Module conversions

Conversions of Rust values to and from JSVal.

IDL type	Type
any	JSVal
boolean	bool
byte	i8
octet	u8
short	i16
unsigned short	u16
long	i32
unsigned long	u32
long long	i64
unsigned long long	u64
unrestricted float	f32
float	Finite<f32>
unrestricted double	f64
double	Finite<f64>
USVString	String
object	*mut JSObject
symbol	*mut Symbol
nullable types	Option<T>
sequences	Vec<T>

Macros

impl_as 🔒

impl_num 🔒

Structs

ForOfIteratorGuard 🔒

Rooting guard for the iterator field of ForOfIterator. Behaves like RootedGuard (roots on creation, unroots on drop), but borrows and allows access to the whole ForOfIterator, so that methods on ForOfIterator can still be used through it.

Enums

ConversionBehavior

Behavior for converting out-of-range integers.

ConversionResult

An enum to better support enums through FromJSValConvertible::from_jsval.

Traits

As 🔒

FromJSValConvertible

A trait to convert JSVals to Rust types.

FromJSValConvertibleRc

A trait to convert JSVals to Rust types inside of Rc wrappers.

Number

Similar to num_traits, but we use need to be able to customize values

ToJSValConvertible

A trait to convert Rust types to JSVals.

Functions

clamp_to 🔒

Try to cast the number to a smaller type, but if it doesn’t fit, round it to the MAX or MIN of the source type before casting it to the destination type.

convert_int_from_jsval 🔒 ^⚠

enforce_range 🔒 ^⚠

Try to cast the number to a smaller type, but if it doesn’t fit, it will return an error.

jsstr_to_string^⚠

Converts a JSString into a String, regardless of used encoding.

latin1_to_string^⚠

Converts a JSString, encoded in “Latin1” (i.e. U+0000-U+00FF encoded as 0x00-0xFF) into a String.