Struct SourceMapCache 

pub struct SourceMapCache {
    pub cache: HashMap<(usize, usize), (usize, usize)>,
}

A cache for source map lookups.

Fields

cache: HashMap<(usize, usize), (usize, usize)>

Cached lookups: (line, col) -> (orig_line, orig_col)

Implementations

impl SourceMapCache

pub fn new() -> Self

Create a new empty cache.

pub fn insert( &mut self, gen_line: usize, gen_col: usize, orig_line: usize, orig_col: usize, )

Insert a cached mapping.

pub fn lookup(&self, gen_line: usize, gen_col: usize) -> Option<(usize, usize)>

Look up a cached mapping.

pub fn len(&self) -> usize

Returns the number of cached entries.

pub fn is_empty(&self) -> bool

Returns true if empty.

Trait Implementations

impl Default for SourceMapCache

fn default() -> Self

Returns the “default value” for a type.