|Part of Yhc|
Because Yhc is ported to several platforms with different word sizes the meaning of the various primitive integer types is non-trivial. This appears both in the descriptions in this document and also in the runtime source code.
Yhc uses both hardware dependent and hardware independent integer types.
1 Hardware Dependent
The basis of the hardware dependent type is the Word which is always the size of a native pointer (generally either 32 or 64 bits). There are then names for various subdivisions of the Word.
Word or UInt - unsigned integer, same size as native pointer HWord or HUInt - unsigned integer, half the size of a Word QWord or QUInt - unsigned integer, quarter the size of a Word Int - signed integer, same size as Word HInt - signed integer, same size as HWord QInt - signed integer, same size as QWord
The distinction between Word and UInt (HWord and HUInt, etc) is whether the item in question is being used as a generic piece of space the same size as a pointer (Word) or whether it is used as an unsigned integer (UInt).
2 Hardware Independent
The hardware independent types are always exactly the same size on all platforms.
UByte or UInt8 - unsigned 8 bit integer UInt16 - unsigned 16 bit integer UInt32 - unsigned 32 bit integer Char or Int8 - signed 8 bit integer Int16 - signed 16 bit integer Int32 - signed 32 bit integer
The different between Char and Int8 is whether it is being used as character or simply as a small integer. The difference between UByte and UInt8 is the same difference as between Word and UInt.