Problem with core::map

[vincent-v]

Hi everyone,

I declared a

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core::map<core::stringw, core::map<core::stringw, core::stringw> > m_data;

and then I try to retrieve a value in the second map

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const core::map<core::stringw, core::stringw>& set = m_data[group];
core::stringw retValue = set[key];

But it doesn't work...

INIFile.hpp:86: error: passing `const irr::core::map<irr::core::stringw, irr::core::stringw>' as `this' argument of `irr::core::map<KeyType, ValueType>::AccessClass irr::core::map<KeyType, ValueType>::operator[](const KeyType&) [with KeyType = irr::core::stringw, ValueType = irr::core::stringw]' discards qualifiers

I guess this happens because of the const qualifier but the reference needs to be const qualified.

Any help is welcome

[EDIT]

I found a workaround using a pointer

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core::map<core::stringw, core::map<core::stringw, core::stringw>* > m_data;

But I'm still wondering if there is a way to solve my problem without pointers usage.