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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/LibGUI/CheckBox.cpp
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@ -15,9 +15,9 @@ REGISTER_WIDGET(GUI, CheckBox)
namespace GUI {
static const int s_box_width = 13;
static const int s_box_height = 13;
static const int s_horizontal_padding = 6;
static constexpr int s_box_width = 13;
static constexpr int s_box_height = 13;
static constexpr int s_horizontal_padding = 6;
CheckBox::CheckBox(String text)
: AbstractButton(move(text))