QByteArrayView: move array size deduction feature to fromArray

1. Make the ctor unable to construct a QByteArrayView from
array literals other than 'char'.
    With the new behavior it would either be (very likely) unintended to
    pass e.g. a std::byte array to the ctor. And it would be confusing
    because you would get different sizes based on signed-ness.
2. Introduce fromArray
    Only supports array literals. Constructs a view of the full size.
    Explicit so it shouldn't be surprising.

Change-Id: Ifdb55eb21057dfe7053b2561bd81e2c9825e9bc6
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 0 insertions, 7 deletions

diff --git a/src/corelib/doc/snippets/code/src_corelib_text_qbytearrayview.cpp b/src/corelib/doc/snippets/code/src_corelib_text_qbytearrayview.cpp
index 31a2107c62..d70caa2650 100644
--- a/src/corelib/doc/snippets/code/src_corelib_text_qbytearrayview.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_text_qbytearrayview.cpp
@@ -58,10 +58,3 @@
     void fun(QByteArrayView bv);
     void fun(char ch) { fun(QByteArrayView(&ch, 1)); }
 //! [1]
-
-void wrapper() {
-    const char array[1] = { 0 };
-//! [2]
-    auto bv = QByteArrayView(array, std::size(array)); // using C++17 std::size()
-//! [2]
-}