Struct TokenLookup 

pub struct TokenLookup<'a> { /* private fields */ }

A frame’s view of the tokens a lowering can reference: the running origin’s table over the host’s, and the roles in front of both. Borrowed from the core for the length of a lowering (crate::Core::token_lookup).

Implementations

impl<'a> TokenLookup<'a>

pub fn resolve(&self, name: &str) -> Option<TokenRef>

What a name resolves to: a role under either spelling, then the running origin’s table, then the host’s.

pub fn color(&self, name: &str) -> Result<Color, TokenError>

The colour a name resolves to this frame.

pub fn length(&self, name: &str) -> Result<f32, TokenError>

The length a name resolves to this frame.

pub fn color_at(&self, index: u32) -> Option<Color>

A colour by wire index (TokenRef::index): a role below COLOR_ROLES, the running origin’s table above. None past the end — a reference to a token the table no longer holds.

pub fn length_at(&self, index: u32) -> Option<f32>

A length by wire index, the same way over LENGTH_ROLES.

pub fn colors(&self) -> Vec<(&'a str, Color)>

Every colour token a reader in this origin sees, resolved for the frame: the running origin’s over the host’s, by name, in the host’s order then the guest’s additions. Roles are not listed — they are the theme’s reading.

pub fn lengths(&self) -> Vec<(&'a str, f32)>

The same for lengths.

pub fn color_names(&self, c: Color) -> Vec<&'a str>

The names a colour paints under this frame, for an inspector printing a value: every token (own over host) whose resolved colour is c. Two names with one value are both listed.

pub fn length_names(&self, v: f32) -> Vec<&'a str>

The same for a length.

Trait Implementations

impl<'a> Clone for TokenLookup<'a>

fn clone(&self) -> TokenLookup<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for TokenLookup<'a>