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Documentation: Replace TRY() example in Patterns.md

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The `Menubar::add_menu()` call used in the previous code snippet no
longer returns `ErrorOr`, which defeats the purpose of the example.
This commit is contained in:
Tim Ledbetter 2023-09-28 23:08:27 +01:00 committed by Sam Atkins
parent dcf3bdcb9a
commit d054116012
Notes: sideshowbarker 2024-07-18 01:43:16 +09:00 
Author: https://github.com/tcl3
Commit: https://github.com/SerenityOS/serenity/commit/d054116012
Pull-request: https://github.com/SerenityOS/serenity/pull/21262
Reviewed-by: https://github.com/AtkinsSJ ✅
1 changed files with 11 additions and 8 deletions
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19
Documentation/Patterns.md
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@ -18,21 +18,24 @@ result of the contents of the TRY will be the result of the macro's execution.
### Examples:
Example from LibGUI:
Example from LibGfx:
```cpp
#include <AK/Try.h>
... snip ...
ErrorOr<NonnullRefPtr<Menu>> Window::try_add_menu(String name)
ErrorOr<NonnullRefPtr<Bitmap>> Bitmap::create_shareable(BitmapFormat format, IntSize size, int scale_factor)
{
auto menu = m_menubar->add_menu({}, move(name));
if (m_window_id) {
menu->realize_menu_if_needed();
ConnectionToWindowServer::the().async_add_menu(m_window_id, menu->menu_id());
}
return menu;
if (size_would_overflow(format, size, scale_factor))
return Error::from_string_literal("Gfx::Bitmap::create_shareable size overflow");
auto const pitch = minimum_pitch(size.width() * scale_factor, format);
auto const data_size = size_in_bytes(pitch, size.height() * scale_factor);
auto buffer = TRY(Core::AnonymousBuffer::create_with_size(round_up_to_power_of_two(data_size, PAGE_SIZE)));
auto bitmap = TRY(Bitmap::create_with_anonymous_buffer(format, buffer, size, scale_factor, {}));
return bitmap;
}
```