Struct Grammar 

pub struct Grammar { /* private fields */ }

The rule table read out of the embedded grammar text (see grammar_text).

Implementations

impl Grammar

pub fn load() -> Grammar

Read the embedded css-grammar.jsonic.

Panics

If the embedded text is malformed. That is a build-time defect in this crate, not anything a caller can provoke, and tests/grammar.rs fails the build before it can ship.

pub fn parse(text: &str) -> Result<Grammar, String>

Read a grammar document in the jsonic subset described above.

A key this reader does not implement is an ERROR, at every level. The canonical ports hand the whole document to an engine that understands the full jsonic grammar surface; this port implements the part css-grammar.jsonic uses, and the two can only stay in step if the grammar growing a field the machine does not run stops the build. Ignoring it would leave the Rust port parsing a DIFFERENT grammar from the one the other two runtimes run, with every suite green.

pub fn rule(&self, name: &str) -> Option<&RuleDef>

The rule named name, if the grammar defines one.

pub fn len(&self) -> usize

How many rules the grammar defines.

pub fn is_empty(&self) -> bool

Whether the grammar defines no rules at all.

pub fn names(&self) -> impl Iterator<Item = &str>

The rule names, unordered.

Trait Implementations

impl Clone for Grammar

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Grammar

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

Formats the value using the given formatter.

impl Default for Grammar

fn default() -> Self

Returns the “default value” for a type.