a5dc684eee
Store the types of `ty::Expr` arguments in the `ty::Expr` Part of #125958 In attempting to remove the `ty` field on `Const` it will become necessary to store the `Ty<'tcx>` inside of `Expr<'tcx>`. In order to do this without blowing up the size of `ConstKind`, we start storing the type/const args as `GenericArgs` r? `@oli-obk`
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