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giunioninfo: Split success and return value for get_discriminator_offset()

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Otherwise there’s no obvious suitable return value to return when the
union is *not* discriminated.

This is an API break, but libgirepository has not been in a stable
release yet, so that’s fine.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3155
This commit is contained in:
Philip Withnall
2024-02-06 13:34:17 +00:00
parent 702719dee9
commit 11e8075e51
4 changed files with 20 additions and 7 deletions
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docs/reference/girepository/migrating-gi.md
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@@ -72,5 +72,6 @@ your code if integer type warnings are enabled.
| `g_type_info_get_array_length` | [method@GIRepository.TypeInfo.get_array_length_index] |
| `g_typelib_new_from_*` | All replaced with `gi_typelib_new_from_bytes()` |
| `GI_FUNCTION_THROWS` and `GI_VFUNC_THROWS` | [method@GIRepository.CallableInfo.can_throw_gerror] |
| `g_union_info_get_discriminator_offset` | Split success and failure return values out into a new out-argument and return value |
| `g_union_info_get_copy_function` | [method@GIRepository.UnionInfo.get_copy_function_name] |
| `g_union_info_get_free_function` | [method@GIRepository.UnionInfo.get_free_function_name] |