Compiler directives, are comments started with $ symbol. Compiler
directives can be used wherever comments are allowed.
Compiler directives... - begin with {$, /*$ or (*$ - are followed by the name of the directive
- end with }, */ or *)
Note that // and -- comments can not be used to specify compiler
directive
Compiler directives come in three varieties:
Switch directives turn compiler features on or switches off when + or - are specified after the directive name.
Parameter directives specify parameters that affect the compilation.
Conditional directives control conditional compilation of parts of the source text.
3. Compiler Directives