ColdFusion 10 - Creating A Simple Expression Evaluator

evaluate.cfm

<cfscript>


	// I evaluate the given expression in the context of the given
	// context object (for variable look-up).
	evaluateExpression = function( context, expression ){

		// Copy the context object to the look-up.
		structAppend( local, context );

		// Evaluate the expression in the context of the current
		// local scope, which has been augmented with the contents
		// of the context object.
		return( evaluate( expression ) );

	};


	// ------------------------------------------------------ //
	// ------------------------------------------------------ //


	// Create a context object.
	friend = {
		name: "Tricia",
		age: 35
	};


	// Evaluate the expression in the given context.
	condition = evaluateExpression(
		friend,
		"(name eq 'Tricia') && (age gt 30)"
	);

	// Output the evaluated result.
	writeOutput( "Result: " & condition & "<br />" );


	// Evaluate the expression in the given context.
	condition = evaluateExpression(
		friend,
		"len( name ) eq 3"
	);

	// Output the evaluated result.
	writeOutput( "Result: " & condition & "<br />" );


</cfscript>

I wish CF let you specify a scope, it isn't safe to allow an end user to write expressions:
condition = evaluateExpression(
friend,
"SERVER.coldfusion.productversion EQ '2023...

//Result: YES