# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1361481503 -3600
# Node ID f2afc234c311cf32621a7fcd0745e7d89a8b7be6
# Parent  0abf0d2ef16df5b867e0aab70747dd71d50a7415
Fixed the string representation for binary operators by introducing brackets
(and thus explicit precedence).

diff -r 0abf0d2ef16d -r f2afc234c311 compiler/ast.py
--- a/compiler/ast.py	Fri Nov 09 00:36:13 2012 +0100
+++ b/compiler/ast.py	Thu Feb 21 22:18:23 2013 +0100
@@ -133,7 +133,7 @@
         return "Add((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s + %s" % (self.left, self.right)
+        return "(%s + %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitAdd(self, *args)
@@ -156,7 +156,7 @@
         return "And(%r)" % (self.nodes,)
 
     def __str__(self):
-        return " and ".join(map(str, self.nodes))
+        return "(%s)" % " and ".join(map(str, self.nodes))
 
     def visit(self, visitor, *args):
         return visitor.visitAnd(self, *args)
@@ -386,7 +386,7 @@
         return "Bitand(%r)" % (self.nodes,)
 
     def __str__(self):
-        return " & ".join(map(str, self.nodes))
+        return "(%s)" % " & ".join(map(str, self.nodes))
 
     def visit(self, visitor, *args):
         return visitor.visitBitand(self, *args)
@@ -410,7 +410,7 @@
         return "Bitor(%r)" % (self.nodes,)
 
     def __str__(self):
-        return " | ".join(map(str, self.nodes))
+        return "(%s)" % " | ".join(map(str, self.nodes))
 
     def visit(self, visitor, *args):
         return visitor.visitBitor(self, *args)
@@ -434,7 +434,7 @@
         return "Bitxor(%r)" % (self.nodes,)
 
     def __str__(self):
-        return " ^ ".join(map(str, self.nodes))
+        return "(%s)" % " ^ ".join(map(str, self.nodes))
 
     def visit(self, visitor, *args):
         return visitor.visitBitxor(self, *args)
@@ -698,7 +698,7 @@
         return "Div((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s / %s" % (self.left, self.right)
+        return "(%s / %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitDiv(self, *args)
@@ -775,7 +775,7 @@
         return "FloorDiv((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s // %s" % (self.left, self.right)
+        return "(%s // %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitFloorDiv(self, *args)
@@ -1235,7 +1235,7 @@
         return "LeftShift((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s << %s" % (self.left, self.right)
+        return "(%s << %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitLeftShift(self, *args)
@@ -1364,7 +1364,7 @@
         return "Mod((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s %% %s" % (self.left, self.right)
+        return "(%s %% %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitMod(self, *args)
@@ -1413,7 +1413,7 @@
         return "Mul((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s * %s" % (self.left, self.right)
+        return "(%s * %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitMul(self, *args)
@@ -1485,7 +1485,7 @@
         return "Or(%r)" % (self.nodes,)
 
     def __str__(self):
-        return " or ".join(map(str, self.nodes))
+        return "(%s)" % " or ".join(map(str, self.nodes))
 
     def visit(self, visitor, *args):
         return visitor.visitOr(self, *args)
@@ -1528,7 +1528,7 @@
         return "Power((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s ** %s" % (self.left, self.right)
+        return "(%s ** %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitPower(self, *args)
@@ -1669,7 +1669,7 @@
         return "RightShift((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s >> %s" % (self.left, self.right)
+        return "(%s >> %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitRightShift(self, *args)
@@ -1777,7 +1777,7 @@
         return "Sub((%r, %r))" % (self.left, self.right)
 
     def __str__(self):
-        return "%s - %s" % (self.left, self.right)
+        return "(%s - %s)" % (self.left, self.right)
 
     def visit(self, visitor, *args):
         return visitor.visitSub(self, *args)