Struct Expander 

pub struct Expander {
    pub budget_on: bool,
    pub expand_budget: u64,
    pub expand_fired: u64,
    /* private fields */
}

The macro table and the application counters: mMacros, mBudgetOn, mExpandBudget and mExpandFired.

Fields

budget_on: bool

L15: when on, applications beyond the budget do not fire.

expand_budget: u64

expand_fired: u64

L1: macro applications since the last reset.

Implementations

impl Expander

pub fn new() -> Expander

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

VBA GetMacro: by name, folded.

pub fn macro_doc(&self, name: &str) -> String

VBA VlaMacroDoc: a macro’s docstring, or empty.

pub fn define_macro(&mut self, f: &List) -> Result<(), Refusal>

VBA DefineMacro: (defmacro (name params... [& rest]) ["doc"] template...).

pub fn expand(&mut self, d: &Form, depth: u32) -> Result<Form, Refusal>

VBA ExpandMacros: a form to its fixpoint.

pub fn expand_one_pass(&mut self, d: &Form) -> Result<Form, Refusal>

VBA ExpandOnePass: top-down; a list whose head is a macro is replaced by its substitution and not walked further.

pub fn collect(&mut self, forms: Vec<Form>) -> Result<Vec<Form>, Refusal>

VlaTranspile’s and VlaExpandText’s pass 1 over the prelude and the source read together: every defmacro is defined, in order, and the other forms come back as the body.

Trait Implementations

impl Default for Expander

fn default() -> Expander

Returns the “default value” for a type.