<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"> <link rel="Start" href="index.html"> <link rel="previous" href="Sort.html"> <link rel="next" href="StdLabels.html"> <link rel="Up" href="index.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="Arg" rel="Chapter" href="Arg.html"> <link title="Arith_status" rel="Chapter" href="Arith_status.html"> <link title="Array" rel="Chapter" href="Array.html"> <link title="ArrayLabels" rel="Chapter" href="ArrayLabels.html"> <link title="Big_int" rel="Chapter" 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href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Stack</title> </head> <body> <div class="navbar"><a href="Sort.html">Previous</a> <a href="index.html">Up</a> <a href="StdLabels.html">Next</a> </div> <center><h1>Module <a href="type_Stack.html">Stack</a></h1></center> <br> <pre><span class="keyword">module</span> Stack: <code class="code"><span class="keyword">sig</span></code> <a href="Stack.html">..</a> <code class="code"><span class="keyword">end</span></code></pre>Last-in first-out stacks. <p> This module implements stacks (LIFOs), with in-place modification.<br> <hr width="100%"> <pre><span id="TYPEt"><span class="keyword">type</span> <code class="type">'a</code> t</span> </pre> <div class="info"> The type of stacks containing elements of type <code class="code"><span class="keywordsign">'</span>a</code>.<br> </div> <pre><span id="EXCEPTIONEmpty"><span class="keyword">exception</span> Empty</span></pre> <div class="info"> Raised when <a href="Stack.html#VALpop"><code class="code"><span class="constructor">Stack</span>.pop</code></a> or <a href="Stack.html#VALtop"><code class="code"><span class="constructor">Stack</span>.top</code></a> is applied to an empty stack.<br> </div> <pre><span id="VALcreate"><span class="keyword">val</span> create</span> : <code class="type">unit -> 'a <a href="Stack.html#TYPEt">t</a></code></pre><div class="info"> Return a new stack, initially empty.<br> </div> <pre><span id="VALpush"><span class="keyword">val</span> push</span> : <code class="type">'a -> 'a <a href="Stack.html#TYPEt">t</a> -> unit</code></pre><div class="info"> <code class="code">push x s</code> adds the element <code class="code">x</code> at the top of stack <code class="code">s</code>.<br> </div> <pre><span id="VALpop"><span class="keyword">val</span> pop</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> 'a</code></pre><div class="info"> <code class="code">pop s</code> removes and returns the topmost element in stack <code class="code">s</code>, or raises <code class="code"><span class="constructor">Empty</span></code> if the stack is empty.<br> </div> <pre><span id="VALtop"><span class="keyword">val</span> top</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> 'a</code></pre><div class="info"> <code class="code">top s</code> returns the topmost element in stack <code class="code">s</code>, or raises <code class="code"><span class="constructor">Empty</span></code> if the stack is empty.<br> </div> <pre><span id="VALclear"><span class="keyword">val</span> clear</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> unit</code></pre><div class="info"> Discard all elements from a stack.<br> </div> <pre><span id="VALcopy"><span class="keyword">val</span> copy</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> 'a <a href="Stack.html#TYPEt">t</a></code></pre><div class="info"> Return a copy of the given stack.<br> </div> <pre><span id="VALis_empty"><span class="keyword">val</span> is_empty</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> bool</code></pre><div class="info"> Return <code class="code"><span class="keyword">true</span></code> if the given stack is empty, <code class="code"><span class="keyword">false</span></code> otherwise.<br> </div> <pre><span id="VALlength"><span class="keyword">val</span> length</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -> int</code></pre><div class="info"> Return the number of elements in a stack.<br> </div> <pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">('a -> unit) -> 'a <a href="Stack.html#TYPEt">t</a> -> unit</code></pre><div class="info"> <code class="code">iter f s</code> applies <code class="code">f</code> in turn to all elements of <code class="code">s</code>, from the element at the top of the stack to the element at the bottom of the stack. The stack itself is unchanged.<br> </div> </body></html>