Function nix_get_list_byidx_lazy 

pub unsafe extern "C" fn nix_get_list_byidx_lazy(
    context: *mut nix_c_context,
    value: *const nix_value,
    state: *mut EvalState,
    ix: c_uint,
) -> *mut nix_value

Get the ix’th element of a list without forcing evaluation of the element @ingroup value_extract Returns the list element without forcing its evaluation, allowing access to lazy values. The list value itself must already be evaluated. Call nix_value_decref() when you’re done with the pointer

Arguments

• context [out] - Optional, stores error information
• value [in] - Nix value to inspect (must be an evaluated list)
• state [in] - nix evaluator state
• ix [in] - list element to get

Returns

value, NULL in case of errors