Trait zvariant::Type

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pub trait Type {
    // Required method
    fn signature() -> Signature<'static>;
}
Expand description

Trait implemented by all serializable types.

This very simple trait provides the signature for the implementing type. Since the D-Bus type system relies on these signatures, our serialization and deserialization API requires this trait in addition to Serialize and Deserialize, respectively.

Implementation is provided for all the basic types and blanket implementations for common container types, such as, arrays, slices, tuples, Vec and HashMap. For easy implementation for custom types, use Type derive macro from zvariant_derive crate.

If your type’s signature cannot be determined statically, you should implement the DynamicType trait instead, which is otherwise automatically implemented if you implement this trait.

Required Methods§

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fn signature() -> Signature<'static>

Get the signature for the implementing type.

§Example
use std::collections::HashMap;
use zvariant::Type;

assert_eq!(u32::signature(), "u");
assert_eq!(String::signature(), "s");
assert_eq!(<(u32, &str, u64)>::signature(), "(ust)");
assert_eq!(<(u32, &str, &[u64])>::signature(), "(usat)");
assert_eq!(<HashMap<u8, &str>>::signature(), "a{ys}");

Object Safety§

This trait is not object safe.

Implementations on Foreign Types§

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impl Type for IpAddr

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fn signature() -> Signature<'static>

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impl Type for Month

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fn signature() -> Signature<'static>

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impl Type for Weekday

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fn signature() -> Signature<'static>

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impl Type for bool

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fn signature() -> Signature<'static>

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impl Type for char

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fn signature() -> Signature<'static>

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impl Type for f32

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fn signature() -> Signature<'static>

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impl Type for f64

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fn signature() -> Signature<'static>

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impl Type for i8

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fn signature() -> Signature<'static>

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impl Type for i16

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fn signature() -> Signature<'static>

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impl Type for i32

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fn signature() -> Signature<'static>

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impl Type for i64

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fn signature() -> Signature<'static>

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impl Type for str

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fn signature() -> Signature<'static>

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impl Type for u8

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fn signature() -> Signature<'static>

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impl Type for u16

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fn signature() -> Signature<'static>

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impl Type for u32

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fn signature() -> Signature<'static>

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impl Type for u64

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fn signature() -> Signature<'static>

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impl Type for ()

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fn signature() -> Signature<'static>

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impl Type for String

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fn signature() -> Signature<'static>

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impl Type for Ipv4Addr

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fn signature() -> Signature<'static>

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impl Type for Ipv6Addr

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fn signature() -> Signature<'static>

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impl Type for Duration

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fn signature() -> Signature<'static>

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impl Type for Path

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fn signature() -> Signature<'static>

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impl Type for PathBuf

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fn signature() -> Signature<'static>

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impl Type for SystemTime

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fn signature() -> Signature<'static>

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impl Type for NaiveDateTime

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fn signature() -> Signature<'static>

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impl Type for NaiveTime

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fn signature() -> Signature<'static>

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impl Type for ByteBuf

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fn signature() -> Signature<'static>

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impl Type for Bytes

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fn signature() -> Signature<'static>

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impl Type for Date

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fn signature() -> Signature<'static>

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impl Type for Duration

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fn signature() -> Signature<'static>

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impl Type for OffsetDateTime

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fn signature() -> Signature<'static>

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impl Type for PrimitiveDateTime

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fn signature() -> Signature<'static>

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impl Type for Time

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fn signature() -> Signature<'static>

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impl Type for UtcOffset

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fn signature() -> Signature<'static>

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impl Type for Url

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fn signature() -> Signature<'static>

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impl Type for Uuid

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fn signature() -> Signature<'static>

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impl Type for NonZeroI8

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fn signature() -> Signature<'static>

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impl Type for NonZeroI16

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fn signature() -> Signature<'static>

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impl Type for NonZeroI32

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fn signature() -> Signature<'static>

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impl Type for NonZeroI64

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fn signature() -> Signature<'static>

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impl Type for NonZeroU8

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fn signature() -> Signature<'static>

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impl Type for NonZeroU16

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fn signature() -> Signature<'static>

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impl Type for NonZeroU32

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fn signature() -> Signature<'static>

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impl Type for NonZeroU64

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fn signature() -> Signature<'static>

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impl<F> Type for BitFlags<F>
where F: Type + BitFlag,

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fn signature() -> Signature<'static>

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impl<K, V> Type for BTreeMap<K, V>
where K: Type + Ord, V: Type,

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fn signature() -> Signature<'static>

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impl<K, V, H> Type for HashMap<K, V, H>
where K: Type + Eq + Hash, V: Type, H: BuildHasher,

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fn signature() -> Signature<'static>

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impl<T0> Type for (T0,)
where T0: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1> Type for (T0, T1)
where T0: Type, T1: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2> Type for (T0, T1, T2)
where T0: Type, T1: Type, T2: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3> Type for (T0, T1, T2, T3)
where T0: Type, T1: Type, T2: Type, T3: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4> Type for (T0, T1, T2, T3, T4)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5> Type for (T0, T1, T2, T3, T4, T5)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6> Type for (T0, T1, T2, T3, T4, T5, T6)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7> Type for (T0, T1, T2, T3, T4, T5, T6, T7)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type, T11: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type, T11: Type, T12: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type, T11: Type, T12: Type, T13: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type, T11: Type, T12: Type, T13: Type, T14: Type,

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fn signature() -> Signature<'static>

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> Type for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)
where T0: Type, T1: Type, T2: Type, T3: Type, T4: Type, T5: Type, T6: Type, T7: Type, T8: Type, T9: Type, T10: Type, T11: Type, T12: Type, T13: Type, T14: Type, T15: Type,

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fn signature() -> Signature<'static>

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impl<T> Type for Option<T>
where T: Type,

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fn signature() -> Signature<'static>

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impl<T> Type for [T]
where T: Type,

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fn signature() -> Signature<'static>

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impl<T> Type for Vec<T>
where T: Type,

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fn signature() -> Signature<'static>

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impl<T> Type for PhantomData<T>
where T: Type + ?Sized,

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fn signature() -> Signature<'static>

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impl<T, S> Type for HashSet<T, S>
where T: Type + Eq + Hash, S: BuildHasher,

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fn signature() -> Signature<'static>

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impl<T, const CAP: usize> Type for ArrayVec<T, CAP>
where T: Type,

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fn signature() -> Signature<'static>

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impl<T, const CAP: usize> Type for Vec<T, CAP>
where T: Type,

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fn signature() -> Signature<'static>

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impl<T, const N: usize> Type for [T; N]
where T: Type,

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type + ToOwned> Type for Cow<'_, T>

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for &T

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for &mut T

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for Box<T>

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for Rc<T>

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for Arc<T>

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for Mutex<T>

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fn signature() -> Signature<'static>

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impl<T: ?Sized + Type> Type for RwLock<T>

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fn signature() -> Signature<'static>

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impl<Tz: TimeZone> Type for DateTime<Tz>

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fn signature() -> Signature<'static>

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impl<const CAP: usize> Type for ArrayString<CAP>

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fn signature() -> Signature<'static>

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impl<const CAP: usize> Type for String<CAP>

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fn signature() -> Signature<'static>

Implementors§

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impl Type for Fd<'_>

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impl Type for OwnedFd

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impl Type for OwnedObjectPath

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impl Type for OwnedSignature

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impl Type for OwnedValue

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impl<'a> Type for Value<'a>

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impl<'a> Type for CompleteType<'a>

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impl<'a> Type for ObjectPath<'a>

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impl<'a> Type for Signature<'a>

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impl<'a> Type for Str<'a>

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impl<'a, T: Type + Serialize> Type for SerializeValue<'a, T>

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impl<'de, T: Type + Deserialize<'de>> Type for DeserializeValue<'de, T>

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impl<T> Type for Optional<T>
where T: Type,