diff options
| -rw-r--r-- | src/ir/context.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/ir/context.rs b/src/ir/context.rs index 07731dde..5ebcfc28 100644 --- a/src/ir/context.rs +++ b/src/ir/context.rs @@ -135,6 +135,25 @@ item_id_newtype! { unchecked = as_module_id_unchecked; } +item_id_newtype! { + /// An identifier for an `Item` whose `ItemKind` is known to be + /// `ItemKind::Var`. + pub struct VarId(ItemId) + where + /// Convert this `ItemId` into a `VarId` if its associated item is a var, + /// otherwise return `None`. + checked = as_var_id with is_var, + + /// Convert this `ItemId` into a `VarId`. + /// + /// If this `ItemId` does not point to a var, then panic. + expected = expect_var_id, + + /// Convert this `ItemId` into a `VarId` without actually checking whether + /// this id actually points to a `Var`. + unchecked = as_var_id_unchecked; +} + impl From<ItemId> for usize { fn from(id: ItemId) -> usize { id.0 |