support any in fuzzing + bugfix ref issue

fuzz/fuzz_targets/fuzz_employee_db.rs

@@ -2,7 +2,7 @@
 
 use libfuzzer_sys::arbitrary::{self, Arbitrary};
 use libfuzzer_sys::fuzz_target;
-use venndb::VennDB;
+use venndb::{Any, VennDB};
 
 #[derive(Clone, Debug, Arbitrary, VennDB)]
 pub struct Employee {
@@ -13,7 +13,7 @@ pub struct Employee {
     alive: Option<bool>,
     #[venndb(filter)]
     faction: Faction,
-    #[venndb(filter)]
+    #[venndb(filter, any)]
     planet: Option<Planet>,
 }
 
@@ -25,10 +25,17 @@ pub enum Faction {
 
 #[derive(Clone, Debug, Arbitrary, PartialEq, Eq, Hash)]
 pub enum Planet {
+    Any,
     Earth,
     Mars,
 }
 
+impl Any for Planet {
+    fn is_any(&self) -> bool {
+        self == &Planet::Any
+    }
+}
+
 fuzz_target!(|rows: Vec<Employee>| {
     let _ = EmployeeDB::from_rows(rows);
 });

src/lib.rs

@@ -29,6 +29,39 @@ pub trait Any {
     fn is_any(&self) -> bool;
 }
 
+impl<T: Any> Any for &T {
+    fn is_any(&self) -> bool {
+        T::is_any(*self)
+    }
+}
+
+impl<T: Any> Any for Option<T> {
+    fn is_any(&self) -> bool {
+        match self {
+            Some(value) => value.is_any(),
+            None => false,
+        }
+    }
+}
+
+impl<T: Any> Any for std::sync::Arc<T> {
+    fn is_any(&self) -> bool {
+        T::is_any(&**self)
+    }
+}
+
+impl<T: Any> Any for std::rc::Rc<T> {
+    fn is_any(&self) -> bool {
+        T::is_any(&**self)
+    }
+}
+
+impl<T: Any> Any for Box<T> {
+    fn is_any(&self) -> bool {
+        T::is_any(&**self)
+    }
+}
+
 #[doc(hidden)]
 pub mod __internal {
     //! Hidden thirdparty dependencies for venndb,

venndb-macros/src/generate_db.rs

@@ -418,7 +418,7 @@ fn generate_db_struct_method_append(
                 };
                 let is_any_value = if field.optional {
                     quote! {
-                        data.#name.map(|v| ::venndb::Any::is_any(&v)).unwrap_or_default()
+                        data.#name.as_ref().map(|v| ::venndb::Any::is_any(v)).unwrap_or_default()
                     }
                 } else {
                     quote! {
@@ -761,7 +761,7 @@ fn generate_query_struct_impl(
                 let value_filter = match field.filter_any_name() {
                     Some(name) => {
                         quote! {
-                            if ::venndb::Any::is_any(value) {
+                            if ::venndb::Any::is_any(&value) {
                                 filter &= &self.db.#name;
                             } else {
                                 #value_filter

venndb-usage/tests/fails/any_filter_no_trait_impl.stderr

@@ -4,4 +4,25 @@ error[E0277]: the trait bound `Department: venndb::Any` is not satisfied
 3 | #[derive(Debug, VennDB)]
   |                 ^^^^^^ the trait `venndb::Any` is not implemented for `Department`
   |
+  = help: the following other types implement trait `venndb::Any`:
+            Box<T>
+            Rc<T>
+            Arc<T>
+            Option<T>
+            &T
+  = note: this error originates in the derive macro `VennDB` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0277]: the trait bound `Department: venndb::Any` is not satisfied
+ --> tests/fails/any_filter_no_trait_impl.rs:3:17
+  |
+3 | #[derive(Debug, VennDB)]
+  |                 ^^^^^^ the trait `venndb::Any` is not implemented for `Department`, which is required by `&Department: venndb::Any`
+  |
+  = help: the following other types implement trait `venndb::Any`:
+            Box<T>
+            Rc<T>
+            Arc<T>
+            Option<T>
+            &T
+  = note: required for `&Department` to implement `venndb::Any`
   = note: this error originates in the derive macro `VennDB` (in Nightly builds, run with -Z macro-backtrace for more info)