1 files changed, 26 insertions, 0 deletions
diff --git a/libbrep/common.cxx b/libbrep/common.cxx
index 2e9ff34..8964e0a 100644
--- a/libbrep/common.cxx
+++ b/libbrep/common.cxx
@@ -6,4 +6,30 @@
 namespace brep
 {
   const version wildcard_version (0, "0", nullopt, nullopt, 0);
+
+  // unbuildable_reason
+  //
+  string
+  to_string (unbuildable_reason r)
+  {
+    switch (r)
+    {
+    case unbuildable_reason::stub:        return "stub";
+    case unbuildable_reason::test:        return "test";
+    case unbuildable_reason::external:    return "external";
+    case unbuildable_reason::unbuildable: return "unbuildable";
+    }
+
+    return string (); // Should never reach.
+  }
+
+  unbuildable_reason
+  to_unbuildable_reason (const string& r)
+  {
+         if (r == "stub")        return unbuildable_reason::stub;
+    else if (r == "test")        return unbuildable_reason::test;
+    else if (r == "external")    return unbuildable_reason::external;
+    else if (r == "unbuildable") return unbuildable_reason::unbuildable;
+    else throw invalid_argument ("invalid unbuildable reason '" + r + "'");
+  }
 }