make the AST go from left to right, rather than right to left

actionpack/lib/action_dispatch/journey/parser.rb

 #
 # DO NOT MODIFY!!!!
-# This file is automatically generated by Racc 1.4.9
-# from Racc grammar file "".
+# This file is automatically generated by Racc 1.4.11
+# from Racc grammer file "".
 #
 
 require 'racc/parser.rb'
@@ -9,42 +9,38 @@
 
 require 'action_dispatch/journey/parser_extras'
 module ActionDispatch
-  module Journey # :nodoc:
-    class Parser < Racc::Parser # :nodoc:
+  module Journey
+    class Parser < Racc::Parser
 ##### State transition tables begin ###
 
 racc_action_table = [
-    17,    21,    13,    15,    14,     7,   nil,    16,     8,    19,
-    13,    15,    14,     7,    23,    16,     8,    19,    13,    15,
-    14,     7,   nil,    16,     8,    13,    15,    14,     7,   nil,
-    16,     8,    13,    15,    14,     7,   nil,    16,     8 ]
+    13,    15,    14,     7,    21,    16,     8,    19,    13,    15,
+    14,     7,    17,    16,     8,    13,    15,    14,     7,    24,
+    16,     8,    13,    15,    14,     7,    19,    16,     8 ]
 
 racc_action_check = [
-     1,    17,     1,     1,     1,     1,   nil,     1,     1,     1,
-    20,    20,    20,    20,    20,    20,    20,    20,     7,     7,
-     7,     7,   nil,     7,     7,    19,    19,    19,    19,   nil,
-    19,    19,     0,     0,     0,     0,   nil,     0,     0 ]
+     2,     2,     2,     2,    17,     2,     2,     2,     0,     0,
+     0,     0,     1,     0,     0,    19,    19,    19,    19,    20,
+    19,    19,     7,     7,     7,     7,    22,     7,     7 ]
 
 racc_action_pointer = [
-    30,     0,   nil,   nil,   nil,   nil,   nil,    16,   nil,   nil,
-   nil,   nil,   nil,   nil,   nil,   nil,   nil,     1,   nil,    23,
-     8,   nil,   nil,   nil ]
+     6,    12,    -2,   nil,   nil,   nil,   nil,    20,   nil,   nil,
+   nil,   nil,   nil,   nil,   nil,   nil,   nil,     4,   nil,    13,
+    13,   nil,    17,   nil,   nil ]
 
 racc_action_default = [
-   -18,   -18,    -2,    -3,    -4,    -5,    -6,   -18,    -9,   -10,
-   -11,   -12,   -13,   -14,   -15,   -16,   -17,   -18,    -1,   -18,
-   -18,    24,    -8,    -7 ]
+   -19,   -19,    -2,    -3,    -4,    -5,    -6,   -19,   -10,   -11,
+   -12,   -13,   -14,   -15,   -16,   -17,   -18,   -19,    -1,   -19,
+   -19,    25,    -8,    -9,    -7 ]
 
 racc_goto_table = [
-    18,     1,   nil,   nil,   nil,   nil,   nil,   nil,    20,   nil,
-   nil,   nil,   nil,   nil,   nil,   nil,   nil,   nil,    22,    18 ]
+     1,    22,    18,    23,   nil,   nil,   nil,    20 ]
 
 racc_goto_check = [
-     2,     1,   nil,   nil,   nil,   nil,   nil,   nil,     1,   nil,
-   nil,   nil,   nil,   nil,   nil,   nil,   nil,   nil,     2,     2 ]
+     1,     2,     1,     3,   nil,   nil,   nil,     1 ]
 
 racc_goto_pointer = [
-   nil,     1,    -1,   nil,   nil,   nil,   nil,   nil,   nil,   nil,
+   nil,     0,   -18,   -16,   nil,   nil,   nil,   nil,   nil,   nil,
    nil ]
 
 racc_goto_default = [
@@ -61,19 +57,20 @@ class Parser < Racc::Parser # :nodoc:
   1, 12, :_reduce_none,
   3, 15, :_reduce_7,
   3, 13, :_reduce_8,
-  1, 16, :_reduce_9,
+  3, 13, :_reduce_9,
+  1, 16, :_reduce_10,
   1, 14, :_reduce_none,
   1, 14, :_reduce_none,
   1, 14, :_reduce_none,
   1, 14, :_reduce_none,
-  1, 19, :_reduce_14,
-  1, 17, :_reduce_15,
-  1, 18, :_reduce_16,
-  1, 20, :_reduce_17 ]
+  1, 19, :_reduce_15,
+  1, 17, :_reduce_16,
+  1, 18, :_reduce_17,
+  1, 20, :_reduce_18 ]
 
-racc_reduce_n = 18
+racc_reduce_n = 19
 
-racc_shift_n = 24
+racc_shift_n = 25
 
 racc_token_table = {
   false => 0,
@@ -137,12 +134,12 @@ class Parser < Racc::Parser # :nodoc:
 # reduce 0 omitted
 
 def _reduce_1(val, _values, result)
- result = Cat.new(val.first, val.last)
+ result = Cat.new(val.first, val.last) 
     result
 end
 
 def _reduce_2(val, _values, result)
- result = val.first
+ result = val.first 
     result
 end
 
@@ -155,21 +152,24 @@ def _reduce_2(val, _values, result)
 # reduce 6 omitted
 
 def _reduce_7(val, _values, result)
- result = Group.new(val[1])
+ result = Group.new(val[1]) 
     result
 end
 
 def _reduce_8(val, _values, result)
- result = Or.new([val.first, val.last])
+ result = Or.new([val.first, val.last]) 
     result
 end
 
 def _reduce_9(val, _values, result)
- result = Star.new(Symbol.new(val.last))
+ result = Or.new([val.first, val.last]) 
     result
 end
 
-# reduce 10 omitted
+def _reduce_10(val, _values, result)
+ result = Star.new(Symbol.new(val.last)) 
+    result
+end
 
 # reduce 11 omitted
 
@@ -177,23 +177,25 @@ def _reduce_9(val, _values, result)
 
 # reduce 13 omitted
 
-def _reduce_14(val, _values, result)
- result = Slash.new('/')
-    result
-end
+# reduce 14 omitted
 
 def _reduce_15(val, _values, result)
- result = Symbol.new(val.first)
+ result = Slash.new('/') 
     result
 end
 
 def _reduce_16(val, _values, result)
- result = Literal.new(val.first)
+ result = Symbol.new(val.first) 
     result
 end
 
 def _reduce_17(val, _values, result)
- result = Dot.new(val.first)
+ result = Literal.new(val.first) 
+    result
+end
+
+def _reduce_18(val, _values, result)
+ result = Dot.new(val.first) 
     result
 end
 

actionpack/lib/action_dispatch/journey/parser.y

@@ -4,7 +4,7 @@ token SLASH LITERAL SYMBOL LPAREN RPAREN DOT STAR OR
 
 rule
   expressions
-    : expressions expression  { result = Cat.new(val.first, val.last) }
+    : expression expressions  { result = Cat.new(val.first, val.last) }
     | expression              { result = val.first }
     | or
     ;
@@ -17,7 +17,8 @@ rule
     : LPAREN expressions RPAREN { result = Group.new(val[1]) }
     ;
   or
-    : expressions OR expression { result = Or.new([val.first, val.last]) }
+    : expression OR expression { result = Or.new([val.first, val.last]) }
+    | expression OR or { result = Or.new([val.first, val.last]) }
     ;
   star
     : STAR       { result = Star.new(Symbol.new(val.last)) }