Struct wasm_encoder::ComponentImportSection

pub struct ComponentImportSection { /* private fields */ }

An encoder for the import section of WebAssembly components.

Example

use wasm_encoder::{Component, ComponentTypeSection, PrimitiveValType, ComponentImportSection, ComponentTypeRef, ComponentExternName};

let mut types = ComponentTypeSection::new();

// Define a function type of `[string, string] -> string`.
types
  .function()
  .params(
    [
      ("a", PrimitiveValType::String),
      ("b", PrimitiveValType::String)
    ]
  )
  .result(PrimitiveValType::String);

// This imports a function named `f` with the type defined above
let mut imports = ComponentImportSection::new();
let name = ComponentExternName::Kebab("f");
imports.import(name, ComponentTypeRef::Func(0));

let mut component = Component::new();
component.section(&types);
component.section(&imports);

let bytes = component.finish();

Implementations

impl ComponentImportSection

pub fn new() -> Self

Create a new component import section encoder.

pub fn len(&self) -> u32

The number of imports in the section.

pub fn is_empty(&self) -> bool

Determines if the section is empty.

pub fn import( &mut self, name: impl AsComponentExternName, ty: ComponentTypeRef ) -> &mut Self

Define an import in the component import section.

Trait Implementations

impl Clone for ComponentImportSection

fn clone(&self) -> ComponentImportSection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl ComponentSection for ComponentImportSection

fn id(&self) -> u8

Gets the section identifier for this section.

fn append_to_component(&self, dst: &mut Vec<u8>)

Appends this section to the specified destination list of bytes.

impl Debug for ComponentImportSection

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

Formats the value using the given formatter.

impl Default for ComponentImportSection

fn default() -> ComponentImportSection

Returns the “default value” for a type.

impl Encode for ComponentImportSection

fn encode(&self, sink: &mut Vec<u8>)

Encode the type into the given byte sink.