Doc: Fix documentation warnings for string classes

Task-number: QTBUG-86295
Change-Id: I13033635eecd495b32c98c7ec9318a0102b6f23e
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

src/corelib/text/qanystringview.qdoc

@@ -231,23 +231,6 @@
     The string view will be null if and only if \c{str.isNull()}.
 */
 
-/*!
-    \fn template <typename StdBasicString> QAnyStringView::QAnyStringView(const StdBasicString &str)
-
-    Constructs a string view on \a str. The length is taken from \c{str.size()}.
-
-    \c{str.data()} must remain valid for the lifetime of this string view object.
-
-    This constructor only participates in overload resolution if \c StdBasicString is an
-    instantiation of \c std::basic_string with a compatible character type.
-
-    The string view will be empty if and only if \c{str.empty()}. It is unspecified
-    whether this constructor can result in a null string view (\c{str.data()} would
-    have to return \nullptr for this).
-
-    \sa isNull(), isEmpty(), {Compatible Character Types}
-*/
-
 /*!
     \fn template <typename Char, size_t Size> static QAnyStringView fromArray(const Char (&string)[Size]) noexcept
 
@@ -390,6 +373,19 @@
     \sa operator==(), operator<(), operator>()
 */
 
+/*!
+    \fn QAnyStringView::operator==(QAnyStringView lhs, QAnyStringView rhs)
+    \fn QAnyStringView::operator!=(QAnyStringView lhs, QAnyStringView rhs)
+    \fn QAnyStringView::operator<=(QAnyStringView lhs, QAnyStringView rhs)
+    \fn QAnyStringView::operator>=(QAnyStringView lhs, QAnyStringView rhs)
+    \fn QAnyStringView::operator<(QAnyStringView lhs, QAnyStringView rhs)
+    \fn QAnyStringView::operator>(QAnyStringView lhs, QAnyStringView rhs)
+
+    Operators that compare \a lhs to \a rhs.
+
+    \sa compare()
+*/
+
 /*!
     \fn template <typename QStringLike> qToAnyStringViewIgnoringNull(const QStringLike &s);
     \since 6.0
@@ -405,21 +401,3 @@
     \sa QString::isNull(), QAnyStringView
 */
 
-/*!
-    \fn QAnyStringView::toWCharArray(wchar_t *array) const
-
-    Transcribes this string into the given \a array.
-
-    The caller is responsible for ensuring \a array is large enough to hold the
-    \c wchar_t encoding of this string (allocating the array with space for size()
-    elements is always sufficient). The array is encoded in UTF-16 on
-    platforms where \c wchar_t is 2 bytes wide (e.g. Windows); otherwise (Unix
-    systems), \c wchar_t is assumed to be 4 bytes wide and the data is written
-    in UCS-4.
-
-    \note This function writes no null terminator to the end of \a array.
-
-    Returns the number of \c wchar_t entries written to \a array.
-
-    \sa QString::toWCharArray()
-*/

src/corelib/text/qstring.h

@@ -739,7 +739,7 @@ public:
     {
         return fromUtf8(QByteArrayView(utf8, !utf8 || size < 0 ? qstrlen(utf8) : size));
     }
-#ifdef __cpp_char8_t
+#if defined(__cpp_char8_t) || defined(Q_CLANG_QDOC)
     Q_WEAK_OVERLOAD
     static inline QString fromUtf8(const char8_t *str, qsizetype size)
     { return fromUtf8(reinterpret_cast<const char *>(str), int(size)); }

src/corelib/text/qstringconverter.cpp

@@ -1634,6 +1634,7 @@ static qsizetype toLatin1Len(qsizetype l) { return l + 1; }
     \value System Create a converter to or from the underlying encoding of the
            operating systems locale. This is always assumed to be UTF-8 for Unix based
            systems. On Windows, this converts to and from the locale code page.
+    \omitvalue LastEncoding
 */
 
 /*!
@@ -1838,7 +1839,7 @@ std::optional<QStringConverter::Encoding> QStringConverter::encodingForHtml(QByt
 }
 
 /*!
-    Returns the canonical name for \a encoding.
+    Returns the canonical name for encoding \a e.
 */
 const char *QStringConverter::nameForEncoding(QStringConverter::Encoding e)
 {
@@ -1904,48 +1905,34 @@ const char *QStringConverter::nameForEncoding(QStringConverter::Encoding e)
 */
 
 /*!
-    \fn QByteArray QStringEncoder::operator()(const QString &in)
     \fn QByteArray QStringEncoder::encode(const QString &in)
-
-    Converts \a in and returns the data as a byte array.
-*/
-
-/*!
-    \fn QByteArray QStringEncoder::operator()(QStringView in)
     \fn QByteArray QStringEncoder::encode(QStringView in)
-    \overload
+    \fn QByteArray QStringEncoder::operator()(const QString &in)
+    \fn QByteArray QStringEncoder::operator()(QStringView in)
 
     Converts \a in and returns the data as a byte array.
 */
 
-/*!
-    \fn QByteArray QStringEncoder::operator()(const QChar *in, qsizetype length)
-    \fn QByteArray QStringEncoder::encode(const QChar *in, qsizetype length)
-    \overload
-
-    Converts \a length QChars from \a in and returns the data as a byte array.
-*/
-
 /*!
     \fn qsizetype QStringEncoder::requiredSpace(qsizetype inputLength) const
 
     Returns the maximum amount of characters required to be able to process
     \a inputLength decoded data.
 
-    \sa appendToBuffer
+    \sa appendToBuffer()
 */
 
 /*!
-    \fn char *QStringEncoder::appendToBuffer(char *out, const QChar *in, qsizetype length)
+    \fn char *QStringEncoder::appendToBuffer(char *out, QStringView in)
 
-    Encodes \a length QChars from \a in and writes the encoded result into the buffer
-    starting at \a out. Returns a pointer to the end of data written.
+    Encodes \a in and writes the encoded result into the buffer
+    starting at \a out. Returns a pointer to the end of the data written.
 
-    \a out needs to be large enough to be able to hold all the decoded data. Use
-    \l{requiredSpace} to determine the maximum size requirements to be able to encode
-    a QChar buffer of \a length.
+    \note \a out must be large enough to be able to hold all the decoded data. Use
+    requiredSpace() to determine the maximum size requirement to be able to encode
+    \a in.
 
-    \sa requiredSpace
+    \sa requiredSpace()
 */
 
 /*!
@@ -2009,28 +1996,12 @@ const char *QStringConverter::nameForEncoding(QStringConverter::Encoding e)
 /*!
     \fn QString QStringDecoder::operator()(const QByteArray &ba)
     \fn QString QStringDecoder::decode(const QByteArray &ba)
+    \fn QString QStringDecoder::operator()(QByteArrayView ba)
+    \fn QString QStringDecoder::decode(QByteArrayView ba)
 
     Converts \a ba and returns the data as a QString.
 */
 
-/*!
-    \fn QString QStringDecoder::operator()(const char *in, qsizetype size)
-    \fn QString QStringDecoder::decode(const char *in, qsizetype size)
-    \overload
-
-    Converts a byte array containing the first \a size bytes of the array \a in
-    and returns the data as a QString.
-*/
-
-/*!
-    \fn QString QStringDecoder::operator()(const char *chars)
-    \fn QString QStringDecoder::decode(const char *chars)
-    \overload
-
-    Converts \a chars and returns the data as a QString. \a chars is assumed to
-    point to a \c{\0}-terminated string and its length is determined dynamically.
-*/
-
 /*!
     \fn qsizetype QStringDecoder::requiredSpace(qsizetype inputLength) const
 

src/corelib/text/qstringview.cpp

@@ -305,7 +305,7 @@ QT_BEGIN_NAMESPACE
 */
 
 /*!
-    \fn template <typename StdBasicString> QStringView::QStringView(const StdBasicString &str)
+    \fn template <typename Container, if_compatible_container<Container>> QStringView::QStringView(const Container &str)
 
     Constructs a string view on \a str. The length is taken from \c{str.size()}.
 
@@ -784,6 +784,19 @@ QT_BEGIN_NAMESPACE
     \sa operator==(), operator<(), operator>()
 */
 
+/*!
+    \fn QStringView::operator==(QStringView lhs, QStringView rhs)
+    \fn QStringView::operator!=(QStringView lhs, QStringView rhs)
+    \fn QStringView::operator< (QStringView lhs, QStringView rhs)
+    \fn QStringView::operator<=(QStringView lhs, QStringView rhs)
+    \fn QStringView::operator> (QStringView lhs, QStringView rhs)
+    \fn QStringView::operator>=(QStringView lhs, QStringView rhs)
+
+    Operators for comparing \a lhs to \a rhs.
+
+    \sa compare()
+*/
+
 /*!
     \fn bool QStringView::startsWith(QStringView str, Qt::CaseSensitivity cs) const
     \fn bool QStringView::startsWith(QLatin1String l1, Qt::CaseSensitivity cs) const