Enum wasmer::Value

source · [−]

pub enum Value {
    I32(i32),
    I64(i64),
    F32(f32),
    F64(f64),
    ExternRef(Option<ExternRef>),
    FuncRef(Option<Function>),
    V128(u128),
}

Expand description

WebAssembly computations manipulate values of basic value types:

Integers (32 or 64 bit width)
Floating-point (32 or 64 bit width)
Vectors (128 bits, with 32 or 64 bit lanes)

Spec: https://webassembly.github.io/spec/core/exec/runtime.html#values

Variants

`I32(i32)`

A 32-bit integer.

In Wasm integers are sign-agnostic, i.e. this can either be signed or unsigned.

`I64(i64)`

A 64-bit integer.

In Wasm integers are sign-agnostic, i.e. this can either be signed or unsigned.

`F32(f32)`

A 32-bit float.

`F64(f64)`

A 64-bit float.

`ExternRef(Option<ExternRef>)`

An externref value which can hold opaque data to the wasm instance itself.

`FuncRef(Option<Function>)`

A first-class reference to a WebAssembly function.

`V128(u128)`

A 128-bit number

Implementations

source

impl Value

source

pub fn null() -> Self

Returns a null externref value.

source

pub fn ty(&self) -> Type

Returns the corresponding Type for this Value.

source

pub fn as_raw(&self, store: &impl AsStoreRef) -> RawValue

Converts the Value into a RawValue.

source

pub unsafe fn from_raw(
    store: &mut impl AsStoreMut,
    ty: Type,
    raw: RawValue
) -> Self

Converts a RawValue to a Value.

Safety

source

pub fn is_from_store(&self, store: &impl AsStoreRef) -> bool

Checks whether a value can be used with the given context.

Primitive (i32, i64, etc) and null funcref/externref values are not tied to a context and can be freely shared between contexts.

Externref and funcref values are tied to a context and can only be used with that context.

source

pub fn i32(&self) -> Option<i32>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_i32(&self) -> i32

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn i64(&self) -> Option<i64>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_i64(&self) -> i64

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn f32(&self) -> Option<f32>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_f32(&self) -> f32

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn f64(&self) -> Option<f64>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_f64(&self) -> f64

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn externref(&self) -> Option<&Option<ExternRef>>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_externref(&self) -> &Option<ExternRef>

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn funcref(&self) -> Option<&Option<Function>>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_funcref(&self) -> &Option<Function>

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

source

pub fn v128(&self) -> Option<u128>

Attempt to access the underlying value of this Value, returning None if it is not the correct type.

source

pub fn unwrap_v128(&self) -> u128

Returns the underlying value of this Value, panicking if it’s the wrong type.

Panics

Panics if self is not of the right type.

Trait Implementations

source

impl Clone for Value

source

fn clone(&self) -> Value

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

source

impl Debug for Value

source

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

source