1 files changed, 23 insertions, 3 deletions
diff --git a/libformat/libformat/format.cxx b/libformat/libformat/format.cxx
index 421f50d..53530a8 100644
--- a/libformat/libformat/format.cxx
+++ b/libformat/libformat/format.cxx
@@ -2,10 +2,30 @@
 
 #include <libformat/format.hxx>
 
+#include <cctype>     // to{upper,lower}()
+#include <algorithm>  // transform()
+
 using namespace std;
 
-string
-format (const string& g, const string& n)
+namespace format
 {
-  return g + ", " + n + '!';
+  string
+  message (const string& g, const string& n, volume v)
+  {
+    string r (g);
+
+    auto tr = [&r] (char (*t) (char))
+    {
+      transform (r.begin (), r.end (), r.begin (), t);
+    };
+
+    switch (v)
+    {
+    case volume::quiet:  tr ([](char c) -> char {return tolower (c);}); break;
+    case volume::normal:                                                break;
+    case volume::loud:   tr ([](char c) -> char {return toupper (c);}); break;
+    }
+
+    return r += ", " + n + '!';
+  }
 }