Thanks Alex. I asked because I thought it might be part of stable API. Thanks for your tip on slime (I do use slime) also. I will wait for it to become part of stable api. Sunil.
On Sat, Dec 4, 2010 at 9:29 AM, Alex Osborne <a...@meshy.org> wrote: > Sunil S Nandihalli <sunil.nandiha...@gmail.com> writes: > > > I really like the &env. It has saved a lot of tedious work a couple of > > times .. but I have only found use for the keys of the map that gets > > passed like in the following example. > > > I don't understand what the val part of the map contains? I have > > failed at attempts to figuring it out.. Can somebody tell me what the > > val part contains and how one could use it? > > It contains a LocalBindings object which the compiler uses internally to > keep track of a local binding. Note that unlike the keys, the values of > &env are not a stable API, they're implementation details and may well > change. When he added &env I think Rich said he'd look at giving the > values of &env a proper API as part of the future Clojure in Clojure > compiler. > > But you can poke at them like this: > > (defmacro foo [] > (def lb (first (vals &env)))) > > (let [a (+ 1 3)] > (foo)) > > (.sym lb) > ;; a > > (.idx lb) > ;; 1 > > (.name lb) > ;; "a" > > (.isArg lb) > ;; false > > (.canBeCleared lb) > ;; true > > (.init lb) > ;; #<StaticMethodExpr > ;; clojure.lang.compiler$staticmethode...@1a9d267d> > > (.args (.init lb)) > ;; [#<ConstantExpr clojure.lang.compiler$constante...@51d2bb9f> > ;; #<ConstantExpr clojure.lang.compiler$constante...@621bedb0>] > > > If you're using Emacs + SLIME, the SLIME inspector is quite useful for > exploring unknown values. After evaling the first two forms above, put > the cursor over "lb" and press C-c I (note that's shift + i). You'll > get something like this: > > clojure.lang.compiler$localbind...@25de152f > -------------------- > Type: class clojure.lang.Compiler$LocalBinding > Value: clojure.lang.compiler$localbind...@25de152f > --- > Fields: > sym: a > tag: > init: clojure.lang.compiler$staticmethode...@1a9d267d > idx: 1 > name: a > isArg: false > clearPathRoot: clojure.lang.compiler$pathn...@1740d415 > canBeCleared: true > > You can then press enter on any of the field values or class names to > get more detail about them. > > -- > 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<clojure%2bunsubscr...@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 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
