additional syntactic sugar

- allow multiple names in infix, typesig, and dcon defs
- align fixities with Idris

tests/black/Oper.newt

@@ -11,10 +11,8 @@ module Oper
 -- long term, I might want TopContext in the parser, and parse a top-level
 -- declaration at a time (for incremental updates), but much longer term.
 
-infixl 4 _+_
-infixl 4 _-_
-infixl 5 _*_
-infixl 5 _/_
+infixl 8 _+_ _-_
+infixl 9 _*_ _/_
 
 ptype Int
 ptype String
@@ -33,7 +31,7 @@ _+_ x y = plus x y
 test : Int -> Int
 test x = 42 + x * 3 + 2
 
-infixr 2 _,_
+infixr 0 _,_
 data Pair : U -> U -> U where
   _,_ : {A B : U} -> A -> B -> Pair A B
 

tests/black/Prelude.newt

@@ -18,7 +18,7 @@ data List : U -> U where
 
 -- Currently if I say _::_ = Cons, it gets curried
 
-infixr 4 _::_
+infixr 7 _::_
 _::_ : {a : U} -> a -> List a -> List a
 _::_ x xs = Cons x xs