PS. The relevant part of Compiler.java is the emitValue method of ObjExpr (or grep for readStringMethod -- I believe this is its only use in the compiler).
On 30 January 2013 23:59, Michał Marczyk <michal.marc...@gmail.com> wrote: > On 30 January 2013 23:32, Chas Emerick <c...@cemerick.com> wrote: >> On Jan 30, 2013, at 12:23 PM, Michael Fogus wrote: >> >>>> RuntimeException EvalReader not allowed when *read-eval* is false. >>> >>> The problem is that the second eval gets (<the actual + function> 1 2 >>> 3) which invokes the right pathway triggering the exception. You can >>> trigger the same exception by: >>> >>> (binding [*read-eval* false] (eval (list + 1 2 3))) >> >> Re-reading this, I'm clearly not grokking something here. Maybe I'm having >> a slow afternoon; send help. :-P >> >> This obviously ends up running through EvalReader — but why? How is >> LispReader ever involved at all? > > I believe the story goes like so: > > The eval call here compiles a list of a function object and three > numbers. The function object gets compiled to code which effectively > calls readString on "#=(clojure.core$_PLUS_. )". (It so happens that > print-dup knows how to handle functions; if it didn't, an exception > would be thrown during compilation with the message "Can't embed > object in code, maybe print-dup not defined: ...".) When the compiled > code is executed, readString gets called to reconstruct the function, > and since *read-eval* is false, this fails. > > +1 to setting *read-eval* to false by default, by the way. > > Cheers, > Michał > >> >> Thanks, >> >> - Chas >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with your >> first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
