Supported Pascal language constructs

In this chapter we describe the pascal constructs supported by Free Pascal, as well as the supported data types.

This is not intended as an introduction to the Pascal language, although all language constructs will be covered. The main goal is to explain what is supported by Free Pascal, and where the Free implementation differs from the Turbo Pascal one.

• Data types
  • Integer types
  • Real types
  • Character types
  • Booleans
  • Arrays
  • Pointers
  • Procedural types
  • Records
  • Set types
  • Enumeration types
• Constants
  • Ordinary constants
  • Typed constants
• Objects
• Classes
  • Class definitions
  • Properties
• Statements controlling program flow.
  • Assignments
  • The Case statement
  • The For..to/downto..do statement
  • The Goto statement
  • The If..then..else statement
  • The Repeat..until statement
  • The While..do statement
  • The With statement
  • Compound statements
  • Exceptions
• Using functions and procedures
  • Function overloading
  • Const parameters
  • Open array parameters
• Using assembler in your code
  • Assembler statements
  • Assembler procedures and functions
• Modifiers
  • Public
  • cdecl
  • popstack
  • external
  • Export
  • StdCall
  • Alias
  • [RegisterList]
  • Unsupported Turbo Pascal modifiers