Re: For socket repl: request redirectable *err* var

[Stephen C. Gilardi]

It's either attached to this message or uploaded to the group as: redirectable-stderr.patch Thanks, --Steve

redirectable-err.patch
Description: Binary data

On Oct 6, 2008, at 8:42 PM, Rich Hickey wrote: On Oct 6, 8:37 pm, "Stephen C. Gilardi" <[EMAIL PROTECTED]> wrote: Rich, Would you accept a patch to implement this? Sure - thanks. Rich On Sep 30, 2008, at 12:25 AM, Craig McDaniel wrote: Yes, I'd like to see *err* added too. I did my own *err* for a custom REPL and was surprised it wasn't already part of the environment just like *out*. On Sep 29, 9:24 am, Thorsen Eric <[EMAIL PROTECTED]> wrote: I would love to see this change as well. Eric On Sep 28, 2008, at 1:28 PM, Stephen C. Gilardi wrote: For a socket repl, I'd like to have error output sent across the wire as well as normal output. Clojure currently provides vars (*in* and *out*) that allow a thread to redirect input and output. I suggest a new var *err* which allows redirecting error output as well. I can mostly do this without a change to Clojure by using my own alternative to Repl.java, but there are several instances in Clojure where System.err is accessed directly. If those were made indirect through a new *err*, one could reliably redirect all of *in*, *out*, and *err*. Here's the *err* definition I suggest for RT.java: final static public Var ERR =           Var.intern(CLOJURE_NS, Symbol.create("*err*"),                      new PrintWriter(new OutputStreamWriter(System.err, UTF8), true)); (A PrintWriter with auto-flush.) I think PrintWriter is a good choice because Throwable offers a method to dump stack traces to a PrintWriter. --Steve