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 <span class="menu-text"><span class='chapter-number'>1</span>  <span class='chapter-title'>Das Typsystem von Julia</span></span></a>
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<main class="content" id="quarto-document-content">    <div id="nb1" class="cell" data-execution_count="1">
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<div class="sourceCode" id="cb1"><pre class="sourceCode julia cell-code"><code class="sourceCode julia"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="kw">function</span> <span class="fu">show_subtype_tree</span>(T, i<span class="op">=</span><span class="fl">0</span>)</span>
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<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a>    <span class="fu">println</span>(<span class="st">"       "</span><span class="op">^</span>i, T)</span>
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<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a>    <span class="cf">for</span> Ts <span class="op">∈</span> <span class="fu">subtypes</span>(T)</span>
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<span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a>        <span class="fu">show_subtype_tree</span>(Ts, i<span class="op">+</span><span class="fl">1</span>)</span>
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<span id="cb1-5"><a href="#cb1-5" aria-hidden="true" tabindex="-1"></a>    <span class="cf">end</span></span>
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<span id="cb1-6"><a href="#cb1-6" aria-hidden="true" tabindex="-1"></a><span class="kw">end</span></span>
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<span id="cb1-7"><a href="#cb1-7" aria-hidden="true" tabindex="-1"></a></span>
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<span id="cb1-8"><a href="#cb1-8" aria-hidden="true" tabindex="-1"></a><span class="fu">show_subtype_tree</span>(<span class="dt">Number</span>)</span></code></pre></div>
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<div class="cell-output cell-output-stdout">
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<pre class=""><code class=" ansi">Number
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       Complex
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       Real
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              AbstractFloat
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                     BigFloat
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                     Float16
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                     Float32
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                     Float64
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              AbstractIrrational
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                     Irrational
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              Integer
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                     Bool
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                     Signed
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                            BigInt
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                            Int128
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                            Int16
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                            Int32
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                            Int64
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                            Int8
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                     Unsigned
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                            UInt128
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                            UInt16
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                            UInt32
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                            UInt64
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                            UInt8
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              Rational</code></pre>
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<div id="nb2" class="cell" data-execution_count="2">
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<div class="sourceCode" id="cb2"><pre class="sourceCode julia cell-code"><code class="sourceCode julia"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="im">using</span> <span class="bu">AbstractTrees</span></span>
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<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a></span>
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<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a>AbstractTrees.<span class="fu">children</span>(x<span class="op">::</span><span class="dt">Type</span>) <span class="op">=</span> <span class="fu">subtypes</span>(x)</span>
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<span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a><span class="fu">print_tree</span>(<span class="dt">Number</span>)</span></code></pre></div>
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<div class="cell-output cell-output-stdout">
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<pre class=""><code class=" ansi">Number
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├─ Complex
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└─ Real
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   ├─ AbstractFloat
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   │  ├─ BigFloat
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   │  ├─ Float16
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   │  ├─ Float32
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   │  └─ Float64
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   ├─ AbstractIrrational
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   │  └─ Irrational
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   ├─ Integer
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   │  ├─ Bool
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   │  ├─ Signed
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   │  │  ├─ BigInt
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   │  │  ├─ Int128
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   │  │  ├─ Int16
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   │  │  ├─ Int32
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   │  │  ├─ Int64
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   │  │  └─ Int8
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   │  └─ Unsigned
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   │     ├─ UInt128
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   │     ├─ UInt16
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   │     ├─ UInt32
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   │     ├─ UInt64
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   │     └─ UInt8
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   └─ Rational</code></pre>
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<p><span class="hidden" data-render-id="quarto-int-sidebar-title">Julia für Numerik</span> <span class="hidden" data-render-id="quarto-int-navbar-title">Julia für Numerik</span> <span class="hidden" data-render-id="quarto-int-sidebar:/index.html">Was ist Julia?</span> <span class="hidden" data-render-id="quarto-int-sidebar:/chapters/types.html"><span class="chapter-number">1</span>  <span class="chapter-title">Das Typsystem von Julia</span></span> <span class="hidden" data-render-id="footer-left">All content licenced under <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a>.</span> <span class="hidden" data-render-id="footer-right">Created with <a href="https://quarto.org/">Quarto</a><br />
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  const setStyleSentinel = (alternate) => {
 | 
						||
    const value = alternate ? "alternate" : "default";
 | 
						||
    if (!isFileUrl()) {
 | 
						||
      window.localStorage.setItem("quarto-color-scheme", value);
 | 
						||
    } else {
 | 
						||
      localAlternateSentinel = value;
 | 
						||
    }
 | 
						||
  }
 | 
						||
  const getColorSchemeSentinel = () => {
 | 
						||
    if (!isFileUrl()) {
 | 
						||
      const storageValue = window.localStorage.getItem("quarto-color-scheme");
 | 
						||
      return storageValue != null ? storageValue : localAlternateSentinel;
 | 
						||
    } else {
 | 
						||
      return localAlternateSentinel;
 | 
						||
    }
 | 
						||
  }
 | 
						||
  let localAlternateSentinel = 'default';
 | 
						||
  // Dark / light mode switch
 | 
						||
  window.quartoToggleColorScheme = () => {
 | 
						||
    // Read the current dark / light value 
 | 
						||
    let toAlternate = !hasAlternateSentinel();
 | 
						||
    toggleColorMode(toAlternate);
 | 
						||
    setStyleSentinel(toAlternate);
 | 
						||
  };
 | 
						||
  // Ensure there is a toggle, if there isn't float one in the top right
 | 
						||
  if (window.document.querySelector('.quarto-color-scheme-toggle') === null) {
 | 
						||
    const a = window.document.createElement('a');
 | 
						||
    a.classList.add('top-right');
 | 
						||
    a.classList.add('quarto-color-scheme-toggle');
 | 
						||
    a.href = "";
 | 
						||
    a.onclick = function() { try { window.quartoToggleColorScheme(); } catch {} return false; };
 | 
						||
    const i = window.document.createElement("i");
 | 
						||
    i.classList.add('bi');
 | 
						||
    a.appendChild(i);
 | 
						||
    window.document.body.appendChild(a);
 | 
						||
  }
 | 
						||
  // Switch to dark mode if need be
 | 
						||
  if (hasAlternateSentinel()) {
 | 
						||
    toggleColorMode(true);
 | 
						||
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 | 
						||
    toggleColorMode(false);
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						||
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  const icon = "";
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  const anchorJS = new window.AnchorJS();
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						||
  anchorJS.options = {
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						||
    placement: 'right',
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						||
    icon: icon
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						||
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						||
  anchorJS.add('.anchored');
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						||
  const isCodeAnnotation = (el) => {
 | 
						||
    for (const clz of el.classList) {
 | 
						||
      if (clz.startsWith('code-annotation-')) {                     
 | 
						||
        return true;
 | 
						||
      }
 | 
						||
    }
 | 
						||
    return false;
 | 
						||
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						||
  const clipboard = new window.ClipboardJS('.code-copy-button', {
 | 
						||
    text: function(trigger) {
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						||
      const codeEl = trigger.previousElementSibling.cloneNode(true);
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						||
      for (const childEl of codeEl.children) {
 | 
						||
        if (isCodeAnnotation(childEl)) {
 | 
						||
          childEl.remove();
 | 
						||
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 | 
						||
      }
 | 
						||
      return codeEl.innerText;
 | 
						||
    }
 | 
						||
  });
 | 
						||
  clipboard.on('success', function(e) {
 | 
						||
    // button target
 | 
						||
    const button = e.trigger;
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						||
    // don't keep focus
 | 
						||
    button.blur();
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						||
    // flash "checked"
 | 
						||
    button.classList.add('code-copy-button-checked');
 | 
						||
    var currentTitle = button.getAttribute("title");
 | 
						||
    button.setAttribute("title", "Kopiert");
 | 
						||
    let tooltip;
 | 
						||
    if (window.bootstrap) {
 | 
						||
      button.setAttribute("data-bs-toggle", "tooltip");
 | 
						||
      button.setAttribute("data-bs-placement", "left");
 | 
						||
      button.setAttribute("data-bs-title", "Kopiert");
 | 
						||
      tooltip = new bootstrap.Tooltip(button, 
 | 
						||
        { trigger: "manual", 
 | 
						||
          customClass: "code-copy-button-tooltip",
 | 
						||
          offset: [0, -8]});
 | 
						||
      tooltip.show();    
 | 
						||
    }
 | 
						||
    setTimeout(function() {
 | 
						||
      if (tooltip) {
 | 
						||
        tooltip.hide();
 | 
						||
        button.removeAttribute("data-bs-title");
 | 
						||
        button.removeAttribute("data-bs-toggle");
 | 
						||
        button.removeAttribute("data-bs-placement");
 | 
						||
      }
 | 
						||
      button.setAttribute("title", currentTitle);
 | 
						||
      button.classList.remove('code-copy-button-checked');
 | 
						||
    }, 1000);
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						||
    // clear code selection
 | 
						||
    e.clearSelection();
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						||
  });
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						||
  function tippyHover(el, contentFn) {
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						||
    const config = {
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						||
      allowHTML: true,
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      content: contentFn,
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      maxWidth: 500,
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						||
      delay: 100,
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						||
      arrow: false,
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						||
      appendTo: function(el) {
 | 
						||
          return el.parentElement;
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						||
      },
 | 
						||
      interactive: true,
 | 
						||
      interactiveBorder: 10,
 | 
						||
      theme: 'quarto',
 | 
						||
      placement: 'bottom-start'
 | 
						||
    };
 | 
						||
    window.tippy(el, config); 
 | 
						||
  }
 | 
						||
  const noterefs = window.document.querySelectorAll('a[role="doc-noteref"]');
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						||
  for (var i=0; i<noterefs.length; i++) {
 | 
						||
    const ref = noterefs[i];
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						||
    tippyHover(ref, function() {
 | 
						||
      // use id or data attribute instead here
 | 
						||
      let href = ref.getAttribute('data-footnote-href') || ref.getAttribute('href');
 | 
						||
      try { href = new URL(href).hash; } catch {}
 | 
						||
      const id = href.replace(/^#\/?/, "");
 | 
						||
      const note = window.document.getElementById(id);
 | 
						||
      return note.innerHTML;
 | 
						||
    });
 | 
						||
  }
 | 
						||
      let selectedAnnoteEl;
 | 
						||
      const selectorForAnnotation = ( cell, annotation) => {
 | 
						||
        let cellAttr = 'data-code-cell="' + cell + '"';
 | 
						||
        let lineAttr = 'data-code-annotation="' +  annotation + '"';
 | 
						||
        const selector = 'span[' + cellAttr + '][' + lineAttr + ']';
 | 
						||
        return selector;
 | 
						||
      }
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						||
      const selectCodeLines = (annoteEl) => {
 | 
						||
        const doc = window.document;
 | 
						||
        const targetCell = annoteEl.getAttribute("data-target-cell");
 | 
						||
        const targetAnnotation = annoteEl.getAttribute("data-target-annotation");
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						||
        const annoteSpan = window.document.querySelector(selectorForAnnotation(targetCell, targetAnnotation));
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						||
        const lines = annoteSpan.getAttribute("data-code-lines").split(",");
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						||
        const lineIds = lines.map((line) => {
 | 
						||
          return targetCell + "-" + line;
 | 
						||
        })
 | 
						||
        let top = null;
 | 
						||
        let height = null;
 | 
						||
        let parent = null;
 | 
						||
        if (lineIds.length > 0) {
 | 
						||
            //compute the position of the single el (top and bottom and make a div)
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						||
            const el = window.document.getElementById(lineIds[0]);
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						||
            top = el.offsetTop;
 | 
						||
            height = el.offsetHeight;
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						||
            parent = el.parentElement.parentElement;
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						||
          if (lineIds.length > 1) {
 | 
						||
            const lastEl = window.document.getElementById(lineIds[lineIds.length - 1]);
 | 
						||
            const bottom = lastEl.offsetTop + lastEl.offsetHeight;
 | 
						||
            height = bottom - top;
 | 
						||
          }
 | 
						||
          if (top !== null && height !== null && parent !== null) {
 | 
						||
            // cook up a div (if necessary) and position it 
 | 
						||
            let div = window.document.getElementById("code-annotation-line-highlight");
 | 
						||
            if (div === null) {
 | 
						||
              div = window.document.createElement("div");
 | 
						||
              div.setAttribute("id", "code-annotation-line-highlight");
 | 
						||
              div.style.position = 'absolute';
 | 
						||
              parent.appendChild(div);
 | 
						||
            }
 | 
						||
            div.style.top = top - 2 + "px";
 | 
						||
            div.style.height = height + 4 + "px";
 | 
						||
            let gutterDiv = window.document.getElementById("code-annotation-line-highlight-gutter");
 | 
						||
            if (gutterDiv === null) {
 | 
						||
              gutterDiv = window.document.createElement("div");
 | 
						||
              gutterDiv.setAttribute("id", "code-annotation-line-highlight-gutter");
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						||
              gutterDiv.style.position = 'absolute';
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						||
              const codeCell = window.document.getElementById(targetCell);
 | 
						||
              const gutter = codeCell.querySelector('.code-annotation-gutter');
 | 
						||
              gutter.appendChild(gutterDiv);
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						||
            }
 | 
						||
            gutterDiv.style.top = top - 2 + "px";
 | 
						||
            gutterDiv.style.height = height + 4 + "px";
 | 
						||
          }
 | 
						||
          selectedAnnoteEl = annoteEl;
 | 
						||
        }
 | 
						||
      };
 | 
						||
      const unselectCodeLines = () => {
 | 
						||
        const elementsIds = ["code-annotation-line-highlight", "code-annotation-line-highlight-gutter"];
 | 
						||
        elementsIds.forEach((elId) => {
 | 
						||
          const div = window.document.getElementById(elId);
 | 
						||
          if (div) {
 | 
						||
            div.remove();
 | 
						||
          }
 | 
						||
        });
 | 
						||
        selectedAnnoteEl = undefined;
 | 
						||
      };
 | 
						||
      // Attach click handler to the DT
 | 
						||
      const annoteDls = window.document.querySelectorAll('dt[data-target-cell]');
 | 
						||
      for (const annoteDlNode of annoteDls) {
 | 
						||
        annoteDlNode.addEventListener('click', (event) => {
 | 
						||
          const clickedEl = event.target;
 | 
						||
          if (clickedEl !== selectedAnnoteEl) {
 | 
						||
            unselectCodeLines();
 | 
						||
            const activeEl = window.document.querySelector('dt[data-target-cell].code-annotation-active');
 | 
						||
            if (activeEl) {
 | 
						||
              activeEl.classList.remove('code-annotation-active');
 | 
						||
            }
 | 
						||
            selectCodeLines(clickedEl);
 | 
						||
            clickedEl.classList.add('code-annotation-active');
 | 
						||
          } else {
 | 
						||
            // Unselect the line
 | 
						||
            unselectCodeLines();
 | 
						||
            clickedEl.classList.remove('code-annotation-active');
 | 
						||
          }
 | 
						||
        });
 | 
						||
      }
 | 
						||
  const findCites = (el) => {
 | 
						||
    const parentEl = el.parentElement;
 | 
						||
    if (parentEl) {
 | 
						||
      const cites = parentEl.dataset.cites;
 | 
						||
      if (cites) {
 | 
						||
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 | 
						||
          el,
 | 
						||
          cites: cites.split(' ')
 | 
						||
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 | 
						||
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 | 
						||
        return findCites(el.parentElement)
 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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						||
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						||
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						||
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						||
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						||
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						||
          var citeDiv = window.document.createElement('div');
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						||
          citeDiv.classList.add('hanging-indent');
 | 
						||
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						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
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 | 
						||
});
 | 
						||
</script>  </div> <!-- /content -->
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