Right now I ca't figure why the fn case is working but the anonyous Var is
failing because the vars are specially handled:
else if(value instanceof Var)
{
Var var = (Var) value;
gen.push(var.ns.name.toString());
gen.push(var.sym.toString());
gen.invokeStatic(RT_TYPE, Method.getMethod("clojure.lang.Var
var(String,String)"));
}
Christophe
On Thu, Aug 8, 2013 at 4:44 PM, Jamie Brandon
<[email protected]>wrote:
> What if it isn't inside a constant?
>
> user=> (eval `(fn [] ~#'x))
> #<user$eval1366$fn__1367 user$eval1366$fn__1367@15dbb76>
>
> user=> (with-local-vars [x nil] (eval `(fn [] ~x)))
> CompilerException java.lang.NullPointerException,
> compiling:(NO_SOURCE_PATH:1:1)
>
> How about functions? These are unreadable but they still eval
> correctly inside constants.
>
> user=> (letfn [(x [] nil)] (eval x))
> #<user$eval1377$x__1378 user$eval1377$x__1378@5fea6729>
>
> user=> (letfn [(x [] nil)] (eval [x]))
> [#<user$eval1381$x__1382 user$eval1381$x__1382@e3b7c27>]
>
> user=> (read-string "#<user$x user$x@1981e4d>")
> RuntimeException Unreadable form clojure.lang.Util.runtimeException
> (Util.java:219)
>
> user=> (defn x [] nil)
> #'user/x
>
> user=> (eval x)
> #<user$x user$x@14ff1714>
>
> user=> (eval [x])
> [#<user$x user$x@5892d4a8>]
>
> user=> (read-string "#<user$eval1381$x__1382 user$eval1381$x__1382@e3b7c27
> >")
> RuntimeException Unreadable form clojure.lang.Util.runtimeException
> (Util.java:219)
>
> On 8 August 2013 14:58, Christophe Grand <[email protected]> wrote:
> > The error is caused by the fact that eval sees the var as a constant (or
> > part of) and tries to serialize the constant.
> > #<Var: --unnamed--> is unreadable while #'user/x is that explains teh
> > difference in behaviour.
> >
> >
> > On Thu, Aug 8, 2013 at 3:40 PM, Jamie Brandon <
> [email protected]>
> > wrote:
> >>
> >> This has me stumped:
> >>
> >> user=> (with-local-vars [x nil] (eval x))
> >> #<Var: --unnamed-->
> >> user=> (with-local-vars [x nil] (eval [x]))
> >> CompilerException java.lang.NullPointerException,
> >> compiling:(NO_SOURCE_PATH:1:1)
> >>
> >> By comparison:
> >>
> >> user=> (def x nil)
> >> #'user/x
> >> user=> (eval #'x)
> >> #'user/x
> >> user=> (eval [#'x])
> >> [#'user/x]
> >>
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> >
> >
> >
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