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<head><title>Print -- top level method for printing results</title>
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<div><h1>Print -- top level method for printing results</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>X#{Standard,Print} = f</tt></div>
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<li><div class="single">Inputs:<ul><li><span><tt>X</tt>, <span>a <a href="___Type.html">type</a></span></span></li>
<li><span><tt>f</tt>, <span>a <a href="___Function.html">function</a></span>, that can print something of type <tt>X</tt></span></li>
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<li><div class="single">Consequences:<ul><li>at top level, whenever it is time to print an output value of type <tt>X</tt>, the function <tt>f</tt> will be called</li>
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<div class="single"><h2>Description</h2>
<div>The function <tt>f</tt> is responsible for printing the output prompt and for applying the <a href="___Before__Print.html" title="top level method applied before printing results">BeforePrint</a> and <a href="___After__Print.html" title="top level method applied after printing">AfterPrint</a> methods, if desired.<table class="examples"><tr><td><pre>i1 : code Thing#{Standard,Print}
o1 = /builddir/build/BUILD/Macaulay2-1.3.1-r10737/Macaulay2/m2/robust.m2:130:28-146:19: --source code:
Thing#{Standard,Print} = x -> (
oprompt := concatenate(interpreterDepth:"o", toString lineNumber, " = ");
save := printWidth;
if printWidth != 0 then printWidth = printWidth - #oprompt;
z := robustNet x;
wrapper := lookup(symbol Wrap,class x);
if wrapper =!= null then (
fun := () -> z = wrapper z;
try timelimit(printingTimeLimit, fun)
else (
alarm 0;
global debugError <- fun;
stderr << "--error or time limit reached in applying Wrap method to output; type 'debugError()' to see it" << endl << endl);
);
<< endl << oprompt << z << endl;
printWidth = save;
)</pre>
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<div class="waystouse"><h2>For the programmer</h2>
<p>The object <a href="___Print.html" title="top level method for printing results">Print</a> is <span>a <a href="___Symbol.html">symbol</a></span>.</p>
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