CODEWITHSUNDEEP
c++qtc-stringsllvm-clangstring-conversion
Joachim W
Joachim W

Reputation: 8177

qFatal argument: conversion of QString to const char* results in warning "format string is not a string literal"

Under Qt5.9 and clang++-6.0.0,

QString ret;
qFatal(ret.toLatin1().constData());

yields a warning "format string is not a string literal".

What's wrong, and what is the right way to accomplish the required conversion from QString to a C string?

PS: A closely related question is Converting QString to char*. Here, however, different solutions are possible thanks to the printf-like argument list of qFatal.

Upvotes: 3

Views: 2186

Answers (1)

Joachim W
Joachim W

Reputation: 8177

qFatal allows for the variadic ... argument known from printf. Thus

qFatal("%s", ret.toLatin1().constData());

and the warning is gone.

Upvotes: 2

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