How to use ICU C++ API on macOS

Rob N

2022-08-12T23:57:30

I would like to use ICU's C++ API, specifically the UnicodeString class, in a macOS app. I see that I can include headers for the C API from Xcode, but I don't see headers for the C++ API.

% PLAT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform
% ls $PLAT/Developer/SDKs/MacOSX.sdk/usr/include/unicode
localpointer.h      ptypes.h        ...     ustring.h        
... other C API headers ...

But unistr.h and other C++ headers are not there. The unistr.h file declares the UnicodeString class.

However, if I look at this library file, it seems the library does contain the class.

% c++filt < $PLAT/Developer/SDKs/MacOSX.sdk/usr/lib/libicucore.A.tbd | grep icu::UnicodeString
...
icu::UnicodeString::UnicodeString(char16_t const*),  
icu::UnicodeString::UnicodeString(char16_t const*, int), 
icu::UnicodeString::UnicodeString(char const*),  
...

Anyone using C++ ICU for a macOS app? How do you do it?

Copyright License：
Author:「Rob N」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/73336852/how-to-use-icu-c-api-on-macos

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