IsCustomFunction()

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Determines whether a name represents a custom function / UDF

IsCustomFunction( name=any, type=string );

Returns: Boolean

Argument Description
name
any, required 		edit

Name of a custom function. Must not be in quotation marks. If not a defined variable or function name, Lucee generates an error.
type
string, optional 		edit

Limit to a specific type:

  • closure
  • lambda
  • udf

If not specified, all custom function types are accepted.

Introduced: 5.0.0.0

Examples

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writeDump(isCustomFunction(realUDF));
writeDump(isCustomFunction(xxx));
testFun = realUDF;
X = 1;
writeDump(isCustomFunction(testFun));
writeDump(isCustomFunction(X))
function realUDF() {
	return 1;
}
function xxx(void) {}

See also