Struct MacroExpander 

pub struct MacroExpander { /* private fields */ }

The macro expansion engine.

Maintains a registry of macro definitions and provides expansion services.

Implementations

impl MacroExpander

pub fn new() -> Self

Create a new macro expander.

pub fn set_max_depth(&mut self, depth: u32)

Set the maximum expansion depth.

pub fn fresh_scope(&mut self) -> u64

Generate a fresh scope id for hygiene.

pub fn register_macro(&mut self, def: MacroDef)

Register a macro definition.

pub fn unregister_macro(&mut self, name: &str) -> Option<MacroDef>

Unregister a macro by name.

pub fn has_macro(&self, name: &str) -> bool

Check whether a macro with the given name is registered.

pub fn get_macro(&self, name: &str) -> Option<&MacroDef>

Get a macro definition by name.

pub fn macro_count(&self) -> usize

Get the number of registered macros.

pub fn register_syntax(&mut self, def: SyntaxDef)

Register a syntax definition.

pub fn syntax_defs_for(&self, kind: &SyntaxKind) -> Vec<&SyntaxDef>

Get all syntax definitions for a given kind.

pub fn expand( &mut self, name: &str, input: &[Token], ) -> Result<Vec<Token>, MacroError>

Expand a macro invocation.

Looks up the macro by name, tries each rule in order, and returns the expanded token sequence on the first match.

pub fn macro_names(&self) -> Vec<&str>

List all registered macro names.

Trait Implementations

impl Default for MacroExpander

fn default() -> Self

Returns the “default value” for a type.