Ellipsis (computer programming): Difference between revisions

Revision as of 01:20, 5 March 2024

Revision as of 10:50, 27 May 2024

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[[Python3]] also allows the 3-character ellipsis to be used as an expressive place-holder for code to be inserted later.

In [[Abstract Syntax Notation One]] (ASN.1), the ellipsis is used as an extension marker to indicate the possibility of type extensions in future revisions of a protocol specification. In a type constraint expression like <code>A ::= INTEGER (0..127, ..., 256..511)</code> an ellipsis is used to separate the extension root from extension additions. The definition of type A in version 1 system of the form <code>A ::= INTEGER (0..127, ...)</code> and the definition of type A in version 2 system of the form <code>A ::= INTEGER (0..127, ..., 256..511)</code> constitute an extension series of the same type A in different versions of the same specification. The ellipsis can also be used in compound type definitions to separate the set of fields belonging to the extension root from the set of fields constituting extension additions. Here is an example: <{{code>|2=asn1|1=B ::= SEQUENCE { {{not a typo|a}} INTEGER, b INTEGER, ..., c INTEGER }</code> }} <!-- Is the s.n. ellipsis defined as a "..." trigraph or something else? This paragraph is a matter of syntax, not text *representation*, and therefore is misplaced. --Incnis Mrsi -->

== Variable number of parameters ==