Macro js_reexport

macro_rules! js_reexport {
    (
        // # Args
        // [            header section
        // $module:     optional js module name (defaults to "env")
        // ]
        // $fn_attrs:   optional attributes and doc comments
        // $vis:        visibility of the extern function (defaults to private)
        // safe|unsafe  optional safety specifier (defaults to unsafe)
        // $js_fn:      optional link_name (different javascript function name)
        // $fn:         imported rust function name (default same js name)

        [
        $(module: $module:literal)? $(,)?
        ]
        $(
            $(#[$fn_attrs:meta])*
            $vis:vis $(safe$($_s:block)?)? $(unsafe$($_u:block)?)?
            fn
            $($js_fn:literal)?
            $fn:ident
            ($($param:ident: $param_ty:ty),* $(,)?) $(-> $fn_return:ty)?;
        )*
    ) => { ... };
}

Available on crate features js and unsafe_ffi only.

Helps re-exporting javascript functions.

Example

js_reexport! {
    [ module: "env" ]
    pub safe fn same_fn_name(x: f64, y: f64, w: f64, h: f64);
    pub(crate) safe fn "js_fn_name" rust_fn_name(x: f64, y: f64, w: f64, h: f64);
    unsafe fn "js_fn" rs_fn(ptr: *const u8, len: usize, x: f64, y: f64);
}