parser changes for "!"

com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/ParserGeneration.java

@@ -62,6 +62,7 @@ public class ParserGeneration {
         "support strings in field accesses",
         "allow NULL= in switch",
         "support NA_complex_",
-        "simplified unary and binary operations"
+        "simplified unary and binary operations",
+        "allow unary ! in normal expressions"
     };
 }

com.oracle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g

@@ -360,7 +360,7 @@ and_expr returns [ASTNode v]
     ;
 
 not_expr returns [ASTNode v]
-    : t=NOT n_ l=not_expr { $v = UnaryOperation.create(sourceSection("not_expr", $t, $l.stop), Operator.UNARY_NOT, $l.v); }
+    : {true}? t=NOT n_ l=not_expr { $v = UnaryOperation.create(sourceSection("not_expr", $t, $l.stop), Operator.UNARY_NOT, $l.v); }
     | b=comp_expr         { $v = $b.v; }
     ;
 
@@ -440,6 +440,9 @@ unary_expression returns [ASTNode v]
       ( (number) => num=number { ((Constant) num).addNegativeSign(); $v = num; }
       | l=unary_expression     { $v = UnaryOperation.create(sourceSection("unary_expression/MINUS", $m, $l.stop), Operator.UNARY_MINUS, $l.v); }
       )
+    | m=NOT n_ { plusOrMinus = true; }
+      ( l=unary_expression     { $v = UnaryOperation.create(sourceSection("unary_expression/UNARY_NOT", $m, $l.stop), Operator.UNARY_NOT, $l.v); }
+      )
     | b=power_expr             { $v = $b.v; }
     ;