Struct rusty_v8::External [−][src]
#[repr(C)]pub struct External(_);
Expand description
A JavaScript value that wraps a C++ void*. This type of value is mainly used to associate C++ data structures with JavaScript objects.
Implementations
Methods from Deref<Target = Value>
Returns true if this value is the undefined value. See ECMA-262 4.3.10.
Returns true if this value is the null value. See ECMA-262 4.3.11.
Returns true if this value is either the null or the undefined value. See ECMA-262 4.3.11. and 4.3.12
Returns true if this value is true.
This is not the same as BooleanValue()
. The latter performs a
conversion to boolean, i.e. the result of Boolean(value)
in JS, whereas
this checks value === true
.
Returns true if this value is false.
This is not the same as !BooleanValue()
. The latter performs a
conversion to boolean, i.e. the result of !Boolean(value)
in JS, whereas
this checks value === false
.
Returns true if this value is a symbol or a string.
This is equivalent to
typeof value === 'string' || typeof value === 'symbol'
in JS.
Returns true if this value is an instance of the String type. See ECMA-262 8.4.
Returns true if this value is a symbol.
This is equivalent to typeof value === 'symbol'
in JS.
Returns true if this value is a function.
Returns true if this value is an array. Note that it will return false for an Proxy for an array.
Returns true if this value is a bigint.
This is equivalent to typeof value === 'bigint'
in JS.
Returns true if this value is boolean.
This is equivalent to typeof value === 'boolean'
in JS.
Returns true if this value is an External
object.
Returns true if this value is an Arguments object.
Returns true if this value is a BigInt object.
Returns true if this value is a Boolean object.
Returns true if this value is a Number object.
Returns true if this value is a String object.
Returns true if this value is a Symbol object.
Returns true if this value is a NativeError.
Returns true if this value is a RegExp.
Returns true if this value is an async function.
Returns true if this value is a Generator function.
Returns true if this value is a Promise.
Returns true if this value is a Map Iterator.
Returns true if this value is a Set Iterator.
Returns true if this value is a WeakMap.
Returns true if this value is a WeakSet.
Returns true if this value is an ArrayBuffer.
Returns true if this value is an ArrayBufferView.
Returns true if this value is one of TypedArrays.
Returns true if this value is an Uint8Array.
Returns true if this value is an Uint8ClampedArray.
Returns true if this value is an Int8Array.
Returns true if this value is an Uint16Array.
Returns true if this value is an Int16Array.
Returns true if this value is an Uint32Array.
Returns true if this value is an Int32Array.
Returns true if this value is a Float32Array.
Returns true if this value is a Float64Array.
Returns true if this value is a BigInt64Array.
Returns true if this value is a BigUint64Array.
Returns true if this value is a DataView.
Returns true if this value is a SharedArrayBuffer. This is an experimental feature.
Returns true if this value is a WasmModuleObject.
Returns true if the value is a Module Namespace Object.
Implements the the abstract operation SameValueZero
, which is defined in
ECMA-262 6th edition § 7.2.10
(http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero).
This operation is used to compare values for the purpose of insertion into
a Set
, or determining whether Map
keys are equivalent. Its semantics
are almost the same as strict_equals()
and same_value()
, with the
following important distinctions:
- It considers
NaN
equal toNaN
(unlikestrict_equals()
). - It considers
-0
equal to0
(unlikesame_value()
).
Convenience function not present in the original V8 API.
Perform the equivalent of Boolean(value) in JS. This can never fail.
Methods from Deref<Target = Data>
Returns the V8 hash value for this value. The current implementation uses a hidden property to store the identity hash on some object types.
The return value will never be 0. Also, it is not guaranteed to be unique.
Returns true if this data is a Private
.
Returns true if this data is an ObjectTemplate
Returns true if this data is a FunctionTemplate.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for External
impl UnwindSafe for External