let {{ rs_name }} = if {{ name }}.is_null() {
None
} else {
// SAFETY: null check above guarantees {{ name }} is a valid pointer; string is valid UTF-8 from caller.
match unsafe { CStr::from_ptr({{ name }}) }.to_str() {
Ok(s) => {
match serde_json::from_str{{ turbofish }}(s) {
Ok(v) => Some(v),
Err(e) => {
set_last_error(2, &format!("Invalid JSON in parameter '{{ name }}': {}", e));
{{ fail_ret }}
}
}
}
Err(_) => {
set_last_error(1, "Invalid UTF-8 in parameter '{{ name }}'");
{{ fail_ret }}
}
}
};