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chore: checkpoint before Python removal

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Sienna Meridian Satterwhite
2026-03-26 22:33:59 +00:00
parent 683cec9307
commit e568ddf82a
29972 changed files with 11269302 additions and 2 deletions
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vendor/wit-bindgen-core/.cargo-checksum.json vendored Normal file
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Apache License
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defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

220
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
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outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
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on Your own behalf and on Your sole responsibility, not on behalf
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defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--- LLVM Exceptions to the Apache 2.0 License ----
As an exception, if, as a result of your compiling your source code, portions
of this Software are embedded into an Object form of such source code, you
may redistribute such embedded portions in such Object form without complying
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In addition, if you combine or link compiled forms of this Software with
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Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
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The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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use anyhow::{Result, bail};
use std::collections::HashSet;
use std::fmt;
use wit_parser::{Function, FunctionKind, Resolve, WorldKey};
/// Structure used to parse the command line argument `--async` consistently
/// across guest generators.
#[cfg_attr(feature = "clap", derive(clap::Parser))]
#[cfg_attr(feature = "serde", derive(serde::Deserialize))]
#[derive(Clone, Default, Debug)]
pub struct AsyncFilterSet {
/// Determines which functions to lift or lower `async`, if any.
///
/// This option can be passed multiple times and additionally accepts
/// comma-separated values for each option passed. Each individual argument
/// passed here can be one of:
///
/// - `all` - all imports and exports will be async
/// - `-all` - force all imports and exports to be sync
/// - `foo:bar/baz#method` - force this method to be async
/// - `import:foo:bar/baz#method` - force this method to be async, but only
/// as an import
/// - `-export:foo:bar/baz#method` - force this export to be sync
///
/// If a method is not listed in this option then the WIT's default bindings
/// mode will be used. If the WIT function is defined as `async` then async
/// bindings will be generated, otherwise sync bindings will be generated.
///
/// Options are processed in the order they are passed here, so if a method
/// matches two directives passed the least-specific one should be last.
#[cfg_attr(
feature = "clap",
arg(
long = "async",
value_parser = parse_async,
value_delimiter =',',
value_name = "FILTER",
),
)]
#[cfg_attr(feature = "serde", serde(rename = "async"))]
async_: Vec<Async>,
#[cfg_attr(feature = "clap", arg(skip))]
#[cfg_attr(feature = "serde", serde(skip))]
used_options: HashSet<usize>,
}
#[cfg(feature = "clap")]
fn parse_async(s: &str) -> Result<Async, String> {
Ok(Async::parse(s))
}
impl AsyncFilterSet {
/// Returns a set where all functions should be async or not depending on
/// `async_` provided.
pub fn all(async_: bool) -> AsyncFilterSet {
AsyncFilterSet {
async_: vec![Async {
enabled: async_,
filter: AsyncFilter::All,
}],
used_options: HashSet::new(),
}
}
/// Returns whether the `func` provided is to be bound `async` or not.
pub fn is_async(
&mut self,
resolve: &Resolve,
interface: Option<&WorldKey>,
func: &Function,
is_import: bool,
) -> bool {
let name_to_test = match interface {
Some(key) => format!("{}#{}", resolve.name_world_key(key), func.name),
None => func.name.clone(),
};
for (i, opt) in self.async_.iter().enumerate() {
let name = match &opt.filter {
AsyncFilter::All => {
self.used_options.insert(i);
return opt.enabled;
}
AsyncFilter::Function(s) => s,
AsyncFilter::Import(s) => {
if !is_import {
continue;
}
s
}
AsyncFilter::Export(s) => {
if is_import {
continue;
}
s
}
};
if *name == name_to_test {
self.used_options.insert(i);
return opt.enabled;
}
}
match &func.kind {
FunctionKind::Freestanding
| FunctionKind::Method(_)
| FunctionKind::Static(_)
| FunctionKind::Constructor(_) => false,
FunctionKind::AsyncFreestanding
| FunctionKind::AsyncMethod(_)
| FunctionKind::AsyncStatic(_) => true,
}
}
/// Intended to be used in the header comment of generated code to help
/// indicate what options were specified.
pub fn debug_opts(&self) -> impl Iterator<Item = String> + '_ {
self.async_.iter().map(|opt| opt.to_string())
}
/// Tests whether all `--async` options were used throughout bindings
/// generation, returning an error if any were unused.
pub fn ensure_all_used(&self) -> Result<()> {
for (i, opt) in self.async_.iter().enumerate() {
if self.used_options.contains(&i) {
continue;
}
if !matches!(opt.filter, AsyncFilter::All) {
bail!("unused async option: {opt}");
}
}
Ok(())
}
/// Returns whether any option explicitly requests that async is enabled.
pub fn any_enabled(&self) -> bool {
self.async_.iter().any(|o| o.enabled)
}
/// Pushes a new option into this set.
pub fn push(&mut self, directive: &str) {
self.async_.push(Async::parse(directive));
}
}
#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize))]
struct Async {
enabled: bool,
filter: AsyncFilter,
}
impl Async {
fn parse(s: &str) -> Async {
let (s, enabled) = match s.strip_prefix('-') {
Some(s) => (s, false),
None => (s, true),
};
let filter = match s {
"all" => AsyncFilter::All,
other => match other.strip_prefix("import:") {
Some(s) => AsyncFilter::Import(s.to_string()),
None => match other.strip_prefix("export:") {
Some(s) => AsyncFilter::Export(s.to_string()),
None => AsyncFilter::Function(s.to_string()),
},
},
};
Async { enabled, filter }
}
}
impl fmt::Display for Async {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if !self.enabled {
write!(f, "-")?;
}
self.filter.fmt(f)
}
}
#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize))]
enum AsyncFilter {
All,
Function(String),
Import(String),
Export(String),
}
impl fmt::Display for AsyncFilter {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
AsyncFilter::All => write!(f, "all"),
AsyncFilter::Function(s) => write!(f, "{s}"),
AsyncFilter::Import(s) => write!(f, "import:{s}"),
AsyncFilter::Export(s) => write!(f, "export:{s}"),
}
}
}

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vendor/wit-bindgen-core/src/lib.rs vendored Normal file
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use std::fmt::Write;
use anyhow::Result;
pub use wit_parser;
use wit_parser::*;
pub mod abi;
mod ns;
pub use ns::Ns;
pub mod source;
pub use source::{Files, Source};
mod types;
pub use types::{TypeInfo, Types};
mod path;
pub use path::name_package_module;
mod async_;
pub use async_::AsyncFilterSet;
#[derive(Default, Copy, Clone, PartialEq, Eq, Debug)]
pub enum Direction {
#[default]
Import,
Export,
}
pub trait WorldGenerator {
fn generate(&mut self, resolve: &Resolve, id: WorldId, files: &mut Files) -> Result<()> {
let world = &resolve.worlds[id];
self.preprocess(resolve, id);
fn unwrap_name(key: &WorldKey) -> &str {
match key {
WorldKey::Name(name) => name,
WorldKey::Interface(_) => panic!("unexpected interface key"),
}
}
let mut funcs = Vec::new();
let mut types = Vec::new();
for (name, import) in world.imports.iter() {
match import {
WorldItem::Function(f) => funcs.push((unwrap_name(name), f)),
WorldItem::Interface { id, .. } => {
self.import_interface(resolve, name, *id, files)?
}
WorldItem::Type(id) => types.push((unwrap_name(name), *id)),
}
}
if !types.is_empty() {
self.import_types(resolve, id, &types, files);
}
if !funcs.is_empty() {
self.import_funcs(resolve, id, &funcs, files);
}
funcs.clear();
self.finish_imports(resolve, id, files);
// First generate bindings for any freestanding functions, if any. If
// these refer to types defined in the world they need to refer to the
// imported types generated above.
//
// Interfaces are then generated afterwards so if the same interface is
// both imported and exported the right types are all used everywhere.
let mut interfaces = Vec::new();
for (name, export) in world.exports.iter() {
match export {
WorldItem::Function(f) => funcs.push((unwrap_name(name), f)),
WorldItem::Interface { id, .. } => interfaces.push((name, id)),
WorldItem::Type(_) => unreachable!(),
}
}
if !funcs.is_empty() {
self.export_funcs(resolve, id, &funcs, files)?;
}
self.pre_export_interface(resolve, files)?;
for (name, id) in interfaces {
self.export_interface(resolve, name, *id, files)?;
}
self.finish(resolve, id, files)
}
fn finish_imports(&mut self, resolve: &Resolve, world: WorldId, files: &mut Files) {
let _ = (resolve, world, files);
}
fn preprocess(&mut self, resolve: &Resolve, world: WorldId) {
let _ = (resolve, world);
}
fn import_interface(
&mut self,
resolve: &Resolve,
name: &WorldKey,
iface: InterfaceId,
files: &mut Files,
) -> Result<()>;
/// Called before any exported interfaces are generated.
fn pre_export_interface(&mut self, resolve: &Resolve, files: &mut Files) -> Result<()> {
let _ = (resolve, files);
Ok(())
}
fn export_interface(
&mut self,
resolve: &Resolve,
name: &WorldKey,
iface: InterfaceId,
files: &mut Files,
) -> Result<()>;
fn import_funcs(
&mut self,
resolve: &Resolve,
world: WorldId,
funcs: &[(&str, &Function)],
files: &mut Files,
);
fn export_funcs(
&mut self,
resolve: &Resolve,
world: WorldId,
funcs: &[(&str, &Function)],
files: &mut Files,
) -> Result<()>;
fn import_types(
&mut self,
resolve: &Resolve,
world: WorldId,
types: &[(&str, TypeId)],
files: &mut Files,
);
fn finish(&mut self, resolve: &Resolve, world: WorldId, files: &mut Files) -> Result<()>;
}
/// This is a possible replacement for the `Generator` trait above, currently
/// only used by the JS bindings for generating bindings for a component.
///
/// The current plan is to see how things shake out with worlds and various
/// other generators to see if everything can be updated to a less
/// per-`*.wit`-file centric interface in the future. Even this will probably
/// change for JS though. In any case it's something that was useful for JS and
/// is suitable to replace otherwise at any time.
pub trait InterfaceGenerator<'a> {
fn resolve(&self) -> &'a Resolve;
fn type_record(&mut self, id: TypeId, name: &str, record: &Record, docs: &Docs);
fn type_resource(&mut self, id: TypeId, name: &str, docs: &Docs);
fn type_flags(&mut self, id: TypeId, name: &str, flags: &Flags, docs: &Docs);
fn type_tuple(&mut self, id: TypeId, name: &str, tuple: &Tuple, docs: &Docs);
fn type_variant(&mut self, id: TypeId, name: &str, variant: &Variant, docs: &Docs);
fn type_option(&mut self, id: TypeId, name: &str, payload: &Type, docs: &Docs);
fn type_result(&mut self, id: TypeId, name: &str, result: &Result_, docs: &Docs);
fn type_enum(&mut self, id: TypeId, name: &str, enum_: &Enum, docs: &Docs);
fn type_alias(&mut self, id: TypeId, name: &str, ty: &Type, docs: &Docs);
fn type_list(&mut self, id: TypeId, name: &str, ty: &Type, docs: &Docs);
fn type_builtin(&mut self, id: TypeId, name: &str, ty: &Type, docs: &Docs);
fn type_future(&mut self, id: TypeId, name: &str, ty: &Option<Type>, docs: &Docs);
fn type_stream(&mut self, id: TypeId, name: &str, ty: &Option<Type>, docs: &Docs);
fn types(&mut self, iface: InterfaceId) {
let iface = &self.resolve().interfaces[iface];
for (name, id) in iface.types.iter() {
self.define_type(name, *id);
}
}
fn define_type(&mut self, name: &str, id: TypeId) {
let ty = &self.resolve().types[id];
match &ty.kind {
TypeDefKind::Record(record) => self.type_record(id, name, record, &ty.docs),
TypeDefKind::Resource => self.type_resource(id, name, &ty.docs),
TypeDefKind::Flags(flags) => self.type_flags(id, name, flags, &ty.docs),
TypeDefKind::Tuple(tuple) => self.type_tuple(id, name, tuple, &ty.docs),
TypeDefKind::Enum(enum_) => self.type_enum(id, name, enum_, &ty.docs),
TypeDefKind::Variant(variant) => self.type_variant(id, name, variant, &ty.docs),
TypeDefKind::Option(t) => self.type_option(id, name, t, &ty.docs),
TypeDefKind::Result(r) => self.type_result(id, name, r, &ty.docs),
TypeDefKind::List(t) => self.type_list(id, name, t, &ty.docs),
TypeDefKind::Type(t) => self.type_alias(id, name, t, &ty.docs),
TypeDefKind::Future(t) => self.type_future(id, name, t, &ty.docs),
TypeDefKind::Stream(t) => self.type_stream(id, name, t, &ty.docs),
TypeDefKind::Handle(_) => panic!("handle types do not require definition"),
TypeDefKind::FixedSizeList(..) => todo!(),
TypeDefKind::Map(..) => todo!(),
TypeDefKind::Unknown => unreachable!(),
}
}
}
pub trait AnonymousTypeGenerator<'a> {
fn resolve(&self) -> &'a Resolve;
fn anonymous_type_handle(&mut self, id: TypeId, handle: &Handle, docs: &Docs);
fn anonymous_type_tuple(&mut self, id: TypeId, ty: &Tuple, docs: &Docs);
fn anonymous_type_option(&mut self, id: TypeId, ty: &Type, docs: &Docs);
fn anonymous_type_result(&mut self, id: TypeId, ty: &Result_, docs: &Docs);
fn anonymous_type_list(&mut self, id: TypeId, ty: &Type, docs: &Docs);
fn anonymous_type_future(&mut self, id: TypeId, ty: &Option<Type>, docs: &Docs);
fn anonymous_type_stream(&mut self, id: TypeId, ty: &Option<Type>, docs: &Docs);
fn anonymous_type_type(&mut self, id: TypeId, ty: &Type, docs: &Docs);
fn define_anonymous_type(&mut self, id: TypeId) {
let ty = &self.resolve().types[id];
match &ty.kind {
TypeDefKind::Flags(_)
| TypeDefKind::Record(_)
| TypeDefKind::Resource
| TypeDefKind::Enum(_)
| TypeDefKind::Variant(_) => {
unreachable!()
}
TypeDefKind::Type(t) => self.anonymous_type_type(id, t, &ty.docs),
TypeDefKind::Tuple(tuple) => self.anonymous_type_tuple(id, tuple, &ty.docs),
TypeDefKind::Option(t) => self.anonymous_type_option(id, t, &ty.docs),
TypeDefKind::Result(r) => self.anonymous_type_result(id, r, &ty.docs),
TypeDefKind::List(t) => self.anonymous_type_list(id, t, &ty.docs),
TypeDefKind::Future(f) => self.anonymous_type_future(id, f, &ty.docs),
TypeDefKind::Stream(s) => self.anonymous_type_stream(id, s, &ty.docs),
TypeDefKind::Handle(handle) => self.anonymous_type_handle(id, handle, &ty.docs),
TypeDefKind::FixedSizeList(..) => todo!(),
TypeDefKind::Map(..) => todo!(),
TypeDefKind::Unknown => unreachable!(),
}
}
}
pub fn generated_preamble(src: &mut Source, version: &str) {
uwriteln!(src, "// Generated by `wit-bindgen` {version}. DO NOT EDIT!")
}
pub fn dealias(resolve: &Resolve, mut id: TypeId) -> TypeId {
loop {
match &resolve.types[id].kind {
TypeDefKind::Type(Type::Id(that_id)) => id = *that_id,
_ => break id,
}
}
}

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use std::collections::HashSet;
#[derive(Default)]
pub struct Ns {
defined: HashSet<String>,
tmp: usize,
}
impl Ns {
pub fn insert(&mut self, name: &str) -> Result<(), String> {
if self.defined.insert(name.to_string()) {
Ok(())
} else {
Err(format!("name `{name}` already defined"))
}
}
pub fn tmp(&mut self, name: &str) -> String {
let mut ret = name.to_string();
while self.defined.contains(&ret) {
ret = format!("{}{}", name, self.tmp);
self.tmp += 1;
}
self.defined.insert(ret.clone());
ret
}
}

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use heck::ToSnakeCase;
use wit_parser::{PackageId, Resolve};
/// If the package `id` is the only package with its namespace/name combo
/// then pass through the name unmodified. If, however, there are multiple
/// versions of this package then the package module is going to get version
/// information.
pub fn name_package_module(resolve: &Resolve, id: PackageId) -> String {
let pkg = &resolve.packages[id];
let versions_with_same_name = resolve
.packages
.iter()
.filter_map(|(_, p)| {
if p.name.namespace == pkg.name.namespace && p.name.name == pkg.name.name {
Some(&p.name.version)
} else {
None
}
})
.collect::<Vec<_>>();
let base = pkg.name.name.to_snake_case();
if versions_with_same_name.len() == 1 {
return base;
}
let version = match &pkg.name.version {
Some(version) => version,
// If this package didn't have a version then don't mangle its name
// and other packages with the same name but with versions present
// will have their names mangled.
None => return base,
};
// Here there's multiple packages with the same name that differ only in
// version, so the version needs to be mangled into the Rust module name
// that we're generating. This in theory could look at all of
// `versions_with_same_name` and produce a minimal diff, e.g. for 0.1.0
// and 0.2.0 this could generate "foo1" and "foo2", but for now
// a simpler path is chosen to generate "foo0_1_0" and "foo0_2_0".
let version = version
.to_string()
.replace('.', "_")
.replace('-', "_")
.replace('+', "_")
.to_snake_case();
format!("{base}{version}")
}

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use std::collections::BTreeMap;
use std::collections::btree_map::Entry;
use std::fmt::{self, Write};
use std::ops::Deref;
#[derive(Default)]
pub struct Files {
files: BTreeMap<String, Vec<u8>>,
}
impl Files {
pub fn push(&mut self, name: &str, contents: &[u8]) {
match self.files.entry(name.to_owned()) {
Entry::Vacant(entry) => {
entry.insert(contents.to_owned());
}
Entry::Occupied(ref mut entry) => {
entry.get_mut().extend_from_slice(contents);
}
}
}
pub fn get_size(&mut self, name: &str) -> Option<usize> {
self.files.get(name).map(|data| data.len())
}
pub fn remove(&mut self, name: &str) -> Option<Vec<u8>> {
self.files.remove(name)
}
pub fn iter(&self) -> impl Iterator<Item = (&'_ str, &'_ [u8])> {
self.files.iter().map(|p| (p.0.as_str(), p.1.as_slice()))
}
}
#[derive(Default)]
pub struct Source {
s: String,
indent: usize,
in_line_comment: bool,
continuing_line: bool,
}
impl Source {
pub fn append_src(&mut self, src: &Source) {
self.s.push_str(&src.s);
self.indent += src.indent;
self.in_line_comment = src.in_line_comment;
}
pub fn push_str(&mut self, src: &str) {
let lines = src.lines().collect::<Vec<_>>();
for (i, line) in lines.iter().enumerate() {
if !self.continuing_line {
if !line.is_empty() {
for _ in 0..self.indent {
self.s.push_str(" ");
}
}
self.continuing_line = true;
}
let trimmed = line.trim();
if trimmed.starts_with("//") {
self.in_line_comment = true;
}
if !self.in_line_comment {
if trimmed.starts_with('}') && self.s.ends_with(" ") {
self.s.pop();
self.s.pop();
}
}
self.s.push_str(if lines.len() == 1 {
line
} else {
line.trim_start()
});
if !self.in_line_comment {
if trimmed.ends_with('{') {
self.indent += 1;
}
if trimmed.starts_with('}') {
// Note that a `saturating_sub` is used here to prevent a panic
// here in the case of invalid code being generated in debug
// mode. It's typically easier to debug those issues through
// looking at the source code rather than getting a panic.
self.indent = self.indent.saturating_sub(1);
}
}
if i != lines.len() - 1 || src.ends_with('\n') {
self.newline();
}
}
}
pub fn indent(&mut self, amt: usize) {
self.indent += amt;
}
pub fn deindent(&mut self, amt: usize) {
self.indent -= amt;
}
/// Set the indentation level, and return the old level.
pub fn set_indent(&mut self, amt: usize) -> usize {
let old = self.indent;
self.indent = amt;
old
}
fn newline(&mut self) {
self.in_line_comment = false;
self.continuing_line = false;
self.s.push('\n');
}
pub fn as_mut_string(&mut self) -> &mut String {
&mut self.s
}
pub fn as_str(&self) -> &str {
&self.s
}
}
impl Write for Source {
fn write_str(&mut self, s: &str) -> fmt::Result {
self.push_str(s);
Ok(())
}
}
impl Deref for Source {
type Target = str;
fn deref(&self) -> &str {
&self.s
}
}
impl From<Source> for String {
fn from(s: Source) -> String {
s.s
}
}
/// Calls [`write!`] with the passed arguments and unwraps the result.
///
/// Useful for writing to things with infallible `Write` implementations like
/// `Source` and `String`.
///
/// [`write!`]: std::write
#[macro_export]
macro_rules! uwrite {
($dst:expr, $($arg:tt)*) => {
write!($dst, $($arg)*).unwrap()
};
}
/// Calls [`writeln!`] with the passed arguments and unwraps the result.
///
/// Useful for writing to things with infallible `Write` implementations like
/// `Source` and `String`.
///
/// [`writeln!`]: std::writeln
#[macro_export]
macro_rules! uwriteln {
($dst:expr, $($arg:tt)*) => {
writeln!($dst, $($arg)*).unwrap()
};
}
#[cfg(test)]
mod tests {
use super::Source;
#[test]
fn simple_append() {
let mut s = Source::default();
s.push_str("x");
assert_eq!(s.s, "x");
s.push_str("y");
assert_eq!(s.s, "xy");
s.push_str("z ");
assert_eq!(s.s, "xyz ");
s.push_str(" a ");
assert_eq!(s.s, "xyz a ");
s.push_str("\na");
assert_eq!(s.s, "xyz a \na");
}
#[test]
fn newline_remap() {
let mut s = Source::default();
s.push_str("function() {\n");
s.push_str("y\n");
s.push_str("}\n");
assert_eq!(s.s, "function() {\n y\n}\n");
}
#[test]
fn if_else() {
let mut s = Source::default();
s.push_str("if() {\n");
s.push_str("y\n");
s.push_str("} else if () {\n");
s.push_str("z\n");
s.push_str("}\n");
assert_eq!(s.s, "if() {\n y\n} else if () {\n z\n}\n");
}
#[test]
fn trim_ws() {
let mut s = Source::default();
s.push_str(
"function() {
x
}",
);
assert_eq!(s.s, "function() {\n x\n}");
}
}

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use std::collections::HashMap;
use wit_parser::*;
#[derive(Default)]
pub struct Types {
type_info: HashMap<TypeId, TypeInfo>,
}
#[derive(Default, Clone, Copy, Debug)]
pub struct TypeInfo {
/// Whether this type is ever used (transitively) within the
/// parameter of an imported function.
///
/// This means that it's used in a context where ownership isn't
/// relinquished.
pub borrowed: bool,
/// Whether this type is ever used (transitively) within the
/// parameter or result of an export, or the result of an import.
///
/// This means that it's used in a context where ownership is required and
/// memory management is necessary.
pub owned: bool,
/// Whether this type is ever used (transitively) within the
/// error case in the result of a function.
pub error: bool,
/// Whether this type (transitively) has a list (or string).
pub has_list: bool,
/// Whether this type (transitively) has a tuple.
pub has_tuple: bool,
/// Whether this type (transitively) has a resource (or handle).
pub has_resource: bool,
/// Whether this type (transitively) has a borrow handle.
pub has_borrow_handle: bool,
/// Whether this type (transitively) has an own handle.
pub has_own_handle: bool,
}
impl std::ops::BitOrAssign for TypeInfo {
fn bitor_assign(&mut self, rhs: Self) {
self.borrowed |= rhs.borrowed;
self.owned |= rhs.owned;
self.error |= rhs.error;
self.has_list |= rhs.has_list;
self.has_tuple |= rhs.has_tuple;
self.has_resource |= rhs.has_resource;
self.has_borrow_handle |= rhs.has_borrow_handle;
self.has_own_handle |= rhs.has_own_handle;
}
}
impl TypeInfo {
pub fn is_clone(&self) -> bool {
!self.has_resource
}
pub fn is_copy(&self) -> bool {
!self.has_list && !self.has_resource
}
}
impl Types {
pub fn analyze(&mut self, resolve: &Resolve) {
for (t, _) in resolve.types.iter() {
self.type_id_info(resolve, t);
}
for (_, world) in resolve.worlds.iter() {
for (import, (_, item)) in world
.imports
.iter()
.map(|i| (true, i))
.chain(world.exports.iter().map(|i| (false, i)))
{
match item {
WorldItem::Function(f) => {
self.type_info_func(resolve, f, import);
}
WorldItem::Interface { id, stability: _ } => {
for (_, f) in resolve.interfaces[*id].functions.iter() {
self.type_info_func(resolve, f, import);
}
}
WorldItem::Type(_) => {}
}
}
}
}
fn type_info_func(&mut self, resolve: &Resolve, func: &Function, import: bool) {
let mut live = LiveTypes::default();
for (_, ty) in func.params.iter() {
self.type_info(resolve, ty);
live.add_type(resolve, ty);
}
for id in live.iter() {
if resolve.types[id].name.is_some() {
let info = self.type_info.get_mut(&id).unwrap();
if import {
info.borrowed = true;
} else {
info.owned = true;
}
}
}
let mut live = LiveTypes::default();
if let Some(ty) = &func.result {
self.type_info(resolve, ty);
live.add_type(resolve, ty);
}
for id in live.iter() {
if resolve.types[id].name.is_some() {
self.type_info.get_mut(&id).unwrap().owned = true;
}
}
if let Some(Type::Id(id)) = func.result {
let err = match &resolve.types[id].kind {
TypeDefKind::Result(Result_ { err, .. }) => err,
_ => return,
};
if let Some(Type::Id(id)) = err {
// When an interface `use`s a type from another interface, it creates a new typeid
// referring to the definition typeid. Chase any chain of references down to the
// typeid of the definition.
fn resolve_type_definition_id(resolve: &Resolve, mut id: TypeId) -> TypeId {
loop {
match resolve.types[id].kind {
TypeDefKind::Type(Type::Id(def_id)) => id = def_id,
_ => return id,
}
}
}
let id = resolve_type_definition_id(resolve, *id);
self.type_info.get_mut(&id).unwrap().error = true;
}
}
}
pub fn get(&self, id: TypeId) -> TypeInfo {
self.type_info[&id]
}
pub fn type_id_info(&mut self, resolve: &Resolve, ty: TypeId) -> TypeInfo {
if let Some(info) = self.type_info.get(&ty) {
return *info;
}
let mut info = TypeInfo::default();
match &resolve.types[ty].kind {
TypeDefKind::Record(r) => {
for field in r.fields.iter() {
info |= self.type_info(resolve, &field.ty);
}
}
TypeDefKind::Resource => {
info.has_resource = true;
}
TypeDefKind::Handle(handle) => {
match handle {
Handle::Borrow(_) => info.has_borrow_handle = true,
Handle::Own(_) => info.has_own_handle = true,
}
info.has_resource = true;
}
TypeDefKind::Tuple(t) => {
for ty in t.types.iter() {
info |= self.type_info(resolve, ty);
}
info.has_tuple = true;
}
TypeDefKind::Flags(_) => {}
TypeDefKind::Enum(_) => {}
TypeDefKind::Variant(v) => {
for case in v.cases.iter() {
info |= self.optional_type_info(resolve, case.ty.as_ref());
}
}
TypeDefKind::List(ty) => {
info = self.type_info(resolve, ty);
info.has_list = true;
}
TypeDefKind::Type(ty) => {
info = self.type_info(resolve, ty);
}
TypeDefKind::Option(ty) => {
info = self.type_info(resolve, ty);
}
TypeDefKind::Result(r) => {
info = self.optional_type_info(resolve, r.ok.as_ref());
info |= self.optional_type_info(resolve, r.err.as_ref());
}
TypeDefKind::Future(_) | TypeDefKind::Stream(_) => {
// These are all u32 handles regardless of payload type, so no
// need to recurse.
info.has_resource = true;
// Flag these as being onwed handles as lowering these values
// should use the same ownership semantics as `own<T>`
info.has_own_handle = true;
}
TypeDefKind::FixedSizeList(..) => todo!(),
TypeDefKind::Map(..) => todo!(),
TypeDefKind::Unknown => unreachable!(),
}
let prev = self.type_info.insert(ty, info);
assert!(prev.is_none());
info
}
pub fn type_info(&mut self, resolve: &Resolve, ty: &Type) -> TypeInfo {
let mut info = TypeInfo::default();
match ty {
Type::String => info.has_list = true,
Type::ErrorContext => info.has_resource = true,
Type::Id(id) => return self.type_id_info(resolve, *id),
_ => {}
}
info
}
fn optional_type_info(&mut self, resolve: &Resolve, ty: Option<&Type>) -> TypeInfo {
match ty {
Some(ty) => self.type_info(resolve, ty),
None => TypeInfo::default(),
}
}
}

0
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{"name":"wit-bindgen-core","vers":"0.51.0","deps":[{"name":"anyhow","req":"^1.0.72","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"clap","req":"^4.3.19","features":["derive"],"optional":true,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"heck","req":"^0.5","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"serde","req":"^1.0.218","features":["derive"],"optional":true,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"wit-parser","req":"^0.244.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false}],"features":{"clap":["dep:clap"],"serde":["dep:serde"]},"features2":null,"cksum":"2e5cfc90faee5f9da7fcd4aa5abbd6288760c2674db68cb12452d868b8b5f454","yanked":null,"links":null,"rust_version":null,"v":2}

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