[vala/staging: 4/6] vala: Avoid superfluous string copying

[Rico Tzschichholz <ricotz src gnome org>]

commit 6fd1e861f6de40e51cb0a28f2f8119c49183c7f4
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Oct 30 14:53:44 2016 +0100

    vala: Avoid superfluous string copying

 vala/valabinaryexpression.vala |    2 +-
 vala/valaunaryexpression.vala  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vala/valabinaryexpression.vala b/vala/valabinaryexpression.vala
index b081090..82e6053 100644
--- a/vala/valabinaryexpression.vala
+++ b/vala/valabinaryexpression.vala
@@ -99,7 +99,7 @@ public class Vala.BinaryExpression : Expression {
                }
        }
 
-       public string get_operator_string () {
+       private unowned string get_operator_string () {
                switch (_operator) {
                case BinaryOperator.PLUS: return "+";
                case BinaryOperator.MINUS: return "-";
diff --git a/vala/valaunaryexpression.vala b/vala/valaunaryexpression.vala
index dfc795c..95b0d4f 100644
--- a/vala/valaunaryexpression.vala
+++ b/vala/valaunaryexpression.vala
@@ -77,7 +77,7 @@ public class Vala.UnaryExpression : Expression {
                }
        }
 
-       private string get_operator_string () {
+       private unowned string get_operator_string () {
                switch (_operator) {
                case UnaryOperator.PLUS: return "+";
                case UnaryOperator.MINUS: return "-";