Ellipsis (computer programming): Difference between revisions

Revision as of 09:24, 3 September 2020

Revision as of 12:35, 13 November 2021

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Perl and Ruby [[Operator overloading|overload]] the ".." operator in scalar context as a [[flip-flop operator]] - a [[stateful]] [[bistability|bistable]] [[Boolean datatype|Boolean]] test, roughly equivalent to "true while ''x'' but not yet ''y''", similarly to the "," operator in [[Sed (programming language)|sed]] and [[AWK programming language|AWK]].<ref>[http://perldoc.perl.org/perlop.html#Range-Operators-operator%2c-range-range-..-... perlop - perldoc.perl.org<!-- Bot generated title -->]</ref>

The [[GNU Compiler Collection|GNU C]] hascompatible compilers have an extension to the C and C++ language to allow ''case ranges'' in [[switch statement]]s:

<syntaxhighlight lang="C">

switch(u) {

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default: error("not supported!");

}

</syntaxhighlight>

Additionally, GNU C allows a similar range syntax for [[C syntax#Designated initializers|designated initializers]], available in the C language only:

<syntaxhighlight lang="C">

int array[10] = { [0...5] = 1 };

</syntaxhighlight>