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Even more concise

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greg 2017-12-10 19:01:44 -08:00
parent 8493233b69
commit d11500c643
1 changed files with 7 additions and 11 deletions
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18
src/rukka_lang/mod.rs
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@ -82,17 +82,13 @@ impl EvaluatorState {
expr @ NumberAtom(_) => expr, expr @ NumberAtom(_) => expr,
True => True, True => True,
False => False, False => False,
Cons(box operator, box operands) => { Cons(box operator, box operands) => match operator {
match operator { SymbolAtom(ref sym) if match &sym[..] {
SymbolAtom(sym) => match &sym[..] { "quote" | "eq?" | "cons" | "car" | "cdr" | "atom?" | "define" | "lambda" | "if" | "cond" => true, _ => false
"quote" | "eq?" | "cons" | "car" | "cdr" | "atom?" | } => self.eval_special_form(sym, operands)?,
"define" | "lambda" | "if" | "cond" => self.eval_special_form(&sym[..], operands)?, _ => {
_ => { let evaled = self.eval(operator)?;
let evaled = self.eval(SymbolAtom(sym))?; self.apply(evaled, operands)?
self.apply(evaled, operands)?
}
},
_ => unimplemented!()
} }
}, },
Nil => Nil, Nil => Nil,