[−][src]Enum boa::js::value::ValueData

pub enum ValueData {
    Null,
    Undefined,
    Boolean(bool),
    String(String),
    Number(f64),
    Integer(i32),
    Object(GcCell<ObjectData>, GcCell<ObjectData>),
    Function(GcCell<Function>),
}

A Javascript value

Variants

Null

null - A null value, for when a value doesn't exist

Undefined

undefined - An undefined value, for when a field or index doesn't exist

Boolean(bool)

boolean - A true / false value, for if a certain criteria is met

String(String)

String - A UTF-8 string, such as "Hello, world"

Number(f64)

Number - A 64-bit floating point number, such as 3.1415

Integer(i32)

Number - A 32-bit integer, such as 42

Object(GcCell<ObjectData>, GcCell<ObjectData>)

Object - An object, such as Math, represented by a binary tree of string keys to Javascript values Some Objects will need an internal slot to hold private values, so our second ObjectData is for that The second object storage is optional for now

Function(GcCell<Function>)

Function - A runnable block of code, such as Math.sqrt, which can take some variables and return a useful value or act upon an object

Methods

`impl ValueData`[src]

`pub fn new_obj(global: Option<&Value>) -> Value`[src]

Returns a new empty object

`pub fn new_obj_from_prototype(proto: Value) -> Value`[src]

Similar to new_obj, but you can pass a prototype to create from

`pub fn is_extensible(&self) -> bool`[src]

This will tell us if we can exten an object or not, not properly implemented yet, for now always returns true For scalar types it should be false, for objects check the private field for extensibilaty. By default true https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/seal would turn extensible to false https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze would also turn extensible to false

`pub fn is_object(&self) -> bool`[src]

Returns true if the value is an object

`pub fn is_function(&self) -> bool`[src]

Returns true if the value is a function

`pub fn is_undefined(&self) -> bool`[src]

Returns true if the value is undefined

`pub fn is_null(&self) -> bool`[src]

Returns true if the value is null

`pub fn is_null_or_undefined(&self) -> bool`[src]

Returns true if the value is null or undefined

`pub fn is_double(&self) -> bool`[src]

Returns true if the value is a 64-bit floating-point number

`pub fn is_string(&self) -> bool`[src]

Returns true if the value is a string

`pub fn is_true(&self) -> bool`[src]

Returns true if the value is true toBoolean

`pub fn to_num(&self) -> f64`[src]

Converts the value into a 64-bit floating point number

`pub fn to_int(&self) -> i32`[src]

Converts the value into a 32-bit integer

`pub fn remove_prop(&self, field: &String)`[src]

remove_prop removes a property from a Value object. It will return a boolean based on if the value was removed, if there was no value to remove false is returned

`pub fn get_prop(&self, field: String) -> Option<Property>`[src]

Resolve the property in the object Returns a copy of the Property

`pub fn update_prop( &self, field: String, value: Option<Value>, enumerable: Option<bool>, writable: Option<bool>, configurable: Option<bool> )`[src]

update_prop will overwrite individual Property fields, unlike Set_prop, which will overwrite prop with a new Property Mostly used internally for now

`pub fn get_private_prop(&self, field: String) -> Option<Property>`[src]

Resolve the property in the object Returns a copy of the Property

`pub fn get_private_field(&self, field: String) -> Value`[src]

Resolve the property in the object and get its value, or undefined if this is not an object or the field doesn't exist get_field recieves a Property from get_prop(). It should then return the [[Get]] result value if that's set, otherwise fall back to [Value]

`pub fn get_field(&self, field: String) -> Value`[src]

Resolve the property in the object and get its value, or undefined if this is not an object or the field doesn't exist get_field recieves a Property from get_prop(). It should then return the [[Get]] result value if that's set, otherwise fall back to [Value]