Make __idiv metamethod available for luau

Closes #383

Author: khvzak

src/userdata.rs

@@ -54,8 +54,8 @@ pub enum MetaMethod {
     /// The unary minus (`-`) operator.
     Unm,
     /// The floor division (//) operator.
-    /// Requires `feature = "lua54/lua53"`
-    #[cfg(any(feature = "lua54", feature = "lua53"))]
+    /// Requires `feature = "lua54/lua53/luau"`
+    #[cfg(any(feature = "lua54", feature = "lua53", feature = "luau"))]
     IDiv,
     /// The bitwise AND (&) operator.
     /// Requires `feature = "lua54/lua53"`
@@ -180,7 +180,7 @@ impl MetaMethod {
             MetaMethod::Pow => "__pow",
             MetaMethod::Unm => "__unm",
 
-            #[cfg(any(feature = "lua54", feature = "lua53"))]
+            #[cfg(any(feature = "lua54", feature = "lua53", feature = "luau"))]
             MetaMethod::IDiv => "__idiv",
             #[cfg(any(feature = "lua54", feature = "lua53"))]
             MetaMethod::BAnd => "__band",

src/util/mod.rs

@@ -928,7 +928,7 @@ pub unsafe fn init_error_registry(state: *mut ffi::lua_State) -> Result<()> {
         "__mod",
         "__pow",
         "__unm",
-        #[cfg(any(feature = "lua54", feature = "lua53"))]
+        #[cfg(any(feature = "lua54", feature = "lua53", feature = "luau"))]
         "__idiv",
         #[cfg(any(feature = "lua54", feature = "lua53"))]
         "__band",