yeet ConstInferUnifier

compiler/rustc_middle/src/ty/mod.rs

@@ -1070,6 +1070,24 @@ impl ParamTerm {
     }
 }
 
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum TermVid<'tcx> {
+    Ty(ty::TyVid),
+    Const(ty::ConstVid<'tcx>),
+}
+
+impl From<ty::TyVid> for TermVid<'_> {
+    fn from(value: ty::TyVid) -> Self {
+        TermVid::Ty(value)
+    }
+}
+
+impl<'tcx> From<ty::ConstVid<'tcx>> for TermVid<'tcx> {
+    fn from(value: ty::ConstVid<'tcx>) -> Self {
+        TermVid::Const(value)
+    }
+}
+
 /// This kind of predicate has no *direct* correspondent in the
 /// syntax, but it roughly corresponds to the syntactic forms:
 ///