rustc: Make "ne" use traits

Author: pcwalton

src/libsyntax/ast_util.rs

@@ -110,7 +110,8 @@ pure fn binop_to_method_name(op: binop) -> Option<~str> {
       ge => return Some(~"ge"),
       gt => return Some(~"gt"),
       eq => return Some(~"eq"),
-      and | or | ne => return None
+      ne => return Some(~"ne"),
+      and | or => return None
     }
 }
 

src/rustc/middle/resolve.rs

@@ -4530,7 +4530,7 @@ struct Resolver {
                 self.add_fixed_trait_for_expr(expr.id,
                                               self.lang_items.ord_trait);
             }
-            expr_binary(eq, _, _) => {
+            expr_binary(eq, _, _) | expr_binary(ne, _, _) => {
                 self.add_fixed_trait_for_expr(expr.id,
                                               self.lang_items.eq_trait);
             }

src/rustc/middle/typeck/check.rs

@@ -1108,7 +1108,7 @@ fn check_expr_with_unifier(fcx: @fn_ctxt,
 
         // Hack: Unify the two sides if this is a relational operator.
         match op {
-            ast::eq | ast::lt | ast::le | ast::ne | ast::ge | ast::gt => {
+            ast::eq | ast::ne | ast::lt | ast::le | ast::ge | ast::gt => {
                 check_expr_with(fcx, rhs, lhs_t);
             }
             _ => {}