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Lars Knoll 9d36032370 Implement QMetaType::canConvert() and use it in QVariant 
Use the fact that we return the conversion function as a lambda
to find out reliably whether a conversion between two types
can be done.

This requires some minor adjustments to our tests:

* Nothing can convert to an unknown type and vice versa
* Adjust results to the fact that we don't convert from char
  to QString anymore (where the old method was incorrect)
* QStringList->QString requires some adjustments, as we only
  convert if the string list has exactly one element. For now
  we return true in canConvert(), but the conversion behavior
  in this case is something we should rethink, as it is very
  surprising.

Change-Id: I3f5f87ee9cb99d690f5a7d13b13d6a6313d8038e
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>
2020-08-24 00:18:24 +02:00
.github/workflows GitHub Actions: Fix actions build 2020-08-14 21:40:28 +02:00
bin Windows: Avoid syncqt needlessly re-generating headers 2020-08-19 12:46:09 +02:00
cmake CMake: Implement configure -gdb-index 2020-08-23 11:05:01 +02:00
coin CMake: Use CMAKE_AUTOGEN_VERBOSE to see moc invocations 2020-07-24 17:33:17 +02:00
config.tests CMake: Skip regeneration of manual compile test project 2020-04-09 11:26:46 +02:00
dist Remove last remainings of Qt Quick 1 imports 2020-05-25 11:48:12 +02:00
doc Fix return of uninitialized pointer in guiloader example 2020-07-16 21:52:26 +02:00
examples Automatically register data/debug stream operations in QMetaType 2020-08-24 00:17:03 +02:00
lib
mkspecs configure: Explicitly enable float-divide-by-zero with ubsan 2020-08-07 01:21:07 +02:00
qmake Automatically register data/debug stream operations in QMetaType 2020-08-24 00:17:03 +02:00
src Implement QMetaType::canConvert() and use it in QVariant 2020-08-24 00:18:24 +02:00
tests Implement QMetaType::canConvert() and use it in QVariant 2020-08-24 00:18:24 +02:00
util pro2cmake.py: support multiple versions in QT_QML_SOURCE_VERSION 2020-08-23 11:05:15 +02:00
.cmake.conf pro2cmake.py: Generate .cmake.conf files for versioning 2020-04-30 17:44:03 +00:00
.gitattributes
.gitignore git: Ignore CMakeLists.txt.user 2020-07-24 17:26:51 +02:00
.lgtm.yml Skip LGTM analysis for the bootstrap library and tools 2020-07-16 01:04:34 +02:00
.prev_qt_cmdline.cmake CMake: Re-implement configure/qmake's command line handling in CMake 2020-08-17 08:08:20 +02:00
.qmake.conf Bump version 2020-02-02 13:41:14 +01:00
.tag
CMakeLists.txt CMake: Fix tst_moc to build when tests are built as part of Qt tree 2020-08-23 11:04:20 +02:00
config_help.txt Make -qtlibinfix affect the names of plugins by default 2020-07-13 20:30:18 +02:00
configure CMake: Fix configure -redo on Unix 2020-08-20 17:07:09 +02:00
configure.bat CMake: Fix top-level configure 2020-07-16 15:00:37 +02:00
configure.cmake CMake: Implement configure -gdb-index 2020-08-23 11:05:01 +02:00
configure.json Remove Qt 5.1 binary-compatibility warning 2020-08-18 12:55:38 +02:00
configure.pri Treat -xplatform or -device-option as being a cross compilation 2020-07-08 19:18:09 +02:00
dependencies.yaml Re-add dependencies.yaml so repos outside qt5 can be built with Coin 2019-09-19 17:07:36 +00:00
header.BSD Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.FDL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL-EXCEPT Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3-COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-NOGPL2 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-ONLY Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.MIT qsimd: add support for new x86 CPU features 2018-05-05 06:20:07 +00:00
INSTALL INSTALL: Remove outdated reference to Windows CE 2019-02-13 13:01:57 +00:00
LICENSE.FDL
LICENSE.GPL2 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3-EXCEPT Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPLv3 Remove LICENSE.GPLv3, LICENSE.LGPLv21, LGPL_EXCEPTION.txt 2018-04-16 11:02:14 +00:00
LICENSE.QT-LICENSE-AGREEMENT Update enterprise license agreement v4.2.1 2019-12-18 13:07:19 +02:00
qt_cmdline.cmake CMake: Re-implement configure/qmake's command line handling in CMake 2020-08-17 08:08:20 +02:00
qtbase.pro Update qmake before building src 2020-08-19 18:25:51 +02:00
sync.profile Remove last remaining bits of QtPlatformHeaders 2020-08-04 07:12:32 +02:00