C preprocessor: Difference between revisions

Revision as of 20:51, 26 August 2025

Revision as of 20:52, 26 August 2025

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The [[C Sharp (programming language)|C#]] programming language also allows for directives, even though they cannot be used for creating macros, and is generally more intended for features such as conditional compilation.<ref>{{cite web|url=https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives|title=C# preprocessor directives|date=14 January 2022 |publisher=Microsoft}}</ref> C# seldom requires the use of the directives, for example code inclusion does not require a preprocessor at all (as C# relies on a package/namespace system like Java, no code needs to be "included").

The [[Haskell]] programming language also allows the usage of the C preprocessor, which is invoked by writing <syntaxhighlight lang="Haskell" inline>{-# LANGUAGE CPP #-}</syntaxhighlight> at the top of the file. The accepted preprocessor directives align with those in standard C/C++.

Features of the preprocessor are encoded in [[source code]] as [[Directive (programming)|directives]] that start with <code>#</code>.

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Until [[C++26]], the C++ keywords <code>import</code>, <code>export</code>, and <code>module</code> were partially handled by the preprocessor as well.

The Haskell programming language also accepts C preprocessor directives, which is invoked by writing <syntaxhighlight lang="Haskell" inline>{-# LANGUAGE CPP #-}</syntaxhighlight> at the top of the file. The accepted preprocessor directives align with those in standard C/C++.

Haskell also accepts C preprocessor directives.

=== C# ===