compiler/rustc_middle/src/mir/abstract_const.rs

   1 //! A subset of a mir body used for const evaluatability checking.
   2 use crate::mir;
   3 use crate::ty;
   4
   5 rustc_index::newtype_index! {
   6     /// An index into an `AbstractConst`.
   7     pub struct NodeId {
   8         derive [HashStable]
   9         DEBUG_FORMAT = "n{}",
  10     }
  11 }
  12
  13 /// A node of an `AbstractConst`.
  14 #[derive(Debug, Clone, Copy, PartialEq, Eq, HashStable, TyEncodable, TyDecodable)]
  15 pub enum Node<'tcx> {
  16     Leaf(&'tcx ty::Const<'tcx>),
  17     Binop(mir::BinOp, NodeId, NodeId),
  18     UnaryOp(mir::UnOp, NodeId),
  19     FunctionCall(NodeId, &'tcx [NodeId]),
  20 }