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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
38 changed files with 192 additions and 184 deletions
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6
Userland/Libraries/LibGfx/ClassicStylePainter.cpp
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@ -354,7 +354,7 @@ void ClassicStylePainter::paint_radio_button(Painter& painter, const IntRect& re
painter.blit(rect.location(), bitmap, bitmap.rect());
}
static const char* s_checked_bitmap_data = {
static constexpr char s_checked_bitmap_data[] = {
" "
" # "
" ## "
@ -367,8 +367,8 @@ static const char* s_checked_bitmap_data = {
};
static Gfx::CharacterBitmap* s_checked_bitmap;
static const int s_checked_bitmap_width = 9;
static const int s_checked_bitmap_height = 9;
static constexpr int s_checked_bitmap_width = 9;
static constexpr int s_checked_bitmap_height = 9;
void ClassicStylePainter::paint_check_box(Painter& painter, const IntRect& rect, const Palette& palette, bool is_enabled, bool is_checked, bool is_being_pressed)
{