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Userland: static vs non-static constexpr variables

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Problem:
- `static` variables consume memory and sometimes are less
  optimizable.
- `static const` variables can be `constexpr`, usually.
- `static` function-local variables require an initialization check
  every time the function is run.

Solution:
- If a global `static` variable is only used in a single function then
  move it into the function and make it non-`static` and `constexpr`.
- Make all global `static` variables `constexpr` instead of `const`.
- Change function-local `static const[expr]` variables to be just
  `constexpr`.
This commit is contained in:
Lenny Maiorani 2021-05-19 09:32:07 -06:00 • committed by Linus Groh
parent 17ff895e1c
commit 800ea8ea96
Notes: sideshowbarker 2024-07-18 17:38:29 +09:00
38 changed files with 192 additions and 184 deletions
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13
Userland/Libraries/LibGUI/Calendar.cpp
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@ -5,6 +5,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Array.h>
#include <LibCore/DateTime.h>
#include <LibGUI/Calendar.h>
#include <LibGUI/Painter.h>
@ -16,21 +17,21 @@ REGISTER_WIDGET(GUI, Calendar);
namespace GUI {
static const char* long_day_names[] = {
static constexpr Array long_day_names = {
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
};
static const char* short_day_names[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static const char* mini_day_names[] = { "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" };
static const char* micro_day_names[] = { "S", "M", "T", "W", "T", "F", "S" };
static constexpr Array short_day_names = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static constexpr Array mini_day_names = { "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" };
static constexpr Array micro_day_names = { "S", "M", "T", "W", "T", "F", "S" };
static const char* long_month_names[] = {
static constexpr Array long_month_names = {
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
};
static const char* short_month_names[] = {
static constexpr Array short_month_names = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};