Variadic macro in the C preprocessor

Redirect to:

This page is a redirect. The following categories are used to track and monitor this redirect:

From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.

With possibilities: This is a redirect from a title that potentially could be expanded into a new article. The topic described by this title may be more detailed than is currently provided on the target page or in a section of that page.
- When the target page becomes too large, or for any reason a new page would be an improvement, this redirect may be replaced with an article, template or other project page that is carved out of the target page. See also {{R to section}} and use together with this rcat when appropriate.
- If the topic of the redirect is not susceptible to expansion, then use other rcats such as {{R to section}} or {{R to list entry}} when appropriate.
- Since a new page may be created, links to this redirect should not be replaced with a direct link to the target page. To make redirects to this page, use {{R avoided double redirect}}.
- {{R printworthy}} should be used together with this template when applied to a redirect in mainspace.
- When used on a template redirect, it will automatically populate Category:Template redirects with possibilities.

To a subtopic: This is a redirect to a subtopic of the redirect's title.
- If the redirect topic is detailed enough to sustain its own article, then use {{R with possibilities}} and {{R printworthy}} in addition. If notability of the subject is supportable, then by all means be bold and convert this redirect into an article about the topic.

When appropriate, protection levels are automatically sensed, described and categorized.