Qt won't recognize QString::replace function.

[Warumato]

Hello
I've got trouble with this line of code:

expr.replace(*start - 1, *end - *start - 1, result_s);

expr.replace(*start - 1, *end - *start - 1, result_s);

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where *start and *end are pointers to integers(table adresses), and result_s is a string.

The error message: no matching member function for call to 'replace'.

This is a precise function I meant to call: https://doc.qt.io/qt-5/qstring.html#replace .

Using Qt Creator 4.11.0 with C++.