libclang: document the purpose of createNull()
llvm-svn: 174195
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@ -29,6 +29,8 @@ struct CXStringBuf;
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CXString createEmpty();
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/// \brief Create a CXString object for an NULL string.
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///
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/// A NULL string should be used as an "invalid" value in case of errors.
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CXString createNull();
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/// \brief Create a CXString object from a C string.
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