Reverting conclusion of #1001 -- Throw should be able to be used as part of an expression.

lib/coffee-script/grammar.js

@@ -30,11 +30,11 @@
     ],
     Line: [o('Expression'), o('Statement')],
     Statement: [
-      o('Return'), o('Throw'), o('Comment'), o('STATEMENT', function() {
+      o('Return'), o('Comment'), o('STATEMENT', function() {
         return new Literal($1);
       })
     ],
-    Expression: [o('Value'), o('Invocation'), o('Code'), o('Operation'), o('Assign'), o('If'), o('Try'), o('While'), o('For'), o('Switch'), o('Class')],
+    Expression: [o('Value'), o('Invocation'), o('Code'), o('Operation'), o('Assign'), o('If'), o('Try'), o('While'), o('For'), o('Switch'), o('Class'), o('Throw')],
     Block: [
       o('INDENT OUTDENT', function() {
         return new Block;

src/grammar.coffee

@@ -77,7 +77,6 @@ grammar =
   # Pure statements which cannot be expressions.
   Statement: [
     o 'Return'
-    o 'Throw'
     o 'Comment'
     o 'STATEMENT',                              -> new Literal $1
   ]
@@ -98,6 +97,7 @@ grammar =
     o 'For'
     o 'Switch'
     o 'Class'
+    o 'Throw'
   ]
 
   # An indented block of expressions. Note that the [Rewriter](rewriter.html)