1STRING-UNDEF(1)             General Commands Manual            STRING-UNDEF(1)
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3NNAAMMEE
4       string-undef - expanding undefined strings
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6DDEESSCCRRIIPPTTIIOONN
7   UUsseerr ddeeffiinneedd ssttrriinngg
8       The sting "mys" is undefined and remains undefined.
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10       Its value is "", and now it is defined, and its value is still "".
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12       After redefining it to "newval", it is of course still defined.
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14       After removing the definition, it is now undefined.
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16   UUsseerr ddeeffiinneedd mmaaccrroo
17       The macro "mym" is undefined.
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19       It has no effect: But now it is defined.
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21       After defining it as: neweffect it is of course still defined.
22
23       After removing the definition, it is now undefined.
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25   RReennaammeedd mmaaccrroo
26       The standard .BR macro is defined, and it wwoorrkkss.
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28       After renaming it, the new name is defined, and wwoorrkkss.
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30   PPrreeddeeffiinneedd ssttrriinngg
31       A predefined string is defined and has the value "(R)".
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33OpenBSD                          April 9, 2018                 STRING-UNDEF(1)
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