576 lines
49 KiB
HTML
576 lines
49 KiB
HTML
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:Author: David Goodger
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:Contact: goodger@python.org
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:Date: Date: 2006-05-21 22:44:42 +0200 (Sun, 21 May 2006)
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href="Slidy2/styles/w3c-blue.css" />
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</head>
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<body>
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<div class="background">
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<img id="head-icon" alt="Nimrod logo"
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src="logo2.png" />
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</div>
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<div class="slide">
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<h1 class="title">Interfacing with C/C++</h1>
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</div>
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<div class="slide">
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<h1 id="interfacing-with-c">Interfacing with C</h1><p>2 options</p>
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<ul class="simple"><li>via <tt class="docutils literal"><span class="pre">dynlib</span></tt></li>
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<li>via <tt class="docutils literal"><span class="pre">header</span></tt></li>
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</ul>
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</div>
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<div class="slide">
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<h1 id="dynlib-import">Dynlib import</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_1" class="listing"><span class="Keyword">type</span>
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<span class="Identifier">GtkWidget</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Identifier">data</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Identifier">binary</span><span class="Punctuation">:</span> <span class="Identifier">cfloat</span>
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<span class="Identifier">compatible</span><span class="Punctuation">:</span> <span class="Identifier">char</span>
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<span class="Keyword">proc</span> <span class="Identifier">gtk_image_new</span><span class="Punctuation">(</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">GtkWidget</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">cdecl</span><span class="Punctuation">,</span> <span class="Identifier">dynlib</span><span class="Punctuation">:</span> <span class="StringLit">"libgtk-x11-2.0.so"</span><span class="Punctuation">,</span> <span class="Identifier">importc</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_1')">Select</button>
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</div>
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<div class="slide">
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<h1 id="header-import">Header import</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_2" class="listing"><span class="Keyword">type</span>
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<span class="Identifier">GtkWidget</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importc</span><span class="Punctuation">:</span> <span class="StringLit">"GtkWidget_t"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"<gtk.h>"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Identifier">data</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importc</span><span class="Punctuation">:</span> <span class="StringLit">"Data"</span><span class="Operator">.</span><span class="Punctuation">}</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Identifier">binary</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importc</span><span class="Punctuation">:</span> <span class="StringLit">"Binary"</span><span class="Operator">.</span><span class="Punctuation">}</span><span class="Punctuation">:</span> <span class="Identifier">cfloat</span>
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<span class="Identifier">compatible</span><span class="Punctuation">:</span> <span class="Identifier">char</span>
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<span class="Keyword">proc</span> <span class="Identifier">gtk_image_new</span><span class="Punctuation">(</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">GtkWidget</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">cdecl</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"<gtk.h>"</span><span class="Punctuation">,</span> <span class="Identifier">importc</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">passC</span><span class="Punctuation">:</span> <span class="Identifier">staticExec</span><span class="Punctuation">(</span><span class="StringLit">"pkg-config --cflags gtk"</span><span class="Punctuation">)</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">passL</span><span class="Punctuation">:</span> <span class="Identifier">staticExec</span><span class="Punctuation">(</span><span class="StringLit">"pkg-config --libs gtk"</span><span class="Punctuation">)</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_2')">Select</button>
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</div>
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<div class="slide">
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<h1 id="header-import">Header import</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_3" class="listing"><span class="Keyword">proc</span> <span class="Identifier">printf</span><span class="Punctuation">(</span><span class="Identifier">formatstr</span><span class="Punctuation">:</span> <span class="Identifier">cstring</span><span class="Punctuation">)</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"<stdio.h>"</span><span class="Punctuation">,</span> <span class="Identifier">importc</span><span class="Punctuation">:</span> <span class="StringLit">"printf"</span><span class="Punctuation">,</span> <span class="Identifier">varargs</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Identifier">printf</span><span class="Punctuation">(</span><span class="StringLit">"%s%s"</span><span class="Punctuation">,</span> <span class="StringLit">"Nim strings "</span><span class="Punctuation">,</span> <span class="StringLit">"converted to cstring for you"</span><span class="Punctuation">)</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_3')">Select</button>
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</div>
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<div class="slide">
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<h1 id="data-exchange-with-c">Data exchange with C</h1><table border="1" class="docutils"><tr><th>C type</th><th>Nim type</th></tr>
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<tr><td><tt class="docutils literal"><span class="pre">int</span></tt></td><td><tt class="docutils literal"><span class="pre">cint</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">unsigned long</span></tt></td><td><tt class="docutils literal"><span class="pre">culong</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">float</span></tt></td><td><tt class="docutils literal"><span class="pre">cfloat</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">int x[4]</span></tt></td><td><tt class="docutils literal"><span class="pre">array[4, cint]</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">int*</span></tt></td><td><tt class="docutils literal"><span class="pre">ptr int</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">char*</span></tt></td><td><tt class="docutils literal"><span class="pre">cstring</span></tt></td></tr>
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<tr><td><tt class="docutils literal"><span class="pre">char**</span></tt></td><td><tt class="docutils literal"><span class="pre">cstringArray = ptr array [0..ArrayDummySize, cstring]</span></tt></td></tr>
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</table>
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</div>
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<div class="slide">
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<h1 id="data-exchange-with-c">Data exchange with C</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_4" class="listing"><span class="Keyword">int</span> <span class="Identifier">sum</span><span class="Punctuation">(</span><span class="Keyword">int</span><span class="Operator">*</span> <span class="Identifier">x</span><span class="Punctuation">,</span> <span class="Identifier">size_t</span> <span class="Identifier">len</span><span class="Punctuation">)</span> <span class="Punctuation">{</span>
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<span class="Keyword">int</span> <span class="Identifier">result</span> <span class="Operator">=</span> <span class="DecNumber">0</span><span class="Punctuation">;</span>
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<span class="Keyword">for</span> <span class="Punctuation">(</span><span class="Identifier">size_t</span> <span class="Identifier">i</span> <span class="Operator">=</span> <span class="DecNumber">0</span><span class="Punctuation">;</span> <span class="Identifier">i</span> <span class="Operator"><</span> <span class="Identifier">len</span><span class="Punctuation">;</span> <span class="Identifier">i</span><span class="Operator">++</span><span class="Punctuation">)</span>
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<span class="Identifier">result</span> <span class="Operator">+=</span> <span class="Identifier">x</span><span class="Punctuation">[</span><span class="Identifier">i</span><span class="Punctuation">]</span><span class="Punctuation">;</span>
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<span class="Keyword">return</span> <span class="Identifier">result</span><span class="Punctuation">;</span>
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<span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_4')">Select</button>
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<h1 id="data-exchange-with-c">Data exchange with C</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_5" class="listing"><span class="Keyword">int</span> <span class="Identifier">sum</span><span class="Punctuation">(</span><span class="Keyword">int</span><span class="Operator">*</span> <span class="Identifier">x</span><span class="Punctuation">,</span> <span class="Identifier">size_t</span> <span class="Identifier">len</span><span class="Punctuation">)</span> <span class="Punctuation">{</span>
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<span class="Keyword">int</span> <span class="Identifier">result</span> <span class="Operator">=</span> <span class="DecNumber">0</span><span class="Punctuation">;</span>
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<span class="Keyword">for</span> <span class="Punctuation">(</span><span class="Identifier">size_t</span> <span class="Identifier">i</span> <span class="Operator">=</span> <span class="DecNumber">0</span><span class="Punctuation">;</span> <span class="Identifier">i</span> <span class="Operator"><</span> <span class="Identifier">len</span><span class="Punctuation">;</span> <span class="Identifier">i</span><span class="Operator">++</span><span class="Punctuation">)</span>
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<span class="Identifier">result</span> <span class="Operator">+=</span> <span class="Identifier">x</span><span class="Punctuation">[</span><span class="Identifier">i</span><span class="Punctuation">]</span><span class="Punctuation">;</span>
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<span class="Keyword">return</span> <span class="Identifier">result</span><span class="Punctuation">;</span>
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<span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_5')">Select</button><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_6" class="listing"><span class="Keyword">proc</span> <span class="Identifier">sum</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">cint</span><span class="Punctuation">;</span> <span class="Identifier">len</span><span class="Punctuation">:</span> <span class="Identifier">int</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importc</span><span class="Punctuation">:</span> <span class="StringLit">"sum"</span><span class="Punctuation">,</span> <span class="Identifier">cdecl</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"foo.h"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">callSum</span> <span class="Operator">=</span>
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<span class="Keyword">var</span> <span class="Identifier">x</span> <span class="Operator">=</span> <span class="Operator">@</span><span class="Punctuation">[</span><span class="FloatNumber">1.</span><span class="Identifier">cint</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">,</span> <span class="DecNumber">4</span><span class="Punctuation">]</span>
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<span class="Identifier">echo</span> <span class="Identifier">sum</span><span class="Punctuation">(</span><span class="Keyword">addr</span> <span class="Identifier">x</span><span class="Punctuation">[</span><span class="DecNumber">0</span><span class="Punctuation">]</span><span class="Punctuation">,</span> <span class="Identifier">x</span><span class="Operator">.</span><span class="Identifier">len</span><span class="Punctuation">)</span>
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<span class="Keyword">var</span> <span class="Identifier">y</span> <span class="Operator">=</span> <span class="Punctuation">[</span><span class="FloatNumber">1.</span><span class="Identifier">cint</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">,</span> <span class="DecNumber">4</span><span class="Punctuation">]</span>
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<span class="Identifier">echo</span> <span class="Identifier">sum</span><span class="Punctuation">(</span><span class="Keyword">addr</span> <span class="Identifier">y</span><span class="Punctuation">[</span><span class="DecNumber">0</span><span class="Punctuation">]</span><span class="Punctuation">,</span> <span class="Identifier">y</span><span class="Operator">.</span><span class="Identifier">len</span><span class="Punctuation">)</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_6')">Select</button>
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<h1 id="codegendecl-pragma">CodegenDecl pragma</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_7" class="listing"><span class="Keyword">var</span>
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<span class="Identifier">a</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">codegenDecl</span><span class="Punctuation">:</span> <span class="StringLit">"$# progmem $#"</span><span class="Operator">.</span><span class="Punctuation">}</span><span class="Punctuation">:</span> <span class="Identifier">int</span>
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<span class="Keyword">proc</span> <span class="Identifier">myinterrupt</span><span class="Punctuation">(</span><span class="Punctuation">)</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">codegenDecl</span><span class="Punctuation">:</span> <span class="StringLit">"__interrupt $# $#$#"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span>
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<span class="Identifier">echo</span> <span class="StringLit">"realistic interrupt handler"</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_7')">Select</button>
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</div>
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<h1 id="wrapping-c">Wrapping C++</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_8" class="listing"><span class="Keyword">class</span> <span class="Identifier">Foo</span> <span class="Punctuation">{</span>
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<span class="Keyword">public</span><span class="Punctuation">:</span>
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<span class="Keyword">int</span> <span class="Identifier">value</span><span class="Punctuation">;</span>
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<span class="Keyword">int</span> <span class="Identifier">GetValue</span><span class="Punctuation">(</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Keyword">return</span> <span class="Identifier">value</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Keyword">int</span><span class="Operator">&</span> <span class="Identifier">SetValue</span><span class="Punctuation">(</span><span class="Keyword">int</span> <span class="Identifier">x</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Identifier">field</span> <span class="Operator">=</span> <span class="Identifier">x</span><span class="Punctuation">;</span> <span class="Keyword">return</span> <span class="Operator">&</span><span class="Identifier">field</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Punctuation">}</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_8')">Select</button><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_9" class="listing"><span class="Keyword">type</span>
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<span class="Identifier">Foo</span><span class="Operator">*</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"Foo"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Identifier">value</span><span class="Operator">*:</span> <span class="Identifier">cint</span>
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<span class="Keyword">proc</span> <span class="Identifier">getValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"GetValue"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">setValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">;</span> <span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"SetValue"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_9')">Select</button>
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</div>
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<div class="slide">
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<h1 id="wrapping-c">Wrapping C++</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_10" class="listing"><span class="Keyword">class</span> <span class="Identifier">Foo</span> <span class="Punctuation">{</span>
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<span class="Keyword">public</span><span class="Punctuation">:</span>
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<span class="Keyword">int</span> <span class="Identifier">value</span><span class="Punctuation">;</span>
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<span class="Keyword">int</span> <span class="Identifier">GetValue</span><span class="Punctuation">(</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Keyword">return</span> <span class="Identifier">value</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Keyword">int</span><span class="Operator">&</span> <span class="Identifier">SetValue</span><span class="Punctuation">(</span><span class="Keyword">int</span> <span class="Identifier">x</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Identifier">field</span> <span class="Operator">=</span> <span class="Identifier">x</span><span class="Punctuation">;</span> <span class="Keyword">return</span> <span class="Operator">&</span><span class="Identifier">field</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Punctuation">}</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_10')">Select</button><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_11" class="listing"><span class="Keyword">type</span>
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<span class="Identifier">Foo</span><span class="Operator">*</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"Foo"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Identifier">value</span><span class="Operator">*:</span> <span class="Identifier">cint</span>
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<span class="Keyword">proc</span> <span class="Identifier">getValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"#.GetValue(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">setValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">;</span> <span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"#.SetValue(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_11')">Select</button>
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</div>
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<div class="slide">
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<h1 id="constructors">Constructors</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_12" class="listing"><span class="Keyword">class</span> <span class="Identifier">Foo</span> <span class="Punctuation">{</span>
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<span class="Keyword">public</span><span class="Punctuation">:</span>
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<span class="Keyword">int</span> <span class="Identifier">value</span><span class="Punctuation">;</span>
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<span class="Keyword">int</span> <span class="Identifier">GetValue</span><span class="Punctuation">(</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Keyword">return</span> <span class="Identifier">value</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Keyword">int</span><span class="Operator">&</span> <span class="Identifier">SetValue</span><span class="Punctuation">(</span><span class="Keyword">int</span> <span class="Identifier">x</span><span class="Punctuation">)</span> <span class="Punctuation">{</span> <span class="Identifier">field</span> <span class="Operator">=</span> <span class="Identifier">x</span><span class="Punctuation">;</span> <span class="Keyword">return</span> <span class="Operator">&</span><span class="Identifier">field</span><span class="Punctuation">;</span> <span class="Punctuation">}</span>
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<span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="Keyword">int</span> <span class="Identifier">x</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">field</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">)</span> <span class="Punctuation">{</span><span class="Punctuation">}</span>
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<span class="Punctuation">}</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_12')">Select</button><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_13" class="listing"><span class="Keyword">type</span>
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<span class="Identifier">Foo</span><span class="Operator">*</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"Foo"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Identifier">value</span><span class="Operator">*:</span> <span class="Identifier">cint</span>
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<span class="Keyword">proc</span> <span class="Identifier">getValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"#.GetValue(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">setValue</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">this</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">Foo</span><span class="Punctuation">;</span> <span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">var</span> <span class="Identifier">cint</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"#.SetValue(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">constructFoo</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">Foo</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"Foo(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_13')">Select</button>
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</div>
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<h1 id="constructors">Constructors</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_14" class="listing"><span class="Identifier">Foo</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span>
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<span class="Keyword">auto</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_14')">Select</button>
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</div>
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<h1 id="constructors">Constructors</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_15" class="listing"><span class="Identifier">Foo</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span>
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<span class="Comment">// Calls copy constructor!</span>
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<span class="Keyword">auto</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_15')">Select</button>
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</div>
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<div class="slide">
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<h1 id="constructors">Constructors</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_16" class="listing"><span class="Identifier">Foo</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span>
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<span class="Comment">// Calls copy constructor!</span>
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<span class="Keyword">auto</span> <span class="Identifier">foo</span> <span class="Operator">=</span> <span class="Identifier">Foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span>
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<span class="Identifier">Foo</span> <span class="Identifier">foo</span><span class="Punctuation">(</span><span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="DecNumber">2</span><span class="Punctuation">,</span> <span class="DecNumber">3</span><span class="Punctuation">)</span><span class="Punctuation">;</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_16')">Select</button>
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</div>
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<div class="slide">
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<h1 id="constructors">Constructors</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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2
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</pre></td><td><pre id="listing_17" class="listing"><span class="Keyword">proc</span> <span class="Identifier">constructFoo</span><span class="Operator">*</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Identifier">Foo</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"Foo(@)"</span><span class="Punctuation">,</span> <span class="Identifier">header</span><span class="Punctuation">:</span> <span class="StringLit">"file.h"</span><span class="Punctuation">,</span> <span class="Identifier">constructor</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_17')">Select</button><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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2
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3
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4
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5
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6
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</pre></td><td><pre id="listing_18" class="listing"><span class="Keyword">proc</span> <span class="Identifier">newFoo</span><span class="Punctuation">(</span><span class="Identifier">a</span><span class="Punctuation">,</span> <span class="Identifier">b</span><span class="Punctuation">:</span> <span class="Identifier">cint</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">Foo</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"new Foo(@)"</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">let</span> <span class="Identifier">x</span> <span class="Operator">=</span> <span class="Identifier">newFoo</span><span class="Punctuation">(</span><span class="DecNumber">3</span><span class="Punctuation">,</span> <span class="DecNumber">4</span><span class="Punctuation">)</span>
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<span class="Keyword">proc</span> <span class="Identifier">cnew</span><span class="Operator">*</span><span class="Punctuation">[</span><span class="Identifier">T</span><span class="Punctuation">]</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Identifier">T</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">T</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"(new '*0#@)"</span><span class="Punctuation">,</span> <span class="Identifier">nodecl</span><span class="Operator">.</span><span class="Punctuation">}</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_18')">Select</button>
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</div>
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<div class="slide">
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<h1 id="generics">Generics</h1><p>For example:</p>
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<table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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2
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3
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4
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5
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</pre></td><td><pre id="listing_19" class="listing"><span class="Keyword">type</span> <span class="Identifier">Input</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"System::Input"</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span> <span class="Keyword">object</span>
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<span class="Keyword">proc</span> <span class="Identifier">getSubsystem</span><span class="Operator">*</span><span class="Punctuation">[</span><span class="Identifier">T</span><span class="Punctuation">]</span><span class="Punctuation">(</span><span class="Punctuation">)</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">T</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">importcpp</span><span class="Punctuation">:</span> <span class="StringLit">"SystemManager::getSubsystem<'*0>()"</span><span class="Punctuation">,</span> <span class="Identifier">nodecl</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">let</span> <span class="Identifier">x</span><span class="Punctuation">:</span> <span class="Keyword">ptr</span> <span class="Identifier">Input</span> <span class="Operator">=</span> <span class="Identifier">getSubsystem</span><span class="Punctuation">[</span><span class="Identifier">Input</span><span class="Punctuation">]</span><span class="Punctuation">(</span><span class="Punctuation">)</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_19')">Select</button><p>Produces:</p>
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<table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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</pre></td><td><pre id="listing_20" class="listing"><span class="Identifier">x</span> <span class="Operator">=</span> <span class="Identifier">SystemManager</span><span class="Punctuation">:</span><span class="Punctuation">:</span><span class="Identifier">getSubsystem</span><span class="Operator"><</span><span class="Identifier">System</span><span class="Punctuation">:</span><span class="Punctuation">:</span><span class="Identifier">Input</span><span class="Operator">></span><span class="Punctuation">(</span><span class="Punctuation">)</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_20')">Select</button>
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</div>
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<div class="slide">
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<h1 id="emit-pragma">Emit pragma</h1><table class="line-nums-table"><tbody><tr><td class="blob-line-nums"><pre class="line-nums">1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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</pre></td><td><pre id="listing_21" class="listing"><span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">emit</span><span class="Punctuation">:</span> <span class="LongStringLit">"""
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static int cvariable = 420;
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"""</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">push</span> <span class="Identifier">stackTrace</span><span class="Punctuation">:</span><span class="Identifier">off</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Keyword">proc</span> <span class="Identifier">embedsC</span><span class="Punctuation">(</span><span class="Punctuation">)</span> <span class="Operator">=</span>
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<span class="Keyword">var</span> <span class="Identifier">nimVar</span> <span class="Operator">=</span> <span class="DecNumber">89</span>
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<span class="Comment"># use backticks to access Nim symbols within an emit section:</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">emit</span><span class="Punctuation">:</span> <span class="LongStringLit">"""fprintf(stdout, "%d\n", cvariable + (int)`nimVar`);"""</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">pop</span><span class="Operator">.</span><span class="Punctuation">}</span>
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<span class="Identifier">embedsC</span><span class="Punctuation">(</span><span class="Punctuation">)</span></pre></td></tr></tbody></table><button onclick="copyToClipboard('listing_21')">Select</button>
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</div>
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<div class="slide">
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<h1 id="questions">Questions?</h1>
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</body>
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