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I am processing an input format that can use either @ or \ to introduce inline directives. when a literal @ or \ is in the input, either character can be used to escape either character. IE: @@ or \@ or \\ or @\

Currently, I replace the escape sequences with place holders, then extract directives, then replace the placeholders with the intended literal occurrences of @ and \ in the string.

s/(?<![\\\@])[\\\@]\@/\x11/g; s/(?<![\\\@])[\\\@]\\/\x12/g; while (/[\\\@]([_A-Za-z]+)/) { print "Extracted code '$1'\n"; s/[\\\@]$1//; } s/\x11/\@/g; s/\x12/\\/g;

I'm sure there's a better way, but my search-foo is lacking. And so is my regex-foo. (And there's likely an input file that will break this.)

(and no, it's not LaTeX, despite the similarities)

In reply to better way to escape escapes by RonW

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