Module sciter::value
[−]
[src]
Rust interface to sciter::value.
Sciter Value
holds superset of JSON objects.
It can contain as pure JSON objects (numbers, strings, maps and arrays) as internal objects like DOM elements, proxies of script functions, objects and arrays.
Basic usage
You can create an empty (undefined) sciter Value
with new()
:
use sciter::Value; let v = Value::new(); assert!(v.is_undefined()); assert!(!v.is_null());
Or explicitly create Value
for specified type:
use sciter::Value; let v = Value::null(); assert!(v.is_null()); let v = Value::symbol("hello"); assert!(v.is_symbol()); assert!(v.is_string()); let v = Value::error("hello"); assert!(v.is_error_string()); assert!(v.is_string()); // allocate a new array with 4 empty elements let v = Value::array(4); assert!(v.is_array()); assert!(v.len() == 4); // allocate a new value with map type let v = Value::map(); assert!(v.is_map()); assert!(v.len() == 0);
Also there is conversion from Rust types:
use sciter::Value; let v = Value::from(true); assert!(v.is_bool()); let v = Value::from(1); assert!(v.is_int()); let v = Value::from(1.0); assert!(v.is_float()); let v = Value::from("hello"); assert!(v.is_string()); let v = Value::from(b"123".as_ref()); assert!(v.is_bytes());
And from sequence of objects:
use sciter::Value; let v: Value = ["1","2","3"].iter().cloned().collect(); assert!(v.is_array()); assert_eq!(v.len(), 3); assert_eq!(v[0], Value::from("1"));
To access its contents you should use one of to_
methods:
use sciter::Value; let v = Value::from(4); assert_eq!(v.to_int(), Some(4));
Note that there is two functions that converts Value
to JSON and back:
use sciter::Value; let mut v: Value = "[1, 2, 3, 4]".parse().unwrap(); let json_str = v.into_string();
Array access:
use sciter::Value; let mut v: Value = "[10, 20]".parse().unwrap(); assert_eq!(v[0], Value::from(10)); // explicit arguments: v.set(1, Value::from(21)); v.set(2, Value::from(22)); // implicit arguments: v.set(1, 21); v.set(2, 22); assert_eq!(v.len(), 3); assert!(v.get(0).is_int());
Map access:
use sciter::Value; let mut v: Value = "{one: 1, two: 2}".parse().unwrap(); assert_eq!(v["one"], 1.into()); assert_eq!(v.get_item("one"), 1.into()); assert_eq!(v[Value::from("one")], Value::from(1)); v.set_item("three", 3); assert!(v.get_item("one").is_int());
Structs
Value |
sciter::value wrapper. See the module-level documentation. |
Enums
VALUE_RESULT | |
VALUE_STRING_CVT_TYPE | |
VALUE_TYPE |
Traits
FromValue |
Helper trait |