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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Combinations Template</title>
<meta name="viewport" content="width=device-width initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Language" content="en-gb">
<link href="../inweb.css" rel="stylesheet" rev="stylesheet" type="text/css">
</head>
<body>
<nav role="navigation">
<h1><a href="../index.html">
<img src="../docs-src/Figures/Inform.png" height=72">
</a></h1>
<ul><li><a href="../compiler.html">compiler tools</a></li>
<li><a href="../other.html">other tools</a></li>
<li><a href="../extensions.html">extensions and kits</a></li>
<li><a href="../units.html">unit test tools</a></li>
</ul><h2>Extensions</h2><ul>
<li><a href="../basic_inform/index.html">basic_inform</a></li>
<li><a href="../standard_rules/index.html">standard_rules</a></li>
</ul><h2>Kits</h2><ul>
<li><a href="index.html"><span class="selectedlink">BasicInformKit</span></a></li>
<li><a href="../BasicInformExtrasKit/index.html">BasicInformExtrasKit</a></li>
<li><a href="../CommandParserKit/index.html">CommandParserKit</a></li>
<li><a href="../EnglishLanguageKit/index.html">EnglishLanguageKit</a></li>
<li><a href="../WorldModelKit/index.html">WorldModelKit</a></li>
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</nav>
<main role="main">
<!--Weave of 'Combinations Template' generated by 7-->
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../extensions.html">Kits</a></li><li><a href="index.html">BasicInformKit</a></li><li><b>Combinations Template</b></li></ul><p class="purpose">Code to support the combination kind of value constructor.</p>
<ul class="toc"><li><a href="#SP1">&#167;1. Block Format</a></li><li><a href="#SP2">&#167;2. KOV Support</a></li><li><a href="#SP3">&#167;3. Creation</a></li><li><a href="#SP4">&#167;4. Destruction</a></li><li><a href="#SP5">&#167;5. Copying</a></li><li><a href="#SP6">&#167;6. Comparison</a></li><li><a href="#SP7">&#167;7. Hashing</a></li><li><a href="#SP8">&#167;8. Printing</a></li></ul><hr class="tocbar">
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. Block Format. </b>A combination is like a list, but simpler; it has a fixed, usually short,
size. On the other hand, its entries are not all of the same kind as each
other.
</p>
<p class="inwebparagraph">The short block for a combination is simply a pointer to the long block.
This consists of one word to hold the strong kind ID, and then one word
for each entry in the combination. Thus, a triple combination uses 4 words.
</p>
<pre class="display">
<span class="reserved">Constant</span><span class="plain"> </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">; </span><span class="comment">Strong kind ID</span>
<span class="reserved">Constant</span><span class="plain"> </span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain"> = </span><span class="constant">1</span><span class="plain">; </span><span class="comment">List items begin at this entry</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. KOV Support. </b>See the "BlockValues.i6t" segment for the specification of the following
routines.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Support</span><span class="plain"> </span><span class="identifier">task</span><span class="plain"> </span><span class="identifier">arg1</span><span class="plain"> </span><span class="identifier">arg2</span><span class="plain"> </span><span class="identifier">arg3</span><span class="plain">;</span>
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
<span class="identifier">CREATE_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">COMBINATION_TY_Create</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">, </span><span class="identifier">arg2</span><span class="plain">);</span>
<span class="identifier">DESTROY_KOVS</span><span class="plain">: </span><span class="identifier">COMBINATION_TY_Destroy</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">);</span>
<span class="identifier">MAKEMUTABLE_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">1</span><span class="plain">;</span>
<span class="identifier">COPYKIND_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">COMBINATION_TY_CopyKind</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">, </span><span class="identifier">arg2</span><span class="plain">);</span>
<span class="identifier">COPYQUICK_KOVS</span><span class="plain">: </span><span class="reserved">rtrue</span><span class="plain">;</span>
<span class="identifier">COPYSB_KOVS</span><span class="plain">: </span><span class="identifier">BlkValueCopySB1</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">, </span><span class="identifier">arg2</span><span class="plain">);</span>
<span class="identifier">KINDDATA_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">COMBINATION_TY_KindData</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">);</span>
<span class="identifier">EXTENT_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> -1;</span>
<span class="identifier">COPY_KOVS</span><span class="plain">: </span><span class="identifier">COMBINATION_TY_Copy</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">, </span><span class="identifier">arg2</span><span class="plain">, </span><span class="identifier">arg3</span><span class="plain">);</span>
<span class="identifier">COMPARE_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">COMBINATION_TY_Compare</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">, </span><span class="identifier">arg2</span><span class="plain">);</span>
<span class="identifier">HASH_KOVS</span><span class="plain">: </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">COMBINATION_TY_Hash</span><span class="plain">(</span><span class="identifier">arg1</span><span class="plain">);</span>
<span class="identifier">DEBUG_KOVS</span><span class="plain">: </span><span class="reserved">print</span><span class="plain"> </span><span class="string">" = "</span><span class="plain">, (</span><span class="identifier">COMBINATION_TY_Say</span><span class="plain">) </span><span class="identifier">arg1</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="comment">We choose not to respond to: CAST_KOVS, READ_FILE_KOVS, WRITE_FILE_KOVS</span>
<span class="reserved">rfalse</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP3"></a><b>&#167;3. Creation. </b>A combination is like a list, but simpler; it has a fixed, usually short,
size. On the other hand, its entries are not all of the same kind as each
other.
</p>
<p class="inwebparagraph">Combinations are stored as a fixed-sized block of word entries. The first
block is the only header information: a pointer to a further structure in
memory, describing the kind. The subsequent blocks are the actual records.
Thus, a triple \((x, y, z)\) uses 4 words.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Create</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">sb</span><span class="plain"> </span><span class="identifier">long_block</span><span class="plain"> </span><span class="identifier">N</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain"> </span><span class="identifier">v</span><span class="plain">;</span>
<span class="identifier">N</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">);</span>
<span class="identifier">long_block</span><span class="plain"> = </span><span class="identifier">FlexAllocate</span><span class="plain">(</span>
<span class="plain">(</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">+</span><span class="identifier">N</span><span class="plain">)*</span><span class="identifier">WORDSIZE</span><span class="plain">, </span><span class="identifier">COMBINATION_TY</span><span class="plain">, </span><span class="identifier">BLK_FLAG_WORD</span><span class="plain">);</span>
<span class="identifier">BlkValueWrite</span><span class="plain">(</span><span class="identifier">long_block</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">, </span><span class="identifier">kind</span><span class="plain">, </span><span class="reserved">true</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">N</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">KOVIsBlockValue</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">)) </span><span class="identifier">v</span><span class="plain"> = </span><span class="identifier">BlkValueCreate</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">);</span>
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">v</span><span class="plain"> = </span><span class="identifier">DefaultValueOfKOV</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">);</span>
<span class="identifier">BlkValueWrite</span><span class="plain">(</span><span class="identifier">long_block</span><span class="plain">, </span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">+</span><span class="identifier">i</span><span class="plain">, </span><span class="identifier">v</span><span class="plain">, </span><span class="reserved">true</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">BlkValueCreateSB1</span><span class="plain">(</span><span class="identifier">sb</span><span class="plain">, </span><span class="identifier">long_block</span><span class="plain">);</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP4"></a><b>&#167;4. Destruction. </b>If the comb items are themselves block-values, they must all be freed before
the comb itself can be freed.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Destroy</span><span class="plain"> </span><span class="identifier">comb</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">no_items</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain">;</span>
<span class="identifier">kind</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">);</span>
<span class="identifier">no_items</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">no_items</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">KOVIsBlockValue</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">))</span>
<span class="identifier">BlkValueFree</span><span class="plain">(</span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">));</span>
<span class="plain">}</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP5"></a><b>&#167;5. Copying. </b>Again, if the comb contains block-values then they must be duplicated rather
than bitwise copied as pointers.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_CopyKind</span><span class="plain"> </span><span class="reserved">to</span><span class="plain"> </span><span class="identifier">from</span><span class="plain">;</span>
<span class="identifier">BlkValueWrite</span><span class="plain">(</span><span class="reserved">to</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">, </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">from</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">));</span>
<span class="plain">];</span>
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_CopySB</span><span class="plain"> </span><span class="reserved">to</span><span class="plain"> </span><span class="identifier">from</span><span class="plain">;</span>
<span class="identifier">BlkValueCopySB1</span><span class="plain">(</span><span class="reserved">to</span><span class="plain">, </span><span class="identifier">from</span><span class="plain">);</span>
<span class="plain">];</span>
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_KindData</span><span class="plain"> </span><span class="identifier">comb</span><span class="plain">;</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">);</span>
<span class="plain">];</span>
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Copy</span><span class="plain"> </span><span class="identifier">to_comb</span><span class="plain"> </span><span class="identifier">from_comb</span><span class="plain"> </span><span class="identifier">precopied_comb_kov</span><span class="plain"> </span><span class="identifier">no_items</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">nv</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain">;</span>
<span class="comment">kind = BlkValueRead(to_comb, COMBINATION_KIND_F);</span>
<span class="identifier">no_items</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">precopied_comb_kov</span><span class="plain">);</span>
<span class="identifier">BlkValueWrite</span><span class="plain">(</span><span class="identifier">to_comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">, </span><span class="identifier">precopied_comb_kov</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">no_items</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">KOVIsBlockValue</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">)) {</span>
<span class="identifier">nv</span><span class="plain"> = </span><span class="identifier">BlkValueCreate</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">);</span>
<span class="identifier">BlkValueCopy</span><span class="plain">(</span><span class="identifier">nv</span><span class="plain">, </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">from_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">));</span>
<span class="identifier">BlkValueWrite</span><span class="plain">(</span><span class="identifier">to_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">, </span><span class="identifier">nv</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP6"></a><b>&#167;6. Comparison. </b>This is a lexicographic comparison and assumes both combinations have the
same kind.
</p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Compare</span><span class="plain"> </span><span class="identifier">left_comb</span><span class="plain"> </span><span class="identifier">right_comb</span><span class="plain"> </span><span class="identifier">delta</span><span class="plain"> </span><span class="identifier">no_items</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">cf</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain">;</span>
<span class="identifier">kind</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">left_comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">);</span>
<span class="identifier">no_items</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">no_items</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="identifier">cf</span><span class="plain"> = </span><span class="identifier">KOVComparisonFunction</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">cf</span><span class="plain"> == </span><span class="constant">0</span><span class="plain"> </span><span class="reserved">or</span><span class="plain"> </span><span class="identifier">UnsignedCompare</span><span class="plain">) {</span>
<span class="identifier">delta</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">left_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">) -</span>
<span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">right_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">delta</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">delta</span><span class="plain">;</span>
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
<span class="identifier">delta</span><span class="plain"> = </span><span class="identifier">cf</span><span class="plain">(</span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">left_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">),</span>
<span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">right_comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">));</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">delta</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">delta</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="constant">0</span><span class="plain">;</span>
<span class="plain">];</span>
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Distinguish</span><span class="plain"> </span><span class="identifier">left_comb</span><span class="plain"> </span><span class="identifier">right_comb</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">COMBINATION_TY_Compare</span><span class="plain">(</span><span class="identifier">left_comb</span><span class="plain">, </span><span class="identifier">right_comb</span><span class="plain">) == </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">rfalse</span><span class="plain">;</span>
<span class="reserved">rtrue</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP7"></a><b>&#167;7. Hashing. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Hash</span><span class="plain"> </span><span class="identifier">comb</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain"> </span><span class="identifier">no_items</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain">;</span>
<span class="identifier">rv</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
<span class="identifier">kind</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">);</span>
<span class="identifier">no_items</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">);</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">no_items</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="identifier">rv</span><span class="plain"> = </span><span class="identifier">rv</span><span class="plain"> * </span><span class="constant">33</span><span class="plain"> + </span><span class="identifier">GetHashValue</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">, </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">));</span>
<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">rv</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP8"></a><b>&#167;8. Printing. </b></p>
<pre class="display">
<span class="plain">[ </span><span class="identifier">COMBINATION_TY_Say</span><span class="plain"> </span><span class="identifier">comb</span><span class="plain"> </span><span class="identifier">format</span><span class="plain"> </span><span class="identifier">no_items</span><span class="plain"> </span><span class="identifier">v</span><span class="plain"> </span><span class="identifier">i</span><span class="plain"> </span><span class="identifier">kind</span><span class="plain"> </span><span class="identifier">bk</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">comb</span><span class="plain">==0) || (</span><span class="identifier">BlkValueWeakKind</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">) ~= </span><span class="identifier">COMBINATION_TY</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain">;</span>
<span class="identifier">kind</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">COMBINATION_KIND_F</span><span class="plain">);</span>
<span class="identifier">no_items</span><span class="plain"> = </span><span class="identifier">KindBaseArity</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">);</span>
<span class="reserved">print</span><span class="plain"> </span><span class="string">"("</span><span class="plain">;</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">=0: </span><span class="identifier">i</span><span class="plain">&lt;</span><span class="identifier">no_items</span><span class="plain">: </span><span class="identifier">i</span><span class="plain">++) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">i</span><span class="plain">&gt;0) </span><span class="reserved">print</span><span class="plain"> </span><span class="string">", "</span><span class="plain">;</span>
<span class="identifier">bk</span><span class="plain"> = </span><span class="identifier">KindBaseTerm</span><span class="plain">(</span><span class="identifier">kind</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">);</span>
<span class="identifier">v</span><span class="plain"> = </span><span class="identifier">BlkValueRead</span><span class="plain">(</span><span class="identifier">comb</span><span class="plain">, </span><span class="identifier">i</span><span class="plain">+</span><span class="identifier">COMBINATION_ITEM_BASE</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">bk</span><span class="plain"> == </span><span class="identifier">LIST_OF_TY</span><span class="plain">) </span><span class="identifier">LIST_OF_TY_Say</span><span class="plain">(</span><span class="identifier">v</span><span class="plain">, </span><span class="constant">1</span><span class="plain">);</span>
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">PrintKindValuePair</span><span class="plain">(</span><span class="identifier">bk</span><span class="plain">, </span><span class="identifier">v</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">print</span><span class="plain"> </span><span class="string">")"</span><span class="plain">;</span>
<span class="plain">];</span>
</pre>
<p class="inwebparagraph"></p>
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