1 files changed, 31 insertions, 0 deletions
diff --git a/libmformat/libmformat/format.cxx b/libmformat/libmformat/format.cxx
new file mode 100644
index 0000000..fe6ad15
--- /dev/null
+++ b/libmformat/libmformat/format.cxx
@@ -0,0 +1,31 @@
+// file: libmformat/format.cxx -*- C++ -*-
+
+module format;
+
+import std.core; // transform()
+import std.io;   // to{upper,lower}()
+
+using namespace std;
+
+namespace format
+{
+  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 + '!';
+  }
+}