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/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.generators.builtins.functions
import org.jetbrains.kotlin.generators.builtins.generateBuiltIns.BuiltInsSourceGenerator
import java.io.PrintWriter
val MAX_PARAM_COUNT = 22
class GenerateFunctions(out: PrintWriter) : BuiltInsSourceGenerator(out) {
override fun getPackage() = "kotlin.jvm.functions"
fun generateTypeParameters(i: Int, variance: Boolean) {
out.print("<")
for (j in 1..i) {
if (variance) out.print("in ")
out.print("P$j, ")
}
generateReturnTypeParameter(variance)
out.print(">")
}
fun generateReturnTypeParameter(variance: Boolean) {
if (variance) out.print("out ")
out.print("R")
}
override fun generateBody() {
for (i in 0..MAX_PARAM_COUNT) {
generateDocumentation(i)
out.print("public interface Function$i")
generateTypeParameters(i, variance = true)
generateSuperClass()
generateFunctionClassBody(i)
}
}
fun generateDocumentation(i: Int) {
val suffix = if (i == 1) "" else "s"
out.println("/** A function that takes $i argument${suffix}. */")
}
fun generateSuperClass() {
out.print(" : Function<")
generateReturnTypeParameter(variance = false)
out.print(">")
}
fun generateFunctionClassBody(i: Int) {
out.println(" {")
generateInvokeSignature(i)
out.println("}")
}
fun generateInvokeSignature(i: Int) {
if (i == 0) {
out.println(" /** Invokes the function. */")
}
else {
val suffix = if (i == 1) "" else "s"
out.println(" /** Invokes the function with the specified argument${suffix}. */")
}
out.print(" public operator fun invoke(")
for (j in 1..i) {
out.print("p$j: P$j")
if (j < i) {
out.print(", ")
}
}
out.println("): R")
}
}
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