#cast const to var

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karmic falcon
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src/lib/vexlib.zig:655:26: error: expected type '*lib.vexlib.String', found '*const lib.vexlib.String'
            const j = key.indexOf(str.charAt(i));

Is there a way I can cast a const to a var without declaring it as a seperate variable?

maiden sierra
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You can make your lib return a pointer of the right constness

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Just use anytype as the receiver param and then do some comptime stuff to figure out the return type

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Much better than doing @constCasts to get rid of the constness after the fact

tawdry cedar
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That's often caused by const key = ... instead of var key = ...

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If it's a proc param though, consider changing charAt to fn charAt(self: *const String, index: usize)

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Otherwise, yes, you'll need var copy = param; or whathaveyou. But it sounds odd to require a mutable string in order to know what char is at a particular index, so I'd probably change that anyway.