71     #define BASES public d  macro
72     : BASES
74     typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
75     #undef BASES
107     #define BASES public c  macro
108     : BASES
110     typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
111     #undef BASES
143     #define BASES public b  macro
144     : BASES
146     typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
147     #undef BASES
179     #define BASES public b  macro
180     : BASES
182     typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
183     #undef BASES