Gauche > Archives > 2016/10/16

matchマクロでベクタとunquoteを組み合わせるとシンタックスエラーになります。

 $ rlwrap ./gosh -ftest
 gosh> (use util.match)
 gosh> (match '#(1 2 3) (`#(,a ,b ,c) (values a b c)))
 *** ERROR: syntax error in pattern (quasiquote #((unquote a) (unquote b) (unquote c)))
     While compiling "(standard input)" at line 1: (match '#(1 2 3) (`#(,a ,b ,c) (values a b c)))
 Stack Trace:
 _______________________________________
   0  (eval expr env)
         at "../lib/gauche/interactive.scm":282
 gosh> (match '#() (#() 3))
 3
 gosh> (match '#() (`#() 3))
 *** ERROR: pair required, but got ()
     While compiling "(standard input)" at line 1: (match '#() (`#() 3))
 Stack Trace:
 _______________________________________
   0  (eval expr env)
         at "../lib/gauche/interactive.scm":282
 gosh>