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2 points
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parenthesis
6128 days ago |
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Another possibility would be a solitary & (echoing, as mentioned, &optional in CL).
1 point
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AndyBoySouthPas
6126 days ago |
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In CL I use named keyword arguments much more than optional ones, so I would want to keep single character prefix for keywords. This leads to a possibility: (&& x) would signify optional, (& x) would signify keyword.
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