How do you pass a string array into QtConcurrent::run?

Question

In my program QtConcurrent Run does not accept my array of strings or my array of bools. Do I need to convert them into QByteArrays for the data to be passed in?

According to the documentation this works:

extern QString someFunction(const QByteArray &input);

QByteArray bytearray = ...;

QFuture<QString> future = QtConcurrent::run(someFunction, bytearray);
...
QString result = future.result();

In my program this does not work:

extern void test(string args[]);
string args[7]={"blue"};
QFuture<void> future = QtConcurrent::run(test, args);

Error: C2075-- array initialization requires a brace-enclosed initializer list

Why `string args[7]` rather than `std::array`? Why would you *ever* prefer a raw C-style array over `std::array` or `std::vector`? — Jesper Juhl, Aug 14 '19 at 19:42
I did not know about that but I will look into it. So far in c++ i have only used vectors and c-style arrays. — BDD, Aug 14 '19 at 19:44

score 0 · Answer 1 · answered Aug 14 '19 at 20:45

0

Never use C-Style Arrays in QtConcurrent::run. Use C++ std::array instead. Thank you Jesper Juhl!

answered Aug 14 '19 at 20:45

BDD

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How do you pass a string array into QtConcurrent::run?

1 Answers1