Updated the patch based on comments from rhickey.
New sample syntax is:
(binding [*read-eval* false] (read-string "#=(eval (def x 3))" ))
throws an Exception
Joshua
### Eclipse Workspace Patch 1.0
#P Clojure
Index: src/clj/clojure/core.clj
===================================================================
--- src/clj/clojure/core.clj (revision 1332)
+++ src/clj/clojure/core.clj (working copy)
@@ -4008,6 +4008,13 @@
Defaults to true")
+(add-doc *read-eval*
+ "When set to logical false, the EvalReader (#=(...)) is disabled in
the
+ read/load in the thread-local binding.
+ Example: (binding [*read-eval* false] (read-string \"#=(eval (def x
3))\"))
+
+ Defaults to true")
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; helper
files ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(alter-meta! (find-ns 'clojure.core) assoc :doc "Fundamental library
of the Clojure language")
(load "core_proxy")
Index: src/jvm/clojure/lang/RT.java
===================================================================
--- src/jvm/clojure/lang/RT.java (revision 1332)
+++ src/jvm/clojure/lang/RT.java (working copy)
@@ -178,6 +178,7 @@
new PrintWriter(new OutputStreamWriter(System.err,
UTF8), true));
final static Keyword TAG_KEY = Keyword.intern(null, "tag");
final static public Var AGENT = Var.intern(CLOJURE_NS, Symbol.create
("*agent*"), null);
+final static public Var READEVAL = Var.intern(CLOJURE_NS,
Symbol.create("*read-eval*"), T);
final static public Var MACRO_META = Var.intern(CLOJURE_NS,
Symbol.create("*macro-meta*"), null);
final static public Var MATH_CONTEXT = Var.intern(CLOJURE_NS,
Symbol.create("*math-context*"), null);
static Keyword LINE_KEY = Keyword.intern(null, "line");
Index: src/jvm/clojure/lang/LispReader.java
===================================================================
--- src/jvm/clojure/lang/LispReader.java (revision 1332)
+++ src/jvm/clojure/lang/LispReader.java (working copy)
@@ -903,6 +903,11 @@
public static class EvalReader extends AFn{
public Object invoke(Object reader, Object eq) throws Exception{
+ if (!((Boolean)RT.READEVAL.deref()))
+ {
+ throw new Exception("EvalReader not allowed when *read-eval*
is
false.");
+ }
+
PushbackReader r = (PushbackReader) reader;
Object o = read(r, true, null, true);
if(o instanceof Symbol)
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