Both version of the macro makes this fall through from 0: switch (a) { brkcase 0: foo(); case 1: bar(); } so in a sense the `if (0) case` trick al

Both version of the macro makes this fall through from 0: switch (a) { brkcase 0: foo(); case 1: bar(); } so in a sense the `if (0) case` trick also affects the previous case, not the current one. But that one also falls apart when there are multiple statements under the brkcase.