This is causing huge code bloat because everything is a local lambda.
Instead, pass direct type-erased function and data pointers to the
replacement function. Testing with tst_qcborvalue, this reduces the
compilation time and the output binary size significantly:
Before After
Compiler Time Size Time Size
GCC 13.2 136.99 s 202.3 MB 13.88 s 14.3 MB
GCC 14.0 131.49 s 202.7 MB 14.69 s 14.4 MB
Clang 17 77.2 s 146.7 MB 13.62 s 12.2 MB
Clang 18 141.9 s 187.1 MB 13.62 s 12.4 MB
This causes a difference in how toString() overloads are
found. Previously it would match far more overloads because the
toString() calls were expanded by the macro. Now, we depend on
Argument-Dependent Lookup and associated namespaces, so toString()
overloads should not be in the QTest namespace any more.
With this patch applied, the testlib testcase of tst_selftest
started failing, because nullptr is now handled differently.
However, I consider it as a bugfix, because previously it was
falling back to a default implementation, and now it is using
the QTest::toString(std::nullptr_t) overload, which is a
desired behavior. Update the reference files for tst_selftest
with the new expected output.
Task-number: QTBUG-124272
Change-Id: Ie28eadac333c4bcd8c08fffd17c5484186accdf6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
c14f399d2a