type LongestBool = Boolean attribute (Size = BitSizeOf (LongestInt));
The intrinsic LongestBool represents boolean values, but occupies the same memory space as a LongestInt. It is used when you need to define a parameter or record that conforms to some external library or system specification.
LongestBool is a GNU Pascal extension.
program LongestBoolDemo; var a: LongestBool; begin LongestInt (a) := 1; if a then WriteLn ('Ord (True) = 1') end.
Boolean (Intrinsic), Boolean, True, False, CBoolean, ByteBool, ShortBool, MedBool, WordBool, LongBool.