Difference between c and C when keymapping using SHIFT control modifier

[MartyMcFlyInTheSky]

What Operating System(s) are you running on?

Linux X11

Which Wayland compositor or X11 Window manager(s) are you using?

gnome

WezTerm version

wezterm 20240730-082727-56a27e93

Ask your question!

What is the difference between mapping:

{
        key = 'c',
        mods = 'CTRL|SHIFT',
        action = ...
}

and

{
        key = 'C',
        mods = 'CTRL|SHIFT',
        action = ...
}

in the wezterm config?

Since for this keystroke I need to press shift in any case which would make my 'C' uppercase, so how could I ever make use of the lowercase 'c' keybinding? Does it have any effect?

I'm confused because when reading wezterms default key assignements, there is an entry for CTRL + SHIFT + t (lowercase) and one for SUPER+SHIFT+T (uppercase). I would have thought that it's all the same, but apparently not.

[MartyMcFlyInTheSky]

push

[MartyMcFlyInTheSky]

push2

[neogeographica]

Someone else may know more definitively, but I don't think there is a difference.

Cf. the comment at

wezterm/wezterm-gui/src/inputmap.rs

Line 52 in 2d0c5cd

// If the user configures {key='p', mods='CTRL|SHIFT'} that gets

                // If the user configures {key='p', mods='CTRL|SHIFT'} that gets
                // normalized into {key='P', mods='CTRL'} in Config::key_bindings(),
                // and that value exists in `keys.default` when we reach this point.

[MartyMcFlyInTheSky]

Oh very insightful, thank you!