The current testsuite says that in sweet-expressions the following should mean
"(foo (a b) . c)":
foo
! a b
! .
! c
SHOULD it mean that? My ANTLR BNF doesn't do that, it just treats lone "." as
a period, but we *did* support that previously.
It also has said that lone abbreviation on a line, followed by an indent,
applies that abbreviation to the body. E.G., this would mean "(quote (aaa
bbb))":
'
! (aaa bbb)
Again, my ANTLR BNF doesn't do that, but we used to. This one is debatable,
since you can get the same effect with the word "quote" in Scheme (though that
reasoning doesn't apply to Common Lisp).
I've tweaked the ANTLR BNF so that initially-indented special comments are
consumed, with the following hspace consumed too, and then recurses back to the
t_expr production, like this:
| (FF | VT)+ EOL retry2=t_expr {$v=$retry2.v;}
| (initial_indent_no_bang | hspace+ )
(n_expr {$v = $n_expr.v;} /* indent processing disabled */
+ | scomment hspace* sretry=t_expr {$v=$sretry.v;}
| comment_eol retry3=t_expr {$v=$retry3.v;} )
| initial_indent_with_bang error
| EOF {generate_eof();} /* End of file */
This is so that initially-indented block comments don't quietly disable
sweet-expressions in the next line, like this:
#| Hello |#
foo bar
I think should be "(foo bar)" not "foo" then "bar".
Comments? Thoughts?
--- David A. Wheeler
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