kotlin - Kotlin 内联属性的用例有哪些？

Question

作为属性的 getter 或 setter 通常没有函数作为参数，reified类型，使用 inline 属性有什么好处/用例？

如果好处是降低与方法调用相关的成本，为什么不默认将所有属性 getter/setter 内联？

Kotlin Inline Properties

例如。

val foo: Foo
    inline get() = Foo()

var bar: Bar
    get() = ...
    inline set(v) { ... }

Answer 1

这里是内联属性 discussion :

Example of reified type parameter:

inline val <reified T : PsiElement> T.nextSiblingOfSameType: T?
    get() = PsiTreeUtil.getNextSiblingOfType(this, T::class.java)

Another use case is to hide some properties from the binary interface of a library. In Kotlin standard library, together with the @InlineOnly annotation this might make it possible in the future to exclude declarations of such properties from class files, reducing method count, this will mostly benefit Android with it's 64K method limit.