src/etc/natvis/liballoc.natvis

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    <DisplayString>{{ size={len} }}</DisplayString>
    <Expand>
      <Item Name="[size]" ExcludeView="simple">len</Item>
      <Item Name="[capacity]" ExcludeView="simple">buf.cap</Item>
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        <Size>len</Size>
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  <Type Name="alloc::vec_deque::VecDeque&lt;*&gt;">
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          <If Condition="i == head">
            <Break/>
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          <Exec>i = (i + 1 == buf.cap ? 0 : i + 1)</Exec>
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    </Expand>
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    <DisplayString>{{ size={len} }}</DisplayString>
    <Expand>
      <LinkedListItems>
        <Size>len</Size>
        <HeadPointer>*(alloc::linked_list::Node&lt;$T1&gt; **)&amp;head</HeadPointer>
        <NextPointer>*(alloc::linked_list::Node&lt;$T1&gt; **)&amp;next</NextPointer>
        <ValueNode>element</ValueNode>
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    <DisplayString>{*(char**)this,[vec.len]s8}</DisplayString>
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