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greeniekin

Custom text handling for SFML String

3 posts in this topic

I have been using sfml libraries and it's string class.

I really want to keep using the sfml string class though it will not work with the angelscript std string addon.

Even though if the string class is given a stdString in c++ it will convert it.

I have tried modifying the angelscript std string add on for sfml string(with some changes to sfml string)

Like the following error

error: invalid static_cast from type '<unresolved overloaded function type>' to type 'bool (*)(const sf::String&, const sf::String&)'|
for the following
r = engine->RegisterObjectMethod("string", "bool opEquals(const string &in) const", asFUNCTIONPR(operator ==, (const sf::String &, const sf::String &), bool), asCALL_CDECL_OBJFIRST); assert( r >= 0 );

I know I can not expect you to write it or fix mine so I just have a few questions

I have not really read anything about alternative to the std string addon anywhere. I was wondering if there might be some other examples I can look at.

Also internally sfml String uses a std::basic_string<Uint32> to store the string. the functions that i would expose to script would be like this

int XUIElement::getAttributeInt(sf::String searchName)

Is there a way this could be used to simplify the process. I am not really sure if std string addon needs to be modified for using this type of string as opposed to just a uint8 char. Edited by greeniekin
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The <unresolved overloaded function type> is most likely because SFML implements the equality operator as a class method instead of a global function. Try changing the registration to the following:

[code]
r = engine->RegisterObjectMethod("string", "bool opEquals(const string &in) const", asMETHODPR(sf::String, operator ==, (const sf::String &) const, bool), asCALL_THISCALL); assert( r >= 0 );
[/code]

Hopefully it should work. If not, please post what the SFML string class looks like.

The string type is really just an [url="http://www.angelcode.com/angelscript/sdk/docs/manual/doc_register_type.html"]ordinary type[/url] in AngelScript, and is registered just like that with the only exception being the additional [url="http://www.angelcode.com/angelscript/sdk/docs/manual/classas_i_script_engine.html#a95ad30812d89dee425240b49675017a4"]string factory[/url]. I include registration for the std::string because it is the most common, but many developers use their own implementation.



std::basic_string<Uint32> is a completely different type than std::basic_string<char>, a.k.a std::string, so the fact that both are implemented from the same template doesn't really make things any easier here. Edited by Andreas Jonsson
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Never mind I worked out what was wrong.
I was not using namespace sf which is where the global function operators was declared.

I could get around it by using that name space or using the asFUNCTIONPR

asFUNCTIONPR(sf::operator +, (const sf::String &, const sf::String &), sf::String)


all that frustration for something so stupid.

[s]With that change i get the following as an error
[CODE]
error: 'operator==' is not a member of 'sf::String'|
[/CODE]

I also think the function version matches it better.


It uses this outside of the class declaration. like so
[CODE]
SFML_SYSTEM_API bool operator ==(const String& left, const String& right);
[/CODE]

There must be something really stupid I am doing

Also here is a link to the headers of sfml string.
[url="https://github.com/LaurentGomila/SFML/blob/master/include/SFML/System/String.hpp"]https://github.com/L...stem/String.hpp[/url][/s] Edited by greeniekin
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