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fixed conflict

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This commit is contained in:
T5uku5hi 2019-02-03 13:49:42 +09:00
commit 223054811d
24 changed files with 433 additions and 74 deletions
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1
crates/backend/src/ast.rs
View File

@ -207,6 +207,7 @@ pub struct Enum {
pub name: Ident,
pub variants: Vec<Variant>,
pub comments: Vec<String>,
pub hole: u32,
}
#[cfg_attr(feature = "extra-traits", derive(Debug, PartialEq, Eq))]

13
crates/backend/src/codegen.rs
View File

@ -1038,6 +1038,7 @@ impl<'a> ToTokens for DescribeImport<'a> {
impl ToTokens for ast::Enum {
fn to_tokens(&self, into: &mut TokenStream) {
let enum_name = &self.name;
let hole = &self.hole;
let cast_clauses = self.variants.iter().map(|variant| {
let variant_name = &variant.name;
quote! {
@ -1061,6 +1062,7 @@ impl ToTokens for ast::Enum {
type Abi = u32;
#[allow(clippy::*)]
#[inline]
unsafe fn from_abi(
js: u32,
_extra: &mut ::wasm_bindgen::convert::Stack,
@ -1071,11 +1073,22 @@ impl ToTokens for ast::Enum {
}
}
impl ::wasm_bindgen::convert::OptionFromWasmAbi for #enum_name {
#[inline]
fn is_none(val: &u32) -> bool { *val == #hole }
}
impl ::wasm_bindgen::convert::OptionIntoWasmAbi for #enum_name {
#[inline]
fn none() -> Self::Abi { #hole }
}
impl ::wasm_bindgen::describe::WasmDescribe for #enum_name {
#[allow(clippy::*)]
fn describe() {
use wasm_bindgen::describe::*;
inform(ENUM);
inform(#hole);
}
}
})

6
crates/cli-support/src/descriptor.rs
View File

@ -59,7 +59,7 @@ pub enum Descriptor {
Vector(Box<Descriptor>),
String,
Anyref,
Enum,
Enum { hole: u32 },
RustStruct(String),
Char,
Option(Box<Descriptor>),
@ -128,7 +128,7 @@ impl Descriptor {
OPTIONAL => Descriptor::Option(Box::new(Descriptor::_decode(data))),
STRING => Descriptor::String,
ANYREF => Descriptor::Anyref,
ENUM => Descriptor::Enum,
ENUM => Descriptor::Enum { hole: get(data) },
RUST_STRUCT => {
let name = (0..get(data))
.map(|_| char::from_u32(get(data)).unwrap())
@ -159,7 +159,7 @@ impl Descriptor {
| Descriptor::U32
| Descriptor::F32
| Descriptor::F64
| Descriptor::Enum => true,
| Descriptor::Enum { .. } => true,
_ => return false,
}
}

24
crates/cli-support/src/js/js2rust.rs
View File

@ -306,6 +306,14 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
.push(format!("isLikeNone({0}) ? 0 : {0}.codePointAt(0)", name));
return Ok(self);
}
Descriptor::Enum { hole } => {
self.cx.expose_is_like_none();
self.js_arguments
.push((name.clone(), "number | undefined".to_string()));
self.rust_arguments
.push(format!("isLikeNone({0}) ? {1} : {0}", name, hole));
return Ok(self);
}
_ => bail!(
"unsupported optional argument type for calling Rust function from JS: {:?}",
arg
@ -609,6 +617,14 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
.to_string();
return Ok(self);
}
Descriptor::Enum { hole } => {
self.ret_ty = "number | undefined".to_string();
self.ret_expr = format!("
const ret = RET;
return ret === {} ? undefined : ret;
", hole);
return Ok(self);
}
_ => bail!(
"unsupported optional return type for calling Rust function from JS: {:?}",
ty
@ -734,12 +750,16 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
.map(|s| format!("{}: {}", s.0, s.1))
.collect::<Vec<_>>()
.join(", ");
let mut ts = format!("{} {}({})", prefix, self.js_name, ts_args);
let mut ts = if prefix.is_empty() {
format!("{}({})", self.js_name, ts_args)
} else {
format!("{} {}({})", prefix, self.js_name, ts_args)
};
if self.constructor.is_none() {
ts.push_str(": ");
ts.push_str(&self.ret_ty);
}
ts.push_str(";\n");
ts.push(';');
(js, ts, self.js_doc_comments())
}
}

14
crates/cli-support/src/js/mod.rs
View File

@ -845,7 +845,7 @@ impl<'a> Context<'a> {
",
name,
));
ts_dst.push_str("free(): void;\n");
ts_dst.push_str(" free(): void;");
dst.push_str(&class.contents);
ts_dst.push_str(&class.typescript);
dst.push_str("}\n");
@ -2399,6 +2399,8 @@ impl<'a, 'b> SubContext<'a, 'b> {
.contents
.push_str(&format_doc_comments(&export.comments, Some(js_doc)));
class.typescript.push_str(" "); // Indentation
if export.is_constructor {
if class.has_constructor {
bail!("found duplicate constructor `{}`", export.function.name);
@ -2571,12 +2573,12 @@ impl<'a, 'b> SubContext<'a, 'b> {
.typescript
.push_str(&format!("export enum {} {{", enum_.name));
variants.clear();
for variant in enum_.variants.iter() {
variants.push_str(&format!("{},", variant.name));
self.cx
.typescript
.push_str(&format!("\n {},", variant.name));
}
self.cx.typescript.push_str(&variants);
self.cx.typescript.push_str("}\n");
self.cx.typescript.push_str("\n}\n");
}
fn generate_struct(&mut self, struct_: &decode::Struct) -> Result<(), Error> {
@ -2596,7 +2598,7 @@ impl<'a, 'b> SubContext<'a, 'b> {
.argument(&descriptor)?
.ret(&Descriptor::Unit)?;
ts_dst.push_str(&format!(
"{}{}: {};\n",
"\n {}{}: {};",
if field.readonly { "readonly " } else { "" },
field.name,
&cx.js_arguments[0].1

13
crates/cli-support/src/js/rust2js.rs
View File

@ -200,6 +200,11 @@ impl<'a, 'b> Rust2Js<'a, 'b> {
.push(format!("{0} === 0xFFFFFF ? undefined : {0} !== 0", abi));
return Ok(());
}
Descriptor::Enum { hole } => {
self.js_arguments
.push(format!("{0} === {1} ? undefined : {0}", abi, hole));
return Ok(());
}
Descriptor::Char => {
let value = self.shim_argument();
self.js_arguments.push(format!(
@ -441,6 +446,14 @@ impl<'a, 'b> Rust2Js<'a, 'b> {
.to_string();
return Ok(());
}
Descriptor::Enum { hole } => {
self.cx.expose_is_like_none();
self.ret_expr = format!("
const val = JS;
return isLikeNone(val) ? {} : val;
", hole);
return Ok(());
}
_ => bail!(
"unsupported optional return type for calling JS function from Rust: {:?}",
ty

2
crates/js-sys/src/lib.rs
View File

@ -4841,7 +4841,7 @@ macro_rules! arrays {
/// Additionally the returned object can be safely mutated but the
/// input slice isn't guaranteed to be mutable.
///
/// Finally, the returned objet is disconnected from the input
/// Finally, the returned object is disconnected from the input
/// slice's lifetime, so there's no guarantee that the data is read
/// at the right time.
pub unsafe fn view(rust: &[$ty]) -> $name {

68
crates/macro-support/src/lib.rs
View File

@ -13,8 +13,11 @@ extern crate wasm_bindgen_shared as shared;
use backend::{Diagnostic, TryToTokens};
pub use parser::BindgenAttrs;
use quote::ToTokens;
use parser::MacroParse;
use proc_macro2::TokenStream;
use syn::parse::{Parse, ParseStream, Result as SynResult};
use quote::TokenStreamExt;
mod parser;
@ -36,3 +39,68 @@ pub fn expand(attr: TokenStream, input: TokenStream) -> Result<TokenStream, Diag
Ok(tokens)
}
/// Takes the parsed input from a `#[wasm_bindgen]` macro and returns the generated bindings
pub fn expand_class_marker(attr: TokenStream, input: TokenStream) -> Result<TokenStream, Diagnostic> {
parser::reset_attrs_used();
let mut item = syn::parse2::<syn::ImplItemMethod>(input)?;
let opts: ClassMarker = syn::parse2(attr)?;
let mut program = backend::ast::Program::default();
item.macro_parse(&mut program, (&opts.class, &opts.js_class))?;
parser::assert_all_attrs_checked(); // same as above
// This is where things are slightly different, we are being expanded in the
// context of an impl so we can't inject arbitrary item-like tokens into the
// output stream. If we were to do that then it wouldn't parse!
//
// Instead what we want to do is to generate the tokens for `program` into
// the header of the function. This'll inject some no_mangle functions and
// statics and such, and they should all be valid in the context of the
// start of a function.
//
// We manually implement `ToTokens for ImplItemMethod` here, injecting our
// program's tokens before the actual method's inner body tokens.
let mut tokens = proc_macro2::TokenStream::new();
tokens.append_all(item.attrs.iter().filter(|attr| {
match attr.style {
syn::AttrStyle::Outer => true,
_ => false,
}
}));
item.vis.to_tokens(&mut tokens);
item.sig.to_tokens(&mut tokens);
let mut err = None;
item.block.brace_token.surround(&mut tokens, |tokens| {
if let Err(e) = program.try_to_tokens(tokens) {
err = Some(e);
}
tokens.append_all(item.attrs.iter().filter(|attr| {
match attr.style {
syn::AttrStyle::Inner(_) => true,
_ => false,
}
}));
tokens.append_all(&item.block.stmts);
});
if let Some(err) = err {
return Err(err)
}
Ok(tokens)
}
struct ClassMarker {
class: syn::Ident,
js_class: String,
}
impl Parse for ClassMarker {
fn parse(input: ParseStream) -> SynResult<Self> {
let class = input.parse::<syn::Ident>()?;
input.parse::<Token![=]>()?;
let js_class = input.parse::<syn::LitStr>()?.value();
Ok(ClassMarker { class, js_class })
}
}

151
crates/macro-support/src/parser.rs
View File

@ -796,7 +796,7 @@ impl<'a> MacroParse<(Option<BindgenAttrs>, &'a mut TokenStream)> for syn::Item {
}
impl<'a> MacroParse<BindgenAttrs> for &'a mut syn::ItemImpl {
fn macro_parse(self, program: &mut ast::Program, opts: BindgenAttrs) -> Result<(), Diagnostic> {
fn macro_parse(self, _program: &mut ast::Program, opts: BindgenAttrs) -> Result<(), Diagnostic> {
if self.defaultness.is_some() {
bail_span!(
self.defaultness,
@ -830,7 +830,7 @@ impl<'a> MacroParse<BindgenAttrs> for &'a mut syn::ItemImpl {
};
let mut errors = Vec::new();
for item in self.items.iter_mut() {
if let Err(e) = (&name, item).macro_parse(program, &opts) {
if let Err(e) = prepare_for_impl_recursion(item, &name, &opts) {
errors.push(e);
}
}
@ -840,77 +840,106 @@ impl<'a> MacroParse<BindgenAttrs> for &'a mut syn::ItemImpl {
}
}
impl<'a, 'b> MacroParse<&'a BindgenAttrs> for (&'a Ident, &'b mut syn::ImplItem) {
// Prepare for recursion into an `impl` block. Here we want to attach an
// internal attribute, `__wasm_bindgen_class_marker`, with any metadata we need
// to pass from the impl to the impl item. Recursive macro expansion will then
// expand the `__wasm_bindgen_class_marker` attribute.
//
// Note that we currently do this because inner items may have things like cfgs
// on them, so we want to expand the impl first, let the insides get cfg'd, and
// then go for the rest.
fn prepare_for_impl_recursion(
item: &mut syn::ImplItem,
class: &Ident,
impl_opts: &BindgenAttrs
) -> Result<(), Diagnostic> {
let method = match item {
syn::ImplItem::Method(m) => m,
syn::ImplItem::Const(_) => {
bail_span!(
&*item,
"const definitions aren't supported with #[wasm_bindgen]"
);
}
syn::ImplItem::Type(_) => bail_span!(
&*item,
"type definitions in impls aren't supported with #[wasm_bindgen]"
),
syn::ImplItem::Existential(_) => bail_span!(
&*item,
"existentials in impls aren't supported with #[wasm_bindgen]"
),
syn::ImplItem::Macro(_) => {
// In theory we want to allow this, but we have no way of expanding
// the macro and then placing our magical attributes on the expanded
// functions. As a result, just disallow it for now to hopefully
// ward off buggy results from this macro.
bail_span!(&*item, "macros in impls aren't supported");
}
syn::ImplItem::Verbatim(_) => panic!("unparsed impl item?"),
};
let js_class = impl_opts
.js_class()
.map(|s| s.0.to_string())
.unwrap_or(class.to_string());
method.attrs.insert(0, syn::Attribute {
pound_token: Default::default(),
style: syn::AttrStyle::Outer,
bracket_token: Default::default(),
path: syn::Ident::new("__wasm_bindgen_class_marker", Span::call_site()).into(),
tts: quote::quote! { (#class = #js_class) }.into(),
});
Ok(())
}
impl<'a, 'b> MacroParse<(&'a Ident, &'a str)> for &'b mut syn::ImplItemMethod {
fn macro_parse(
self,
program: &mut ast::Program,
impl_opts: &'a BindgenAttrs,
(class, js_class): (&'a Ident, &'a str),
) -> Result<(), Diagnostic> {
let (class, item) = self;
let method = match item {
syn::ImplItem::Method(ref mut m) => m,
syn::ImplItem::Const(_) => {
bail_span!(
&*item,
"const definitions aren't supported with #[wasm_bindgen]"
);
}
syn::ImplItem::Type(_) => bail_span!(
&*item,
"type definitions in impls aren't supported with #[wasm_bindgen]"
),
syn::ImplItem::Existential(_) => bail_span!(
&*item,
"existentials in impls aren't supported with #[wasm_bindgen]"
),
syn::ImplItem::Macro(_) => {
bail_span!(&*item, "macros in impls aren't supported");
}
syn::ImplItem::Verbatim(_) => panic!("unparsed impl item?"),
};
match method.vis {
match self.vis {
syn::Visibility::Public(_) => {}
_ => return Ok(()),
}
if method.defaultness.is_some() {
if self.defaultness.is_some() {
panic!("default methods are not supported");
}
if method.sig.constness.is_some() {
if self.sig.constness.is_some() {
bail_span!(
method.sig.constness,
self.sig.constness,
"can only #[wasm_bindgen] non-const functions",
);
}
if method.sig.unsafety.is_some() {
bail_span!(method.sig.unsafety, "can only bindgen safe functions",);
if self.sig.unsafety.is_some() {
bail_span!(self.sig.unsafety, "can only bindgen safe functions",);
}
let opts = BindgenAttrs::find(&mut method.attrs)?;
let comments = extract_doc_comments(&method.attrs);
let opts = BindgenAttrs::find(&mut self.attrs)?;
let comments = extract_doc_comments(&self.attrs);
let is_constructor = opts.constructor().is_some();
let (function, method_self) = function_from_decl(
&method.sig.ident,
&self.sig.ident,
&opts,
Box::new(method.sig.decl.clone()),
method.attrs.clone(),
method.vis.clone(),
Box::new(self.sig.decl.clone()),
self.attrs.clone(),
self.vis.clone(),
true,
Some(class),
)?;
let js_class = impl_opts
.js_class()
.map(|s| s.0.to_string())
.unwrap_or(class.to_string());
program.exports.push(ast::Export {
rust_class: Some(class.clone()),
js_class: Some(js_class),
js_class: Some(js_class.to_string()),
method_self,
is_constructor,
function,
comments,
start: false,
rust_name: method.sig.ident.clone(),
rust_name: self.sig.ident.clone(),
});
opts.check_used()?;
Ok(())
@ -924,6 +953,12 @@ impl MacroParse<()> for syn::ItemEnum {
_ => bail_span!(self, "only public enums are allowed with #[wasm_bindgen]"),
}
if self.variants.len() == 0 {
bail_span!(self, "cannot export empty enums to JS");
}
let has_discriminant = self.variants[0].discriminant.is_some();
let variants = self
.variants
.iter()
@ -933,6 +968,14 @@ impl MacroParse<()> for syn::ItemEnum {
syn::Fields::Unit => (),
_ => bail_span!(v.fields, "only C-Style enums allowed with #[wasm_bindgen]"),
}
// Require that everything either has a discriminant or doesn't.
// We don't really want to get in the business of emulating how
// rustc assigns values to enums.
if v.discriminant.is_some() != has_discriminant {
bail_span!(v, "must either annotate discriminant of all variants or none");
}
let value = match v.discriminant {
Some((
_,
@ -963,12 +1006,30 @@ impl MacroParse<()> for syn::ItemEnum {
value,
})
})
.collect::<Result<_, Diagnostic>>()?;
.collect::<Result<Vec<_>, Diagnostic>>()?;
let mut values = variants.iter().map(|v| v.value).collect::<Vec<_>>();
values.sort();
let hole = values.windows(2)
.filter_map(|window| {
if window[0] + 1 != window[1] {
Some(window[0] + 1)
} else {
None
}
})
.next()
.unwrap_or(*values.last().unwrap() + 1);
for value in values {
assert!(hole != value);
}
let comments = extract_doc_comments(&self.attrs);
program.enums.push(ast::Enum {
name: self.ident,
variants,
comments,
hole,
});
Ok(())
}

13
crates/macro/src/lib.rs
View File

@ -19,3 +19,16 @@ pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream {
Err(diagnostic) => (quote! { #diagnostic }).into(),
}
}
#[proc_macro_attribute]
pub fn __wasm_bindgen_class_marker(attr: TokenStream, input: TokenStream) -> TokenStream {
match macro_support::expand_class_marker(attr.into(), input.into()) {
Ok(tokens) => {
if cfg!(feature = "xxx_debug_only_print_generated_code") {
println!("{}", tokens);
}
tokens.into()
}
Err(diagnostic) => (quote! { #diagnostic }).into(),
}
}

8
crates/macro/ui-tests/invalid-methods.rs
View File

@ -36,8 +36,14 @@ impl A {
x!();
// pub default fn foo() {} // TODO: compiler's pretty printer totally broken
}
#[wasm_bindgen]
impl A {
pub const fn foo() {}
}
#[wasm_bindgen]
impl A {
pub unsafe fn foo() {}
}

8
crates/macro/ui-tests/invalid-methods.stderr
View File

@ -47,15 +47,15 @@ error: macros in impls aren't supported
| ^^^^^
error: can only #[wasm_bindgen] non-const functions
--> $DIR/invalid-methods.rs:41:9
--> $DIR/invalid-methods.rs:43:9
|
41 | pub const fn foo() {}
43 | pub const fn foo() {}
| ^^^^^
error: can only bindgen safe functions
--> $DIR/invalid-methods.rs:42:9
--> $DIR/invalid-methods.rs:48:9
|
42 | pub unsafe fn foo() {}
48 | pub unsafe fn foo() {}
| ^^^^^^
error: aborting due to 10 previous errors

2
crates/macro/ui-tests/unused-attributes.rs
View File

@ -4,6 +4,8 @@ extern crate wasm_bindgen;
use wasm_bindgen::prelude::*;
struct A;
#[wasm_bindgen]
impl A {
#[wasm_bindgen(method)]

12
crates/macro/ui-tests/unused-attributes.stderr
View File

@ -1,13 +1,13 @@
error: unused #[wasm_bindgen] attribute
--> $DIR/unused-attributes.rs:9:20
|
9 | #[wasm_bindgen(method)]
| ^^^^^^
--> $DIR/unused-attributes.rs:11:20
|
11 | #[wasm_bindgen(method)]
| ^^^^^^
error: unused #[wasm_bindgen] attribute
--> $DIR/unused-attributes.rs:10:20
--> $DIR/unused-attributes.rs:12:20
|
10 | #[wasm_bindgen(method)]
12 | #[wasm_bindgen(method)]
| ^^^^^^
error: aborting due to 2 previous errors

6
examples/webaudio/index.js
View File

@ -19,21 +19,21 @@ import('./pkg/webaudio')
const primary_slider = document.getElementById("primary_input");
primary_slider.addEventListener("input", event => {
if (fm) {
fm.set_note(event.target.value);
fm.set_note(parseInt(event.target.value));
}
});
const fm_freq = document.getElementById("fm_freq");
fm_freq.addEventListener("input", event => {
if (fm) {
fm.set_fm_frequency(event.target.value);
fm.set_fm_frequency(parseFloat(event.target.value));
}
});
const fm_amount = document.getElementById("fm_amount");
fm_amount.addEventListener("input", event => {
if (fm) {
fm.set_fm_amount(event.target.value);
fm.set_fm_amount(parseFloat(event.target.value));
}
});
})

4
guide/src/reference/browser-support.md
View File

@ -44,6 +44,10 @@ also like to be aware of it!
};
```
**Warning:** doing this implies the polyfill will always be used,
even if native APIs are available. This has a very significant
performance impact (the polyfill was measured to be 100x slower in Chromium)!
2. If you're not using a bundler you can also include support manually by
adding a `<script>` tag which defines the `TextEncoder` and `TextDecoder`
globals. [This StackOverflow question][soq] has some example usage and MDN

2
guide/src/wasm-bindgen-test/continuous-integration.md
View File

@ -24,7 +24,7 @@ install:
- tar xf wasm-bindgen-0.2.21-x86_64-unknown-linux-musl.tar.gz
- chmod +x wasm-bindgen-0.2.21-x86_64-unknown-linux-musl/wasm-bindgen
# Moves the binaries to a directory that is in your PATH
- mv wasm-bindgen-0.2.19-x86_64-unknown-linux-musl/wasm-bindgen* ~/.cargo/bin
- mv wasm-bindgen-0.2.21-x86_64-unknown-linux-musl/wasm-bindgen* ~/.cargo/bin
# Install node.js with nvm.
- curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.8/install.sh | bash
- source ~/.nvm/nvm.sh

2
package.json
View File

@ -4,7 +4,7 @@
"serve": "webpack-dev-server -p"
},
"devDependencies": {
"@wasm-tool/wasm-pack-plugin": "0.2.1",
"@wasm-tool/wasm-pack-plugin": "0.2.3",
"text-encoding": "^0.7.0",
"html-webpack-plugin": "^3.2.0",
"webpack": "^4.11.1",

72
src/lib.rs
View File

@ -36,8 +36,11 @@ macro_rules! if_std {
/// use wasm_bindgen::prelude::*;
/// ```
pub mod prelude {
#[doc(hidden)]
pub use wasm_bindgen_macro::__wasm_bindgen_class_marker;
pub use wasm_bindgen_macro::wasm_bindgen;
pub use JsValue;
pub use UnwrapThrowExt;
if_std! {
pub use closure::Closure;
@ -638,6 +641,75 @@ pub fn throw_val(s: JsValue) -> ! {
}
}
/// An extension trait for `Option<T>` and `Result<T, E>` for unwraping the `T`
/// value, or throwing a JS error if it is not available.
///
/// These methods should have a smaller code size footprint than the normal
/// `Option::unwrap` and `Option::expect` methods, but they are specific to
/// working with wasm and JS.
///
/// On non-wasm32 targets, defaults to the normal unwrap/expect calls.
///
/// # Example
///
/// ```no_run
/// // If the value is `Option::Some` or `Result::Ok`, then we just get the
/// // contained `T` value.
/// let x = Some(42);
/// assert_eq!(x.unwrap_throw(), 42);
///
/// let y: Option<i32> = None;
///
/// // This call would throw an error to JS!
/// //
/// // y.unwrap_throw()
/// //
/// // And this call would throw an error to JS with a custom error message!
/// //
/// // y.expect_throw("woopsie daisy!")
/// ```
pub trait UnwrapThrowExt<T>: Sized {
/// Unwrap this `Option` or `Result`, but instead of panicking on failure,
/// throw an exception to JavaScript.
fn unwrap_throw(self) -> T {
self.expect_throw("`unwrap_throw` failed")
}
/// Unwrap this container's `T` value, or throw an error to JS with the
/// given message if the `T` value is unavailable (e.g. an `Option<T>` is
/// `None`).
fn expect_throw(self, message: &str) -> T;
}
impl<T> UnwrapThrowExt<T> for Option<T> {
fn expect_throw(self, message: &str) -> T {
if cfg!(all(target_arch = "wasm32", not(target_os = "emscripten"))) {
match self {
Some(val) => val,
None => throw_str(message),
}
} else {
self.expect(message)
}
}
}
impl<T, E> UnwrapThrowExt<T> for Result<T, E>
where
E: core::fmt::Debug,
{
fn expect_throw(self, message: &str) -> T {
if cfg!(all(target_arch = "wasm32", not(target_os = "emscripten"))) {
match self {
Ok(val) => val,
Err(_) => throw_str(message),
}
} else {
self.expect(message)
}
}
}
/// Returns a handle to this wasm instance's `WebAssembly.Module`
///
/// Note that this is only available when the final wasm app is built with

23
tests/unwrap_throw.rs Normal file
View File

@ -0,0 +1,23 @@
extern crate wasm_bindgen;
use wasm_bindgen::prelude::*;
#[test]
fn unwrap_throw_ok() {
assert_eq!(Some(42).unwrap_throw(), 42);
let x: Result<i32, ()> = Ok(42);
assert_eq!(x.unwrap_throw(), 42);
}
#[test]
#[should_panic]
fn unwrap_throw_none() {
let x: Option<i32> = None;
x.unwrap_throw();
}
#[test]
#[should_panic]
fn unwrap_throw_err() {
let x: Result<i32, ()> = Err(());
x.unwrap_throw();
}

5
tests/wasm/classes.js
View File

@ -143,3 +143,8 @@ exports.js_renamed_export = () => {
x.foo();
x.bar(x);
};
exports.js_conditional_bindings = () => {
const x = new wasm.ConditionalBindings();
x.free();
};

17
tests/wasm/classes.rs
View File

@ -22,6 +22,7 @@ extern "C" {
fn js_js_rename();
fn js_access_fields();
fn js_renamed_export();
fn js_conditional_bindings();
}
#[wasm_bindgen_test]
@ -402,3 +403,19 @@ impl RenamedExport {
fn renamed_export() {
js_renamed_export();
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen)]
pub struct ConditionalBindings {
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen)]
impl ConditionalBindings {
#[cfg_attr(target_arch = "wasm32", wasm_bindgen(constructor))]
pub fn new() -> ConditionalBindings {
ConditionalBindings {}
}
}
#[wasm_bindgen_test]
fn conditional_bindings() {
js_conditional_bindings();
}

10
tests/wasm/enums.js
View File

@ -18,3 +18,13 @@ exports.js_c_style_enum_with_custom_values = () => {
assert.strictEqual(wasm.enum_with_custom_values_cycle(wasm.ColorWithCustomValues.Green), wasm.ColorWithCustomValues.Yellow);
};
exports.js_handle_optional_enums = x => wasm.handle_optional_enums(x);
exports.js_expect_enum = (a, b) => {
assert.strictEqual(a, b);
};
exports.js_expect_enum_none = a => {
assert.strictEqual(a, undefined);
};

31
tests/wasm/enums.rs
View File

@ -6,9 +6,13 @@ use wasm_bindgen_test::*;
extern "C" {
fn js_c_style_enum();
fn js_c_style_enum_with_custom_values();
fn js_handle_optional_enums(x: Option<Color>) -> Option<Color>;
fn js_expect_enum(x: Color, y: Option<Color>);
fn js_expect_enum_none(x: Option<Color>);
}
#[wasm_bindgen]
#[derive(PartialEq, Debug)]
pub enum Color {
Green,
Yellow,
@ -22,7 +26,7 @@ pub mod inner {
pub enum ColorWithCustomValues {
Green = 21,
Yellow = 34,
Red,
Red = 2,
}
}
@ -53,3 +57,28 @@ fn c_style_enum() {
fn c_style_enum_with_custom_values() {
js_c_style_enum_with_custom_values();
}
#[wasm_bindgen]
pub fn handle_optional_enums(x: Option<Color>) -> Option<Color> {
x
}
#[wasm_bindgen_test]
fn test_optional_enums() {
use self::Color::*;
assert_eq!(js_handle_optional_enums(None), None);
assert_eq!(js_handle_optional_enums(Some(Green)), Some(Green));
assert_eq!(js_handle_optional_enums(Some(Yellow)), Some(Yellow));
assert_eq!(js_handle_optional_enums(Some(Red)), Some(Red));
}
#[wasm_bindgen_test]
fn test_optional_enum_values() {
use self::Color::*;
js_expect_enum(Green, Some(Green));
js_expect_enum(Yellow, Some(Yellow));
js_expect_enum(Red, Some(Red));
js_expect_enum_none(None);
}