Make INIT optional for TUPLE.

m-tuple.h

@@ -84,7 +84,8 @@ namespace m_tuple {
 #define TUPLEI_DEF2_B(name, ...)                 \
   TUPLE_DEFINE_TYPE(name, __VA_ARGS__)           \
   TUPLE_DEFINE_ENUM(name, __VA_ARGS__)           \
-  TUPLE_DEFINE_INIT(name, __VA_ARGS__)           \
+  M_IF(TUPLE_ALL_INIT(__VA_ARGS__))              \
+  (TUPLE_DEFINE_INIT(name, __VA_ARGS__),)        \
   TUPLE_DEFINE_INIT_SET(name, __VA_ARGS__)       \
   TUPLE_DEFINE_INIT_SET2(name, __VA_ARGS__)      \
   TUPLE_DEFINE_SET(name, __VA_ARGS__)            \
@@ -421,6 +422,8 @@ namespace m_tuple {
 #define TUPLE_TEST_METHOD_P(method, trio)               \
   M_APPLY(TUPLE_TEST_METHOD2_P, method, M_OPFLAT trio)
 
+#define TUPLE_ALL_INIT(...)                              \
+  M_REDUCE2(TUPLE_TEST_METHOD_P, M_AND, INIT, __VA_ARGS__)
 #define TUPLE_ALL_CMP(...)                              \
   M_REDUCE2(TUPLE_TEST_METHOD_P, M_AND, CMP, __VA_ARGS__)
 #define TUPLE_ALL_EQUAL(...)                            \
@@ -445,7 +448,7 @@ namespace m_tuple {
   M_REDUCE2(TUPLE_TEST_METHOD_P, M_AND, CLEAN, __VA_ARGS__)
 
 #define TUPLEI_OPLIST(name, ...)                                        \
-  (INIT(M_C(name,_init)),                                               \
+  (M_IF_METHOD_ALL(INIT, __VA_ARGS__)(INIT(M_C(name,_init)),),          \
    INIT_SET(M_C(name, _init_set)),                                      \
    SET(M_C(name,_set)),                                                 \
    CLEAR(M_C(name, _clear)),                                            \

tests/test-mtuple.c

@@ -33,6 +33,11 @@ TUPLE_DEF2(pair,
            (value, testobj_t, TESTOBJ_OPLIST) )
 END_COVERAGE
 
+// Minimum definition
+TUPLE_DEF2(pair_min,
+           (key1, string_t, (INIT_SET(string_init_set), SET(string_set), CLEAR(string_clear))),
+           (key2, string_t, (INIT_SET(string_init_set), SET(string_set), CLEAR(string_clear))))
+
 // No cmp defined
 TUPLE_DEF2(triple,
            (key, string_t, (INIT(string_init), INIT_SET(string_init_set), SET(string_set), CLEAR(string_clear), CMP(string_cmp))),
@@ -66,6 +71,7 @@ TUPLE_DEF2(rtuple2, (name, string_t), (value, int))
 
 TUPLE_DEF2(rtuple3, (name, string_t), (ituple2, rtuple2_t), (ituple, rtuple_t) )
 
+
 static void check_swap(void)
 {
   pair_str_t p1, p2;