Add support for option merging (--generate-merge)

3 files changed, 85 insertions, 0 deletions

diff --git a/tests/merge/buildfile b/tests/merge/buildfile
new file mode 100644
index 0000000..c1ef0a1
--- /dev/null
+++ b/tests/merge/buildfile
@@ -0,0 +1,10 @@
+# file      : tests/merge/buildfile
+# copyright : Copyright (c) 2009-2019 Code Synthesis Tools CC
+# license   : MIT; see accompanying LICENSE file
+
+exe{driver}: {hxx cxx}{* -test} cli.cxx{test}
+
+cxx.poptions =+ "-I$out_base"
+
+cli.cxx{test}: cli{test}
+cli.options = --generate-merge
diff --git a/tests/merge/driver.cxx b/tests/merge/driver.cxx
new file mode 100644
index 0000000..a0791e6
--- /dev/null
+++ b/tests/merge/driver.cxx
@@ -0,0 +1,56 @@
+// file      : tests/merge/driver.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2019 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+// Test parsed options merging.
+//
+
+#include <string>
+#include <cassert>
+
+#include "test.hxx"
+
+using namespace std;
+
+template <typename T, int N1, int N2>
+static T
+merge (const char* (&av1)[N1], const char* (&av2)[N2])
+{
+  int ac1 (N1);
+  int ac2 (N2);
+  T o1 (ac1, const_cast<char**> (av1));
+  T o2 (ac2, const_cast<char**> (av2));
+  o1.merge (o2);
+  return o1;
+}
+
+int
+main ()
+{
+  // Basics.
+  //
+  {
+    const char* a1[] = {"",       "-i=123",           "-v=1", "-v=2"};
+    const char* a2[] = {"", "-b", "-i=456", "-s=xyz", "-v=3", "-v=4"};
+    derived r (merge<derived> (a1, a2));
+
+    assert (r.b ());
+    assert (r.i_specified () && r.i () == 456);
+    assert (r.s_specified () && r.s () == "xyz");
+    assert (r.v_specified () && r.v ().size () == 4 &&
+            r.v ()[0] == 1 &&
+            r.v ()[1] == 2 &&
+            r.v ()[2] == 3 &&
+            r.v ()[3] == 4);
+  }
+
+  // Default value does not override.
+  //
+  {
+    const char* a1[] = {"", "-i=456"};
+    const char* a2[] = {""          };
+    derived r (merge<derived> (a1, a2));
+    assert (r.i_specified () && r.i () == 456);
+  }
+}
diff --git a/tests/merge/test.cli b/tests/merge/test.cli
new file mode 100644
index 0000000..64da534
--- /dev/null
+++ b/tests/merge/test.cli
@@ -0,0 +1,19 @@
+// file      : tests/merge/test.cli
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2019 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+include <string>;
+include <vector>;
+
+class base
+{
+  bool -b;
+  int -i = -1;
+  std::string -s;
+};
+
+class derived: base
+{
+  std::vector<int> -v;
+};