From fe8cd7597142cc0533411b81dd82cd8ef48ed716 Mon Sep 17 00:00:00 2001 From: Peter Collingbourne Date: Mon, 5 Aug 2013 17:47:59 +0000 Subject: Introduce Regex::isLiteralERE function. This will be used to implement an optimisation for literal entries in special case lists. Differential Revision: http://llvm-reviews.chandlerc.com/D1278 llvm-svn: 187731 --- llvm/lib/Support/Regex.cpp | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'llvm/lib/Support/Regex.cpp') diff --git a/llvm/lib/Support/Regex.cpp b/llvm/lib/Support/Regex.cpp index efc8b90a009..dec967e33f5 100644 --- a/llvm/lib/Support/Regex.cpp +++ b/llvm/lib/Support/Regex.cpp @@ -168,3 +168,10 @@ std::string Regex::sub(StringRef Repl, StringRef String, return Res; } + +bool Regex::isLiteralERE(StringRef Str) { + // Check for regex metacharacters. This list was derived from our regex + // implementation in regcomp.c and double checked against the POSIX extended + // regular expression specification. + return Str.find_first_of("()^$|*+?.[]\\{}") == StringRef::npos; +} -- cgit v1.2.3