Function join

aiscript-vm/src/builtins/string.rs:279–321

(
    mc: &'gc Mutation<'gc>,
    receiver: Value<'gc>,
    args: Vec<Value<'gc>>,
)

}

fn join<'gc>(
    mc: &'gc Mutation<'gc>,
    receiver: Value<'gc>,
    args: Vec<Value<'gc>>,
) -> Result<Value<'gc>, VmError> {
    let receiver = receiver.as_string_value()?;
    let separator = receiver.as_str();

    if args.len() != 1 {
        return Err(VmError::RuntimeError(
            "join: expected exactly one array argument".into(),
        ));
    }

    // Get the array from args[0]
    let vec = match &args[0] {
        Value::List(list) => &list.borrow().data,
        _ => {
            return Err(VmError::RuntimeError(
                "join: argument must be an array".into(),
            ));
        }
    };

    let mut result = String::new();
    for (i, value) in vec.iter().enumerate() {
        if i > 0 {
            result.push_str(separator);
        }
        match value {
            Value::String(s) => result.push_str(s.to_str().unwrap()),
            Value::IoString(s) => result.push_str(s),
            _ => {
                return Err(VmError::RuntimeError(format!(
                    "join: array element {} must be a string",
                    i
                )));
            }
        }
    }

    Ok(Value::IoString(Gc::new(mc, result)))
}

// Regex operations
fn regex_match<'gc>(