Support WASM

[CarlKCarlK]

The include-flate crate is great and would be super useful for WASM apps and libraries. It would be a way to include data files that WASM couldn't otherwise upload.

It's possible that you can make it compatible just by changing some ::std's to ::alloc's.

When I expand the flate! macro on my I get code like this (noticed the ::std's)

struct NAME_TO_PROB_STR {
    __private_field: (),
}
#[doc(hidden)]
static NAME_TO_PROB_STR: NAME_TO_PROB_STR = NAME_TO_PROB_STR {
    __private_field: (),
};
impl ::lazy_static::__Deref for NAME_TO_PROB_STR {
    type Target = ::std::string::String;
    fn deref(&self) -> &::std::string::String {
        #[inline(always)]
        fn __static_ref_initialize() -> ::std::string::String {
            ::include_flate::decode_string(
                b"\x05\xc0;\n\x00 \x08\x00\xd0Y\xc1\xa3\x14.\xd1l\xd0A\x14\x1a\x84~DK\xb7\xefM\x1d\r\xf6Y\xa6\xe6\xdd\xef#\x14)\x90\"s\r\x9c\t?",
            )
        }
        #[inline(always)]
        fn __stability() -> &'static ::std::string::String {
            static LAZY: ::lazy_static::lazy::Lazy<::std::string::String> = ::lazy_static::lazy::Lazy::INIT;
            LAZY.get(__static_ref_initialize)
        }
        __stability()
    }
}
impl ::lazy_static::LazyStatic for NAME_TO_PROB_STR {
    fn initialize(lazy: &Self) {
        let _ = &**lazy;
    }
}

This works if I manually change the ::std's to ::alloc's. You use lazy_static which says that it is 'no_std' compatible, so it should be able to work with WASM.

Thanks for considering adding this capability.

• Carl p.s. I recently converted one of my non-macro crates to WASM and no_std compatibility and wrote a blog post about the process that you might find interesting. Thanks again for creating this crate. It did just want I needed.

[SOF3]

I have no problem with no_std support. But doesn't the wasm32 target contain std? Or am I missing something?

[CarlKCarlK]

Wasm32 supports many things in std (like alloc::collections and core:f32), but not everything. The biggest thing it is missing is file IO.

From: Jonathan Chan Kwan @.> Sent: Sunday, July 9, 2023 7:11 PM To: @.> Cc: Carl @.>; @.> Subject: Re: [SOF3/include-flate] Support WASM (Issue #16)

I have no problem with no_std support. But doesn't the wasm32 target contain std? Or am I missing something?

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[SOF3]

I mean the wasm32-unknown-unknown target already supports std (even though many are unimplemented), and it doesn't seem to require no_std to build a normal .wasm binary.

[CarlKCarlK]

I didn’t know that. Thanks! Include-flate seems to be working for me, now.

• Carl From: Jonathan Chan Kwan @.> Sent: Sunday, July 9, 2023 8:08 PM To: @.> Cc: Carl @.>; @.> Subject: Re: [SOF3/include-flate] Support WASM (Issue #16)

I mean the wasm32-unknown-unknown target already supports std (even though many are unimplemented), and it doesn't seem to require no_std to build a normal wasm32 binary.

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