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This commit is contained in:
Andrew Morris
2022-05-22 12:03:02 +10:00
parent d2873abda9
commit f48b7abb5f
2 changed files with 23 additions and 2 deletions
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20
src/vstc/virtual_machine/vs_array.rs
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@@ -567,8 +567,24 @@ static REDUCE_RIGHT: NativeFunction = NativeFunction {
static REVERSE: NativeFunction = NativeFunction {
fn_: |this: &mut Val, _params: Vec<Val>| -> Val {
match this {
Val::Array(_array_data) => {
std::panic!("Not implemented: REVERSE");
Val::Array(array_data) => {
if array_data.elements.len() == 0 {
// Treating this as an edge case because rust protects us from
// underflow when computing last below.
return this.clone();
}
let array_data_mut = Rc::make_mut(array_data);
let last = array_data_mut.elements.len() - 1;
for i in 0..(array_data_mut.elements.len() / 2) {
let tmp = array_data_mut.elements[i].clone();
array_data_mut.elements[i] = array_data_mut.elements[last - i].clone();
array_data_mut.elements[last - i] = tmp;
}
return this.clone();
},
_ => std::panic!("Not implemented: exceptions/array indirection"),
};