Cycling74/max-sdk

C2118 - negative subscript

klanger59 opened this issue · 2 comments

klanger59 commented

CLASS_ATTR_FLOAT(c, "middle_c", ATTR_FLAGS_NONE, t_scl2list, t_sclMiddleC);
and
CLASS_ATTR_FLOAT_ARRAY(c, "scl2list", ATTR_FLAGS_NONE, t_scl2list, t_sclMappingValues,1024);
generates compiler error C2118 on VS 2022.
it was working with sdk 8.0.3

Best regards
Klaus

isabelgk commented

Hi Klaus,

It would be good to narrow it down to whether this is an SDK 8.0.3 --> 8.2.0 issue or a VS 2019 --> VS 2022 one. Have you tried different combinations?

It's hard to tell much more without more context as well. A negative subscript sounds like the static assertions we use to check that the correct type is passed is failing. For example, CLASS_ATTR_FLOAT:

C74_STATIC_ASSERT(structmembersize(structname,structmember)==sizeof(float))

If the type t_sclMiddleC is not a float, then the assertion will occur.

klanger59 commented

Hi Isabel,

thank you for the hint.
t_sclMiddleC is a double.
i started with VS19 & SDK 8.0.3 and VS22 & SDK 8.0.3
the issue came up with VS22 & SDK 8.2.0.

Changing to CLASS_ATTR_DOUBLE solved my issue.

Thanks a lot; i am happy;
and have a nice day
Klaus