``` val returnValue = ConstantExpressionEvaluator(...

# kontributors

[shiraji]

val returnValue = ConstantExpressionEvaluator(DefaultBuiltIns.Instance).evaluateExpression(targetExpression, BindingTraceContext(), targetExpression.getType(targetExpression.analyze()) ?: return)
println(returnValue)

This print null, where targetExpression is KtBinaryExpression.