This commit tweaks the codegen for imported functions and such (anything
that relies on some imported intrinsic or function filled in by the CLI)
to share as much code as possible on non-wasm32 platforms. This should
help us catch more errors before compiling to wasm and also just make it
easier to write UI tests!
For example a UI test previously couldn't be written for #1528 but now
it can be, and one is include (although the error message is quite bad).
This is not necessary because references are FFI-safe and compatible with corresponding pointers, so we can just use them directly as an input.
Fixes#1540.
Some speed up numbers from my string-heavy WASM benchmarks:
- Firefox + encodeInto: +45%
- Chrome + encodeInto: +80%
- Firefox + encode: +29%
- Chrome + encode: +62%
Note that this helps specifically with case of lots of small ASCII strings, in case of large strings there is no measurable difference in either direction.
Run exports through the same identifier generation as imports to ensure
that everything gets a unique identifier and then just make sure all the
appropriate wires are hooked up when dealing with exports and imports.
Closes#1496
Currently the import object constructed for the `--target web` output
only ever includes the current module as an one of the modules included.
With `wasm-bindgen`'s optimization to import directly from modules,
however, it's possible to have more modules imported from in the
generated wasm file. This commit ensures that the imports are hooked up
in the `--target web` es6 emulation mode, ensuring there aren't
extraneous errors about import objects.
We don't support variadic args in front, but, luckily for us, `new Function` accepts comma-separated args as a single string as well (see updated JSON test for an example).
- `JsString::from_code_point` - allows to create JS strings using slice of codes in WASM memory.
- `JsString::from_char_code` - same as above, but also uses updated signature with `u16` instead of `u32` (partially helps with #1460 at least for the new binding).
