°) alas not in GnuEmacs. XEmacs had "raw strings", but became abandon-ware.

While it does not provide raw strings, I've always found the rx macro to offer a very neat solution for building complicated regular expressions, somewhat akin to Perl's /x flag:

(rx "\\x2"
    (one-or-more nonl)
    "\\x4")

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In reply to Re^2: Regex Search String in a Variable by johnaj
in thread Regex Search String in a Variable by roho

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