1 files changed, 25 insertions, 0 deletions
diff --git a/libbuild2/config/types.hxx b/libbuild2/config/types.hxx
new file mode 100644
index 0000000..3cdc5e3
--- /dev/null
+++ b/libbuild2/config/types.hxx
@@ -0,0 +1,25 @@
+// file      : libbuild2/config/types.hxx -*- C++ -*-
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_CONFIG_TYPES_HXX
+#define LIBBUILD2_CONFIG_TYPES_HXX
+
+#include <libbuild2/types.hxx>
+
+namespace build2
+{
+  namespace config
+  {
+    // The origin of the value of a configuration variable.
+    //
+    enum class variable_origin
+    {
+      undefined,  // Undefined.
+      default_,   // Default value from the config directive.
+      buildfile,  // Value from a buildfile, normally config.build.
+      override_   // Value from a command line override.
+    };
+  }
+}
+
+#endif // LIBBUILD2_CONFIG_TYPES_HXX