache that will use the given interner to deduplicate source text (strings) across tokens.

Examples

use lasso::Rodeo;
let mut interner = Rodeo::new();
let mut cache = NodeCache::with_interner(&mut interner);
let mut builder = GreenNodeBuilder::with_cache(&mut cache);
parse(&mut builder, "42");
let (tree, _) = builder.finish();
assert_eq!(tree.kind(), ROOT);
let int = tree.children().next().unwrap();
assert_eq!(int.kind(), INT);

Trait Implementations

impl<'i, I: Debug> Debug for NodeCache<'i, I>

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

Formats the value using the given formatter.

impl Default for NodeCache<'static>

fn default() -> Self

Returns the “default value” for a type.