kotlin REPL 中的粘贴模式/多行代码片段？

Question

给定一个函数的骨架：

fun reformat(
    str: String,
    normalizeCase: Boolean = true,
    upperCaseFirstLetter: Boolean = true,
    divideByCamelHumps: Boolean = false,
    wordSeparator: Char = ' ',
) {
  println("In reformat")
}

我将其粘贴到 kotlin REPL 中，但它抱怨 - 显然是因为没有意识到它被发送了多行代码片段：

>>> fun reformat(
error: parameter name expected
fun reformat(
             ^
error: expecting comma or ')'
fun reformat(
             ^
error: expecting ')'
fun reformat(
             ^

>>>     str: String,
error: expecting an element
    str: String,
       ^
error: expecting an element
    str: String,
               ^

etc ..

scala REPL 中 :paste 的等价物是什么？

Answer 1

看起来 Kotlin REPL 打算从 IDE 开始使用。如果你从 Intellij IDEA 中打开它，它就像一个魅力，允许你多行输入。我没有看到任何允许您从常规 shell 执行相同操作的选项。因此，在您的情况下，您可以在一行中声明一个函数或从文件加载脚本。

Answer 2

我找到了一个项目 - 显然由 JetBrains kotlin 开发人员自己积极改进 解决了这个问题和其他问题：https://github.com/Kotlin/kotlin-interactive-shell。这是他们的帮助

[0] :h
:quit or q                           quit the shell
:load or l <path>                    load file and evaluate
:type or t <expr>                    display the type of an expression without evaluating it
:list or ls                          list defined symbols
:help or h [command]                 print this summary or command-specific help
:paste or p                          enter paste mode
:syntax {on | off}                   syntax highlighting
:prompt [pattern]                    customize prompt
:set                                 set configuration parameter
:conf                                list configuration parameters
:dependsOn <artifact coordinates>    Load dependency from the current set of repositories
:repository <repository coordinates> Add repository for the artifacts lookup
:classpath or cp                     Show current script compilation classpath

特别注意：

[1] :p
// Entering paste mode (ctrl-D to finish)

这正是我要找的。它确实有效（尽管有丑陋的 JDK9 警告）：

[1] :p
// Entering paste mode (ctrl-D to finish)
fun reformat(
    str: String,
    normalizeCase: Boolean = true,
    upperCaseFirstLetter: Boolean = true,
    divideByCamelHumps: Boolean = false,
    wordSeparator: Char = ' ',
) {
  println("In reformat")
}

// Exiting paste mode, now interpreting.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jetbrains.kotlin.com.intellij.util.ReflectionUtil (file:/Users/steve/git/kotlin-interactive-shell/ki-shell/target/ki-shell-0.4-SNAPSHOT-shaded.jar) to method java.util.ResourceBundle.setParent(java.util.ResourceBundle)
WARNING: Please consider reporting this to the maintainers of org.jetbrains.kotlin.com.intellij.util.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2] reformat()
ERROR No value passed for parameter 'str' (Line_3.kts:1:10)
[3] reformat("abc")
In reformat

kotlin REPL 中的粘贴模式/多行代码片段？

Paste mode / multi-line-snippet in the kotlin REPL?

kotlin

paste

read-eval-print-loop