org.jetbrains.kotlin.ir.util.transform.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of kotlin-compiler-embeddable Show documentation

the Kotlin compiler embeddable

There is a newer version: 2.1.0-Beta1

Show newest version

/*
 * Copyright 2010-2016 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.ir.util

inline fun  MutableList.transform(transformation: (T) -> T) {
    forEachIndexed { i, item ->
        set(i, transformation(item))
    }
}

/**
 * Transforms a mutable list in place.
 * Each element `it` is replaced with a result of `transformation(it)`,
 * `null` means "keep existing element" (to avoid creating excessive singleton lists).
 */
inline fun  MutableList.transformFlat(transformation: (T) -> List?) {
    var i = 0
    while (i < size) {
        val item = get(i)

        val transformed = transformation(item)

        if (transformed == null) {
            i++
            continue
        }

        addAll(i, transformed)
        i += transformed.size
        removeAt(i)
    }
}