Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>If it needs to work in vs2010, then your best bet is <a href="http://www.boost.org/libs/preprocessor" rel="nofollow">Boost.Preprocessor</a>. It is not as robust as variadic templates in that it has a maximum recursion depth of 3 and a maximum iteration count of 256, but it works in every compiler with or without C++11 support. It isn't completely clear what you are trying to do with those examples, but if you are just trying to decorate functions, I use the following (utilizes C++11 for perfect forwarding with Boost.Preprocessor instead of variadic templates):</p> <pre><code>#define FORWARD(z, n, data) \ ::std::forward&lt;BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 0, data), n)&gt; \ (BOOST_PP_CAT(BOST_PP_TUPLE_ELEM(2, 1, data), n)) \ /**/ //------------------------------------------------------------------------ // template&lt;class R, class... A&gt; // ::std::function&lt;R(A...)&gt; decorate(::std::function&lt;R(A...)&gt; const&amp; func) // { // return [func](A&amp;&amp;... a) -&gt; R // { // /* DECORATOR STUFF */ // return func(::std::forward&lt;A&gt;(a)...); // }; // } //------------------------------------------------------------------------ #define MACRO(z, n, _) \ template&lt;class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, class A)&gt; \ ::std::function&lt;R(BOOST_PP_ENUM_PARAMS_Z(z, n, a)&gt; \ decorate(::std::function&lt;R(BOOST_PP_ENUM_PARAMS_Z(z, n, A))&gt; const&amp; func) \ { \ return [func](BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, A, &amp;&amp;a)) -&gt; R \ { \ /* DECORATOR STUFF */ \ return func(BOOST_PP_ENUM_ ## z(n, FORWARD, (A, a))); \ }; \ } \ /**/ BOOST_PP_REPEAT(10, MACRO, ~) #undef MACRO #undef FORWARD </code></pre> <p>If you are just trying to bind up function arguments, then <a href="http://en.cppreference.com/w/cpp/utility/functional/bind" rel="nofollow">std::bind</a> is what you are looking for. Note that you can do any of this with just <a href="http://en.wikipedia.org/wiki/Anonymous_function#C.2B.2B" rel="nofollow">lambdas</a>, but the decorator functions can be used to decorate multiple functions (where as lambdas are of course one offs) and bind can be a little more concise for binding arguments (however, the lambda equivalent is sometimes more readable).</p>
    singulars
    1. This table or related slice is empty.
    1. POReducing boilerplate when decorating methods
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDRayX
    1. USDRayX
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload