Split {Idx, IndexVec, IndexSlice} into their own modules

compiler/rustc_data_structures/src/graph/dominators/mod.rs

@@ -10,7 +10,8 @@
 //! <https://www.cs.princeton.edu/courses/archive/spr03/cs423/download/dominators.pdf>
 
 use super::ControlFlowGraph;
-use rustc_index::vec::{Idx, IndexSlice, IndexVec};
+use rustc_index::{Idx, IndexSlice, IndexVec};
+
 use std::cmp::Ordering;
 
 #[cfg(test)]

compiler/rustc_data_structures/src/graph/iterate/mod.rs

@@ -1,6 +1,6 @@
 use super::{DirectedGraph, WithNumNodes, WithStartNode, WithSuccessors};
 use rustc_index::bit_set::BitSet;
-use rustc_index::vec::{IndexSlice, IndexVec};
+use rustc_index::{IndexSlice, IndexVec};
 use std::ops::ControlFlow;
 
 #[cfg(test)]

compiler/rustc_data_structures/src/graph/mod.rs

@@ -1,4 +1,4 @@
-use rustc_index::vec::Idx;
+use rustc_index::Idx;
 
 pub mod dominators;
 pub mod implementation;

compiler/rustc_data_structures/src/graph/scc/mod.rs

@@ -8,7 +8,7 @@
 use crate::fx::FxHashSet;
 use crate::graph::vec_graph::VecGraph;
 use crate::graph::{DirectedGraph, GraphSuccessors, WithNumEdges, WithNumNodes, WithSuccessors};
-use rustc_index::vec::{Idx, IndexSlice, IndexVec};
+use rustc_index::{Idx, IndexSlice, IndexVec};
 use std::ops::Range;
 
 #[cfg(test)]

compiler/rustc_data_structures/src/graph/vec_graph/mod.rs

@@ -1,5 +1,5 @@
 use crate::graph::{DirectedGraph, GraphSuccessors, WithNumEdges, WithNumNodes, WithSuccessors};
-use rustc_index::vec::{Idx, IndexVec};
+use rustc_index::{Idx, IndexVec};
 
 #[cfg(test)]
 mod tests;