A modern programming language that makes developers happier.

kotlinlang

I have created:```
class BuiltInFunction&lt;T&gt;(val name: String,
                         override val columnType: ColumnType,
                         vararg val args: Expression&lt;*&gt;) : Function&lt;T&gt;() {
    init {
        validate(name)
    }

    override fun toSQL(queryBuilder: QueryBuilder): String {
        val mergedArgs = args.map { it.toSQL(queryBuilder) }.joinToString(",")
        return "$name($mergedArgs)"
    }

}
internal fun validate(functionName: String) {
    if (functionName.contains("[^a-zA-Z_0-9]".toRegex())) throw IllegalArgumentException("Illegal built in function name: $functionName")
}
```