+/* _PDCLIB_static_assert( e, m ) does a compile-time assertion of expression */
+/* e, with m as the failure message. */
+/* _PDCLIB_TYPE_SIGNED( type ) resolves to true if type is signed. */
+/* _PDCLIB_TWOS_COMPLEMENT( type ) resolves to true if two's complement is */
+/* used for type. */