Function declare_import

crates/rust/src/lib.rs:1781–1813

(
    wasm_import_module: &str,
    wasm_import_name: &str,
    rust_name: &str,
    params: &[WasmType],
    results: &[WasmType],
)

}

fn declare_import(
    wasm_import_module: &str,
    wasm_import_name: &str,
    rust_name: &str,
    params: &[WasmType],
    results: &[WasmType],
) -> String {
    let mut sig = "(".to_owned();
    for param in params.iter() {
        sig.push_str("_: ");
        sig.push_str(wasm_type(*param));
        sig.push_str(", ");
    }
    sig.push(')');
    assert!(results.len() < 2);
    for result in results.iter() {
        sig.push_str(" -> ");
        sig.push_str(wasm_type(*result));
    }
    format!(
        "
            #[cfg(target_arch = \"wasm32\")]
            #[link(wasm_import_module = \"{wasm_import_module}\")]
            unsafe extern \"C\" {{
                #[link_name = \"{wasm_import_name}\"]
                fn {rust_name}{sig};
            }}

            #[cfg(not(target_arch = \"wasm32\"))]
            unsafe extern \"C\" fn {rust_name}{sig} {{ unreachable!() }}
        "
    )
}

fn int_repr(repr: Int) -> &'static str {
    match repr {