Implement support for '0b' prefix in toInt() etc

[ChangeLog][QtCore][QByteArray/QByteArrayView/QLatin1String/QString/QStringView]
The string-to-integer conversion functions (toInt() etc) now support
the 0b prefix for binary literals. That means that base = 0 will
recognize 0b to mean base = 2 and an explicit base = 2 argument will
make toInt() (etc) skip an optional 0b.

[ChangeLog][QtCore][Important Behavior Changes] Due to the
newly-introduced support for 0b (binary) prefixes in integer parsing,
some strings that were previously rejected as invalid now parse as
valid. E.g., Qt 6.3 with autodetected bases would have tried to parse
"0b1" as an octal value and fail, whereas 6.4 will parse it as the
binary literal and return 1.

Fixes: QTBUG-85002
Change-Id: Id4eff72d63619080e5afece4d059b6ffd52f28c8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
index c92cb0ad92..6a8f62d4b7 100644
--- a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
+++ b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
@@ -2654,14 +2654,13 @@ void tst_QStringApiSymmetry::toNumberWithBases_data()
         const char prefix[3];
         int base;
     } bases[] = {
-        { "",    2 }, // should be {"0b", 2}, but Qt lacks support for the 0b prefix (QTBUG-85002)
+        { "0b",  2 },
         { "0",   8 },
         { "",   10 },
         { "0x", 16 },
     };
 
     const auto check = [&](const char *input, qint64 n2, qint64 n8, qint64 n10, qint64 n16, bool result) {
-        
         for (const auto &e : bases) {
             const QString data = QLatin1StringView(e.prefix) + QString::fromUtf8(input);
             const auto row = [&](int base) {
@@ -2678,8 +2677,6 @@ void tst_QStringApiSymmetry::toNumberWithBases_data()
                         << data << base << select(e.base /* NOT base! */) << result;
             };
             row(e.base); // explicit base
-            if (e.base == 2)
-                continue; // Qt doesn't know 0b (yet, QTBUG-85002), so nothing to auto-detect 
             row(0);      // automatically detected base
         }
     };