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---
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layout: default
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title: "Storing"
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parent: Normal
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ancestor: Funcons-beta
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---
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[Funcons-beta] : [Storing.cbs]
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-----------------------------
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### Storing
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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_locations">locations</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_locs">locs</a></span>
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<i class="keyword">Type</i> <span class="name"><a href="#Name_stores">stores</a></span>
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<i class="keyword">Entity</i> <span class="name"><a href="#Name_store">store</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_initialise-storing">initialise-storing</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_store-clear">store-clear</a></span>
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<i class="keyword">Datatype</i> <span class="name"><a href="#Name_variables">variables</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_vars">vars</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_variable">variable</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_var">var</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_alloc">alloc</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_recycle">recycle</a></span>
|
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_init">init</a></span>
|
||||
<i class="keyword">Funcon</i> <span class="name"><a href="#Name_allocate-initialised-variable">allocate-initialised-variable</a></span> <i class="keyword">Alias</i> <span class="name"><a href="#Name_alloc-init">alloc-init</a></span>
|
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_assign">assign</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_assigned">assigned</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_current-value">current-value</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_un-assign">un-assign</a></span>
|
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_structural-assign">structural-assign</a></span>
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<i class="keyword">Funcon</i> <span class="name"><a href="#Name_structural-assigned">structural-assigned</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_T"><i class="var">T</i></span>, <span id="PartVariable_T'"><i class="var">T′</i></span> <: <span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span></code></pre></div>
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#### Stores
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Type</i>
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<span class="name"><span id="Name_locations">locations</span></span> ~> <span class="name"><a href="../Generating/index.html#Name_atoms">atoms</a></span>
|
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<i class="keyword">Alias</i>
|
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<span class="name"><span id="Name_locs">locs</span></span> = <span class="name"><a href="#Name_locations">locations</a></span></code></pre></div>
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A storage location is represented by an atom.
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|
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|
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|
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Type</i>
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<span class="name"><span id="Name_stores">stores</span></span> ~> <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(<span class="name"><a href="#Name_locations">locations</a></span>, <span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span><sup class="sup">?</sup>)</code></pre></div>
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The domain of a store is the set of currently allocated locations.
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Mapping a location to <code>( )</code> models the absence of its stored value;
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removing it from the store allows it to be re-allocated.
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Entity</i>
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< _ , <span class="ent-name"><span id="Name_store">store</span></span>(_:<span class="name"><a href="#Name_stores">stores</a></span>) > ---> < _ , <span class="ent-name">store</span>(_:<span class="name">stores</span>) ></code></pre></div>
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The current store is a mutable entity.
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A transition <code>< <i class="var">X</i> , <span class="ent-name"><a href="#Name_store">store</a></span>(<i class="var">Sigma</i>) > ---> < <span id="Variable239_X'"><i class="var">X′</i></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable246_Sigma'"><i class="var">Sigma′</i></span>) ></code> models
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a step from <code><i class="var">X</i></code> to <code><i class="var">X′</i></code> where the difference between <code><i class="var">Sigma</i></code> and <code><i class="var">Sigma′</i></code>
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(if any) corresponds to storage effects.
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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_store-clear">store-clear</span></span> : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span>
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<i class="keyword">Rule</i>
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< <span class="name"><a href="#Name_store-clear">store-clear</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(_) > ---> < <span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map">map</a></span>( )) ></code></pre></div>
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<code><span class="name"><a href="#Name_store-clear">store-clear</a></span></code> ensures the store is empty.
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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_initialise-storing">initialise-storing</span></span>(<span id="Variable392_X"><i class="var">X</i></span>:=><span id="Variable397_T"><i class="var">T</i></span>) : =><span id="Variable412_T"><i class="var">T</i></span>
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~> <span class="name"><a href="../Flowing/index.html#Name_sequential">sequential</a></span>(<span class="name"><a href="#Name_store-clear">store-clear</a></span>,
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<span class="name"><a href="../Giving/index.html#Name_initialise-giving">initialise-giving</a></span>(<span class="name"><a href="../Generating/index.html#Name_initialise-generating">initialise-generating</a></span>(<a href="#Variable392_X"><i class="var">X</i></a>)))
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<i class="keyword">Alias</i>
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<span class="name"><span id="Name_init-storing">init-storing</span></span> = <span class="name"><a href="#Name_initialise-storing">initialise-storing</a></span></code></pre></div>
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<code><span class="name"><a href="#Name_initialise-storing">initialise-storing</a></span>(<i class="var">X</i>)</code> ensures that the entities used by the funcons for
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storing are properly initialised.
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#### Simple variables
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Simple variables may store primitive or structured values. The type of
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values stored by a variable is fixed when it is allocated. For instance,
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<code><span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<span class="name"><a href="../../../Values/Primitive/Integers/index.html#Name_integers">integers</a></span>)</code> allocates a simple integer variable, and
|
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<code><span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<span class="name"><a href="../../../Values/Composite/Vectors/index.html#Name_vectors">vectors</a></span>(<span class="name"><a href="../../../Values/Primitive/Integers/index.html#Name_integers">integers</a></span>))</code> allocates a structured variable for
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storing vectors of integers, which can be updated only monolithically.
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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_variables">variables</span></span> ::= <span id="Name_variable">variable</span>(_:<span class="name"><a href="#Name_locations">locations</a></span>, _:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_value-types">value-types</a></span>)
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<i class="keyword">Alias</i>
|
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<span class="name"><span id="Name_vars">vars</span></span> = <span class="name"><a href="#Name_variables">variables</a></span></code></pre></div>
|
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|
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<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Alias</i>
|
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<span class="name"><span id="Name_var">var</span></span> = <span class="name"><a href="#Name_variable">variable</a></span></code></pre></div>
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<code><span class="name"><a href="#Name_variables">variables</a></span></code> is the type of simple variables that can store values of
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a particular type.
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<code><span class="name"><a href="#Name_variable">variable</a></span>(<i class="var">L</i>, <i class="var">T</i>)</code> constructs a simple variable for storing values of
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type <code><i class="var">T</i></code> at location <code><i class="var">L</i></code>. Variables at different locations are independent.
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Note that <code><span class="name"><a href="#Name_variables">variables</a></span></code> is a subtype of <code><span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span></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_allocate-variable">allocate-variable</span></span>(<span id="Variable676_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>) : =><span class="name"><a href="#Name_variables">variables</a></span>
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<i class="keyword">Alias</i>
|
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<span class="name"><span id="Name_alloc">alloc</span></span> = <span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span></code></pre></div>
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<code><span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<i class="var">T</i>)</code> gives a simple variable whose location is not in the
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current store. Subsequent uses of <code><span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<i class="var">T′</i>)</code> give independent
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variables, except after <code><span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<i class="var">V</i>,...)</code> or <code><span class="name"><a href="#Name_store-clear">store-clear</a></span></code>.
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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="../Generating/index.html#Name_use-atom-not-in">use-atom-not-in</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable898_Sigma"><i class="var">Sigma</i></a>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable898_Sigma"><i class="var">Sigma</i></a>) > ---> < <span id="Variable818_L"><i class="var">L</i></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable825_Sigma'"><i class="var">Sigma′</i></span>) >
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<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-override">map-override</a></span>({<a href="#Variable818_L"><i class="var">L</i></a> |-> ( )}, <a href="#Variable825_Sigma'"><i class="var">Sigma′</i></a>) ~> <span id="Variable870_Sigma''"><i class="var">Sigma′′</i></span>
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-------------------------------------------------------------------------
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< <span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<span id="Variable883_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable898_Sigma"><i class="var">Sigma</i></span>) >
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---> < <span class="name"><a href="#Name_variable">variable</a></span>(<a href="#Variable818_L"><i class="var">L</i></a>, <a href="#Variable883_T"><i class="var">T</i></a>) , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable870_Sigma''"><i class="var">Sigma′′</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_recycle-variables">recycle-variables</span></span>(_:<span class="name"><a href="#Name_variables">variables</a></span><sup class="sup">+</sup>) : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span>
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<i class="keyword">Alias</i>
|
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<span class="name"><span id="Name_recycle">recycle</span></span> = <span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span></code></pre></div>
|
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||||
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<code><span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<i class="var">Var</i>,...)</code> removes the locations of <code><i class="var">Var</i></code>, ..., from the
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current store, so that they may subsequently be re-allocated.
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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="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable1056_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable1086_Sigma"><i class="var">Sigma</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_true">true</a></span>
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---------------------------------------------------------------------
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< <span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable1056_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable1064_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable1086_Sigma"><i class="var">Sigma</i></span>) >
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---> < <span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-delete">map-delete</a></span>(<a href="#Variable1086_Sigma"><i class="var">Sigma</i></a>, {<a href="#Variable1056_L"><i class="var">L</i></a>})) >
|
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<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable1177_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable1207_Sigma"><i class="var">Sigma</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_false">false</a></span>
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---------------------------------------------------------------------
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< <span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable1177_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable1185_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable1207_Sigma"><i class="var">Sigma</i></span>) >
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---> < <span class="name"><a href="../../Abnormal/Failing/index.html#Name_fail">fail</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable1207_Sigma"><i class="var">Sigma</i></a>) >
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<span id="Variable1246_Var"><i class="var">Var</i></span>:<span class="name"><a href="#Name_variables">variables</a></span>, <span id="Variable1255_Var+"><i class="var">Var<sup class="sup">+</sup></i></span>:<span class="name"><a href="#Name_variables">variables</a></span><sup class="sup">+</sup>)
|
||||
~> <span class="name"><a href="../Flowing/index.html#Name_sequential">sequential</a></span>(<span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<a href="#Variable1246_Var"><i class="var">Var</i></a>), <span class="name"><a href="#Name_recycle-variables">recycle-variables</a></span>(<a href="#Variable1255_Var+"><i class="var">Var<sup class="sup">+</sup></i></a>))</code></pre></div>
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_initialise-variable">initialise-variable</span></span>(_:<span class="name"><a href="#Name_variables">variables</a></span>, _:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span>
|
||||
<i class="keyword">Alias</i>
|
||||
<span class="name"><span id="Name_init">init</span></span> = <span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span></code></pre></div>
|
||||
|
||||
|
||||
<code><span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span>(<i class="var">Var</i>, <i class="var">Val</i>)</code> assigns <code><i class="var">Val</i></code> as the initial value of <code><i class="var">Var</i></code>,
|
||||
and gives <code><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span></code>. If <code><i class="var">Var</i></code> already has an assigned value, it fails.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_and">and</a></span>(<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable1510_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable1549_Sigma"><i class="var">Sigma</i></a>)),
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_not">not</a></span> <span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-value">is-value</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable1549_Sigma"><i class="var">Sigma</i></a>, <a href="#Variable1510_L"><i class="var">L</i></a>)),
|
||||
<span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-in-type">is-in-type</a></span>(<a href="#Variable1533_Val"><i class="var">Val</i></a>, <a href="#Variable1518_T"><i class="var">T</i></a>))
|
||||
== <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_true">true</a></span>
|
||||
----------------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable1510_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable1518_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>), <span id="Variable1533_Val"><i class="var">Val</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) ,
|
||||
<span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable1549_Sigma"><i class="var">Sigma</i></span>) > ---> < <span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-override">map-override</a></span>({<a href="#Variable1510_L"><i class="var">L</i></a>|-><a href="#Variable1533_Val"><i class="var">Val</i></a>}, <a href="#Variable1549_Sigma"><i class="var">Sigma</i></a>)) >
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_and">and</a></span>(<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable1699_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable1738_Sigma"><i class="var">Sigma</i></a>)),
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_not">not</a></span> <span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-value">is-value</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable1738_Sigma"><i class="var">Sigma</i></a>, <a href="#Variable1699_L"><i class="var">L</i></a>)),
|
||||
<span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-in-type">is-in-type</a></span>(<a href="#Variable1722_Val"><i class="var">Val</i></a>, <a href="#Variable1707_T"><i class="var">T</i></a>))
|
||||
== <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_false">false</a></span>
|
||||
----------------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable1699_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable1707_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>), <span id="Variable1722_Val"><i class="var">Val</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) ,
|
||||
<span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable1738_Sigma"><i class="var">Sigma</i></span>) > ---> < <span class="name"><a href="../../Abnormal/Failing/index.html#Name_fail">fail</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable1738_Sigma"><i class="var">Sigma</i></a>) ></code></pre></div>
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_allocate-initialised-variable">allocate-initialised-variable</span></span>(<span id="Variable1777_T"><i class="var">T</i></span>, <span id="Variable1783_Val"><i class="var">Val</i></span>:<span id="Variable1787_T"><i class="var">T</i></span>) : =><span class="name"><a href="#Name_variables">variables</a></span>
|
||||
~> <span class="name"><a href="../Giving/index.html#Name_give">give</a></span>(<span class="name"><a href="#Name_allocate-variable">allocate-variable</a></span>(<i class="var">T</i>),
|
||||
<span class="name"><a href="../Flowing/index.html#Name_sequential">sequential</a></span>(<span class="name"><a href="#Name_initialise-variable">initialise-variable</a></span>(<span class="name"><a href="../Giving/index.html#Name_given">given</a></span>, <a href="#Variable1783_Val"><i class="var">Val</i></a>), <span class="name"><a href="../Giving/index.html#Name_given">given</a></span>))
|
||||
<i class="keyword">Alias</i>
|
||||
<span class="name"><span id="Name_alloc-init">alloc-init</span></span> = <span class="name"><a href="#Name_allocate-initialised-variable">allocate-initialised-variable</a></span></code></pre></div>
|
||||
|
||||
|
||||
<code><span class="name"><a href="#Name_allocate-initialised-variable">allocate-initialised-variable</a></span>(<i class="var">T</i>, <i class="var">Val</i>)</code> allocates a simple variable for
|
||||
storing values of type <code><i class="var">T</i></code>, initialises its value to <code><i class="var">Val</i></code>, and returns the
|
||||
variable.
|
||||
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_assign">assign</span></span>(_:<span class="name"><a href="#Name_variables">variables</a></span>, _:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_assign">assign</a></span>(<i class="var">Var</i>, <i class="var">Val</i>)</code> assigns the value <code><i class="var">Val</i></code> to the variable <code><i class="var">Var</i></code>,
|
||||
provided that <code><i class="var">Var</i></code> was allocated with a type that contains <code><i class="var">Val</i></code>.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_and">and</a></span>(<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable2088_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable2127_Sigma"><i class="var">Sigma</i></a>)), <span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-in-type">is-in-type</a></span>(<a href="#Variable2111_Val"><i class="var">Val</i></a>, <a href="#Variable2096_T"><i class="var">T</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_true">true</a></span>
|
||||
-----------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_assign">assign</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2088_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable2096_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>), <span id="Variable2111_Val"><i class="var">Val</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) ,
|
||||
<span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2127_Sigma"><i class="var">Sigma</i></span>) > ---> < <span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-override">map-override</a></span>({<a href="#Variable2088_L"><i class="var">L</i></a>|-><a href="#Variable2111_Val"><i class="var">Val</i></a>}, <a href="#Variable2127_Sigma"><i class="var">Sigma</i></a>)) >
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_and">and</a></span>(<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable2249_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable2288_Sigma"><i class="var">Sigma</i></a>)), <span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-in-type">is-in-type</a></span>(<a href="#Variable2272_Val"><i class="var">Val</i></a>, <a href="#Variable2257_T"><i class="var">T</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_false">false</a></span>
|
||||
--------------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_assign">assign</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2249_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>,<span id="Variable2257_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>), <span id="Variable2272_Val"><i class="var">Val</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) ,
|
||||
<span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2288_Sigma"><i class="var">Sigma</i></span>) > ---> < <span class="name"><a href="../../Abnormal/Failing/index.html#Name_fail">fail</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable2288_Sigma"><i class="var">Sigma</i></a>) ></code></pre></div>
|
||||
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_assigned">assigned</span></span>(_:<span class="name"><a href="#Name_variables">variables</a></span>) : =><span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_assigned">assigned</a></span>(<i class="var">Var</i>)</code> gives the value assigned to the variable <code><i class="var">Var</i></code>,
|
||||
failing if no value is currently assigned.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable2454_Sigma"><i class="var">Sigma</i></a>, <a href="#Variable2424_L"><i class="var">L</i></a>) ~> (<span id="Variable2403_Val"><i class="var">Val</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>)
|
||||
------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_assigned">assigned</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2424_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable2432_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2454_Sigma"><i class="var">Sigma</i></span>) >
|
||||
---> < <a href="#Variable2403_Val"><i class="var">Val</i></a> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable2454_Sigma"><i class="var">Sigma</i></a>) >
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable2555_Sigma"><i class="var">Sigma</i></a>, <a href="#Variable2525_L"><i class="var">L</i></a>) == ( )
|
||||
------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_assigned">assigned</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2525_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable2533_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2555_Sigma"><i class="var">Sigma</i></span>) >
|
||||
---> < <span class="name"><a href="../../Abnormal/Failing/index.html#Name_fail">fail</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable2555_Sigma"><i class="var">Sigma</i></a>) ></code></pre></div>
|
||||
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_current-value">current-value</span></span>(_:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) : =><span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_current-value">current-value</a></span>(<i class="var">V</i>)</code> gives the same result as <code><span class="name"><a href="#Name_assigned">assigned</a></span>(<i class="var">V</i>)</code> when <code><i class="var">V</i></code> is a
|
||||
simple variable, and otherwise gives <code><i class="var">V</i></code>.
|
||||
|
||||
It represents implicit dereferencing of a value that might be a variable.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_current-value">current-value</a></span>(<span id="Variable2686_Var"><i class="var">Var</i></span>:<span class="name"><a href="#Name_variables">variables</a></span>) ~> <span class="name"><a href="#Name_assigned">assigned</a></span>(<a href="#Variable2686_Var"><i class="var">Var</i></a>)
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_current-value">current-value</a></span>(<span id="Variable2716_U"><i class="var">U</i></span>:~<span class="name"><a href="#Name_variables">variables</a></span>) ~> <a href="#Variable2716_U"><i class="var">U</i></a></code></pre></div>
|
||||
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_un-assign">un-assign</span></span>(_:<span class="name"><a href="#Name_variables">variables</a></span>) : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_un-assign">un-assign</a></span>(<i class="var">Var</i>)</code> remove the value assigned to the variable <code><i class="var">Var</i></code>.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable2833_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable2863_Sigma"><i class="var">Sigma</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_true">true</a></span>
|
||||
--------------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_un-assign">un-assign</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2833_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable2841_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2863_Sigma"><i class="var">Sigma</i></span>) >
|
||||
---> < <span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-override">map-override</a></span>({<a href="#Variable2833_L"><i class="var">L</i></a> |-> ( )}, <a href="#Variable2863_Sigma"><i class="var">Sigma</i></a>)) >
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable2958_L"><i class="var">L</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable2988_Sigma"><i class="var">Sigma</i></a>)) == <span class="name"><a href="../../../Values/Primitive/Booleans/index.html#Name_false">false</a></span>
|
||||
--------------------------------------------------------------------------
|
||||
< <span class="name"><a href="#Name_un-assign">un-assign</a></span>(<span class="name"><a href="#Name_variable">variable</a></span>(<span id="Variable2958_L"><i class="var">L</i></span>:<span class="name"><a href="#Name_locations">locations</a></span>, <span id="Variable2966_T"><i class="var">T</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_types">types</a></span>)) , <span class="ent-name"><a href="#Name_store">store</a></span>(<span id="Variable2988_Sigma"><i class="var">Sigma</i></span>) >
|
||||
---> < <span class="name"><a href="../../Abnormal/Failing/index.html#Name_fail">fail</a></span> , <span class="ent-name"><a href="#Name_store">store</a></span>(<a href="#Variable2988_Sigma"><i class="var">Sigma</i></a>) ></code></pre></div>
|
||||
|
||||
|
||||
|
||||
#### Structured variables
|
||||
|
||||
|
||||
Structured variables are structured values where some components are
|
||||
simple variables. Such component variables can be selected using the
|
||||
same funcons as for selecting components of structured values.
|
||||
|
||||
Structured variables containing both simple variables and values correspond
|
||||
to hybrid structures where particular components are mutable.
|
||||
|
||||
All datatypes (except for abstractions) can be used to form structured
|
||||
variables. So can maps, but not sets or multisets.
|
||||
|
||||
Structural generalisations of <code><span class="name"><a href="#Name_assign">assign</a></span>(<i class="var">Var</i>, <i class="var">Val</i>)</code> and
|
||||
<code><span class="name"><a href="#Name_assigned">assigned</a></span>(<i class="var">Var</i>)</code> access all the simple variables contained in a
|
||||
structured variable. Assignment requires each component value of a hybrid
|
||||
structured variable to be equal to the corresponding component of the
|
||||
structured value.
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_structural-assign">structural-assign</span></span>(_:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>, _:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) : =><span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-type">null-type</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<i class="var">V<sub class="sub">1</sub></i>, <i class="var">V<sub class="sub">2</sub></i>)</code> takes a (potentially) structured variable
|
||||
<code><i class="var">V<sub class="sub">1</sub></i></code>and a (potentially) structured value <code><i class="var">V<sub class="sub">2</sub></i></code>. Provided that the structure
|
||||
and all non-variable values in <code><i class="var">V<sub class="sub">1</sub></i></code> match the structure and corresponding
|
||||
values of <code><i class="var">V<sub class="sub">2</sub></i></code>, all the simple variables in <code><i class="var">V<sub class="sub">1</sub></i></code> are assigned the
|
||||
corresponding values of <code><i class="var">V<sub class="sub">2</sub></i></code>; otherwise the assignment fails.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span id="Variable3274_V1"><i class="var">V<sub class="sub">1</sub></i></span>:<span class="name"><a href="#Name_variables">variables</a></span>, <span id="Variable3283_V2"><i class="var">V<sub class="sub">2</sub></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>)
|
||||
~> <span class="name"><a href="#Name_assign">assign</a></span>(<a href="#Variable3274_V1"><i class="var">V<sub class="sub">1</sub></i></a>, <a href="#Variable3283_V2"><i class="var">V<sub class="sub">2</sub></i></a>)
|
||||
<i class="keyword">Rule</i>
|
||||
<a href="#Variable3418_V1"><i class="var">V<sub class="sub">1</sub></i></a> : ~(<span class="name"><a href="#Name_variables">variables</a></span>)
|
||||
<a href="#Variable3418_V1"><i class="var">V<sub class="sub">1</sub></i></a> ~> <span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-value">datatype-value</a></span>(<span id="Variable3346_I1"><i class="var">I<sub class="sub">1</sub></i></span>:<span class="name"><a href="../Binding/index.html#Name_identifiers">identifiers</a></span>, <span id="Variable3356_V1*"><i class="var">V<sub class="sub">1</sub><sup class="sup">*</sup></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup>)
|
||||
<a href="#Variable3427_V2"><i class="var">V<sub class="sub">2</sub></i></a> ~> <span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-value">datatype-value</a></span>(<span id="Variable3382_I2"><i class="var">I<sub class="sub">2</sub></i></span>:<span class="name"><a href="../Binding/index.html#Name_identifiers">identifiers</a></span>, <span id="Variable3392_V2*"><i class="var">V<sub class="sub">2</sub><sup class="sup">*</sup></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup>)
|
||||
-----------------------------------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span id="Variable3418_V1"><i class="var">V<sub class="sub">1</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span>, <span id="Variable3427_V2"><i class="var">V<sub class="sub">2</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span>)
|
||||
~> <span class="name"><a href="../Flowing/index.html#Name_sequential">sequential</a></span>(
|
||||
<span class="name"><a href="../../Abnormal/Failing/index.html#Name_check-true">check-true</a></span>(<span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-equal">is-equal</a></span>(<a href="#Variable3346_I1"><i class="var">I<sub class="sub">1</sub></i></a>, <a href="#Variable3382_I2"><i class="var">I<sub class="sub">2</sub></i></a>)),
|
||||
<span class="name"><a href="../Flowing/index.html#Name_effect">effect</a></span>(<span class="name"><a href="../../../Values/Composite/Tuples/index.html#Name_tuple">tuple</a></span>(<span class="name"><a href="../Giving/index.html#Name_interleave-map">interleave-map</a></span>(
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span class="name"><a href="../../../Values/Composite/Tuples/index.html#Name_tuple-elements">tuple-elements</a></span>(<span class="name"><a href="../Giving/index.html#Name_given">given</a></span>)),
|
||||
<span class="name"><a href="../../../Values/Composite/Tuples/index.html#Name_tuple-zip">tuple-zip</a></span>(<span class="name"><a href="../../../Values/Composite/Tuples/index.html#Name_tuple">tuple</a></span>(<a href="#Variable3356_V1*"><i class="var">V<sub class="sub">1</sub><sup class="sup">*</sup></i></a>), <span class="name"><a href="../../../Values/Composite/Tuples/index.html#Name_tuple">tuple</a></span>(<a href="#Variable3392_V2*"><i class="var">V<sub class="sub">2</sub><sup class="sup">*</sup></i></a>))))),
|
||||
<span class="name"><a href="../../../Values/Primitive/Null/index.html#Name_null-value">null-value</a></span>)</code></pre></div>
|
||||
|
||||
|
||||
Note that simple variables are datatype values.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable3587_M1"><i class="var">M<sub class="sub">1</sub></i></a>) == {}
|
||||
------------------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span id="Variable3587_M1"><i class="var">M<sub class="sub">1</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_,_), <span id="Variable3610_M2"><i class="var">M<sub class="sub">2</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_,_))
|
||||
~> <span class="name"><a href="../../Abnormal/Failing/index.html#Name_check-true">check-true</a></span>(<span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-equal">is-equal</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable3610_M2"><i class="var">M<sub class="sub">2</sub></i></a>), { }))
|
||||
<i class="keyword">Rule</i>
|
||||
<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_some-element">some-element</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable3706_M1"><i class="var">M<sub class="sub">1</sub></i></a>)) ~> <span id="Variable3694_K"><i class="var">K</i></span>
|
||||
----------------------------------------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span id="Variable3706_M1"><i class="var">M<sub class="sub">1</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_, _), <span id="Variable3729_M2"><i class="var">M<sub class="sub">2</sub></i></span>:<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_, _))
|
||||
~> <span class="name"><a href="../Flowing/index.html#Name_sequential">sequential</a></span>(<span class="name"><a href="../../Abnormal/Failing/index.html#Name_check-true">check-true</a></span>(<span class="name"><a href="../../../Values/Composite/Sets/index.html#Name_is-in-set">is-in-set</a></span>(<a href="#Variable3694_K"><i class="var">K</i></a>, <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_dom">dom</a></span>(<a href="#Variable3729_M2"><i class="var">M<sub class="sub">2</sub></i></a>))),
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable3706_M1"><i class="var">M<sub class="sub">1</sub></i></a>, <a href="#Variable3694_K"><i class="var">K</i></a>), <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-lookup">map-lookup</a></span>(<a href="#Variable3729_M2"><i class="var">M<sub class="sub">2</sub></i></a>, <a href="#Variable3694_K"><i class="var">K</i></a>)),
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-delete">map-delete</a></span>(<a href="#Variable3706_M1"><i class="var">M<sub class="sub">1</sub></i></a>, {<a href="#Variable3694_K"><i class="var">K</i></a>}), <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-delete">map-delete</a></span>(<a href="#Variable3729_M2"><i class="var">M<sub class="sub">2</sub></i></a>, {<a href="#Variable3694_K"><i class="var">K</i></a>})))
|
||||
<i class="keyword">Rule</i>
|
||||
<a href="#Variable3945_V1"><i class="var">V<sub class="sub">1</sub></i></a> : ~(<span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span>|<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_, _))
|
||||
---------------------------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assign">structural-assign</a></span>(<span id="Variable3945_V1"><i class="var">V<sub class="sub">1</sub></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>,<span id="Variable3954_V2"><i class="var">V<sub class="sub">2</sub></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>)
|
||||
~> <span class="name"><a href="../../Abnormal/Failing/index.html#Name_check-true">check-true</a></span>(<span class="name"><a href="../../../Values/Value-Types/index.html#Name_is-equal">is-equal</a></span>(<a href="#Variable3945_V1"><i class="var">V<sub class="sub">1</sub></i></a>, <a href="#Variable3954_V2"><i class="var">V<sub class="sub">2</sub></i></a>))</code></pre></div>
|
||||
|
||||
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Funcon</i>
|
||||
<span class="name"><span id="Name_structural-assigned">structural-assigned</span></span>(_:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) : =><span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span></code></pre></div>
|
||||
|
||||
<code><span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<i class="var">V</i>)</code> takes a (potentially) structured variable <code><i class="var">V</i></code>,
|
||||
and computes the value of <code><i class="var">V</i></code> with all simple variables in <code><i class="var">V</i></code> replaced by
|
||||
their assigned values, failing if any of them do not have assigned values.
|
||||
|
||||
When <code><i class="var">V</i></code> is just a simple variable or a (possibly structured) value with no
|
||||
component variables, <code><span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<i class="var">V</i>)</code> gives the same result as
|
||||
<code><span class="name"><a href="#Name_current-value">current-value</a></span>(<i class="var">V</i>)</code>.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span id="Variable4138_Var"><i class="var">Var</i></span>:<span class="name"><a href="#Name_variables">variables</a></span>) ~> <span class="name"><a href="#Name_assigned">assigned</a></span>(<a href="#Variable4138_Var"><i class="var">Var</i></a>)
|
||||
<i class="keyword">Rule</i>
|
||||
<a href="#Variable4222_V"><i class="var">V</i></a> : ~(<span class="name"><a href="#Name_variables">variables</a></span>)
|
||||
<a href="#Variable4222_V"><i class="var">V</i></a> ~> <span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-value">datatype-value</a></span>(<span id="Variable4189_I"><i class="var">I</i></span>:<span class="name"><a href="../Binding/index.html#Name_identifiers">identifiers</a></span>, <span id="Variable4198_V*"><i class="var">V<sup class="sup">*</sup></i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span><sup class="sup">*</sup>)
|
||||
----------------------------------------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span id="Variable4222_V"><i class="var">V</i></span>:<span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span>)
|
||||
~> <span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-value">datatype-value</a></span>(<a href="#Variable4189_I"><i class="var">I</i></a>, <span class="name"><a href="../Giving/index.html#Name_interleave-map">interleave-map</a></span>(<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span class="name"><a href="../Giving/index.html#Name_given">given</a></span>), <a href="#Variable4198_V*"><i class="var">V<sup class="sup">*</sup></i></a>))</code></pre></div>
|
||||
|
||||
|
||||
Note that simple variables are datatype values.
|
||||
|
||||
<div class="highlighter-rouge"><pre class="highlight"><code><i class="keyword">Rule</i>
|
||||
<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span id="Variable4282_M"><i class="var">M</i></span>:<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_, _))
|
||||
~> <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map">map</a></span>(<span class="name"><a href="../Giving/index.html#Name_interleave-map">interleave-map</a></span>(<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span class="name"><a href="../Giving/index.html#Name_given">given</a></span>), <span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_map-elements">map-elements</a></span>(<a href="#Variable4282_M"><i class="var">M</i></a>)))
|
||||
<i class="keyword">Rule</i>
|
||||
<a href="#Variable4387_U"><i class="var">U</i></a> : ~(<span class="name"><a href="../../../Values/Composite/Datatypes/index.html#Name_datatype-values">datatype-values</a></span>|<span class="name"><a href="../../../Values/Composite/Maps/index.html#Name_maps">maps</a></span>(_, _))
|
||||
------------------------------------------
|
||||
<span class="name"><a href="#Name_structural-assigned">structural-assigned</a></span>(<span id="Variable4387_U"><i class="var">U</i></span>:<span class="name"><a href="../../../Values/Value-Types/index.html#Name_values">values</a></span>) ~> <a href="#Variable4387_U"><i class="var">U</i></a></code></pre></div>
|
||||
|
||||
|
||||
|
||||
____
|
||||
|
||||
From the [PLanCompS Project] | [CBS-beta issues...] | [Suggest an improvement...]
|
||||
|
||||
[Storing.cbs]: Storing.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%20Computations/Normal/Storing/Storing.cbs%0A%0AComment/Query/Issue/Suggestion%3A%0A%0A%0ASignature%3A%0A
|
||||
"GENERATE AN EMAIL TEMPLATE"
|
||||
Reference in New Issue
Block a user