From 1869615fc959c70a334e666ebf95ff595a3d6e67 Mon Sep 17 00:00:00 2001 From: Giuseppe D'Angelo Date: Wed, 4 Nov 2020 15:19:26 +0100 Subject: QChar: make construction from integral explicit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit QChar should not be convertible from any integral type except from char16_t, short and possibly char (since it's a direct superset). David provided the perfect example: if (str == 123) { ~~~ } compiles, with 123 implicitly converted to QChar (str == "123" was meant instead). But similarly one can construct other scenarios where QString(123) gets accidentally used (instead of QString::number(123)), like QString s; s += 123;. Add a macro to revert to the implicit constructors, for backwards compatibility. The breaks are mostly in tests that "abuse" of integers (arithmetic, etc.). Maybe it's time for user-defined literals for QChar/QString, but that is left for another commit. [ChangeLog][Potentially Source-Incompatible Changes][QChar] QChar constructors from integral types are now by default explicit. It is recommended to use explicit conversions, QLatin1Char, QChar::fromUcs4 instead of implicit conversions. The old behavior can be restored by defining the QT_IMPLICIT_QCHAR_CONSTRUCTION macro. Change-Id: I6175f6ab9bcf1956f6f97ab0c9d9d5aaf777296d Reviewed-by: Volker Hilsheimer Reviewed-by: Tor Arne Vestbø --- tests/auto/corelib/io/qfile/tst_qfile.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tests/auto/corelib/io/qfile/tst_qfile.cpp') diff --git a/tests/auto/corelib/io/qfile/tst_qfile.cpp b/tests/auto/corelib/io/qfile/tst_qfile.cpp index e5b7051997..e408cd3e48 100644 --- a/tests/auto/corelib/io/qfile/tst_qfile.cpp +++ b/tests/auto/corelib/io/qfile/tst_qfile.cpp @@ -3182,7 +3182,7 @@ void tst_QFile::mapResource() QCOMPARE(file.error(), error); QVERIFY((error == QFile::NoError) ? (memory != 0) : (memory == 0)); if (error == QFile::NoError) - QCOMPARE(QString(memory[0]), QString::number(offset + 1)); + QCOMPARE(QString(QChar(memory[0])), QString::number(offset + 1)); QVERIFY(file.unmap(memory)); } -- cgit v1.2.3