Tell regionck that user unops are by value

Jorge Aparicio · Jorge Aparicio · commit 5caebb23cd3b · 2014-12-18T14:56:00.000-05:00
diff --git a/src/librustc_typeck/check/regionck.rs b/src/librustc_typeck/check/regionck.rs
@@ -682,10 +682,12 @@ fn visit_expr(rcx: &mut Rcx, expr: &ast::Expr) {
             visit::walk_expr(rcx, expr);
         }
 
-        ast::ExprUnary(_, ref lhs) if has_method_map => {
+        ast::ExprUnary(op, ref lhs) if has_method_map => {
+            let implicitly_ref_args = !ast_util::is_by_value_unop(op);
+
             // As above.
             constrain_call(rcx, expr, Some(&**lhs),
-                           None::<ast::Expr>.iter(), true);
+                           None::<ast::Expr>.iter(), implicitly_ref_args);
 
             visit::walk_expr(rcx, expr);
         }

Original file line number	Diff line number	Diff line change
`@@ -682,10 +682,12 @@ fn visit_expr(rcx: &mut Rcx, expr: &ast::Expr) {`
`682`	`682`	`visit::walk_expr(rcx, expr);`
`683`	`683`	`}`
`684`	`684`
`685`		`- ast::ExprUnary(_, ref lhs) if has_method_map => {`
	`685`	`+ ast::ExprUnary(op, ref lhs) if has_method_map => {`
	`686`	`+ let implicitly_ref_args = !ast_util::is_by_value_unop(op);`
	`687`	`+`
`686`	`688`	`// As above.`
`687`	`689`	`constrain_call(rcx, expr, Some(&**lhs),`
`688`		`- None::<ast::Expr>.iter(), true);`
	`690`	`+ None::<ast::Expr>.iter(), implicitly_ref_args);`
`689`	`691`
`690`	`692`	`visit::walk_expr(rcx, expr);`
`691`	`693`	`}`