Ignore curly brackets inside string literals in data expressions

[Dakror]

Data expressions like {{ 'test {} with format library' }} currently dont work with libraries like fmt, because curly braces inside the string trigger an error. This PR fixes this.

[Dakror]

I'm currently integrating sprintf as a function for data expressions (in combination with my i18n strings) based on the fmt lib.
I guess you wouldn't want to add a dependency, but when I'm done i could send a PR. It involves defining a formatter for the Variant type

[mikke89]

Thanks!

I think it makes more sense to move in_string as an out parameter into XMLParseTools::ParseDataBrackets and do this parsing there. Also, is DataViewText::Initialize affected by this? Maybe we want to use the same XMLParseTools::ParseDataBrackets in there?

Your translation stuff sounds cool, I'd love to see more of it. We wouldn't want fmt as a core dependency, could it be integrated into the databinding sample perhaps?

[Dakror]

The issue definitely is the variant type and non-variadic printf-usage. That's why i had to use the fmt library.

[mikke89]

Thanks!

Looks good to me, only there is an issue with the XMLParseTools.cpp diff, is it the line endings again?

[Dakror]

yeah thanks, i dont know why. i have autocrlf off...

[mikke89]

I think that should be on if you're on Windows?

[Dakror]

oh does it? okay