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use crate::TreeBuilder;
pub struct ScopedBranch {
state: Option<TreeBuilder>,
}
impl ScopedBranch {
pub fn new(state: TreeBuilder) -> ScopedBranch {
state.enter();
ScopedBranch { state: Some(state) }
}
pub fn none() -> ScopedBranch {
ScopedBranch { state: None }
}
pub fn release(&mut self) {
if let Some(x) = &self.state {
x.exit();
}
self.state = None;
}
}
impl Drop for ScopedBranch {
fn drop(&mut self) {
self.release();
}
}