Details
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Type:
Sub-task
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Status: Closed
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Priority:
P1: Critical
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Resolution: Done
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Fix Version/s: 5.0.0 Beta 1, 5.0.0
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Component/s: Core: Object Model
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Labels:None
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Technical Risk:Normal
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Commits:f95181c7bb340744a0ce172e8c5a8fcdc2543297
Description
The meta-object data is currently storing type information for methods as strings (signature, parameters, return type). This makes introspection through QMetaMethod utterly inefficient; the signature is re-parsed again at runtime, type names are copied to QByteArrays, and the types have to be looked up by name (QMetaType::type()).
If the meta-type id of the return type and parameter types can be computed at meta-object definition time, they could be stored in the
meta-data for fast and easy retrieval. This is already (partially) supported for meta-properties (see QMetaProperty::userType()), but not for methods.
This change is being implemented at http://codereview.qt-project.org/#change,14763
Once this is done, we should also remove support for the old (Qt4) meta-data revisions (<= 6).
Attachments
Issue Links
- is required for
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QTBUG-25005 Critical issues for Qt5 Beta 1
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- Closed
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| For Gerrit Dashboard: QTBUG-24154 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 14763,25 | Say hello to meta-object revision 7 ("Qt 5 meta-objects") | master | qt/qtbase | Status: ABANDONED | 0 | 0 |
| 16885,6 | Change the representation of meta-object string data | master | qt/qtbase | Status: ABANDONED | 0 | 0 |
| 16904,5 | Rename QMetaMethod::signature() to methodSignature() | master | qt/qtbase | Status: ABANDONED | 0 | 0 |
| 16915,8 | Long live Qt5 meta-object method/property descriptors | master | qt/qtbase | Status: ABANDONED | 0 | 0 |
| 17346,3 | Change the representation of meta-object string data | containers | qt/qtbase | Status: MERGED | +2 | 0 |
| 17347,1 | Rename QMetaMethod::signature() to methodSignature() | containers | qt/qtbase | Status: MERGED | +2 | 0 |
| 17348,1 | Long live Qt5 meta-object method/property descriptors | containers | qt/qtbase | Status: MERGED | +2 | 0 |