Generalize regex_replace_ex() function

1 files changed, 66 insertions, 0 deletions

diff --git a/tests/regex/driver.cxx b/tests/regex/driver.cxx
new file mode 100644
index 0000000..054eb31
--- /dev/null
+++ b/tests/regex/driver.cxx
@@ -0,0 +1,66 @@
+// file      : tests/regex/driver.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <string>
+#include <cassert>
+#include <iostream>
+#include <exception>
+
+#include <libbutl/regex.hxx>
+#include <libbutl/utility.hxx> // operator<<(ostream, exception)
+
+using namespace std;
+using namespace butl;
+
+// Usage: argv[0] [-ffo] [-fnc] <string> <regex> <format>
+//
+// Perform substitution of matched substrings with formatted replacement
+// strings using regex_replace_ex() function. If the string matches the regex
+// then print the replacement to STDOUT and exit with zero code. Exit with
+// code one if it doesn't match, and with code two on failure (print error
+// description to STDERR).
+//
+// -ffo
+//    Use format_first_only replacement flag.
+//
+// -fnc
+//    Use format_no_copy replacement flag.
+//
+int
+main (int argc, const char* argv[])
+try
+{
+  regex_constants::match_flag_type fl (regex_constants::match_default);
+
+  int i (1);
+  for (; i != argc; ++i)
+  {
+    string op (argv[i]);
+
+    if (op == "-ffo")
+      fl |= regex_constants::format_first_only;
+    else if (op == "-fnc")
+      fl |= regex_constants::format_no_copy;
+    else
+      break;
+  }
+
+  assert (i + 3 == argc);
+
+  string s   (argv[i++]);
+  regex  re  (argv[i++]);
+  string fmt (argv[i]);
+
+  auto r (regex_replace_ex (s, re, fmt, fl));
+
+  if (r.second)
+    cout << r.first << endl;
+
+  return r.second ? 0 : 1;
+}
+catch (const exception& e)
+{
+  cerr << e << endl;
+  return 2;
+}