0fd99a9f16
Instead, add a method on `GIRegisteredTypeInfo` which indicates whether
the registered type is a boxed type. This will return true for
`GIStructInfo` and `GIUnionInfo` instances which are boxed (not all
structs and unions are).
This makes `GIBoxedInfo` redundant, and it’ll be dropped in a following
commit.
---
There are several different things which typelibs need to be able to
represent:
1. Plain old datatype (POD) structs
2. POD unions
3. Structs with a copy func and/or free func
4. Unions with a copy func and/or free func
5. Structs which are the ‘GType struct’ for an object or interface (i.e.
the class or instance or interface struct)
6. Structs with a copy func and free func *and* boxed GType
7. Unions with a copy func and free func *and* boxed GType
8. Boxed GTypes which represent something other than a struct or union
So there’s a lot going on here. In commit
e28078c70cbf4a57c7dbd39626f43f9bd2674145, a lot of this was reworked,
and support was added for boxed unions and boxed ‘others’ (the last item
on the list above).
Since then, support for boxed types other than structs seems to have
atrophied a bit, and the whole lot has got a bit confusing.
It was perhaps less confusing when all the `GIBaseInfo` subclasses were
actually aliases of each other, but now they have subtype relationships,
the position of `GIBoxedInfo` in that type hierarchy has become unclear.
How is it related to `GIStructInfo`, `GIUnionInfo` and
`GIRegisteredTypeInfo`?
Since a boxed type is necessarily a `GIRegisteredTypeInfo`, and the
methods of `GIRegisteredTypeInfo` are all written to allow a `GType` to
be optional, so that `GIStructInfo` and `GIUnionInfo` can safely derive
from it and still be used to represent plain old datatypes without
`GType`s, it makes sense to add a method to `GIRegisteredTypeInfo` to
indicate that the registered type is derived from `G_TYPE_BOXED`.
Accordingly, the things above are now represented in libgirepository’s
type system as:
1. `GIStructInfo` instance, `GIRegisteredTypeInfo` methods return no
`GType` info
2. `GIUnionInfo` instance similarly
3. `GIStructInfo` instance, `GIRegisteredTypeInfo` methods return no
`GType` info, `gi_struct_info_get_{copy,free}_function_name()` return
non-`NULL` values
4. `GIUnionInfo` instance similarly
5. `GIStructInfo` instance, `GIRegisteredTypeInfo` methods return no
`GType` info, `gi_struct_info_is_gtype_struct()` returns true
6. `GIStructInfo` instance, `GIRegisteredTypeInfo` methods return valid
`GType` information, `gi_registered_type_info_is_boxed()` returns
true, `gi_struct_info_get_{copy,free}_function_name()` return
`NULL` values (because the copy/free functions are hidden inside the
boxed type registration at runtime)
7. `GIUnionInfo` instance similarly
8. Not representable, but could be represented in future by re-adding a
`GIBoxedInfo` type which derives from `GIRegisteredTypeInfo` and is
used solely for boxed ‘other’ types, *not* boxed structs or unions
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Fixes: #3245
|
||
|---|---|---|
| .gitlab-ci | ||
| .reuse | ||
| docs | ||
| fuzzing | ||
| gio | ||
| girepository | ||
| glib | ||
| gmodule | ||
| gobject | ||
| gthread | ||
| LICENSES | ||
| m4macros | ||
| po | ||
| subprojects | ||
| tests | ||
| tools | ||
| .clang-format | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .gitmodules | ||
| .lcovrc | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| glib.doap | ||
| INSTALL.md | ||
| meson_options.txt | ||
| meson.build | ||
| NEWS | ||
| README.md | ||
| SECURITY.md | ||
GLib
GLib is the low-level core library that forms the basis for projects such as GTK and GNOME. It provides data structure handling for C, portability wrappers, and interfaces for such runtime functionality as an event loop, threads, dynamic loading, and an object system.
The official download locations are: https://download.gnome.org/sources/glib
The official web site is: https://www.gtk.org/
Installation
See the file ‘INSTALL.md’. There is separate and more in-depth documentation for building GLib on Windows.
Supported versions
Upstream GLib only supports the most recent stable release series, the previous stable release series, and the current development release series. All older versions are not supported upstream and may contain bugs, some of which may be exploitable security vulnerabilities.
See SECURITY.md for more details.
Documentation
API documentation is available online for GLib for the:
Discussion
If you have a question about how to use GLib, seek help on GNOME’s Discourse
instance. Alternatively, ask a question
on StackOverflow and tag it glib.
Reporting bugs
Bugs should be reported to the GNOME issue tracking system. You will need to create an account for yourself. You may also submit bugs by e-mail (without an account) by e-mailing incoming+gnome-glib-658-issue-@gitlab.gnome.org, but this will give you a degraded experience.
Bugs are for reporting problems in GLib itself, not for asking questions about how to use it. To ask questions, use one of our discussion forums.
In bug reports please include:
- Information about your system. For instance:
- What operating system and version
- For Linux, what version of the C library
- And anything else you think is relevant.
- How to reproduce the bug.
- If you can reproduce it with one of the test programs that are built
in the
tests/subdirectory, that will be most convenient. Otherwise, please include a short test program that exhibits the behavior. As a last resort, you can also provide a pointer to a larger piece of software that can be downloaded.
- If you can reproduce it with one of the test programs that are built
in the
- If the bug was a crash, the exact text that was printed out when the crash occurred.
- Further information such as stack traces may be useful, but is not necessary.
Contributing to GLib
Please follow the contribution guide to know how to start contributing to GLib.
Patches should be submitted as merge requests to gitlab.gnome.org. If the patch fixes an existing issue, please refer to the issue in your commit message with the following notation (for issue 123):
Closes: #123
Otherwise, create a new merge request that introduces the change. Filing a separate issue is not required.