Struct GrammarComposer 

pub struct GrammarComposer { /* private fields */ }

Manages dynamic composition of Pest grammars with extensions

Implementations

impl GrammarComposer

pub fn new() -> GrammarComposer

Create a new grammar composer with the base grammar

pub fn register_extension<T>(&mut self, extension: T) -> Result<(), ParseError>

where T: GrammarExtension + 'static,

Register an extension with the grammar composer.

Errors

Returns an error if there’s a priority conflict with an existing extension.

pub fn compose(&mut self) -> Result<String, GrammarCompositionError>

Compose the final grammar including all registered extensions

pub fn has_extension_rule(&self, rule_name: &str) -> bool

Check if an extension rule exists

pub fn extension_count(&self) -> usize

Get the number of registered extensions

pub fn write_composed_grammar<P>( &mut self, path: P, ) -> Result<(), GrammarCompositionError>

where P: AsRef<Path>,

Write the composed grammar to a file for debugging

Trait Implementations

impl Default for GrammarComposer

fn default() -> GrammarComposer

Returns the “default value” for a type.