Issue in generation of functions:

if the method in the oplist uses API_* transformation,
if this method is a macro itself,
it may delay the expansion too much and
the macro may not be expanded at all in the final code generation.

Fix issue by adding a supplementary evaluation in the macro expansion.
Add test cases

m-list.h

@@ -148,7 +148,7 @@
 
 /* Deferred evaluation for the list definition,
    so that all arguments are evaluated before further expansion */
-#define M_L1ST_DEF_P1(arg) M_L1ST_DEF_P2 arg
+#define M_L1ST_DEF_P1(arg) M_ID( M_L1ST_DEF_P2 arg )
 
 /* Validate the oplist before going further */
 #define M_L1ST_DEF_P2(name, type, oplist, list_t, it_t)                       \
@@ -913,7 +913,7 @@
 
 /* Deferred evaluation for the dual-push list definition,
    so that all arguments are evaluated before further expansion */
-#define M_L1ST_DUAL_PUSH_DEF_P1(arg) M_L1ST_DUAL_PUSH_DEF_P2 arg
+#define M_L1ST_DUAL_PUSH_DEF_P1(arg) M_ID( M_L1ST_DUAL_PUSH_DEF_P2 arg )
 
 /* Validate the oplist before going further */
 #define M_L1ST_DUAL_PUSH_DEF_P2(name, type, oplist, list_t, it_t)             \