From: Christophe Rhodes <csr21@cantab.net>
Date: Fri, 3 Sep 2010 07:10:09 +0000 (+0100)
Subject: alternative printing for the REPL
X-Git-Url: http://christophe.rhodes.io/gitweb/?p=swankr.git;a=commitdiff_plain;h=f3a32de1015eb3008fbdd254e72927f50819c029

alternative printing for the REPL

instead of using print(), use str().  Also, be even more cautious
about cleaning up in printToString; previously, errors in printing
would lead to a sink to a closed fifo...

Printing is still not really right, and I forsee that we will end up
writing our own printer to get something more lispy.  But at least
this approach tends not to dump huge tables into the REPL.
---

diff --git a/swank.R b/swank.R
index 99f508b..0a309ef 100644
--- a/swank.R
+++ b/swank.R
@@ -247,7 +247,11 @@ writeSexpToString <- function(obj) {
 
 printToString <- function(val) {
   f <- fifo("")
-  tryCatch({ sink(f); print(val); sink(); readLines(f) },
+  sink(f)
+  tryCatch({
+    tryCatch(str(val, indent.str="", list.len=5, max.level=2),
+             finally=sink())
+    readLines(f) },
            finally=close(f))
 }