Fix braces around sub-selects used as tables

include/sqlpp11/select_pseudo_table.h

@@ -55,7 +55,10 @@ namespace sqlpp
   struct select_pseudo_table_t
       : public table_t<select_pseudo_table_t<Select, NamedExpr...>, select_column_spec_t<Select, NamedExpr>...>
   {
-    using _traits = make_traits<no_value_t, tag::is_table, tag::is_pseudo_table>;
+    using _traits = make_traits<no_value_t,
+                                tag::is_table,
+                                tag::is_pseudo_table,
+                                tag_if<tag::requires_braces, requires_braces_t<Select>::value>>;
     using _nodes = detail::type_vector<>;
 
     select_pseudo_table_t(Select select) : _select(select)

include/sqlpp11/table_alias.h

@@ -27,12 +27,12 @@
 #ifndef SQLPP_TABLE_ALIAS_H
 #define SQLPP_TABLE_ALIAS_H
 
-#include <sqlpp11/column_fwd.h>
-#include <sqlpp11/interpret.h>
-#include <sqlpp11/type_traits.h>
-#include <sqlpp11/join.h>
 #include <sqlpp11/alias.h>
+#include <sqlpp11/column_fwd.h>
 #include <sqlpp11/detail/type_set.h>
+#include <sqlpp11/interpret.h>
+#include <sqlpp11/join.h>
+#include <sqlpp11/type_traits.h>
 
 namespace sqlpp
 {
@@ -107,10 +107,10 @@ namespace sqlpp
 
     static Context& _(const T& t, Context& context)
     {
-      if (requires_braces_t<T>::value)
+      if (requires_braces_t<Table>::value)
         context << "(";
       serialize(t._table, context);
-      if (requires_braces_t<T>::value)
+      if (requires_braces_t<Table>::value)
         context << ")";
       context << " AS " << name_of<T>::char_ptr();
       return context;

test_serializer/CMakeLists.txt

@@ -28,6 +28,7 @@ set(test_serializer_names
   In
   Insert
   Where
+	TableAlias
   )
 
 create_test_sourcelist(test_serializer_sources test_serializer_main.cpp ${test_serializer_names})

test_serializer/TableAlias.cpp

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2016-2016, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Sample.h"
+#include "compare.h"
+#include <sqlpp11/sqlpp11.h>
+
+#include <iostream>
+
+int TableAlias(int, char* [])
+{
+  const auto foo = test::TabFoo{};
+  const auto bar = test::TabBar{};
+
+  // Individual values
+  compare(__LINE__, foo.as(bar), "tab_foo AS tab_bar");
+  compare(__LINE__, select(foo.omega).from(foo).unconditionally().as(bar),
+          "(SELECT tab_foo.omega FROM tab_foo) AS tab_bar");
+
+  return 0;
+}