choice

fun <T> choice(firstPe: EvalPE<T>, secondPe: EvalPE<T>, vararg otherPes: EvalPE<T>): EvalPE<T>

Prioritized choice of parsing expressions. Variants will be checked in the order in which they are placed, this is, firstPe, secondPe, otherPes.first(), ..., otherPes.last(). The first one to be successful will be the result of this operator.

Samples

import io.kpeg.pe.Symbol.Rule
fun main() { 
   //sampleStart 
   // alpha - OK
// beta  - OK
// gamma - OK
// delta - FAIL

choice(
    literal("alpha"),
    literal("beta"),
    literal("gamma"),
) // EvalPE<String> 
   //sampleEnd
}

Sources

JVM source