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| <div class="section" id="foreach"> |
| <span id="command:foreach"></span><h1>foreach<a class="headerlink" href="#foreach" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>Evaluate a group of commands for each value in a list.</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">foreach</span><span class="p">(</span><span class="n">loop_var</span> <span class="n">arg1</span> <span class="n">arg2</span> <span class="o">...</span><span class="p">)</span> |
| <span class="n">COMMAND1</span><span class="p">(</span><span class="n">ARGS</span> <span class="o">...</span><span class="p">)</span> |
| <span class="n">COMMAND2</span><span class="p">(</span><span class="n">ARGS</span> <span class="o">...</span><span class="p">)</span> |
| <span class="o">...</span> |
| <span class="n">endforeach</span><span class="p">(</span><span class="n">loop_var</span><span class="p">)</span> |
| </pre></div> |
| </div> |
| <p>All commands between foreach and the matching endforeach are recorded |
| without being invoked. Once the endforeach is evaluated, the recorded |
| list of commands is invoked once for each argument listed in the |
| original foreach command. Before each iteration of the loop |
| <code class="docutils literal"><span class="pre">${loop_var}</span></code> will be set as a variable with the current value in the |
| list.</p> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">foreach</span><span class="p">(</span><span class="n">loop_var</span> <span class="n">RANGE</span> <span class="n">total</span><span class="p">)</span> |
| <span class="n">foreach</span><span class="p">(</span><span class="n">loop_var</span> <span class="n">RANGE</span> <span class="n">start</span> <span class="n">stop</span> <span class="p">[</span><span class="n">step</span><span class="p">])</span> |
| </pre></div> |
| </div> |
| <p>Foreach can also iterate over a generated range of numbers. There are |
| three types of this iteration:</p> |
| <ul class="simple"> |
| <li>When specifying single number, the range will have elements 0 to |
| “total”.</li> |
| <li>When specifying two numbers, the range will have elements from the |
| first number to the second number.</li> |
| <li>The third optional number is the increment used to iterate from the |
| first number to the second number.</li> |
| </ul> |
| <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">foreach</span><span class="p">(</span><span class="n">loop_var</span> <span class="n">IN</span> <span class="p">[</span><span class="n">LISTS</span> <span class="p">[</span><span class="n">list1</span> <span class="p">[</span><span class="o">...</span><span class="p">]]]</span> |
| <span class="p">[</span><span class="n">ITEMS</span> <span class="p">[</span><span class="n">item1</span> <span class="p">[</span><span class="o">...</span><span class="p">]]])</span> |
| </pre></div> |
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| <p>Iterates over a precise list of items. The <code class="docutils literal"><span class="pre">LISTS</span></code> option names |
| list-valued variables to be traversed, including empty elements (an |
| empty string is a zero-length list). (Note macro |
| arguments are not variables.) The <code class="docutils literal"><span class="pre">ITEMS</span></code> option ends argument |
| parsing and includes all arguments following it in the iteration.</p> |
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