Scala raw strings error in unicode escape
scala, string, unicode, unicode-escapes
Solution
You appear to be facing issue SI-4706: Unicode literal syntax thwarts common use cases for triple-quotes.
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
Unfortunately, there doesn't seem to be a good way around this if you don't want to disable unicode escapes completely (`-Xno-uescape`, only available until Scala 2.13.1, see PR #8282 and ee8c1ef8).
One of workarounds suggested in the SI-4706 issue is separating the backslash character:
scala> """\""" + """usepackage{X}"""
res1: String = \usepackage{X}
Problem
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} ... ``` Attempts so far include, ``` 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}""" ^ ``` Single double-quoted strings prove unsuccessful as well. Following http://docs.scala-lang.org/overviews/core/string-interpolation.html , a working example includes ``` scala> raw"a\nb" res1: String = a\nb ``` which does not cover unicode cases.