Boolean values: Difference between revisions

FB recognizes two types for boolean truth values: BOOL and boolean. There is a subtle difference between the two. A BOOL will accept without complaint two values, the macros YES, and NO, or the equivalent native FB constants, _true, and _false, and, of course, 0 and 1. However, although a BOOL can be assigned other values, it will throw a clang (FB"s native compiler) warning as with this example:

On the other hand, a Boolean can be assigned not only YES, NO, _true, or _false, and 0 or 1, but also any integerother valuevalues, such as the common -1, anand compile without complaint.