alef 0.25.50

Opinionated polyglot binding generator for Rust libraries
Documentation 
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    if {{ name }}.is_null() && {{ name }}_len > 0 {
        set_last_error(1, "Null pointer passed for parameter '{{ name }}'");
        {{ fail_ret }}
    }
    // SAFETY: a null {{ name }} maps to None; otherwise the pointer is valid for {{ name }}_len bytes.
    let {{ rs_name }} = if {{ name }}.is_null() {
        None
    } else {
        Some(unsafe { std::slice::from_raw_parts({{ name }}, {{ name }}_len) }.to_vec())
    };