QRegExp parsing matched quoted strings

[mattc]

The following pattern works for me with the input you provide and a few more I tested:

test(
  "test \"a string\" \"string \\\" escaped\" 1 2",
  "((?:[^\\s\"]+)|(?:\"(?:\\\\\"|[^\"])*\"))");

test(
  "test \"a string\" \"string \\\" escaped\" 1 2",
  "((?:[^\\s\"]+)|(?:\"(?:\\\\\"|[^\"])*\"))");

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Output of qDebug() << rx.cap(1):

testing "test "a string" "string \" escaped" 1 2" against "((?:[^\s"]+)|(?:"(?:\\"|[^"])*"))"
"test"
""a string""
""string \" escaped""
"1"
"2"