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 +++++++--
 libformat/tests/test/driver.cxx |  5 ++++-
 libformat/tests/test/test.out   |  2 ++
 5 files changed, 37 insertions(+), 7 deletions(-)

(limited to '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);
+}
diff --git a/libformat/tests/test/driver.cxx b/libformat/tests/test/driver.cxx
index fb2939d..1cf2959 100644
--- a/libformat/tests/test/driver.cxx
+++ b/libformat/tests/test/driver.cxx
@@ -8,6 +8,9 @@ int
 main ()
 {
   using namespace std;
+  using namespace format;
 
-  cout << format ("Hello", "World") << endl;
+  cout << message ("Hello", "World", volume::quiet) << endl;
+  cout << message ("Hello", "World", volume::normal) << endl;
+  cout << message ("Hello", "World", volume::loud) << endl;
 }
diff --git a/libformat/tests/test/test.out b/libformat/tests/test/test.out
index 8ab686e..7ce133b 100644
--- a/libformat/tests/test/test.out
+++ b/libformat/tests/test/test.out
@@ -1 +1,3 @@
+hello, World!
 Hello, World!
+HELLO, World!
-- 
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