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<title>14.1.7 Finding the exported template definition </title>
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<a name="1207769"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">14.1.7 Finding the exported template definition</font>
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<a name="1207770"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">An instantiation of an exported template involves at least two translation units: one which requires the instantiation, and one which contains the template definition.</font>
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<a name="1207771"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">When a file containing definitions of exported templates is compiled, a file with a "<font size=2 face=Courier><strong>.et</strong></font>" suffix is created in the same directory as the object file. The "<font size=2 face=Courier><strong>.et</strong></font>" files are used later by the front end to find the translation unit that defines a given exported template.</font>
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<a name="1207772"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">When a file that potentially makes use of exported templates is compiled, the compiler must be told where to look for "<font size=2 face=Courier><strong>.et</strong></font>" files for exported templates used by a given translation unit. By default, the compiler looks in the current directory. Other directories may be specified with the <font size=2 face=Courier><strong>-export-dir</strong></font> option. The "<font size=2 face=Courier><strong>.et</strong></font>" files are needed when it comes time to generate an instantiation.</font>
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<a name="1207773"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The "<font size=2 face=Courier><strong>.et</strong></font>" files only inform the front end about the location of exported template definitions; they do not actually contain those definitions. The sources containing the exported template definitions must therefore be made available at the time of instantiation. In particular, the export facility is <strong>not</strong><font face="Verdana, Arial, Helvetica, sans-serif"><i> </i></font>a mechanism for avoiding the publication of template definitions in source form.</font>
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