Revert "Merge pull request #2702 from alexrp/master"

<~ is already a valid expression in Elixir.

This reverts commit 2c741ec, reversing
changes made to 12a4578.

Author: José Valim

lib/elixir/lib/macro.ex

@@ -17,7 +17,6 @@ defmodule Macro do
     :<, :>, :->,
     :+, :-, :*, :/, :=, :|, :.,
     :and, :or, :when, :in,
-    :~>>, :~>, :<~, :<~>, :|~>, :<|>,
     :<<<, :>>>, :|||, :&&&, :^^^, :~~~]
 
   @doc false
@@ -40,8 +39,7 @@ defmodule Macro do
       o when o in [:&&, :&&&, :and]           -> {:left, 140}
       o when o in [:==, :!=, :=~, :===, :!==] -> {:left, 150}
       o when o in [:<, :<=, :>=, :>]          -> {:left, 160}
-      o when o in [:|>, :<<<, :>>>, :~>>, :~>,
-                   :<~, :<~>, :|~>, :<|>]     -> {:left, 170}
+      o when o in [:|>, :<<<, :>>>]           -> {:left, 170}
       :in                                     -> {:left, 180}
       o when o in [:++, :--, :.., :<>]        -> {:right, 200}
       o when o in [:+, :-]                    -> {:left, 210}

lib/elixir/src/elixir_parser.yrl

@@ -59,7 +59,6 @@ Left     140 and_op_eol.      %% &&, &&&, and
 Left     150 comp_op_eol.     %% ==, !=, =~, ===, !==
 Left     160 rel_op_eol.      %% <, >, <=, >=
 Left     170 arrow_op_eol.    %% < (op), (op) > (e.g |>, <<<, >>>)
-                              %% ~>>, ~>, <~, <~>, |~>, <|>
 Left     180 in_op_eol.       %% in
 Right    200 two_op_eol.      %% ++, --, .., <>
 Left     210 add_op_eol.      %% + (op), - (op)

lib/elixir/src/elixir_tokenizer.erl

@@ -33,16 +33,10 @@
 
 -define(arrow_op3(T1, T2, T3),
   T1 == $<, T2 == $<, T3 == $<;
-  T1 == $>, T2 == $>, T3 == $>;
-  T1 == $~, T2 == $>, T3 == $>;
-  T1 == $<, T2 == $~, T3 == $>;
-  T1 == $|, T2 == $~, T3 == $>;
-  T1 == $<, T2 == $|, T3 == $>).
+  T1 == $>, T2 == $>, T3 == $>).
 
 -define(arrow_op(T1, T2),
-  T1 == $|, T2 == $>;
-  T1 == $~, T2 == $>;
-  T1 == $<, T2 == $~).
+  T1 == $|, T2 == $>).
 
 -define(rel_op(T),
   T == $<;