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Enable cargo test where possible

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Currently `#[wasm_bindgen]` generates a bunch of references to symbols that
don't actually exist on non-wasm targets, making it more difficult to get a
crate working across multiple platforms. This commit updates the symbol
references to be dummy ones that panic on non-wasm targets to allow simple
testing/benchmarking to work on native targets.

While this isn't a perfect solution for #114 it's probably as good as we can do
for now pending upstream Cargo features, so I'm gonna say that it...

Closes #114
This commit is contained in:
Alex Crichton
2018-04-27 13:43:47 -07:00
parent 98f3b9634e
commit 4a873af8d1
4 changed files with 188 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
crates/backend/src/codegen.rs
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@ -155,6 +155,7 @@ impl ToTokens for ast::Struct {
impl ::wasm_bindgen::__rt::core::convert::From<#name> for
::wasm_bindgen::JsValue
{
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
fn from(value: #name) -> Self {
let ptr = ::wasm_bindgen::convert::IntoWasmAbi::into_abi(
value,
@ -174,8 +175,14 @@ impl ToTokens for ast::Struct {
)
}
}
#[cfg(not(all(target_arch = "wasm32", not(target_os = "emscripten"))))]
fn from(_value: #name) -> Self {
panic!("cannot convert to JsValue outside of the wasm target")
}
}
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
#[no_mangle]
pub unsafe extern fn #free_fn(ptr: u32) {
<#name as ::wasm_bindgen::convert::FromWasmAbi>::from_abi(
@ -229,6 +236,7 @@ impl ToTokens for ast::StructField {
let desc = syn::Ident::from(format!("__wbindgen_describe_{}", getter));
(quote! {
#[no_mangle]
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
pub unsafe extern fn #getter(js: u32)
-> <#ty as ::wasm_bindgen::convert::IntoWasmAbi>::Abi
{
@ -260,6 +268,7 @@ impl ToTokens for ast::StructField {
(quote! {
#[no_mangle]
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
pub unsafe extern fn #setter(
js: u32,
val: <#ty as ::wasm_bindgen::convert::FromWasmAbi>::Abi,
@ -395,6 +404,7 @@ impl ToTokens for ast::Export {
let tokens = quote! {
#[export_name = #export_name]
#[allow(non_snake_case)]
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
pub extern fn #generated_name(#(#args),*) #ret_ty {
::wasm_bindgen::__rt::link_this_library();
let #ret = {
@ -424,6 +434,7 @@ impl ToTokens for ast::Export {
// this, but the tl;dr; is that this is stripped from the final wasm
// binary along with anything it references.
#[no_mangle]
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
pub extern fn #descriptor_name() {
use wasm_bindgen::describe::*;
inform(FUNCTION);
@ -640,6 +651,7 @@ impl ToTokens for ast::ImportFunction {
.iter()
.skip(if is_method { 1 } else { 0 })
.collect::<Vec<_>>();
let arguments = &arguments[..];
let me = if is_method {
quote! { &self, }
@ -650,6 +662,7 @@ impl ToTokens for ast::ImportFunction {
let invocation = quote! {
#(#attrs)*
#[allow(bad_style)]
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
#vis extern #fn_token #rust_name(#me #(#arguments),*) #ret {
::wasm_bindgen::__rt::link_this_library();
#[wasm_import_module = "__wbindgen_placeholder__"]
@ -668,6 +681,14 @@ impl ToTokens for ast::ImportFunction {
}
}
#(#attrs)*
#[allow(bad_style, unused_variables)]
#[cfg(not(all(target_arch = "wasm32", not(target_os = "emscripten"))))]
#vis extern #fn_token #rust_name(#me #(#arguments),*) #ret {
panic!("cannot call wasm-bindgen imported functions on \
non-wasm targets");
}
};
if let Some(class) = class_ty {
@ -766,6 +787,7 @@ impl ToTokens for ast::ImportStatic {
(quote! {
#[allow(bad_style)]
#vis static #name: ::wasm_bindgen::JsStatic<#ty> = {
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
fn init() -> #ty {
#[wasm_import_module = "__wbindgen_placeholder__"]
extern {
@ -779,6 +801,10 @@ impl ToTokens for ast::ImportStatic {
}
}
#[cfg(not(all(target_arch = "wasm32", not(target_os = "emscripten"))))]
fn init() -> #ty {
panic!("cannot access imported statics on non-wasm targets")
}
static mut _VAL: ::wasm_bindgen::__rt::core::cell::UnsafeCell<Option<#ty>> =
::wasm_bindgen::__rt::core::cell::UnsafeCell::new(None);
::wasm_bindgen::JsStatic {