Delphi in a Nutshell

Name

$ReferenceInfo Compiler Directive

Syntax

{$YD}                // default
{$Y+}
{$Y-}

{$ReferenceInfo Off} // default
{$ReferenceInfo On}

Scope

Local

Description

By default, the debugging information for a unit includes the definitions of all symbols declared in the unit. With the $ReferenceInfo directive, you can also store references to the symbols. With the reference information, the project browser can show you every use of a type, variable, subroutine, or other symbol.

You must enable $DefinitionInfo in order to use $ReferenceInfo. The $DefinitionInfo and $ReferenceInfo directives define three possible states of browser information. The $Y directive provides a shortcut for the three states:

• The $YD directive is equivalent to enabling definitions and disabling references. This is the default.

• The $Y+ directive is equivalent to enabling definitions and references.

• The $Y- directive is equivalent to disabling definitions and references.

• You cannot enable references without also enabling definitions, so there is no fourth state.

Definitions and references require that $DebugInfo and $LocalSymbols be enabled.

See Also

$DebugInfo Compiler Directive, $DefinitionInfo Compiler Directive, $LocalSymbols Compiler Directive