tnovits-d2d / luapp

Lua API wrapper for C++11

Lua API++ library

Lua API++ library is a C++ wrapper for Lua API. The goal of this library is to let you operate Lua using simple expressive syntax.

##Current status Lua 5.3 support is added.

##Most noticeable features provided by the library:

• automatic stack management;
• natural expressions (indexing, calls, arithmetics, concatenation);
• full support of multi-value returns;
• userdata support;
• easy table creation and handling;
• automatic wrapping of functions;
• support for Lua 5.1 (compatible with LuaJIT), 5.2 and 5.3.

##Information The library comes fully documented. Dive head-in with motivational example, get acquainted with basic concepts or see what's new in the changelog.

##Most noticeable unsupported features:

• debug;
• coroutines;
• string buffers.

The library requires C++11 compatible compiler. It is distributed under terms of MIT license.

luapp's Issues

Mess in header dependency

Mess in header dependency drives crazy the Clang code model in QT Creator.

Insufficient Context::push overload

compiling testContextFutil.cpp
/usr/bin/g++ -m64 -g -O0 -Wall -Wextra -pipe -fvisibility=default -fPIC -Ilua-api-pp -Ilua-api-pp/luapp -Ilua-api-pp/test -c lua-api-pp/test/testContextAccessors.cpp -o lua-api-pp/.bld/luapp-Native-Debug/qtc_Native_13ebe065-debug/luapp-test.qtc-Native-13ebe065.f9266a53/.obj/a94a8fe5ccb19ba6/testContextAccessors.cpp.o -std=c++1y
In file included from lua-api-pp/luapp/lua.hpp:93:0,
                 from lua-api-pp/test/fixtures.h:4,
                 from lua-api-pp/test/testContextAccessors.cpp:3:
lua-api-pp/luapp/lua_impl.hxx: In instantiation of ‘void lua::_::lazyImmediateValue< <template-parameter-1-1> >::push(lua::Context&) [with ValueType = long unsigned int]’:
lua-api-pp/luapp/lua_lazy.hxx:442:5:   required from ‘void lua::_::Lazy<Policy>::push() [with Policy = lua::_::lazyImmediateValue<long unsigned int>]’
lua-api-pp/luapp/lua_impl.hxx:898:5:   required from ‘static void lua::_::lazyConcatSelector::pushOnly(lua::Context&, lua::_::Lazy<lua::_::lazyImmediateValue<lua::_::Lazy<lua::_::lazyConcat<VT11, VT12> > > >&, lua::_::Lazy<lua::_::lazyImmediateValue<VT2> >&) [with VT11 = lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >; VT12 = const char*; VT2 = long unsigned int]’
lua-api-pp/luapp/lua_operations.hxx:162:33:   required from ‘void lua::_::lazyConcat< <template-parameter-1-1>, <template-parameter-1-2> >::pushOnly(lua::Context&) [with VT1 = lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >; VT2 = long unsigned int]’
lua-api-pp/luapp/lua_lazy.hxx:454:5:   required from ‘void lua::_::Lazy<Policy>::pushOnly() [with Policy = lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int>]’
lua-api-pp/luapp/lua_lazy.hxx:728:5:   required from ‘void lua::_::lazyImmediateValue<lua::_::Lazy<Policy> >::pushOnly(lua::Context&) [with Policy = lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int>]’
lua-api-pp/luapp/lua_lazy.hxx:454:5:   [ skipping 4 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
lua-api-pp/luapp/lua_lazy.hxx:442:5:   required from ‘void lua::_::Lazy<Policy>::push() [with Policy = lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int> >, const char*>]’
lua-api-pp/luapp/lua_context.hxx:757:4:   required from ‘void lua::Context::push(lua::_::Lazy<Policy>&&) [with Policy = lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int> >, const char*>]’
lua-api-pp/luapp/lua_context.hxx:684:4:   required from ‘void lua::Context::ipush(T&&) [with T = lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int> >, const char*> >]’
lua-api-pp/luapp/lua_context.hxx:294:4:   required from ‘lua::Retval lua::Context::error(MsgType&&) [with MsgType = lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyConcat<lua::_::Lazy<lua::_::lazyWhere>, const char*> >, long unsigned int> >, const char*> >, long unsigned int> >, const char*> >]’
lua-api-pp/luapp/lua_impl.hxx:1487:9:   required from ‘void lua::Context::requireArgs(size_t) [with ArgTypes = {double, void, const char*, lua::Retval (*)(lua::Context&)}; size_t = long unsigned int]’
lua-api-pp/test/testContextAccessors.cpp:85:60:   required from here
lua-api-pp/luapp/lua_impl.hxx:405:4: error: call of overloaded ‘push(long unsigned int&)’ is ambiguous
    S.push(V);
    ^
In file included from lua-api-pp/luapp/lua.hpp:91:0,
                 from lua-api-pp/test/fixtures.h:4,
                 from lua-api-pp/test/testContextAccessors.cpp:3:
lua-api-pp/luapp/lua_context.hxx:697:8: note: candidate: void lua::Context::push(bool)
   void push(bool) noexcept;
        ^
lua-api-pp/luapp/lua_context.hxx:721:8: note: candidate: void lua::Context::push(int)
   void push(int val) noexcept
        ^
lua-api-pp/luapp/lua_context.hxx:726:8: note: candidate: void lua::Context::push(unsigned int)
   void push(unsigned int val) noexcept
        ^
lua-api-pp/luapp/lua_context.hxx:731:8: note: candidate: void lua::Context::push(long long int)
   void push(long long val) noexcept;
        ^
lua-api-pp/luapp/lua_context.hxx:732:8: note: candidate: void lua::Context::push(long long unsigned int)
   void push(unsigned long long val) noexcept;
        ^
lua-api-pp/luapp/lua_context.hxx:734:8: note: candidate: void lua::Context::push(float)
   void push(float val) noexcept
        ^
lua-api-pp/luapp/lua_context.hxx:739:8: note: candidate: void lua::Context::push(double)
   void push(double) noexcept;
        ^

Filenames prefix

It makes sense for 'source-based' "c++" library to use prefix in its file names.

VS-specific keyword __cdecl

compiling impl.cpp
/usr/bin/g++ -m64 -g -O0 -Wall -Wextra -pipe -fvisibility=default -fPIC -Ilua-api-pp -Ilua-api-pp/luapp -Ilua-api-pp/test -c lua-api-pp/luapp/impl.cpp -o lua-api-pp/.bld/luapp-Native-Debug/qtc_Native_13ebe065-debug/luapp-test.qtc-Native-13ebe065.f9266a53/.obj/373461db414d3309/impl.cpp.o -std=c++1y
In file included from lua-api-pp/luapp/lua.hpp:94:0,
                 from lua-api-pp/luapp/impl.cpp:17:
lua-api-pp/luapp/lua_state.hxx:30:24: error: expected ‘,’ or ‘...’ before ‘(’ token
   explicit State(void* (__cdecl customAllocatorFunction) (void* ud, void* ptr, size_t oldSize, size_t newSize), void* ud = nullptr);
                        ^

Ambiguous header name lua.hpp

Header lua.hpp is in distribution since Lua 5.2.
So "luapp/lua.hpp" is conflicting with the system-wide header "/usr/include/lua.hpp".

Error in testWrappers.cpp TC:ReturningReferences

Variables crvN are checked instead of rvN.

Using of std::ptrdiff_t without the namespace

/usr/bin/g++ -m64 -g -O0 -Wall -Wextra -pipe -fvisibility=default -fPIC -Ilua-api-pp -Ilua-api-pp/luapp -Ilua-api-pp/test -c lua-api-pp/test/fixtures.cpp -o lua-api-pp/.bld/luapp-Native-Debug/qtc_Native_13ebe065-debug/luapp-test.qtc-Native-13ebe065.f9266a53/.obj/a94a8fe5ccb19ba6/fixtures.cpp.o -std=c++1y
In file included from lua-api-pp/luapp/lua.hpp:55:0,
                 from lua-api-pp/test/fixtures.cpp:1:
lua-api-pp/luapp/lua_valueset.hxx:110:4: error: ‘ptrdiff_t’ does not name a type
    ptrdiff_t operator - (const vsCIterator& rhs) const noexcept
    ^
lua-api-pp/luapp/lua_valueset.hxx:237:4: error: ‘ptrdiff_t’ does not name a type
    ptrdiff_t operator - (const vsIterator& rhs) const noexcept
    ^
In file included from lua-api-pp/luapp/lua.hpp:55:0,
                 from lua-api-pp/test/fixtures.cpp:1:
lua-api-pp/luapp/lua_valueset.hxx:333:11: error: ‘ptrdiff_t’ does not name a type
   typedef ptrdiff_t difference_type; //!< @brief Index difference.
           ^