bjoernager/rust
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Remove out-of-date comments.

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These refer to code that no longer exists.
This commit is contained in:
Nicholas Nethercote 2019-09-16 12:38:24 +10:00
parent 1936e44c13
commit 3fda9578e0
1 changed files with 0 additions and 16 deletions
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16
src/librustc_data_structures/obligation_forest/mod.rs
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@ -61,14 +61,6 @@
//! results. This is used by the `FulfillmentContext` to decide when it
//! has reached a steady state.
//!
//! #### Snapshots
//!
//! The `ObligationForest` supports a limited form of snapshots; see
//! `start_snapshot`, `commit_snapshot`, and `rollback_snapshot`. In
//! particular, you can use a snapshot to roll back new root
//! obligations. However, it is an error to attempt to
//! `process_obligations` during a snapshot.
//!
//! ### Implementation details
//!
//! For the most part, comments specific to the implementation are in the
@ -151,10 +143,6 @@ pub struct ObligationForest<O: ForestObligation> {
/// At the end of processing, those nodes will be removed by a
/// call to `compress`.
///
/// At all times we maintain the invariant that every node appears
/// at a higher index than its parent. This is needed by the
/// backtrace iterator (which uses `split_at`).
///
/// Ideally, this would be an `IndexVec<NodeIndex, Node<O>>`. But that is
/// slower, because this vector is accessed so often that the
/// `u32`-to-`usize` conversions required for accesses are significant.
@ -288,8 +276,6 @@ impl<O: ForestObligation> ObligationForest<O> {
}
/// Registers an obligation.
///
/// This CAN be done in a snapshot
pub fn register_obligation(&mut self, obligation: O) {
// Ignore errors here - there is no guarantee of success.
let _ = self.register_obligation_at(obligation, None);
@ -355,8 +341,6 @@ impl<O: ForestObligation> ObligationForest<O> {
}
/// Converts all remaining obligations to the given error.
///
/// This cannot be done during a snapshot.
pub fn to_errors<E: Clone>(&mut self, error: E) -> Vec<Error<O, E>> {
let mut errors = vec![];
for i in 0..self.nodes.len() {