pub struct ScopeIndex { /* private fields */ }
Expand description

An indexed structure of scopes that allows quick lookup by byte offset.

Construction of the index will validate that the scopes are well nested and parents fully contain their children. A list of scopes that are not well nested will result in an Err on construction.

Examples

use js_source_scopes::{ScopeIndex, ScopeLookupResult};

let scopes = vec![
    (5..25, Some(String::from("parent"))),
    (10..15, Some(String::from("child"))),
    (20..25, Some(String::from("child2"))),
    (30..50, None),
];

let idx = ScopeIndex::new(scopes).unwrap();
assert_eq!(idx.lookup(3), ScopeLookupResult::Unknown);
assert_eq!(idx.lookup(12), ScopeLookupResult::NamedScope("child"));
assert_eq!(idx.lookup(40), ScopeLookupResult::AnonymousScope);

Implementations§

Creates a new Scope index from the given list of Scopes.

Looks up the scope corresponding to the given offset.

Returns an iterator over the scopes in this index and their starting offsets.

Scopes are returned in order of their starting offsets.

Trait Implementations§

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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