SWI-Prolog -- sequence//3

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Grammar rule sequence//3

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  - The SWI-Prolog library
    - library(dcg/high_order): High order grammar operations
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Availability::- use_module(library(dcg/high_order)).

[nondet]sequence(:Element, :Sep, ?List)//

Match or generate a sequence of Element where each pair of elements is separated by Sep. When parsing, a matched Sep commits. The final element is not committed. More formally, it matches the following sequence:

(Element, (Sep,Element)*)?