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Add __call metamethod

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This commit is contained in:
Sofia 2026-03-21 14:56:06 +02:00
parent 875cfc1220
commit 71c11e87e5
1 changed files with 65 additions and 10 deletions
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75
src/vm/mod.rs
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@ -653,7 +653,9 @@ impl ClosureRunner {
"__index",
vec![value.unwrap().clone(), index_value.clone()],
) {
Ok(value) => StackValue::Value(value),
Ok(value) => {
StackValue::Value(value.first().unwrap().clone())
}
Err(_) => StackValue::Value(Value::Nil),
}
}
@ -773,7 +775,7 @@ impl ClosureRunner {
.get(func_reg)
.map(|v| v.borrow().clone())
.unwrap_or(Value::Nil);
match value {
match &value {
Value::RustFunction(func) => {
let ret_values = func.borrow_mut().execute(params)?;
if *ret_len != 0 {
@ -807,6 +809,34 @@ impl ClosureRunner {
}
self.inner = Some(Box::new(closure.run(params)));
}
Value::Table { metatable, .. } => {
let mut metamethod_params = vec![value.clone()];
metamethod_params.extend(params);
let ret_values =
self.call_metamethod(&metatable, "__call", metamethod_params)?;
if *ret_len != 0 {
for i in 0..=(*ret_len - 2) {
self.set_stack(
*func_reg + i,
StackValue::Value(
ret_values
.get(i as usize)
.cloned()
.unwrap_or(Value::Nil),
),
);
}
} else {
for (i, value) in ret_values.iter().enumerate() {
self.set_stack(
*func_reg + i as u16 + 1,
StackValue::Value(value.clone()),
);
}
self.top = *func_reg + ret_values.len() as u16;
}
}
_ => return Err(RuntimeError::TriedCallingNonFunction(value.clone())),
}
}
@ -1019,6 +1049,8 @@ impl ClosureRunner {
"__eq",
vec![lhs.clone(), rhs.clone()],
)?
.first()
.unwrap()
.is_truthy(),
))),
);
@ -1093,7 +1125,10 @@ impl ClosureRunner {
Value::Table { metatable, .. } => {
match self.call_metamethod(&metatable, "__len", vec![value.clone()]) {
Ok(result) => {
self.set_stack(*res, StackValue::Value(result));
self.set_stack(
*res,
StackValue::Value(result.first().unwrap().clone()),
);
}
Err(_) => {
self.set_stack(*res, StackValue::Value(value.len()?));
@ -1187,7 +1222,11 @@ impl ClosureRunner {
.borrow()
.contains_key(&IndexableValue::String(metamethod.to_owned()))
{
self.call_metamethod(metatable, metamethod, vec![param.clone()])
Ok(self
.call_metamethod(metatable, metamethod, vec![param.clone()])?
.into_iter()
.next()
.unwrap())
} else {
Err(RuntimeError::InvalidUnop(
metamethod.to_owned(),
@ -1218,14 +1257,26 @@ impl ClosureRunner {
.borrow()
.contains_key(&IndexableValue::String(metamethod.to_owned()))
{
self.call_metamethod(&metatable, metamethod, vec![lhs.clone(), rhs])
Ok(self
.call_metamethod(&metatable, metamethod, vec![lhs.clone(), rhs])?
.into_iter()
.next()
.unwrap())
} else {
if let Value::Table { metatable, .. } = &rhs {
if metatable
.borrow()
.contains_key(&IndexableValue::String(metamethod.to_owned()))
{
self.call_metamethod(&metatable, metamethod, vec![lhs, rhs.clone()])
Ok(self
.call_metamethod(
&metatable,
metamethod,
vec![lhs, rhs.clone()],
)?
.into_iter()
.next()
.unwrap())
} else {
Err(RuntimeError::InvalidBinop(
metamethod.to_owned(),
@ -1246,7 +1297,11 @@ impl ClosureRunner {
.borrow()
.contains_key(&IndexableValue::String(metamethod.to_owned()))
{
self.call_metamethod(&metatable, metamethod, vec![lhs, rhs.clone()])
Ok(self
.call_metamethod(&metatable, metamethod, vec![lhs, rhs.clone()])?
.into_iter()
.next()
.unwrap())
} else {
Err(RuntimeError::InvalidBinop(
metamethod.to_owned(),
@ -1270,7 +1325,7 @@ impl ClosureRunner {
metatable: &Table,
metamethod: &str,
params: Vec<Value>,
) -> Result<Value, RuntimeError> {
) -> Result<Vec<Value>, RuntimeError> {
if let Some(value) = metatable
.borrow()
.get(&IndexableValue::String(metamethod.to_owned()))
@ -1278,7 +1333,7 @@ impl ClosureRunner {
match value {
Value::RustFunction(function) => {
let result = function.borrow_mut().execute(params)?;
Ok(result.into_iter().next().unwrap())
Ok(result)
}
Value::Function(closure) => {
let mut runnable = closure.run(params);
@ -1288,7 +1343,7 @@ impl ClosureRunner {
return_value = runnable.next()?;
return_value.is_none()
} {}
Ok(return_value.unwrap().into_iter().next().unwrap())
Ok(return_value.unwrap())
}
_ => Err(RuntimeError::MetafunctionNotCallable(value.clone())),
}