Method compilePOSIX

java/com/google/re2j/RE2.java:179–181

compilePOSIX is like #compile but restricts the regular expression to POSIX ERE (egrep) syntax and changes the match semantics to leftmost-longest. That is, when matching against text, the regexp returns a match that begins as early as possible in the input (leftmost), and among

(String expr)

   * even well-defined. See http://swtch.com/~rsc/regexp/regexp2.html#posix
   */
  static RE2 compilePOSIX(String expr) throws PatternSyntaxException {
    return compileImpl(expr, POSIX, /*longest=*/ true);
  }

  // Exposed to ExecTests.
  static RE2 compileImpl(String expr, int mode, boolean longest) throws PatternSyntaxException {