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[Lua] pairs and ipairs for ObjectList (resolves #6732)

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This commit is contained in:
Petr Mikheev 2022-05-06 23:11:47 +02:00
parent a9767f1ffc
commit 70c7f1880d
2 changed files with 11 additions and 24 deletions
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26
apps/openmw/mwlua/objectbindings.cpp
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@ -131,30 +131,8 @@ namespace MWLua
else
throw std::runtime_error("Index out of range");
};
if constexpr (std::is_same_v<ObjectT, GObject>)
{
// GObject and LObject iterators are in separate branches because if they share source code
// there is a collision in sol and only one iterator can be mapped to Lua.
auto iter = sol::make_object(lua, [registry](const GObjectList& l, int64_t i) -> sol::optional<std::tuple<int64_t, GObject>>
{
if (i >= 0 && i < static_cast<int64_t>(l.mIds->size()))
return std::make_tuple(i + 1, GObject((*l.mIds)[i], registry));
else
return sol::nullopt;
});
listT[sol::meta_function::ipairs] = [iter](const GObjectList& list) { return std::make_tuple(iter, list, 0); };
}
else
{
auto iter = sol::make_object(lua, [registry](const LObjectList& l, int64_t i) -> sol::optional<std::tuple<int64_t, LObject>>
{
if (i >= 0 && i < static_cast<int64_t>(l.mIds->size()))
return std::make_tuple(i + 1, LObject((*l.mIds)[i], registry));
else
return sol::nullopt;
});
listT[sol::meta_function::ipairs] = [iter](const LObjectList& list) { return std::make_tuple(iter, list, 0); };
}
listT[sol::meta_function::pairs] = lua["ipairsForArray"].template get<sol::function>();
listT[sol::meta_function::ipairs] = lua["ipairsForArray"].template get<sol::function>();
}
template <class ObjectT>

9
components/lua/luastate.cpp
View File

@ -92,6 +92,15 @@ namespace LuaUtil
local nextFn, t, firstKey = ipairs(getmetatable(v).__index)
return function(_, k) return nextFn(t, k) end, v, firstKey
end
local function nextForArray(array, index)
index = (index or 0) + 1
if index < #array then
return index, array[index]
end
end
function ipairsForArray(array)
return nextForArray, array, 0
end
getmetatable('').__metatable = false
getSafeMetatable = function(v)