Function nix_has_attr_byname 

pub unsafe extern "C" fn nix_has_attr_byname(
    context: *mut nix_c_context,
    value: *const nix_value,
    state: *mut EvalState,
    name: *const c_char,
) -> bool

Check if an attribute name exists on a value @ingroup value_extract

Arguments

• context [out] - Optional, stores error information
• value [in] - Nix value to inspect
• state [in] - nix evaluator state
• name [in] - attribute name

Returns

value, error info via context