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implemented subtraction for built-in functios

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Erin 2022-02-13 00:25:56 +01:00 committed by ondra05
parent d634692f12
commit 3338ec94c2
1 changed files with 21 additions and 1 deletions
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22
ablescript/src/variables.rs
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@ -635,7 +635,27 @@ impl ops::Sub for Value {
)
.into_functio(),
},
Functio::Builtin(_) => todo!(),
Functio::Builtin(b) => {
let arity = b.arity;
let resulting_arity = arity.saturating_sub(rhs.into_i32() as usize);
Functio::Builtin(BuiltinFunctio::new(
move |args| {
b.call(
&args
.iter()
.cloned()
.take(resulting_arity)
.chain(std::iter::repeat_with(|| {
Rc::new(RefCell::new(Value::Nul))
}))
.take(arity)
.collect::<Vec<_>>(),
)
},
resulting_arity,
))
}
Functio::Chain { functios, .. } => {
let rhs = rhs.into_functio();
let (a, b) = *functios;