Details
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Bug
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Resolution: Incomplete
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Not Evaluated
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None
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5.3.0 Alpha
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None
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gcc 4.8.1
Description
Commit b8a38a6737acd670d92197ca5b009590d9fd8a9c breaks compilation of the following code if Q_COMPILER_VARIADIC_MACROS is not defined:
Q_DECLARE_LOGGING_CATEGORY(testlog) Q_LOGGING_CATEGORY(testlog, "HelloWorld") int main() { qCDebug(testlog) << "Hello"; return 0; }
The two macros are resolved to:
extern const QLoggingCategory &testlog(); const QLoggingCategory &testlog() { static const QLoggingCategory category("HelloWorld"); return category; }
and the
qCDebug(testlog) << "Hello";
call is resolved to
QMessageLogger("main.cpp", 12, __PRETTY_FUNCTION__).debug(testlog)
because of the new
#define qCDebug qDebug
in qloggingcategory.h
This code however doesn't compile, because you'd have to pass 'testlog()' and
not 'testlog' as parameter to 'debug()'.
Attachments
| For Gerrit Dashboard: QTBUG-37283 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 83886,3 | Logging: Mention 'best practices' for using QLoggingCategory | release | qt/qtbase | Status: MERGED | +2 | 0 |