Unicode转义中的Scala原始字符串错误 [英] Scala raw strings error in unicode escape

问题描述

在Scala字符串中，需要逐字包含以下内容:\usepackage{x}.因此，理想的是

In a Scala String need to include this literal verbatim: \usepackage{x}. Thus, desired would be that for

val s = """ ... \usepackage{X} ... """

println(s)
... \usepackage{X} ...

到目前为止的尝试包括

scala> """\usepackage{X}"""
<console>:1: error: error in unicode escape
       """\usepackage{X}"""
            ^

scala> raw"""\usepackage{X}"""
<console>:1: error: error in unicode escape
       raw"""\usepackage{X}"""
               ^

单双引号字符串也不成功.

Single double-quoted strings prove unsuccessful as well.

跟随 http://docs.scala-lang.org/overviews/core/string-interpolation.html ，一个有效的示例包括

Following http://docs.scala-lang.org/overviews/core/string-interpolation.html , a working example includes

scala> raw"a\nb"
res1: String = a\nb

其中不涉及unicode情况.

which does not cover unicode cases.

推荐答案

您似乎正面临问题 SI-4706 :Unicode文字语法阻碍了三引号的常见用例.

You appear to be facing issue SI-4706: Unicode literal syntax thwarts common use cases for triple-quotes.

在Scala中，不仅在字符或字符串文字内部处理Unicode转义序列.以下代码可能并不明显:

In Scala, unicode escape sequences are processed not only inside character or string literals. It may not be obvious that the following code would work:

scala> 5 \u002B 10
res0: Int = 15

不幸的是，如果您不想完全禁用Unicode转义(-Xno-uescape)，似乎没有解决该问题的好方法.问题中建议的解决方法之一是分隔反斜杠字符:

Unfortunately, there doesn't seem to be a good way around this if you don't want to disable unicode escapes completely (-Xno-uescape). One of workarounds suggested in the issue is separating the backslash character:

scala> """\""" + """usepackage{X}"""
res1: String = \usepackage{X}

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