From 87d2f57e85e47e947b1918ed9395c7115c523fe6 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 24 Nov 2014 15:08:39 +0200
Subject: Add compiler error comments

---
 odb/database.txx | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/odb/database.txx b/odb/database.txx
index 4329754..a46b8b0 100644
--- a/odb/database.txx
+++ b/odb/database.txx
@@ -94,10 +94,17 @@ namespace odb
 
         for (; b != e && n < object_traits::batch; ++n)
         {
+          // Compiler error pointing here? Perhaps the passed range is
+          // of const objects?
+          //
           typename persist_type<object_type>::type* p (&(*b++));
+
           a[n] = const_cast<T*> (p);
         }
 
+        // Compiler error pointing here? Perhaps the object or the
+        // database does not support bulk operations?
+        //
         object_traits::persist (
           *this,
           const_cast<typename persist_type<object_type>::type**> (a),
@@ -182,6 +189,9 @@ namespace odb
           a[n] = &pointer_traits<pointer_type>::get_ref (*p[n].ref);
         }
 
+        // Compiler error pointing here? Perhaps the object or the
+        // database does not support bulk operations?
+        //
         object_traits::persist (*this, a, n, mex);
 
         if (mex.fatal ())
@@ -302,6 +312,9 @@ namespace odb
         for (; b != e && n < object_traits::batch; ++n)
           a[n] = &opt::get_ref (*b++);
 
+        // Compiler error pointing here? Perhaps the object or the
+        // database does not support bulk operations?
+        //
         object_traits::update (*this, a, n, mex);
 
         if (mex.fatal ())
@@ -362,10 +375,13 @@ namespace odb
 
         for (; b != e && n < object_traits::batch; ++n)
           // Compiler error pointing here? Perhaps the object id type
-          // and the sequence element type don't match?
+          // and the range element type don't match?
           //
           a[n] = &(*b++);
 
+        // Compiler error pointing here? Perhaps the object or the
+        // database does not support bulk operations?
+        //
         object_traits::erase (*this, a, n, mex);
 
         if (mex.fatal ())
@@ -421,6 +437,9 @@ namespace odb
         for (; b != e && n < object_traits::batch; ++n)
           a[n] = &opt::get_ref (*b++);
 
+        // Compiler error pointing here? Perhaps the object or the
+        // database does not support bulk operations?
+        //
         object_traits::erase (*this, a, n, mex);
 
         if (mex.fatal ())
-- 
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