1) Disabled recursive implementation for VC8: stack overflows can't be reliably detected unless the whole program is compiled with asynchronous exceptions.

2) Changed std::copy calls on VC8 to avoid "dangerous code" warnings.
3) Moved backreference and octal escape code into line with POSIX-extended requirements.
4) Changed match_results leftmost-longest rules to stop unnecessary std::distance computations (an optimisation for non-random access iterators).
5) Changed C lib calls to use "safe" versions of string API's where available.
6) Added many new POSIX-extended leftmost-longest tests, to verify the above.


[SVN r27880]

test/regress/main.cpp

@@ -35,7 +35,6 @@ int cpp_main(int /*argc*/, char * /*argv*/[])
    test_character_escapes();
    test_assertion_escapes();
    test_tricky_cases();
-   test_tricky_cases2();
    test_grep();
    test_replace();
    test_non_greedy_repeats();