Struct scriptful::core::condition_stack::ConditionStack
source · [−]pub struct ConditionStack { /* private fields */ }
Expand description
A data type to abstract out the condition stack during script execution.
Conceptually it acts like a vector of booleans, one for each level of nested IF/THEN/ELSE, indicating whether we’re in the active or inactive branch of each.
The elements on the stack cannot be observed individually; we only need to expose whether the stack is empty and whether or not any false values are present at all. To implement OP_ELSE, a toggle_top modifier is added, which flips the last value without returning it.
This uses an optimized implementation that does not materialize the actual stack. Instead, it just stores the size of the would-be stack, and the position of the first false value in it.
Implementations
Trait Implementations
sourceimpl Debug for ConditionStack
impl Debug for ConditionStack
Auto Trait Implementations
impl RefUnwindSafe for ConditionStack
impl Send for ConditionStack
impl Sync for ConditionStack
impl Unpin for ConditionStack
impl UnwindSafe for ConditionStack
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more