commonMain.io.ktor.http.parsing.GrammarBuilder.kt Maven / Gradle / Ivy
/*
* Copyright 2014-2021 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
*/
package io.ktor.http.parsing
internal class GrammarBuilder {
private val grammars = mutableListOf()
infix fun then(grammar: Grammar): GrammarBuilder {
grammars += grammar
return this
}
infix fun then(value: String): GrammarBuilder {
grammars += StringGrammar(value)
return this
}
operator fun (() -> Grammar).unaryPlus() {
grammars += this()
}
operator fun Grammar.unaryPlus() {
grammars += this
}
operator fun String.unaryPlus() {
grammars += StringGrammar(this)
}
public fun build(): Grammar = if (grammars.size == 1) grammars.first() else SequenceGrammar(grammars)
}
internal fun grammar(block: GrammarBuilder.() -> Unit): Grammar = GrammarBuilder().apply(block).build()