Fix feature flags

src/internal.rs

@@ -12,10 +12,7 @@ pub use ctor;
 #[cfg(feature = "functions")]
 pub use specta_macros::fn_datatype;
 
-use crate::{
-    functions::{FunctionDataType, SpectaFunction},
-    DataType, DeprecatedType, Field, SpectaID, Type, TypeMap,
-};
+use crate::{DataType, DeprecatedType, Field, SpectaID, Type, TypeMap};
 
 /// Functions used to construct `crate::datatype` types (they have private fields so can't be constructed directly).
 /// We intentionally keep their fields private so we can modify them without a major version bump.
@@ -221,26 +218,34 @@ pub fn flatten<T: Type>(sid: SpectaID, type_map: &mut TypeMap, generics: &[DataT
     ty
 }
 
-#[doc(hidden)]
-/// A helper for exporting a command to a [`CommandDataType`].
-/// You shouldn't use this directly and instead should use [`fn_datatype!`](crate::fn_datatype).
-pub fn get_fn_datatype<TMarker, T: SpectaFunction<TMarker>>(
-    _: T,
-    asyncness: bool,
-    name: Cow<'static, str>,
-    type_map: &mut TypeMap,
-    fields: &[Cow<'static, str>],
-    docs: Cow<'static, str>,
-    deprecated: Option<DeprecatedType>,
-    no_return_type: bool,
-) -> FunctionDataType {
-    T::to_datatype(
-        asyncness,
-        name,
-        type_map,
-        fields,
-        docs,
-        deprecated,
-        no_return_type,
-    )
+#[cfg(feature = "functions")]
+mod functions {
+    use super::*;
+    use crate::functions::{FunctionDataType, SpectaFunction};
+
+    #[doc(hidden)]
+    /// A helper for exporting a command to a [`CommandDataType`].
+    /// You shouldn't use this directly and instead should use [`fn_datatype!`](crate::fn_datatype).
+    pub fn get_fn_datatype<TMarker, T: SpectaFunction<TMarker>>(
+        _: T,
+        asyncness: bool,
+        name: Cow<'static, str>,
+        type_map: &mut TypeMap,
+        fields: &[Cow<'static, str>],
+        docs: Cow<'static, str>,
+        deprecated: Option<DeprecatedType>,
+        no_return_type: bool,
+    ) -> FunctionDataType {
+        T::to_datatype(
+            asyncness,
+            name,
+            type_map,
+            fields,
+            docs,
+            deprecated,
+            no_return_type,
+        )
+    }
 }
+#[cfg(feature = "functions")]
+pub use functions::*;