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use crate::component::*;
use crate::{ExportKind, Module, NameMap, RawSection, ValType};
use alloc::format;
use alloc::vec::Vec;
use core::mem;
/// Convenience type to build a component incrementally and automatically keep
/// track of index spaces.
///
/// This type is intended to be a wrapper around the [`Component`] encoding type
/// which is useful for building it up incrementally over time. This type will
/// automatically collect definitions into sections and reports the index of all
/// items added by keeping track of indices internally.
#[derive(Debug, Default)]
pub struct ComponentBuilder {
/// The binary component that's being built.
component: Component,
/// The last section which was appended to during encoding. This type is
/// generated by the `section_accessors` macro below.
///
/// When something is encoded this is used if it matches the kind of item
/// being encoded, otherwise it's "flushed" to the output component and a
/// new section is started.
last_section: LastSection,
// Core index spaces
core_modules: Namespace,
core_funcs: Namespace,
core_types: Namespace,
core_memories: Namespace,
core_tables: Namespace,
core_instances: Namespace,
core_tags: Namespace,
core_globals: Namespace,
// Component index spaces
funcs: Namespace,
instances: Namespace,
types: Namespace,
components: Namespace,
values: Namespace,
}
impl ComponentBuilder {
/// Returns the current number of core modules.
pub fn core_module_count(&self) -> u32 {
self.core_modules.count
}
/// Returns the current number of core funcs.
pub fn core_func_count(&self) -> u32 {
self.core_funcs.count
}
/// Returns the current number of core types.
pub fn core_type_count(&self) -> u32 {
self.core_types.count
}
/// Returns the current number of core memories.
pub fn core_memory_count(&self) -> u32 {
self.core_memories.count
}
/// Returns the current number of core tables.
pub fn core_table_count(&self) -> u32 {
self.core_tables.count
}
/// Returns the current number of core instances.
pub fn core_instance_count(&self) -> u32 {
self.core_instances.count
}
/// Returns the current number of core tags.
pub fn core_tag_count(&self) -> u32 {
self.core_tags.count
}
/// Returns the current number of core globals.
pub fn core_global_count(&self) -> u32 {
self.core_globals.count
}
/// Returns the current number of component funcs.
pub fn func_count(&self) -> u32 {
self.funcs.count
}
/// Returns the current number of component instances.
pub fn instance_count(&self) -> u32 {
self.instances.count
}
/// Returns the current number of component values.
pub fn value_count(&self) -> u32 {
self.values.count
}
/// Returns the current number of components.
pub fn component_count(&self) -> u32 {
self.components.count
}
/// Returns the current number of component types.
pub fn type_count(&self) -> u32 {
self.types.count
}
/// Add all debug names registered to the component.
pub fn append_names(&mut self) {
let mut names = ComponentNameSection::new();
if !self.core_funcs.names.is_empty() {
names.core_funcs(&self.core_funcs.names);
}
if !self.core_tables.names.is_empty() {
names.core_tables(&self.core_tables.names);
}
if !self.core_memories.names.is_empty() {
names.core_memories(&self.core_memories.names);
}
if !self.core_globals.names.is_empty() {
names.core_globals(&self.core_globals.names);
}
if !self.core_tags.names.is_empty() {
names.core_tags(&self.core_tags.names);
}
if !self.core_types.names.is_empty() {
names.core_types(&self.core_types.names);
}
if !self.core_modules.names.is_empty() {
names.core_modules(&self.core_modules.names);
}
if !self.core_instances.names.is_empty() {
names.core_instances(&self.core_instances.names);
}
if !self.instances.names.is_empty() {
names.instances(&self.instances.names);
}
if !self.funcs.names.is_empty() {
names.funcs(&self.funcs.names);
}
if !self.types.names.is_empty() {
names.types(&self.types.names);
}
if !self.components.names.is_empty() {
names.components(&self.components.names);
}
if !self.instances.names.is_empty() {
names.instances(&self.instances.names);
}
if !names.is_empty() {
self.custom_section(&names.as_custom());
}
}
/// Completes this component and returns the binary encoding of the entire
/// component.
pub fn finish(mut self) -> Vec<u8> {
self.flush();
self.component.finish()
}
/// Encodes a core wasm `Module` into this component, returning its index.
pub fn core_module(&mut self, debug_name: Option<&str>, module: &Module) -> u32 {
self.flush();
self.component.section(&ModuleSection(module));
self.core_modules.add(debug_name)
}
/// Encodes a core wasm `module` into this component, returning its index.
pub fn core_module_raw(&mut self, debug_name: Option<&str>, module: &[u8]) -> u32 {
self.flush();
self.component.section(&RawSection {
id: ComponentSectionId::CoreModule.into(),
data: module,
});
self.core_modules.add(debug_name)
}
/// Instantiates a core wasm module at `module_index` with the `args`
/// provided.
///
/// Returns the index of the core wasm instance created.
pub fn core_instantiate<'a, A>(
&mut self,
debug_name: Option<&str>,
module_index: u32,
args: A,
) -> u32
where
A: IntoIterator<Item = (&'a str, ModuleArg)>,
A::IntoIter: ExactSizeIterator,
{
self.instances().instantiate(module_index, args);
self.core_instances.add(debug_name)
}
/// Creates a new core wasm instance from the `exports` provided.
///
/// Returns the index of the core wasm instance created.
pub fn core_instantiate_exports<'a, E>(&mut self, debug_name: Option<&str>, exports: E) -> u32
where
E: IntoIterator<Item = (&'a str, ExportKind, u32)>,
E::IntoIter: ExactSizeIterator,
{
self.instances().export_items(exports);
self.core_instances.add(debug_name)
}
/// Creates a new aliased item where the core `instance` specified has its
/// export `name` aliased out with the `kind` specified.
///
/// Returns the index of the item created.
pub fn core_alias_export(
&mut self,
debug_name: Option<&str>,
instance: u32,
name: &str,
kind: ExportKind,
) -> u32 {
self.alias(
debug_name,
Alias::CoreInstanceExport {
instance,
kind,
name,
},
)
}
/// Adds a new alias to this component
pub fn alias(&mut self, debug_name: Option<&str>, alias: Alias<'_>) -> u32 {
self.aliases().alias(alias);
match alias {
Alias::InstanceExport { kind, .. } => self.inc_kind(debug_name, kind),
Alias::CoreInstanceExport { kind, .. } => self.inc_core_kind(debug_name, kind),
Alias::Outer {
kind: ComponentOuterAliasKind::Type,
..
} => self.types.add(debug_name),
Alias::Outer {
kind: ComponentOuterAliasKind::CoreModule,
..
} => self.core_modules.add(debug_name),
Alias::Outer {
kind: ComponentOuterAliasKind::Component,
..
} => self.components.add(debug_name),
Alias::Outer {
kind: ComponentOuterAliasKind::CoreType,
..
} => self.core_types.add(debug_name),
}
}
/// Creates an alias to a previous component instance's exported item.
///
/// The `instance` provided is the instance to access and the `name` is the
/// item to access.
///
/// Returns the index of the new item defined.
pub fn alias_export(&mut self, instance: u32, name: &str, kind: ComponentExportKind) -> u32 {
self.alias(
Some(name),
Alias::InstanceExport {
instance,
kind,
name,
},
)
}
fn inc_kind(&mut self, debug_name: Option<&str>, kind: ComponentExportKind) -> u32 {
match kind {
ComponentExportKind::Func => self.funcs.add(debug_name),
ComponentExportKind::Module => self.core_modules.add(debug_name),
ComponentExportKind::Type => self.types.add(debug_name),
ComponentExportKind::Component => self.components.add(debug_name),
ComponentExportKind::Instance => self.instances.add(debug_name),
ComponentExportKind::Value => self.values.add(debug_name),
}
}
fn inc_core_kind(&mut self, debug_name: Option<&str>, kind: ExportKind) -> u32 {
match kind {
ExportKind::Func => self.core_funcs.add(debug_name),
ExportKind::Table => self.core_tables.add(debug_name),
ExportKind::Memory => self.core_memories.add(debug_name),
ExportKind::Global => self.core_globals.add(debug_name),
ExportKind::Tag => self.core_tags.add(debug_name),
}
}
/// Lowers the `func_index` component function into a core wasm function
/// using the `options` provided.
///
/// Returns the index of the core wasm function created.
pub fn lower_func<O>(&mut self, debug_name: Option<&str>, func_index: u32, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().lower(func_index, options);
self.core_funcs.add(debug_name)
}
/// Lifts the core wasm `core_func_index` function with the component
/// function type `type_index` and `options`.
///
/// Returns the index of the component function created.
pub fn lift_func<O>(
&mut self,
debug_name: Option<&str>,
core_func_index: u32,
type_index: u32,
options: O,
) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions()
.lift(core_func_index, type_index, options);
self.funcs.add(debug_name)
}
/// Imports a new item into this component with the `name` and `ty` specified.
pub fn import(&mut self, name: &str, ty: ComponentTypeRef) -> u32 {
let ret = match &ty {
ComponentTypeRef::Instance(_) => self.instances.add(Some(name)),
ComponentTypeRef::Func(_) => self.funcs.add(Some(name)),
ComponentTypeRef::Type(..) => self.types.add(Some(name)),
ComponentTypeRef::Component(_) => self.components.add(Some(name)),
ComponentTypeRef::Module(_) => self.core_modules.add(Some(name)),
ComponentTypeRef::Value(_) => self.values.add(Some(name)),
};
self.imports().import(name, ty);
ret
}
/// Exports a new item from this component with the `name` and `kind`
/// specified.
///
/// The `idx` is the item to export and the `ty` is an optional type to
/// ascribe to the export.
pub fn export(
&mut self,
name: &str,
kind: ComponentExportKind,
idx: u32,
ty: Option<ComponentTypeRef>,
) -> u32 {
self.exports().export(name, kind, idx, ty);
self.inc_kind(Some(name), kind)
}
/// Creates a new encoder for the next core type in this component.
pub fn core_type(&mut self, debug_name: Option<&str>) -> (u32, ComponentCoreTypeEncoder<'_>) {
(self.core_types.add(debug_name), self.core_types().ty())
}
/// Creates a new encoder for the next type in this component.
pub fn ty(&mut self, debug_name: Option<&str>) -> (u32, ComponentTypeEncoder<'_>) {
(self.types.add(debug_name), self.types().ty())
}
/// Creates a new instance type within this component.
pub fn type_instance(&mut self, debug_name: Option<&str>, ty: &InstanceType) -> u32 {
self.types().instance(ty);
self.types.add(debug_name)
}
/// Creates a new component type within this component.
pub fn type_component(&mut self, debug_name: Option<&str>, ty: &ComponentType) -> u32 {
self.types().component(ty);
self.types.add(debug_name)
}
/// Creates a new defined component type within this component.
pub fn type_defined(
&mut self,
debug_name: Option<&str>,
) -> (u32, ComponentDefinedTypeEncoder<'_>) {
(self.types.add(debug_name), self.types().defined_type())
}
/// Creates a new component function type within this component.
pub fn type_function(
&mut self,
debug_name: Option<&str>,
) -> (u32, ComponentFuncTypeEncoder<'_>) {
(self.types.add(debug_name), self.types().function())
}
/// Declares a new resource type within this component.
pub fn type_resource(
&mut self,
debug_name: Option<&str>,
rep: ValType,
dtor: Option<u32>,
) -> u32 {
self.types().resource(rep, dtor);
self.types.add(debug_name)
}
/// Defines a new subcomponent of this component.
pub fn component(&mut self, debug_name: Option<&str>, mut builder: ComponentBuilder) -> u32 {
builder.flush();
self.flush();
self.component
.section(&NestedComponentSection(&builder.component));
self.components.add(debug_name)
}
/// Defines a new subcomponent of this component.
pub fn component_raw(&mut self, debug_name: Option<&str>, data: &[u8]) -> u32 {
let raw_section = RawSection {
id: ComponentSectionId::Component.into(),
data,
};
self.flush();
self.component.section(&raw_section);
self.components.add(debug_name)
}
/// Instantiates the `component_index` specified with the `args` specified.
pub fn instantiate<A, S>(
&mut self,
debug_name: Option<&str>,
component_index: u32,
args: A,
) -> u32
where
A: IntoIterator<Item = (S, ComponentExportKind, u32)>,
A::IntoIter: ExactSizeIterator,
S: AsRef<str>,
{
self.component_instances()
.instantiate(component_index, args);
self.instances.add(debug_name)
}
/// Declares a new `resource.drop` intrinsic.
pub fn resource_drop(&mut self, ty: u32) -> u32 {
self.canonical_functions().resource_drop(ty);
self.core_funcs.add(Some("resource.drop"))
}
/// Declares a new `resource.drop` intrinsic.
pub fn resource_drop_async(&mut self, ty: u32) -> u32 {
self.canonical_functions().resource_drop_async(ty);
self.core_funcs.add(Some("resource.drop async"))
}
/// Declares a new `resource.new` intrinsic.
pub fn resource_new(&mut self, ty: u32) -> u32 {
self.canonical_functions().resource_new(ty);
self.core_funcs.add(Some("resource.new"))
}
/// Declares a new `resource.rep` intrinsic.
pub fn resource_rep(&mut self, ty: u32) -> u32 {
self.canonical_functions().resource_rep(ty);
self.core_funcs.add(Some("resource.rep"))
}
/// Declares a new `thread.spawn_ref` intrinsic.
pub fn thread_spawn_ref(&mut self, ty: u32) -> u32 {
self.canonical_functions().thread_spawn_ref(ty);
self.core_funcs.add(Some("thread.spawn-ref"))
}
/// Declares a new `thread.available_parallelism` intrinsic.
pub fn thread_available_parallelism(&mut self) -> u32 {
self.canonical_functions().thread_available_parallelism();
self.core_funcs.add(Some("thread.available-parallelism"))
}
/// Declares a new `backpressure.inc` intrinsic.
pub fn backpressure_inc(&mut self) -> u32 {
self.canonical_functions().backpressure_inc();
self.core_funcs.add(Some("backpressure.inc"))
}
/// Declares a new `backpressure.dec` intrinsic.
pub fn backpressure_dec(&mut self) -> u32 {
self.canonical_functions().backpressure_dec();
self.core_funcs.add(Some("backpressure.dec"))
}
/// Declares a new `task.return` intrinsic.
pub fn task_return<O>(&mut self, ty: Option<ComponentValType>, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().task_return(ty, options);
self.core_funcs.add(Some("task.return"))
}
/// Declares a new `task.cancel` intrinsic.
pub fn task_cancel(&mut self) -> u32 {
self.canonical_functions().task_cancel();
self.core_funcs.add(Some("task.cancel"))
}
/// Declares a new `context.get` intrinsic.
pub fn context_get(&mut self, i: u32) -> u32 {
self.canonical_functions().context_get(i);
self.core_funcs.add(Some(&format!("context.get {i}")))
}
/// Declares a new `context.set` intrinsic.
pub fn context_set(&mut self, i: u32) -> u32 {
self.canonical_functions().context_set(i);
self.core_funcs.add(Some(&format!("context.set {i}")))
}
/// Declares a new `thread.yield` intrinsic.
pub fn thread_yield(&mut self, cancellable: bool) -> u32 {
self.canonical_functions().thread_yield(cancellable);
self.core_funcs.add(Some("thread.yield"))
}
/// Declares a new `subtask.drop` intrinsic.
pub fn subtask_drop(&mut self) -> u32 {
self.canonical_functions().subtask_drop();
self.core_funcs.add(Some("subtask.drop"))
}
/// Declares a new `subtask.cancel` intrinsic.
pub fn subtask_cancel(&mut self, async_: bool) -> u32 {
self.canonical_functions().subtask_cancel(async_);
self.core_funcs.add(Some("subtask.cancel"))
}
/// Declares a new `stream.new` intrinsic.
pub fn stream_new(&mut self, ty: u32) -> u32 {
self.canonical_functions().stream_new(ty);
self.core_funcs.add(Some("stream.new"))
}
/// Declares a new `stream.read` intrinsic.
pub fn stream_read<O>(&mut self, ty: u32, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().stream_read(ty, options);
self.core_funcs.add(Some("stream.read"))
}
/// Declares a new `stream.write` intrinsic.
pub fn stream_write<O>(&mut self, ty: u32, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().stream_write(ty, options);
self.core_funcs.add(Some("stream.write"))
}
/// Declares a new `stream.cancel-read` intrinsic.
pub fn stream_cancel_read(&mut self, ty: u32, async_: bool) -> u32 {
self.canonical_functions().stream_cancel_read(ty, async_);
self.core_funcs.add(Some("stream.cancel-read"))
}
/// Declares a new `stream.cancel-write` intrinsic.
pub fn stream_cancel_write(&mut self, ty: u32, async_: bool) -> u32 {
self.canonical_functions().stream_cancel_write(ty, async_);
self.core_funcs.add(Some("stream.cancel-write"))
}
/// Declares a new `stream.drop-readable` intrinsic.
pub fn stream_drop_readable(&mut self, ty: u32) -> u32 {
self.canonical_functions().stream_drop_readable(ty);
self.core_funcs.add(Some("stream.drop-readable"))
}
/// Declares a new `stream.drop-writable` intrinsic.
pub fn stream_drop_writable(&mut self, ty: u32) -> u32 {
self.canonical_functions().stream_drop_writable(ty);
self.core_funcs.add(Some("stream.drop-writable"))
}
/// Declares a new `future.new` intrinsic.
pub fn future_new(&mut self, ty: u32) -> u32 {
self.canonical_functions().future_new(ty);
self.core_funcs.add(Some("future.new"))
}
/// Declares a new `future.read` intrinsic.
pub fn future_read<O>(&mut self, ty: u32, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().future_read(ty, options);
self.core_funcs.add(Some("future.read"))
}
/// Declares a new `future.write` intrinsic.
pub fn future_write<O>(&mut self, ty: u32, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().future_write(ty, options);
self.core_funcs.add(Some("future.write"))
}
/// Declares a new `future.cancel-read` intrinsic.
pub fn future_cancel_read(&mut self, ty: u32, async_: bool) -> u32 {
self.canonical_functions().future_cancel_read(ty, async_);
self.core_funcs.add(Some("future.cancel-read"))
}
/// Declares a new `future.cancel-write` intrinsic.
pub fn future_cancel_write(&mut self, ty: u32, async_: bool) -> u32 {
self.canonical_functions().future_cancel_write(ty, async_);
self.core_funcs.add(Some("future.cancel-write"))
}
/// Declares a new `future.drop-readable` intrinsic.
pub fn future_drop_readable(&mut self, ty: u32) -> u32 {
self.canonical_functions().future_drop_readable(ty);
self.core_funcs.add(Some("future.drop-readable"))
}
/// Declares a new `future.drop-writable` intrinsic.
pub fn future_drop_writable(&mut self, ty: u32) -> u32 {
self.canonical_functions().future_drop_writable(ty);
self.core_funcs.add(Some("future.drop-writable"))
}
/// Declares a new `error-context.new` intrinsic.
pub fn error_context_new<O>(&mut self, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions().error_context_new(options);
self.core_funcs.add(Some("error-context.new"))
}
/// Declares a new `error-context.debug-message` intrinsic.
pub fn error_context_debug_message<O>(&mut self, options: O) -> u32
where
O: IntoIterator<Item = CanonicalOption>,
O::IntoIter: ExactSizeIterator,
{
self.canonical_functions()
.error_context_debug_message(options);
self.core_funcs.add(Some("error-context.debug-message"))
}
/// Declares a new `error-context.drop` intrinsic.
pub fn error_context_drop(&mut self) -> u32 {
self.canonical_functions().error_context_drop();
self.core_funcs.add(Some("error-context.drop"))
}
/// Declares a new `waitable-set.new` intrinsic.
pub fn waitable_set_new(&mut self) -> u32 {
self.canonical_functions().waitable_set_new();
self.core_funcs.add(Some("waitable-set.new"))
}
/// Declares a new `waitable-set.wait` intrinsic.
pub fn waitable_set_wait(&mut self, cancellable: bool, memory: u32) -> u32 {
self.canonical_functions()
.waitable_set_wait(cancellable, memory);
self.core_funcs.add(Some("waitable-set.wait"))
}
/// Declares a new `waitable-set.poll` intrinsic.
pub fn waitable_set_poll(&mut self, cancellable: bool, memory: u32) -> u32 {
self.canonical_functions()
.waitable_set_poll(cancellable, memory);
self.core_funcs.add(Some("waitable-set.poll"))
}
/// Declares a new `waitable-set.drop` intrinsic.
pub fn waitable_set_drop(&mut self) -> u32 {
self.canonical_functions().waitable_set_drop();
self.core_funcs.add(Some("waitable-set.drop"))
}
/// Declares a new `waitable.join` intrinsic.
pub fn waitable_join(&mut self) -> u32 {
self.canonical_functions().waitable_join();
self.core_funcs.add(Some("waitable.join"))
}
/// Declares a new `thread.index` intrinsic.
pub fn thread_index(&mut self) -> u32 {
self.canonical_functions().thread_index();
self.core_funcs.add(Some("thread.index"))
}
/// Declares a new `thread.new-indirect` intrinsic.
pub fn thread_new_indirect(&mut self, func_ty_idx: u32, table_index: u32) -> u32 {
self.canonical_functions()
.thread_new_indirect(func_ty_idx, table_index);
self.core_funcs.add(Some("thread.new-indirect"))
}
/// Declares a new `thread.switch-to` intrinsic.
pub fn thread_switch_to(&mut self, cancellable: bool) -> u32 {
self.canonical_functions().thread_switch_to(cancellable);
self.core_funcs.add(Some("thread.switch-to"))
}
/// Declares a new `thread.suspend` intrinsic.
pub fn thread_suspend(&mut self, cancellable: bool) -> u32 {
self.canonical_functions().thread_suspend(cancellable);
self.core_funcs.add(Some("thread.suspend"))
}
/// Declares a new `thread.resume-later` intrinsic.
pub fn thread_resume_later(&mut self) -> u32 {
self.canonical_functions().thread_resume_later();
self.core_funcs.add(Some("thread.resume-later"))
}
/// Declares a new `thread.yield-to` intrinsic.
pub fn thread_yield_to(&mut self, cancellable: bool) -> u32 {
self.canonical_functions().thread_yield_to(cancellable);
self.core_funcs.add(Some("thread.yield-to"))
}
/// Adds a new custom section to this component.
pub fn custom_section(&mut self, section: &CustomSection<'_>) {
self.flush();
self.component.section(section);
}
/// Adds a new custom section to this component.
pub fn raw_custom_section(&mut self, section: &[u8]) {
self.flush();
self.component.section(&RawCustomSection(section));
}
}
// Helper macro to generate methods on `ComponentBuilder` to get specific
// section encoders that automatically flush and write out prior sections as
// necessary.
macro_rules! section_accessors {
($($method:ident => $section:ident)*) => (
#[derive(Debug, Default)]
enum LastSection {
#[default]
None,
$($section($section),)*
}
impl ComponentBuilder {
$(
fn $method(&mut self) -> &mut $section {
match &self.last_section {
// The last encoded section matches the section that's
// being requested, so no change is necessary.
LastSection::$section(_) => {}
// Otherwise the last section didn't match this section,
// so flush any prior section if needed and start
// encoding the desired section of this method.
_ => {
self.flush();
self.last_section = LastSection::$section($section::new());
}
}
match &mut self.last_section {
LastSection::$section(ret) => ret,
_ => unreachable!()
}
}
)*
/// Writes out the last section into the final component binary if
/// there is a section specified, otherwise does nothing.
fn flush(&mut self) {
match mem::take(&mut self.last_section) {
LastSection::None => {}
$(
LastSection::$section(section) => {
self.component.section(§ion);
}
)*
}
}
}
)
}
section_accessors! {
component_instances => ComponentInstanceSection
instances => InstanceSection
canonical_functions => CanonicalFunctionSection
aliases => ComponentAliasSection
exports => ComponentExportSection
imports => ComponentImportSection
types => ComponentTypeSection
core_types => CoreTypeSection
}
#[derive(Debug, Default)]
struct Namespace {
count: u32,
names: NameMap,
}
impl Namespace {
fn add(&mut self, name: Option<&str>) -> u32 {
let ret = self.count;
self.count += 1;
if let Some(name) = name {
self.names.append(ret, name);
}
ret
}
}