Add to_string(process_exit) in addition to operator<<(ostream,process_exit)

2 files changed, 22 insertions, 10 deletions

diff --git a/libbutl/process.cxx b/libbutl/process.cxx
index f6c498e..5505fde 100644
--- a/libbutl/process.cxx
+++ b/libbutl/process.cxx
@@ -106,19 +106,25 @@ namespace butl
 {
   // process_exit
   //
-  ostream&
-  operator<< (ostream& os, process_exit pe)
+  LIBBUTL_SYMEXPORT string
+  to_string (process_exit pe)
   {
+    string r;
+
     if (pe.normal ())
-      os << "exited with code " << static_cast<uint16_t> (pe.code ());
+    {
+      r  = "exited with code ";
+      r += std::to_string (pe.code ());
+    }
     else
     {
-      os << "terminated abnormally: " << pe.description ();
+      r  = "terminated abnormally: ";
+      r += pe.description ();
       if (pe.core ())
-        os << " (core dumped)";
+        r += " (core dumped)";
     }
 
-    return os;
+    return r;
   }
 
   // process
diff --git a/libbutl/process.mxx b/libbutl/process.mxx
index 27c13fa..199273b 100644
--- a/libbutl/process.mxx
+++ b/libbutl/process.mxx
@@ -15,7 +15,7 @@
 #ifndef __cpp_lib_modules
 #include <string>
 #include <vector>
-#include <iosfwd>
+#include <ostream>
 #include <cstddef>      // size_t
 #include <cstdint>      // uint32_t
 #include <system_error>
@@ -200,7 +200,7 @@ LIBBUTL_MODEXPORT namespace butl
     description () const;
   };
 
-  // Print canonical exit status diagnostics:
+  // Canonical exit status description:
   //
   // "terminated abnormally: <...> (core dumped)"
   // "exited with code <...>"
@@ -209,8 +209,14 @@ LIBBUTL_MODEXPORT namespace butl
   //
   // cerr << "process " << args[0] << " " << *pr.exit << endl;
   //
-  LIBBUTL_SYMEXPORT std::ostream&
-  operator<< (std::ostream&, process_exit);
+  LIBBUTL_SYMEXPORT std::string
+  to_string (process_exit);
+
+  inline std::ostream&
+  operator<< (std::ostream& os, process_exit pe)
+  {
+    return os << to_string (pe);
+  }
 
   class LIBBUTL_SYMEXPORT process
   {