ENH: Added operator!= for stl string and char* when the system does not provide one.

1 files changed, 19 insertions, 0 deletions

diff --git a/Source/kwsys/kwsys_stl_string.hxx.in b/Source/kwsys/kwsys_stl_string.hxx.in
index 7d45649..2061c18 100644
--- a/Source/kwsys/kwsys_stl_string.hxx.in
+++ b/Source/kwsys/kwsys_stl_string.hxx.in
@@ -90,3 +90,22 @@ operator<<(@KWSYS_NAMESPACE@_ios::ostream& os,
   return os << s.c_str();
 }
 #endif
+
+// Provide the operator!= for the stl string and char* if it is not
+// provided by the system or another copy of kwsys.  Allow user code
+// to block this definition by defining the macro
+// @KWSYS_NAMESPACE@_STL_STRING_NO_NEQ_CHAR
+// to avoid conflicts with other libraries.
+#if !@KWSYS_NAMESPACE@_STL_STRING_HAVE_NEQ_CHAR && \
+    !defined(@KWSYS_NAMESPACE@_STL_STRING_NO_NEQ_CHAR) && \
+    !defined(KWSYS_STL_STRING_NEQ_CHAR_DEFINED)
+# define KWSYS_STL_STRING_NEQ_CHAR_DEFINED
+inline bool operator!=(@KWSYS_NAMESPACE@_stl::string const& s, const char* c)
+{
+  return !(s == c);
+}
+inline bool operator!=(const char* c, @KWSYS_NAMESPACE@_stl::string const& s)
+{
+  return !(s == c);
+}
+#endif