Comment on Lisp implemented in Rust macrosparentComments−throwup2381yWouldn’t that match “(foo - bar)” as well as “(foo-bar)”? I don’t think you can get around token whitespace in macro_rules−quasigloamOP1yYes it would match both, this would require us to assume that "foo - bar" can only be an atom. It's not a great solution.−celeritascelery1yIt would, but lisp has prefix operators, so you wouldn’t have to worry about it getting confused.−quasigloamOP1yAlthough in a Lisp such as Scheme, you could pass around the negation operator in something like (map - '(1 2 3)), so it would be a valid concern that it might clash.−tmtvl1yThe problem with that is that there are spaces between map, -, and '(1 2 3). The only way to get spaces into a name is by using vertical bars: (defvar |do i 10| 1.100)
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Wouldn’t that match “(foo - bar)” as well as “(foo-bar)”? I don’t think you can get around token whitespace in macro_rules
Yes it would match both, this would require us to assume that "foo - bar" can only be an atom. It's not a great solution.
It would, but lisp has prefix operators, so you wouldn’t have to worry about it getting confused.
Although in a Lisp such as Scheme, you could pass around the negation operator in something like (map - '(1 2 3)), so it would be a valid concern that it might clash.
The problem with that is that there are spaces between map, -, and '(1 2 3). The only way to get spaces into a name is by using vertical bars: