Typed Tuple generator for Kotlin by calling `tuple("Txt", 15)`

tuple-generator.main.kts

@file:DependsOn("com.squareup:kotlinpoet:1.6.0")

import com.squareup.kotlinpoet.*
import java.io.File

val maxParameterCount = 12


fun typeName(it: Int) = (65 + it).toChar().toString()
val tupleClasses = Array(maxParameterCount) {
    TypeSpec.classBuilder("Tuple${it+1}")
            .addModifiers(KModifier.DATA)
            .apply {
                val genericTypes = Array(it+1) {
                    TypeVariableName(typeName(it))
                }
                for ((index, genericType) in genericTypes.withIndex()) {
                    addTypeVariable(genericType)
                }
                primaryConstructor(FunSpec.constructorBuilder()
                        .apply {
                            for (genericType in genericTypes) {
                                addParameter("value${genericType.name}", genericType)
                            }
                        }
                        .build())

                for (genericType in genericTypes) {
                    addProperty(PropertySpec.builder("value${genericType.name}", genericType)
                            .initializer("value${genericType.name}")
                            .build())
                }

            }
            .build()
}


FileSpec.builder("kotlin.tuple", "tuple")
        .apply {
            for(i in 1..maxParameterCount) {
                val genericTypes = Array(i) {
                    TypeVariableName(typeName(it))
                }
                addFunction(FunSpec.builder("tuple")
                        .addModifiers(KModifier.INLINE)
                        .apply {
                            val parameters = genericTypes.map {
                                val parameterName = "value${it.name}"
                                addTypeVariable(it)
                                addParameter(parameterName, it)

                                parameterName
                            }

                            addStatement("return Tuple${i}(${parameters.joinToString()})")
                        }.build())
            }

            for (clazz in tupleClasses) {
                addType(clazz)
            }
        }
        .build()
        .writeTo(File("../src/generated/kotlinpoet/").canonicalFile)