Struct wasmtime_environ::wasmparser::WasmFeatures

pub struct WasmFeatures {

    pub mutable_global: bool,
    pub saturating_float_to_int: bool,
    pub sign_extension: bool,
    pub reference_types: bool,
    pub multi_value: bool,
    pub bulk_memory: bool,
    pub simd: bool,
    pub relaxed_simd: bool,
    pub threads: bool,
    pub tail_call: bool,
    pub floats: bool,
    pub multi_memory: bool,
    pub exceptions: bool,
    pub memory64: bool,
    pub extended_const: bool,
    pub component_model: bool,
}

Flags for features that are enabled for validation.

Fields

mutable_global: bool

The WebAssembly mutable-global proposal (enabled by default)

saturating_float_to_int: bool

The WebAssembly nontrapping-float-to-int-conversions proposal (enabled by default)

sign_extension: bool

The WebAssembly sign-extension-ops proposal (enabled by default)

reference_types: bool

The WebAssembly reference types proposal (enabled by default)

multi_value: bool

The WebAssembly multi-value proposal (enabled by default)

bulk_memory: bool

The WebAssembly bulk memory operations proposal (enabled by default)

simd: bool

The WebAssembly SIMD proposal (enabled by default)

relaxed_simd: bool

The WebAssembly Relaxed SIMD proposal

threads: bool

The WebAssembly threads proposal

tail_call: bool

The WebAssembly tail-call proposal

floats: bool

Whether or not floating-point instructions are enabled.

This is enabled by default can be used to disallow floating-point operators. Note that disabling this does not disable the f32 and f64 wasm types, only the operators that work on them.

This does not correspond to a WebAssembly proposal but is instead intended for embeddings which have stricter-than-usual requirements about execution. Floats in WebAssembly can have different NaN patterns across hosts which can lead to host-dependent execution which some runtimes may not desire.

multi_memory: bool

The WebAssembly multi memory proposal

exceptions: bool

The WebAssembly exception handling proposal

memory64: bool

The WebAssembly memory64 proposal

extended_const: bool

The WebAssembly extended_const proposal

component_model: bool

The WebAssembly component model proposal.

Trait Implementations

impl Clone for WasmFeatures

fn clone(&self) -> WasmFeatures

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WasmFeatures

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

Formats the value using the given formatter.

impl Default for WasmFeatures

fn default() -> WasmFeatures

Returns the “default value” for a type.

impl Hash for WasmFeatures

fn hash<__H>(&self, state: &mut __H)where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Copy for WasmFeatures