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    <p>You're trying to bring a python idiom into C++. That's unncessary. Use </p> <pre><code>for(int i=initVal;i&lt;range;i+=increment) { /*loop body*/ } </code></pre> <p>to achieve this. In Python, the <code>for(i in xrange(init, rng, increment))</code> form is necessary because Python doesn't provide a simple for loop, only a for-each type construct. So you can iterate only over a sequence or a generator. This is simply unnecessary and almost certainly bad practice in a language that provides a <code>for(;;)</code> syntax.</p> <p>EDIT: As a completely non-recommended aside, the closest I can get to the <code>for i xrange(first, last, inc)</code> syntax in C++ is:</p> <pre><code>#include &lt;cstdio&gt; using namespace std; int xrange(unsigned int last, unsigned int first=0, unsigned int inc=1) { static int i = first; return (i&lt;last)?i+=inc:i=0; } int main() { while(int i=xrange(10, 0, 1)) printf("in loop at i=%d\n",i); } </code></pre> <p>Not that while this loops the correct number of times, i varies from <code>first+inc</code> to <code>last</code> and NOT <code>first</code> to <code>last-inc</code> as in Python. Also, the function can only work reliably with <code>unsigned</code> values, as when <code>i==0</code>, the <code>while</code> loop will exit. Do <em>not</em> use this function. I only added this code here to demonstrate that something of the sort is indeed possible. There are also several other caveats and gotchas (the code won't really work for first!=0 on subsequent function calls, for example)</p>
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    1. POC++ range/xrange equivalent in STL or boost?
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    1. USChinmay Kanchi
    1. USChinmay Kanchi
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      1. VTUpMod
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    1. COew... global static local variables
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      1. USsehe
    2. CO@sehe: yes, it's extremely "ew..." ;)
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      1. USChinmay Kanchi
    3. CO@ChinmayKanchi:I think you're essentially suggesting that boost range adaptors are unnecessary.
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      1. USSyncopated
 

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