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Peter
2023-11-01 09:29:33 +01:00
parent 448147e7da
commit d6c745207b
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32
IBAF-cbs/Funcons-beta/Values/Composite/Records/Records.cbs Normal file
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### Records
[
Datatype records
Funcon record
Funcon record-map
Funcon record-select
]
Meta-variables
T <: values
Datatype
records(T) ::= record(_:maps(identifiers,T))
/*
A value of type `records(T)` contains a map from identifiers to values of
type `T`.
*/
Funcon
record-map(_:records(T)) : =>maps(identifiers,T)
Rule
record-map(record(M:maps(_,_))) ~> M
Funcon
record-select(R:records(T), I:identifiers) : =>T?
~> map-lookup(record-map(R), I)

68
IBAF-cbs/Funcons-beta/Values/Composite/Records/index.md Normal file
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---
layout: default
title: "Records"
parent: Composite
ancestor: Funcons-beta
---
[Funcons-beta] : [Records.cbs]
-----------------------------
### Records
<div class="highlighter-rouge"><pre class="highlight"><code>[
<i class="keyword">Datatype</i> <span class="name"><a href="#Name_records">records</a></span>
<i class="keyword">Funcon</i> <span class="name"><a href="#Name_record">record</a></span>
<i class="keyword">Funcon</i> <span class="name"><a href="#Name_record-map">record-map</a></span>
<i class="keyword">Funcon</i> <span class="name"><a href="#Name_record-select">record-select</a></span>
]</code></pre></div>
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Meta-variables</i>
<span id="PartVariable_T"><i class="var">T</i></span> <: <span class="name"><a href="../../Value-Types/index.html#Name_values">values</a></span></code></pre></div>
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Datatype</i>
<span class="name"><span id="Name_records">records</span></span>(<span id="Variable44_T"><i class="var">T</i></span>) ::= <span id="Name_record">record</span>(_:<span class="name"><a href="../Maps/index.html#Name_maps">maps</a></span>(<span class="name"><a href="../../../Computations/Normal/Binding/index.html#Name_identifiers">identifiers</a></span>,<span id="Variable63_T"><i class="var">T</i></span>))</code></pre></div>
A value of type <code><span class="name"><a href="#Name_records">records</a></span>(<i class="var">T</i>)</code> contains a map from identifiers to values of
type <code><i class="var">T</i></code>.
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
<span class="name"><span id="Name_record-map">record-map</span></span>(_:<span class="name"><a href="#Name_records">records</a></span>(<span id="Variable134_T"><i class="var">T</i></span>)) : =><span class="name"><a href="../Maps/index.html#Name_maps">maps</a></span>(<span class="name"><a href="../../../Computations/Normal/Binding/index.html#Name_identifiers">identifiers</a></span>,<span id="Variable157_T"><i class="var">T</i></span>)
<i class="keyword">Rule</i>
<span class="name"><a href="#Name_record-map">record-map</a></span>(<span class="name"><a href="#Name_record">record</a></span>(<span id="Variable174_M"><i class="var">M</i></span>:<span class="name"><a href="../Maps/index.html#Name_maps">maps</a></span>(_,_))) ~> <a href="#Variable174_M"><i class="var">M</i></a></code></pre></div>
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
<span class="name"><span id="Name_record-select">record-select</span></span>(<span id="Variable217_R"><i class="var">R</i></span>:<span class="name"><a href="#Name_records">records</a></span>(<span id="Variable222_T"><i class="var">T</i></span>), <span id="Variable236_I"><i class="var">I</i></span>:<span class="name"><a href="../../../Computations/Normal/Binding/index.html#Name_identifiers">identifiers</a></span>) : =><span id="Variable253_T?"><i class="var">T<sup class="sup">?</sup></i></span>
~> <span class="name"><a href="../Maps/index.html#Name_map-lookup">map-lookup</a></span>(<span class="name"><a href="#Name_record-map">record-map</a></span>(<a href="#Variable217_R"><i class="var">R</i></a>), <a href="#Variable236_I"><i class="var">I</i></a>)</code></pre></div>
____
From the [PLanCompS Project] | [CBS-beta issues...] | [Suggest an improvement...]
[Records.cbs]: Records.cbs
"CBS SOURCE FILE"
[Funcons-beta]: /CBS-beta/docs/Funcons-beta
"FUNCONS-BETA"
[Unstable-Funcons-beta]: /CBS-beta/docs/Unstable-Funcons-beta
"UNSTABLE-FUNCONS-BETA"
[Languages-beta]: /CBS-beta/docs/Languages-beta
"LANGUAGES-BETA"
[Unstable-Languages-beta]: /CBS-beta/docs/Unstable-Languages-beta
"UNSTABLE-LANGUAGES-BETA"
[CBS-beta]: /CBS-beta "CBS-BETA"
[PLanCompS Project]: https://plancomps.github.io
"PROGRAMMING LANGUAGE COMPONENTS AND SPECIFICATIONS PROJECT HOME PAGE"
[CBS-beta issues...]: https://github.com/plancomps/CBS-beta/issues
"CBS-BETA ISSUE REPORTS ON GITHUB"
[Suggest an improvement...]: mailto:plancomps@gmail.com?Subject=CBS-beta%20-%20comment&Body=Re%3A%20CBS-beta%20specification%20at%20Values/Composite/Records/Records.cbs%0A%0AComment/Query/Issue/Suggestion%3A%0A%0A%0ASignature%3A%0A
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