diff options
authorGiuseppe D'Angelo <>2020-11-09 18:01:59 +0100
committerGiuseppe D'Angelo <>2020-11-10 09:31:54 +0000
commit06799b58dd0e9a2f637e6e21949390e3b2b17733 (patch)
parent531a53c796a20fbeeb55536330ec718ef2bb7cb2 (diff)
Q_PRIMITIVE_TYPE: improve the documentation
A key piece of information missing from Q_PRIMITIVE_TYPE documentation is that for them value initialization must equal memset()ting with zeroes. A type like QPoint is primitive because `QPoint p;` is initialized to (0, 0), but a type like QSize is movable (and NOT primitive) because `QSize s;` is actually initialized to (-1, -1). Amend the docs. Change-Id: I121684810da46be5d0579c7d3de945149390a32a Reviewed-by: Lars Knoll <> (cherry picked from commit b8b75cdcfa71189c7726607be7b66d0ddeaae372) Reviewed-by: Volker Hilsheimer <>
1 files changed, 3 insertions, 2 deletions
diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index 01f534cc0f..51b8379b3d 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -4031,8 +4031,9 @@ bool qunsetenv(const char *varName)
\li \c Q_PRIMITIVE_TYPE specifies that \a Type is a POD (plain old
data) type with no constructor or destructor, or else a type where
- every bit pattern is a valid object and memcpy() creates a valid
- independent copy of the object.
+ every bit pattern is a valid object; memset()ting memory to zero
+ creates a value-initialized instance of the type; and memcpy()ing
+ creates a valid independent copy of an object.
\li \c Q_MOVABLE_TYPE specifies that \a Type has a constructor
and/or a destructor but can be moved in memory using \c
memcpy(). Note: despite the name, this has nothing to do with move