/*
 * Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package org.jetbrains.kotlin.fir.types

import org.jetbrains.kotlin.fir.declarations.FirValueParameter
import org.jetbrains.kotlin.fir.visitors.FirVisitor

interface FirFunctionTypeRef : FirTypeRefWithNullability {
    val receiverTypeRef: FirTypeRef?

    // May be it should inherit FirFunction?
    val valueParameters: List<FirValueParameter>

    val returnTypeRef: FirTypeRef

    override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R =
        visitor.visitFunctionTypeRef(this, data)

    override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
        receiverTypeRef?.accept(visitor, data)
        returnTypeRef.accept(visitor, data)
        super.acceptChildren(visitor, data)
        for (parameter in valueParameters) {
            parameter.accept(visitor, data)
        }
    }
}


val FirFunctionTypeRef.parametersCount: Int
    get() = if (receiverTypeRef != null)
        valueParameters.size + 1
    else
        valueParameters.size