const unsigned char * to std :: string [英] const unsigned char * to std::string
本文介绍了const unsigned char * to std :: string的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
sqlite3_column_text返回一个const unsigned char *,我如何将它转换为std :: string?我试过std :: string(),但我得到一个错误。
sqlite3_column_text returns a const unsigned char*, how do I convert this to a std::string? I've tried std::string(), but I get an error.
代码:
temp_doc.uuid = std::string(sqlite3_column_text(this->stmts.read_documents, 0));
错误:
1>.\storage_manager.cpp(109) : error C2440: '<function-style-cast>' : cannot convert from 'const unsigned char *' to 'std::string'
1> No constructor could take the source type, or constructor overload resolution was ambiguous
推荐答案
您可以尝试:
temp_doc.uuid = std::string(reinterpret_cast<const char*>(
sqlite3_column_text(this->stmts.read_documents, 0)
));
std :: string
构造函数 const unsigned char *
,显然它不会。
While std::string
could have a constructor that takes const unsigned char*
, apparently it does not.
您可以查看这个有些相关的问题:为什么do C ++ streams使用char而不是unsigned char?
Why not, then? You could have a look at this somewhat related question: Why do C++ streams use char instead of unsigned char?
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