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From "Justin Ross (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PROTON-1840) [cpp] Nested complex types fail compilation with "incomplete type" error
Date Wed, 02 May 2018 22:13:00 GMT

     [ https://issues.apache.org/jira/browse/PROTON-1840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Justin Ross updated PROTON-1840:
--------------------------------
    Summary: [cpp] Nested complex types fail compilation with "incomplete type" error  (was:
[C++ binding] Nested complex types fail compilation with "incomplete type" error)

> [cpp] Nested complex types fail compilation with "incomplete type" error
> ------------------------------------------------------------------------
>
>                 Key: PROTON-1840
>                 URL: https://issues.apache.org/jira/browse/PROTON-1840
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: cpp-binding
>            Reporter: Kim van der Riet
>            Assignee: Alan Conway
>            Priority: Major
>
> When using nested complex types (for example, a list of maps or an array of lists), the
compiler fails to compile. For example, the following code snippet (saved as {{ctt.cpp}}):
> {noformat}
> #include <map>
> #include <vector>
> #include <proton/types.hpp>
> int main(int, char**) {
>     std::map<proton::value, proton::value> m1 = {{uint8_t(0), "zero"}, {uint8_t(1),
"one"}};
>     std::map<proton::value, proton::value> m2 = {{true, "true"}, {false, "false"}};
>     std::vector<std::map<proton::value, proton::value> > am = {m1, m2};
>     proton::value pv = am;
> }{noformat}
> fails compilation with the following error:
> {noformat}
> In file included from install/include/proton/types.hpp:47:0,
> from ctt.cpp:3:
> install/include/proton/./codec/vector.hpp: In instantiation of ‘proton::codec::encoder&
proton::codec::operator<<(proton::codec::encoder&, const std::vector<_Tp, _Alloc>&)
[with T = std::map<proton::value, proton::value>; A = std::allocator<std::map<proton::value,
proton::value> >]’:
> install/include/proton/./value.hpp:84:11: required from ‘typename proton::value::assignable<T,
proton::value&>::type proton::value::operator=(const T&) [with T = std::vector<std::map<proton::value,
proton::value> >; typename proton::value::assignable<T, proton::value&>::type
= proton::value&]’
> install/include/proton/./value.hpp:79:85: required from ‘proton::value::value(const
T&, typename proton::value::assignable<T>::type*) [with T = std::vector<std::map<proton::value,
proton::value> >; typename proton::value::assignable<T>::type = void]’
> ctt.cpp:9:24: required from here
> install/include/proton/./codec/vector.hpp:39:31: error: incomplete type ‘proton::internal::type_id_of<std::map<proton::value,
proton::value> >’ used in nested name specifier
>     return e << encoder::array(x, internal::type_id_of<T>::value);
>                 ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> {noformat}
>  



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