c-closures 0.3.1

THIS CRATE IS DEPRECATED, you now only need c-closures-build. General purpose way for Rust closures to cross an FFI boundary into C/C++. Use with `c-closures-build`.
Documentation 
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use std::{env, path::PathBuf};

fn main() {
    let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header("rust_closures.h")
        // In the event of a C/C++ compile error this will provide more info
        .clang_arg("-v")
        // Tell cargo to invalidate the built crate whenever any of the
        // included header files changed.
        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
        .generate_comments(true)
        .derive_copy(false)
        .generate_inline_functions(false)
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

    // Write the bindings to the $OUT_DIR/bindings.rs file.
    bindings
        .write_to_file(PathBuf::from(env::var("OUT_DIR").unwrap()).join("bindings.rs"))
        .expect("Couldn't write bindings!");
    cc::Build::new()
        .file("rust_closures.c")
        .compile("rust_closures");
}