Rename WalkNegation to FilterAny.

This change renames `WalkNegation` and removes it from the public API in
favor of the `not` iterator combinator.

src/walk/glob.rs

@@ -195,13 +195,13 @@ struct Anchor {
 /// [`WalkEntry`]: crate::WalkEntry
 #[cfg_attr(docsrs, doc(cfg(feature = "walk")))]
 #[derive(Clone, Debug)]
-pub struct WalkNegation {
+pub struct FilterAny {
     exhaustive: Regex,
     nonexhaustive: Regex,
 }
 
-impl WalkNegation {
-    /// Combines glob expressions into a `WalkNegation`.
+impl FilterAny {
+    /// Combines glob expressions into a `FilterAny`.
     ///
     /// This function accepts an [`IntoIterator`] with items that implement [`Combine`], such as
     /// [`Glob`] and `&str`.
@@ -228,7 +228,7 @@ impl WalkNegation {
             .map_err(Into::into)?
             .into_iter()
             .partition::<Vec<_>, _>(|tree| token::is_exhaustive(tree.as_ref().tokens()));
-        let negation = WalkNegation {
+        let negation = FilterAny {
             exhaustive: crate::any(exhaustive)?.pattern,
             nonexhaustive: crate::any(nonexhaustive)?.pattern,
         };

src/walk/mod.rs

@@ -1,12 +1,12 @@
 #![cfg(feature = "walk")]
 
-// TODO: Are `cfg(feature = "walk")` attributes redundant on items defined within this module?
+// TODO: Are `doc(cfg(feature = "walk"))` attributes redundant on items defined within this module?
 
 mod filter;
 mod glob;
 mod tree;
 
-pub use crate::walk::glob::{GlobEntry, WalkGlob, WalkNegation};
+pub use crate::walk::glob::{GlobEntry, WalkGlob};
 pub use crate::walk::tree::{
     EntryResidue, FileIterator, FilterEntry, LinkBehavior, Not, WalkBehavior, WalkEntry, WalkError,
     WalkTree,

src/walk/tree.rs

@@ -8,7 +8,7 @@ use crate::walk::filter::{
     self, HierarchicalIterator, Isomeric, SeparatingFilter, SeparatingFilterInput, Separation,
     SkipTree, TreeResidue, WalkCancellation,
 };
-use crate::walk::glob::WalkNegation;
+use crate::walk::glob::FilterAny;
 use crate::{BuildError, Combine};
 
 pub type FileFiltrate<T> = Result<T, WalkError>;
@@ -384,10 +384,6 @@ impl SeparatingFilterInput for WalkTree {
     type Feed = (Result<WalkEntry, WalkError>, TreeResidue<WalkEntry>);
 }
 
-// TODO: This differing behavior is perhaps a bit more intuitive, but less flexible than
-//       `skip_current_dir`'s behavior. Crucially, `SkipTree` makes it extremely difficult to
-//       discard a directory in file tree based on its contents, such as some file with a name that
-//       indicates that a directory should be ignored, etc.
 impl SkipTree for WalkTree {
     fn skip_tree(&mut self) {
         // `IntoIter::skip_current_dir` discards the least recently yielded directory, but
@@ -543,9 +539,9 @@ pub trait FileIterator:
         I: IntoIterator,
         I::Item: Combine<'t>,
     {
-        WalkNegation::any(patterns).map(|negation| Not {
+        FilterAny::any(patterns).map(|filter| Not {
             input: self,
-            negation,
+            filter,
         })
     }
 }
@@ -558,7 +554,7 @@ where
 }
 
 // TODO: Implement this using combinators provided by the `filter` module and RPITIT once it lands
-// in stable Rust. Remove any use of `WalkCancellation::unchecked`.
+//       in stable Rust. Remove any use of `WalkCancellation::unchecked`.
 /// Iterator adaptor that filters [`WalkEntry`]s and controls the traversal of directory trees.
 ///
 /// This adaptor is returned by [`FileIterator::filter_tree`] and in addition to filtering
@@ -632,7 +628,7 @@ where
 #[derive(Clone, Debug)]
 pub struct Not<I> {
     input: I,
-    negation: WalkNegation,
+    filter: FilterAny,
 }
 
 impl<T, I> SeparatingFilter for Not<I>
@@ -650,7 +646,7 @@ where
                 Ok(separation) => separation
                     .filter_tree_by_substituent(
                         WalkCancellation::unchecked(&mut self.input),
-                        |substituent| self.negation.residue(substituent).map(From::from),
+                        |substituent| self.filter.residue(substituent).map(From::from),
                     )
                     .map_filtrate(Ok),
                 Err(error) => error.map(Err).into(),