【发布时间】：2023-03-25 05:15:02
【问题描述】：
我想在 Scala REPL 中禁用字符串值的截断。
以下主题建议输入settings.maxPrintString = 0：
How to force interpreter show complete stack trace?
不幸的是，这似乎不适用于 Scala 2.9：
Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_29).
Type in expressions to have them evaluated.
Type :help for more information.
scala> settings.maxPrintString = 0
<console>:10: error: not found: value settings
val $ires0 = settings.maxPrintString
^
<console>:7: error: not found: value settings
settings.maxPrintString = 0
^
有什么需要导入的吗？
我尝试了:power，使settings可用，但似乎不支持maxPrintString：
scala> :power
** Power User mode enabled - BEEP BOOP SPIZ **
** :phase has been set to 'typer'. **
** scala.tools.nsc._ has been imported **
** global._ and definitions._ also imported **
** Try :help, vals.<tab>, power.<tab> **
scala> settings
res0: scala.tools.nsc.Settings =
Settings {
-d = .
-Yrich-exceptions = true
-classpath = bin:lib/*
-encoding = UTF-8
}
scala> settings.maxPrintString = 0
<console>:31: error: value maxPrintString is not a member of scala.tools.nsc.Settings
val $ires9 = settings.maxPrintString
^
<console>:28: error: value maxPrintString is not a member of scala.tools.nsc.Settings
settings.maxPrintString = 0
我看到scala.tools.nsc.InterpreterSettings.maxPrintString 存在，但我不确定如何获取InterpreterSettings 的适当实例以进行修改。
【问题讨论】：
标签： scala read-eval-print-loop