Big-Data-HPC-Platform/docs/ECLLanguageReference/ECLR_mods/ExtrSvcs-CONST.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<sect1 id="CONST">
  <title>CONST</title>

  <para><emphasis role="bold">CONST<indexterm>
      <primary>CONST</primary>
    </indexterm><indexterm>
      <primary>CONST Function</primary>
    </indexterm></emphasis></para>

  <para>The <emphasis role="bold">CONST </emphasis>keyword specifies that the
  value passed as a parameter will always be treated as a constant. This is
  essentially a flag that allows the compiler to properly optimize its code
  when declaring external functions.</para>

  <para>Example:</para>

  <programlisting>STRING CatStrings(CONST STRING S1, CONST STRING S2) := S1 + S2;</programlisting>

  <para>See Also: <link linkend="Function_Attributes__Parameter_Passing">Functions (Parameters Passing</link>), <link linkend="SERVICE_Structure">SERVICE Structure</link></para>
</sect1>