PasDoc ยป LinkTag

Inside a description of one item you can place a link to another item using @link tag. Depending on the type of output, these links could be hyperlinks (in HTML) or page references (in LaTeX).


  MaxFactorialArgument = 20;

{ This function calculates factorial of n, n!.
  You should always call this function with
  n <= @link(MaxFactorialArgument),
  otherwise result will not fit in Int64 type. }
function SmallFactorial(n: Integer): Int64;

You can link to any item in your units that has some Pascal identifier. So you can link not only to some procedure, constant, variable, etc. but also to a whole class or a whole unit.

You can use qualified names for the link target, like

  • @link(SomeClassName.IdentifierinThisClass) or

  • @link(SomeUnitName.IdentifierInThisUnit) or even

  • @link(SomeUnitName.SomeClassName.Identifier).

When resolving links, pasdoc tries to loosely mimic Pascal identifier scope: The name of an identifier is first searched within the current class / record etc., then within the current unit, then within the units in the uses clause. Only if that fails pasdoc will search globally in all known units.

You can also specify an explicit display name for this link, simply by putting a space after your link target and then typing the link display name. E.g.

@link(TMyClass.MyMethod This is a silly link to MyMethod in TMyClass)

One use for such an explicit name is if you have a class TMemo that has a property named Lines that returns an instance of a class TStringList. You want to document routine TMemo.Clear, that calls Lines.Clear and then does some repainting stuff. So you want to link in your description to TStringList.Clear, but you want the link to show as Lines.Clear. You can do it by writing a description like

  TMemo = class
    property Lines: TStringList read FLines;

    { This method calls @link(TStringList.Clear Lines.Clear)
      and then does some repainting stuff. }
    procedure Clear;

If no explicit display name was specified, then what multipart links will look like depends on the --link-look CommandLine option.