From 28b92b59909030424420fefbca5a3f5df22337b5 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 20 Jul 2017 08:51:52 +0200
Subject: Make slightly more interesting

---
 libformat/libformat/buildfile  |  2 +-
 libformat/libformat/format.cxx | 26 +++++++++++++++++++++++---
 libformat/libformat/format.hxx |  9 +++++++--
 3 files changed, 31 insertions(+), 6 deletions(-)

(limited to 'libformat/libformat')

diff --git a/libformat/libformat/buildfile b/libformat/libformat/buildfile
index 4f6f156..55c918a 100644
--- a/libformat/libformat/buildfile
+++ b/libformat/libformat/buildfile
@@ -18,4 +18,4 @@ libs{format}: cxx.export.poptions += -DLIBFORMAT_SHARED
 
 # Install into the libformat/ subdirectory of, say, /usr/include/.
 #
-install.include = $install.include/libformat/
+install.include = $install.include/$project/
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 + '!';
+  }
 }
diff --git a/libformat/libformat/format.hxx b/libformat/libformat/format.hxx
index 9c813ac..c711c16 100644
--- a/libformat/libformat/format.hxx
+++ b/libformat/libformat/format.hxx
@@ -6,5 +6,10 @@
 
 #include <libformat/export.hxx>
 
-LIBFORMAT_EXPORT std::string
-format (const std::string& greeting, const std::string& name);
+namespace format
+{
+  enum class volume {quiet, normal, loud};
+
+  LIBFORMAT_EXPORT std::string
+  message (const std::string& greeting, const std::string& name, volume);
+}
-- 
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