add colours e.g. fmt::colour(fmt::red)

format.cc

@@ -423,6 +423,9 @@ void fmt::BasicFormatter<Char>::DoFormat() {
   next_arg_index_ = 0;
   const Char *s = start;
   BasicWriter<Char> &writer = *writer_;
+
+  //  fmt::colour(fmt::Red);
+
   while (*s) {
     Char c = *s++;
     if (c != '{' && c != '}') continue;
@@ -727,3 +730,11 @@ template void fmt::BasicFormatter<wchar_t>::CheckSign(
     const wchar_t *&s, const Arg &arg);
 
 template void fmt::BasicFormatter<wchar_t>::DoFormat();
+
+
+
+
+ void fmt::colour(Colours col)
+{
+  printf("\033[0;%dm",col);
+}

format.h

@@ -910,6 +910,14 @@ void FormatCustomArg(
   the output is sent to a :cpp:class:`fmt::Writer` object.
   \endrst
  */
+
+
+enum Colours{black=30,red,green,yellow,blue,Magenta,cyan,white};
+
+ void colour(Colours);
+
+
+
 template <typename Char>
 class BasicFormatter {
  private:
@@ -1359,8 +1367,12 @@ class Write {
 inline Formatter<Write> Print(StringRef format) {
   Formatter<Write> f(format);
   return f;
-}
-}
+
+
+  
+
+}//end namespace internal (?)
+}//end namespace format (?)
 
 #ifdef FMT_GCC_DIAGNOSTIC
 # pragma GCC diagnostic pop