Directive (programming): Difference between revisions

Revision as of 13:12, 24 April 2025

Revision as of 21:53, 15 May 2025

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Syntactic constructs similar to C's preprocessor directives, such as [[C Sharp (programming language)|C#]]'s <code>#if</code>, are also typically called "directives", although in these cases there may not be any real preprocessing phase involved.

All preprocessor commands, except for <code>defined</code> (when following a conditional directive), begin with a hash symbol (#). Until [[C++26]], the keywords <code>export</code>, <code>import</code> and <code>module</code> were partially handled by the preprocessor.<ref>{{cite web|url=https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1857r1.html|title=P1857R1 - Modules Dependency Discovery}}</ref>

==History==