New upstream version 1.66.0+dfsg1

[rustc.git] / compiler / rustc_typeck / src / check / generator_interior / drop_ranges / cfg_visualize.rs

diff --git a/compiler/rustc_typeck/src/check/generator_interior/drop_ranges/cfg_visualize.rs b/compiler/rustc_typeck/src/check/generator_interior/drop_ranges/cfg_visualize.rs
deleted file mode 100644 (file)
index c0a0bfe..0000000
--- a/compiler/rustc_typeck/src/check/generator_interior/drop_ranges/cfg_visualize.rs
+++ /dev/null
@@ -1,91 +0,0 @@
-//! Implementation of GraphWalk for DropRanges so we can visualize the control
-//! flow graph when needed for debugging.
-
-use rustc_graphviz as dot;
-use rustc_middle::ty::TyCtxt;
-
-use super::{DropRangesBuilder, PostOrderId};
-
-/// Writes the CFG for DropRangesBuilder to a .dot file for visualization.
-///
-/// It is not normally called, but is kept around to easily add debugging
-/// code when needed.
-pub(super) fn write_graph_to_file(
-    drop_ranges: &DropRangesBuilder,
-    filename: &str,
-    tcx: TyCtxt<'_>,
-) {
-    dot::render(
-        &DropRangesGraph { drop_ranges, tcx },
-        &mut std::fs::File::create(filename).unwrap(),
-    )
-    .unwrap();
-}
-
-struct DropRangesGraph<'a, 'tcx> {
-    drop_ranges: &'a DropRangesBuilder,
-    tcx: TyCtxt<'tcx>,
-}
-
-impl<'a> dot::GraphWalk<'a> for DropRangesGraph<'_, '_> {
-    type Node = PostOrderId;
-
-    type Edge = (PostOrderId, PostOrderId);
-
-    fn nodes(&'a self) -> dot::Nodes<'a, Self::Node> {
-        self.drop_ranges.nodes.iter_enumerated().map(|(i, _)| i).collect()
-    }
-
-    fn edges(&'a self) -> dot::Edges<'a, Self::Edge> {
-        self.drop_ranges
-            .nodes
-            .iter_enumerated()
-            .flat_map(|(i, node)| {
-                if node.successors.len() == 0 {
-                    vec![(i, i + 1)]
-                } else {
-                    node.successors.iter().map(move |&s| (i, s)).collect()
-                }
-            })
-            .collect()
-    }
-
-    fn source(&'a self, edge: &Self::Edge) -> Self::Node {
-        edge.0
-    }
-
-    fn target(&'a self, edge: &Self::Edge) -> Self::Node {
-        edge.1
-    }
-}
-
-impl<'a> dot::Labeller<'a> for DropRangesGraph<'_, '_> {
-    type Node = PostOrderId;
-
-    type Edge = (PostOrderId, PostOrderId);
-
-    fn graph_id(&'a self) -> dot::Id<'a> {
-        dot::Id::new("drop_ranges").unwrap()
-    }
-
-    fn node_id(&'a self, n: &Self::Node) -> dot::Id<'a> {
-        dot::Id::new(format!("id{}", n.index())).unwrap()
-    }
-
-    fn node_label(&'a self, n: &Self::Node) -> dot::LabelText<'a> {
-        dot::LabelText::LabelStr(
-            format!(
-                "{n:?}: {}",
-                self.drop_ranges
-                    .post_order_map
-                    .iter()
-                    .find(|(_hir_id, &post_order_id)| post_order_id == *n)
-                    .map_or("<unknown>".into(), |(hir_id, _)| self
-                        .tcx
-                        .hir()
-                        .node_to_string(*hir_id))
-            )
-            .into(),
-        )
-    }
-}