The current directives settings are inserted in a horizontal line at the top of your file, along with other current settings, such as compiler warnings (the settings for the $WARN directive). If you are working in the Code Editor and want a quick way to see the compiler directives that are in effect, press Ctrl+O+O. If you change a compiler switch and compile, all units for which you have source code are recompiled with the new settings. Any changes you make to the settings on the Compiling page affect all units whenever their source code is recompiled in subsequent compilations of that project. You can set many of the compiler directives on the Project > Options > Delphi Compiler > Compiling dialog box. When using the command-line compiler, you can specify compiler directives on the command line for example, You can define a Header on the TListBox component by. You can also change the default directives using the -$ directive switch with the command-line compiler, dcc32, and for the IDE, bds.exe. Mobile Tutorial: Using ListBox Components to Display a Table View (iOS and Android). Using New Delphi Coding Architectures and Styles. Note that comments beginning with the double-slash // cannot be used for compiler directives. We have seen that when you define a class in Delphi 2009, you can now add an extra. You can include comments after the directive and any necessary parameters.Ĭompiler directives can be placed wherever comments are allowed. This is true in C++ as well with Class Helpers, Automatic Reference. The symbol is recognized for the remainder of the compilation of the current module in which the symbol. Embarcadero Delphi HeidiSQL is proudly built with Embarcadero Delphi. Defines a Delphi conditional symbol with the given name. This provides leading language features like Generics (Delphi), Asynchronous programming, very powerful Run Time Type Information (RTTI), or as C developers call it, reflection. Issue 872: fix crash when opening a table with columns defined as INVISIBLE. Embarcadero Technologies developer tools enable you to securely build and maintain scalable applications faster using C++ and Delphi. The compiler directive starts with a $ (dollar-sign) as the first character after the opening comment delimiter, immediately followed by a name (one or more letters) that designates the particular directive. As a result, RAD Studio delivers developers a choice of two languages (Delphi and enhanced C++). Delphi 11 Alexandria Defines As part of my recent DelphiCon 2021 session, Multi-Platform Explorations using Delphi, FMX, Feeds, REST and More, my example code needed to use IFDEFs for some of the uses statements, variable definitions and code. Or using code: if System.Go Up to Delphi Compiler Directives (List) IndexĮach Delphi compiler directive is classified as one of the following:Ī compiler directive is a comment with a special syntax. **** CompilerVersion (Delphi 6 or later) can be used with conditional directives like **** C++Builder 3.0 used VER110 (it had its own version of the Delphi compiler included). *** This conditional define is shared with C++Builder 5 (Checking for the conditional define "LINUX" helps to determine whether the compiler is Kylix or Delphi and "BCB" can be used to determine if C++Builder is being used). ** This conditional define is shared between C++Builder 6, Delphi 6, Kylix 1, 2, and 3 Unicode characters, 8-bit (ANSI) characters, multiuser servers and multilanguage applications. Note: In RAD Studio, string is an alias for UnicodeString. This define is used in the "IDE Integration Packs" that were released to Borland partners in order to allow IDE plugins like ModelMaker Code Explorer 8-bit (ANSI) characters, DBCS ANSI, MBCS ANSI, Unicode characters, etc. * This conditional define is shared by the Delphi compilers used to build C#Builder 1 and Delphi 8, which do not natively support Delphi for Win32. In earlier Delphi versions various compiler defined VERxxx symbols are used to determine compiler versions.ĬompilerVersion values and the equivalent compiler defined symbols for the Delphi versions in which the CompilerVersion constant is defined are: Compiler The CompilerVersion constant was introduced in Delphi 6 along with conditional expressions. This is a change that breaks a key tenet of. The Delphi language in 10.3 has a fairly core change in the way it allows far more flexibility in the declaration of local variables, their scope and lifetime. It is defined in the System unit and may be referenced either in code just as any other constant: The coming 10.3 version of Delphi introduces a very handy feature to the language, local inline variables with local scope and type inference. The CompilerVersion constant identifies the internal version number of the Delphi compiler.
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