CODEWITHSUNDEEP
c++qtapi
user1055604
user1055604

Reputation: 1672

QString fromStdString static function instead of constructor

What is the reason for the choice of API below:

QString QString::fromStdString(const std::string & str) [static]

Why is there a need for calling a static function when we could have a constructor as follows:

QString::QString(const std::string & str)

There are similar constructors for the c string representation (char*), std::string being the exception. What is the reason for that?

Upvotes: 0

Views: 407

Answers (1)

Massa
Massa

Reputation: 8982

Qt predates explicit constructors, and it can't break its existing clients gratuitously. One other reason would be that std::string and QString are not necessarily in the same encoding/codepage and the static methods make explicit that some more expensive conversion is happening.

Upvotes: 2

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