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错误消息和换行符

tag-icon • tag-icon errors tex-core punctuation
错误消息和换行符

!以下错误信息中，为什么感叹号（ ）会重复出现？

\def\error#1#2{%
  \begingroup
  \errhelp{#2}%
  \errmessage{^^J! package Error: #1^^J}%
  \endgroup
}
\error{Stop now.}{Hi, don't go on.}


! 
! package Error: Stop now.

答案1

第一个感叹号是\errmessage单独提供的：

\def\error#1#2{%
  \begingroup
    \errhelp{[ERRHELP: #2]}%
    \errmessage{[ERRMESSAGE: #1]}
  \endgroup
}
\error{Stop now.}{Hi, don't go on.}

文件.log：

This is TeX, Version 3.1415926 (TeX Live 2011)
(./test.tex
! [ERRMESSAGE: Stop now.].
\error ...HELP: #2]}\errmessage {[ERRMESSAGE: #1]}
                                                   \endgroup 
l.7 \error{Stop now.}{Hi, don't go on.}

? h
[ERRHELP: Hi, don't go on.]
? x
No pages of output.
Transcript written on test.log.

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