Method stack_try_push

crates/vm/src/frame.rs:312–321

(&mut self, val: Option<PyStackRef>)

    /// Try to push; returns Err if stack is full.
    #[inline(always)]
    fn stack_try_push(&mut self, val: Option<PyStackRef>) -> Result<(), Option<PyStackRef>> {
        let idx = self.nlocalsplus as usize + self.stack_top as usize;
        if idx >= self.capacity() {
            return Err(val);
        }
        let data = self.data_as_mut_slice();
        data[idx] = unsafe { core::mem::transmute::<Option<PyStackRef>, usize>(val) };
        self.stack_top += 1;
        Ok(())
    }

    /// Pop a value from the evaluation stack.
    #[inline(always)]