From eaefd647ee060651e98f2758337500d13672d338 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 9 Jul 2018 17:38:38 +0200
Subject: Regenerate options parsing code

---
 build2/b-options.cxx |  3 +++
 build2/b-options.hxx |  7 ++++++-
 build2/b-options.ixx | 13 +++++++++++--
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/build2/b-options.cxx b/build2/b-options.cxx
index df39b2b..9b5e427 100644
--- a/build2/b-options.cxx
+++ b/build2/b-options.cxx
@@ -94,6 +94,9 @@ namespace build2
     {
       os << "invalid value '" << value ().c_str () << "' for option '"
          << option ().c_str () << "'";
+
+      if (!message ().empty ())
+        os << ": " << message ().c_str ();
     }
 
     const char* invalid_value::
diff --git a/build2/b-options.hxx b/build2/b-options.hxx
index c9eed77..f3ba750 100644
--- a/build2/b-options.hxx
+++ b/build2/b-options.hxx
@@ -155,7 +155,8 @@ namespace build2
       ~invalid_value () throw ();
 
       invalid_value (const std::string& option,
-                     const std::string& value);
+                     const std::string& value,
+                     const std::string& message = std::string ());
 
       const std::string&
       option () const;
@@ -163,6 +164,9 @@ namespace build2
       const std::string&
       value () const;
 
+      const std::string&
+      message () const;
+
       virtual void
       print (::std::ostream&) const;
 
@@ -172,6 +176,7 @@ namespace build2
       private:
       std::string option_;
       std::string value_;
+      std::string message_;
     };
 
     class eos_reached: public exception
diff --git a/build2/b-options.ixx b/build2/b-options.ixx
index 0691f12..0749e4d 100644
--- a/build2/b-options.ixx
+++ b/build2/b-options.ixx
@@ -86,8 +86,11 @@ namespace build2
     //
     inline invalid_value::
     invalid_value (const std::string& option,
-                   const std::string& value)
-    : option_ (option),  value_ (value)
+                   const std::string& value,
+                   const std::string& message)
+    : option_ (option),
+      value_ (value),
+      message_ (message)
     {
     }
 
@@ -103,6 +106,12 @@ namespace build2
       return value_;
     }
 
+    inline const std::string& invalid_value::
+    message () const
+    {
+      return message_;
+    }
+
     // file_io_failure
     //
     inline file_io_failure::
-- 
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