[next] [prev] [prev-tail] [tail] [up]

## Chapter 3
Types

All variables have a type. Free Pascal supports the same basic types as Turbo Pascal, with some extra types from Delphi. The programmer can declare his own types, which is in essence defining an identifier that can be used to denote this custom type when declaring variables further in the source code.

_________________________________________________________________________________________________________ Type declaration
___________________________________________________________________

There are 7 major type classes :

_________________________________________________________________________________________________________ Types
___________________________________________________________________

The last class, type identifier, is just a means to give another name to a type. This presents a way to make types platform independent, by only using these types, and then defining these types for each platform individually. The programmer that uses these units doesn’t have to worry about type size and so on. It also allows to use shortcut names for fully qualified type names. e.g. define system.longint as Olongint and then redefine longint.

3.1 Base types
Ordinal types
Real types
3.2 Character types
Char
Strings
Short strings
Ansistrings
Constant strings
PChar - Null terminated strings
3.3 Structured Types
Arrays
Record types
Set types
File types
3.4 Pointers
3.5 Forward type declarations
3.6 Procedural types

[next] [prev] [prev-tail] [front] [up]