Alan Malloy <a...@malloys.org> writes:
Hi Alan,
> I want to typehint the return value of f, so I put metadata on the
> form representing a call to it. But if a macro gets involved, there's
> an "intervening" form that ignores its metadata and returns a new list
> of '(f 10) with no metadata. Thus the compiler has no idea I ever
> wanted to give it a hint about the type.
I'm facing the same issue. I have this macro for java interop:
--8<---------------cut here---------------start------------->8---
(defmacro with-traversal-context
[[g tc] & body]
`(let [old-tc# (.getTraversalContext ^Graph ~g)]
(try
(.setTraversalContext ^Graph ~g ^TraversalContext ~tc)
~@body
(finally (.setTraversalContext ^Graph ~g ^TraversalContext old-tc#)))))
--8<---------------cut here---------------end--------------->8---
But the type hints are gone in the macro expansion, thus I have 3
reflection warnings per macro application, and real, performance
critical reflection warnings get lost in the shuffle.
Is there a way to suppress reflection warnings only in a given scope,
i.e., something like a `do' in whose body no reflection warnings are
issued?
Bye,
Tassilo
--
(What the world needs (I think) is not
(a Lisp (with fewer parentheses))
but (an English (with more.)))
Brian Hayes, http://tinyurl.com/3y9l2kf
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