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<a name="Reentrant-Example-1"></a>
<h3 class="section">19.3 Reentrant Example</h3>

<p>First, an example of a reentrant scanner:
<a name="index-reentrant_002c-example-of"></a>
</p><div class="example">
<pre class="verbatim">    /* This scanner prints &quot;//&quot; comments. */

    %option reentrant stack noyywrap
    %x COMMENT

    %%

    &quot;//&quot;                 yy_push_state( COMMENT, yyscanner);
    .|\n

    &lt;COMMENT&gt;\n          yy_pop_state( yyscanner );
    &lt;COMMENT&gt;[^\n]+      fprintf( yyout, &quot;%s\n&quot;, yytext);

    %%

    int main ( int argc, char * argv[] )
    {
        yyscan_t scanner;

        yylex_init ( &amp;scanner );
        yylex ( scanner );
        yylex_destroy ( scanner );
    return 0;
   }
</pre></div>




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flex-doc 2.6.4-6 / usr / share / doc / flex-doc / html / Reentrant-Example.html
