Module glib::variant

Variant binding and helper traits.

Variant is an immutable dynamically-typed generic container. Its type and value are defined at construction and never change.

Variant types are described by VariantType "type strings".

Although GVariant supports arbitrarily complex types, this binding is currently limited to the basic ones: bool, u8, i16, u16, i32, u32, i64, u64, f64, &str/String, and VariantDict.

Examples

use glib::prelude::*; // or `use gtk::prelude::*;`
use glib::Variant;

// Using the `ToVariant` trait.
let num = 10.to_variant();

// `is` tests the type of the value.
assert!(num.is::<i32>());

// `get` tries to extract the value.
assert_eq!(num.get::<i32>(), Some(10));
assert_eq!(num.get::<u32>(), None);

// `Variant` implements `From`
let hello = Variant::from("Hello!");

// `get_str` tries to borrow a string slice.
assert_eq!(hello.get_str(), Some("Hello!"));
assert_eq!(num.get_str(), None);

Structs

Variant

A generic immutable value capable of carrying various types.

Traits

FromVariant	Extracts a value.
StaticVariantType	Returns VariantType of Self.
ToVariant	Converts to Variant.