85 lines
8.0 KiB
Markdown
85 lines
8.0 KiB
Markdown
---
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layout: default
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title: "Tuples"
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parent: Composite
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ancestor: Funcons-beta
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---
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[Funcons-beta] : [Tuples.cbs]
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-----------------------------
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### Tuples
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<div class="highlighter-rouge"><pre class="highlight"><code>[
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<i class="keyword">Datatype</i> <span class="name"><a href="#Name_tuples">tuples</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_tuple-elements">tuple-elements</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>
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]</code></pre></div>
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Meta-variables</i>
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<span id="PartVariable_T1"><i class="var">T<sub class="sub">1</sub></i></span>, <span id="PartVariable_T2"><i class="var">T<sub class="sub">2</sub></i></span> <: <span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span>
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<span id="PartVariable_T1+"><i class="var">T<sub class="sub">1</sub><sup class="sup">+</sup></i></span>, <span id="PartVariable_T2+"><i class="var">T<sub class="sub">2</sub><sup class="sup">+</sup></i></span> <: <span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span><sup class="sup">+</sup>
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<span id="PartVariable_T*"><i class="var">T<sup class="sup">*</sup></i></span>, <span id="PartVariable_T1*"><i class="var">T<sub class="sub">1</sub><sup class="sup">*</sup></i></span>, <span id="PartVariable_T2*"><i class="var">T<sub class="sub">2</sub><sup class="sup">*</sup></i></span> <: <span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup></code></pre></div>
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Datatype</i>
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<span class="name"><span id="Name_tuples">tuples</span></span>(<span id="Variable98_T*"><i class="var">T<sup class="sup">*</sup></i></span>) ::= <span id="Name_tuple">tuple</span>(_:<span id="Variable115_T*"><i class="var">T<sup class="sup">*</sup></i></span>)</code></pre></div>
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<code><i class="var">T<sup class="sup">*</sup></i></code> can be any sequence of types, including <code>( )</code> and <code><span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup></code>.
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The values of type <code><span class="name"><a href="#Name_tuples">tuples</a></span>(<i class="var">T<sub class="sub">1</sub></i>, ..., <i class="var">Tn</i>)</code> are of the form <code><span class="name"><a href="#Name_tuple">tuple</a></span>(<i class="var">V<sub class="sub">1</sub></i>, ..., <i class="var">Vn</i>)</code>
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with <code><i class="var">V<sub class="sub">1</sub></i>:<i class="var">T<sub class="sub">1</sub></i></code>, ..., <code><i class="var">Vn</i>:<i class="var">Tn</i></code>.
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
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<span class="name"><span id="Name_tuple-elements">tuple-elements</span></span>(_:<span class="name"><a href="#Name_tuples">tuples</a></span>(<span id="Variable287_T*"><i class="var">T<sup class="sup">*</sup></i></span>)) : =>(<span id="Variable308_T*"><i class="var">T<sup class="sup">*</sup></i></span>)
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<i class="keyword">Rule</i>
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<span class="name"><a href="#Name_tuple-elements">tuple-elements</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>(<span id="Variable324_V*"><i class="var">V<sup class="sup">*</sup></i></span>:<i class="var">T<sup class="sup">*</sup></i>)) ~> <a href="#Variable324_V*"><i class="var">V<sup class="sup">*</sup></i></a></code></pre></div>
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
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<span class="name"><span id="Name_tuple-zip">tuple-zip</span></span>(_:<span class="name"><a href="#Name_tuples">tuples</a></span>(<span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup>), _:<span class="name"><a href="#Name_tuples">tuples</a></span>(<span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup>)) : =>(<span class="name"><a href="#Name_tuples">tuples</a></span>(<span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span>,<span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span>))<sup class="sup">*</sup></code></pre></div>
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<code><span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<i class="var">TV<sub class="sub">1</sub></i>, <i class="var">TV<sub class="sub">2</sub></i>)</code> takes two tuples, and returns the sequence of pairs of
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their elements, provided that they have the same length. If they have
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different lengths, the last elements of the longer sequence are ignored.
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
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<span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>(<span id="Variable458_V1"><i class="var">V<sub class="sub">1</sub></i></span>:<i class="var">T<sub class="sub">1</sub></i>, <span id="Variable472_V1*"><i class="var">V<sub class="sub">1</sub><sup class="sup">*</sup></i></span>:<i class="var">T<sub class="sub">1</sub><sup class="sup">*</sup></i>), <span class="name"><a href="#Name_tuple">tuple</a></span>(<span id="Variable494_V2"><i class="var">V<sub class="sub">2</sub></i></span>:<i class="var">T<sub class="sub">2</sub></i>, <span id="Variable508_V2*"><i class="var">V<sub class="sub">2</sub><sup class="sup">*</sup></i></span>:<i class="var">T<sub class="sub">2</sub><sup class="sup">*</sup></i>))
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~> (<span class="name"><a href="#Name_tuple">tuple</a></span>(<a href="#Variable458_V1"><i class="var">V<sub class="sub">1</sub></i></a>, <a href="#Variable494_V2"><i class="var">V<sub class="sub">2</sub></i></a>), <span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>(<a href="#Variable472_V1*"><i class="var">V<sub class="sub">1</sub><sup class="sup">*</sup></i></a>), <span class="name"><a href="#Name_tuple">tuple</a></span>(<a href="#Variable508_V2*"><i class="var">V<sub class="sub">2</sub><sup class="sup">*</sup></i></a>)))
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<i class="keyword">Rule</i>
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<span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>( ), <span class="name"><a href="#Name_tuple">tuple</a></span>( )) ~> ( )
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<i class="keyword">Rule</i>
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<span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>(<span id="Variable631_V1+"><i class="var">V<sub class="sub">1</sub><sup class="sup">+</sup></i></span>:<i class="var">T<sub class="sub">1</sub><sup class="sup">+</sup></i>), <span class="name"><a href="#Name_tuple">tuple</a></span>( )) ~> ( )
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<i class="keyword">Rule</i>
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<span class="name"><a href="#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="#Name_tuple">tuple</a></span>( ), <span class="name"><a href="#Name_tuple">tuple</a></span>(<span id="Variable680_V2+"><i class="var">V<sub class="sub">2</sub><sup class="sup">+</sup></i></span>:<i class="var">T<sub class="sub">2</sub><sup class="sup">+</sup></i>)) ~> ( )</code></pre></div>
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____
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From the [PLanCompS Project] | [CBS-beta issues...] | [Suggest an improvement...]
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[Tuples.cbs]: Tuples.cbs
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"CBS SOURCE FILE"
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[Funcons-beta]: /CBS-beta/docs/Funcons-beta
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"FUNCONS-BETA"
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[Unstable-Funcons-beta]: /CBS-beta/docs/Unstable-Funcons-beta
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"UNSTABLE-FUNCONS-BETA"
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[Languages-beta]: /CBS-beta/docs/Languages-beta
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"LANGUAGES-BETA"
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[Unstable-Languages-beta]: /CBS-beta/docs/Unstable-Languages-beta
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"UNSTABLE-LANGUAGES-BETA"
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[CBS-beta]: /CBS-beta "CBS-BETA"
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[PLanCompS Project]: https://plancomps.github.io
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"PROGRAMMING LANGUAGE COMPONENTS AND SPECIFICATIONS PROJECT HOME PAGE"
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[CBS-beta issues...]: https://github.com/plancomps/CBS-beta/issues
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"CBS-BETA ISSUE REPORTS ON GITHUB"
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[Suggest an improvement...]: mailto:plancomps@gmail.com?Subject=CBS-beta%20-%20comment&Body=Re%3A%20CBS-beta%20specification%20at%20Values/Composite/Tuples/Tuples.cbs%0A%0AComment/Query/Issue/Suggestion%3A%0A%0A%0ASignature%3A%0A
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"GENERATE AN EMAIL TEMPLATE"
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