Custom Robust eval Function

 Note: This function can only be used in a Trusted Macro

This user defined function redefines the standard eval() function, allowing it to be given a zero and not throw an exception.

Macros

Place both of these macros on the same library token.

---

onCampaignLoad

[defineFunction("eval", "evalFunction@this")]

---

---

evalFunction

[h: assert( argCount() == 1, "eval() requires one parameter.")]
[h, if ( arg(0) == 0 ), code:
{
    [h: macro.return = 0]
};{
    [h: macro.return = oldFunction( arg(0) ) ]
}]

---

Alternately, this version also handles the empty string ("") gracefully.

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evalFunction

<!--
[H: assert( argCount() == 1, "eval() requires one parameter.")]
[H, IF( arg(0) == 0 ): macro.return = 0]
[H, IF( arg(0) == "" ): macro.return = ""]
[H, IF( arg(0) != 0 && arg(0) != ""): macro.return = oldFunction( arg(0) )]
-->