venndb/
lib.rs

1#![doc = include_str!("../README.md")]
2
3pub use venndb_macros::VennDB;
4
5/// A trait that types can implement in order to support `#[venndb(any)]` attribute filters.
6pub trait Any {
7    /// Returns true if the value is considered to be "any" within the context of the type.
8    ///
9    /// # Example
10    ///
11    /// ```
12    /// use venndb::Any;
13    ///
14    /// #[derive(Debug)]
15    /// struct MyString(String);
16    ///
17    /// impl Any for MyString {
18    ///    fn is_any(&self) -> bool {
19    ///       self.0 == "*"
20    ///   }
21    /// }
22    ///
23    /// let my_string = MyString("*".to_string());
24    /// assert!(my_string.is_any());
25    ///
26    /// let my_string = MyString("hello".to_string());
27    /// assert!(!my_string.is_any());
28    /// ```
29    fn is_any(&self) -> bool;
30}
31
32impl<T: Any> Any for &T {
33    fn is_any(&self) -> bool {
34        T::is_any(*self)
35    }
36}
37
38impl<T: Any> Any for Option<T> {
39    fn is_any(&self) -> bool {
40        match self {
41            Some(value) => value.is_any(),
42            None => false,
43        }
44    }
45}
46
47impl<T: Any> Any for std::sync::Arc<T> {
48    fn is_any(&self) -> bool {
49        T::is_any(&**self)
50    }
51}
52
53impl<T: Any> Any for std::rc::Rc<T> {
54    fn is_any(&self) -> bool {
55        T::is_any(&**self)
56    }
57}
58
59impl<T: Any> Any for Box<T> {
60    fn is_any(&self) -> bool {
61        T::is_any(&**self)
62    }
63}
64
65#[doc(hidden)]
66pub mod __internal {
67    //! Hidden thirdparty dependencies for venndb,
68    //! not to be relied upon directly, as they may change at any time.
69
70    pub use bitvec::{order::Lsb0, slice::IterOnes, vec::BitVec};
71    pub use hashbrown::HashMap;
72
73    /// Generate a random `usize`.
74    pub fn rand_usize() -> usize {
75        use rand::Rng;
76
77        rand::thread_rng().gen()
78    }
79
80    pub mod hash_map {
81        //! Internal types related to hash map.
82
83        pub use hashbrown::hash_map::Entry;
84    }
85}
venndb/lib.rs

venndb/
lib.rs
