Do not bind *
Closed this issue · 2 comments
m2ym commented
WHEN derivied pattern implicitly bind * to the value. This introduce dynamic binding, so there is performance issue.
fare commented
And of course it's not a compliant thing to symbol-macrolet *.
That's why for fare-matcher, * was the "match anything and ignore" symbol, much like * in deftype patterns.
You could use "it" instead of * — either as an exported symbol (which might clash with anaphora if you don't import it), or magically in package which is ugly. Or just require explicit binding of symbol, as in fare-matcher.