[vala/staging] vala: Add dedicated CastExpression.silent() constructor

[Rico Tzschichholz <ricotz src gnome org>]

commit ccf5fd33bedb50cd05cceab146a08fbcd511a603
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Dec 14 17:25:10 2017 +0100

    vala: Add dedicated CastExpression.silent() constructor

 vala/valacastexpression.vala |   17 +++++++++++++----
 vala/valagenieparser.vala    |    4 ++--
 vala/valaparser.vala         |    8 ++++----
 3 files changed, 19 insertions(+), 10 deletions(-)
---
diff --git a/vala/valacastexpression.vala b/vala/valacastexpression.vala
index f9e3d30..ecf093d 100644
--- a/vala/valacastexpression.vala
+++ b/vala/valacastexpression.vala
@@ -52,9 +52,9 @@ public class Vala.CastExpression : Expression {
        /**
         * Checked casts return NULL instead of raising an error.
         */
-       public bool is_silent_cast { get; set; }
+       public bool is_silent_cast { get; private set; }
 
-       public bool is_non_null_cast { get; set; }
+       public bool is_non_null_cast { get; private set; }
 
        private Expression _inner;
 
@@ -67,10 +67,19 @@ public class Vala.CastExpression : Expression {
         * @param type_reference  target type
         * @return                newly created cast expression
         */
-       public CastExpression (Expression inner, DataType type_reference, SourceReference source_reference, 
bool is_silent_cast) {
+       public CastExpression (Expression inner, DataType type_reference, SourceReference source_reference) {
                this.type_reference = type_reference;
                this.source_reference = source_reference;
-               this.is_silent_cast = is_silent_cast;
+               this.is_silent_cast = false;
+               this.is_non_null_cast = false;
+               this.inner = inner;
+       }
+
+       public CastExpression.silent (Expression inner, DataType type_reference, SourceReference 
source_reference) {
+               this.type_reference = type_reference;
+               this.source_reference = source_reference;
+               this.is_silent_cast = true;
+               this.is_non_null_cast = false;
                this.inner = inner;
        }
 
diff --git a/vala/valagenieparser.vala b/vala/valagenieparser.vala
index f9aba46..8c92e95 100644
--- a/vala/valagenieparser.vala
+++ b/vala/valagenieparser.vala
@@ -1277,7 +1277,7 @@ public class Vala.Genie.Parser : CodeVisitor {
                                        case TokenType.PARAMS:
                                        case TokenType.YIELD:
                                                var inner = parse_unary_expression ();
-                                               return new CastExpression (inner, type, get_src (begin), 
false);
+                                               return new CastExpression (inner, type, get_src (begin));
                                        default:
                                                break;
                                        }
@@ -1450,7 +1450,7 @@ public class Vala.Genie.Parser : CodeVisitor {
                                case TokenType.AS:
                                        next ();
                                        var type = parse_type (true, false);
-                                       left = new CastExpression (left, type, get_src (begin), true);
+                                       left = new CastExpression.silent (left, type, get_src (begin));
                                        break;
                                default:
                                        found = false;
diff --git a/vala/valaparser.vala b/vala/valaparser.vala
index 6228ba9..2423e22 100644
--- a/vala/valaparser.vala
+++ b/vala/valaparser.vala
@@ -1112,17 +1112,17 @@ public class Vala.Parser : CodeVisitor {
                                                case TokenType.IDENTIFIER:
                                                case TokenType.PARAMS:
                                                        var inner = parse_unary_expression ();
-                                                       return new CastExpression (inner, type, get_src 
(begin), false);
+                                                       return new CastExpression (inner, type, get_src 
(begin));
                                                case TokenType.STAR:
                                                        next ();
                                                        var op = parse_unary_expression ();
                                                        var inner = new PointerIndirection (op, get_src 
(begin));
-                                                       return new CastExpression (inner, type, get_src 
(begin), false);
+                                                       return new CastExpression (inner, type, get_src 
(begin));
                                                case TokenType.BITWISE_AND:
                                                        next ();
                                                        var op = parse_unary_expression ();
                                                        var inner = new AddressofExpression (op, get_src 
(begin));
-                                                       return new CastExpression (inner, type, get_src 
(begin), false);
+                                                       return new CastExpression (inner, type, get_src 
(begin));
                                                default:
                                                        break;
                                                }
@@ -1299,7 +1299,7 @@ public class Vala.Parser : CodeVisitor {
                                case TokenType.AS:
                                        next ();
                                        var type = parse_type (true, false);
-                                       left = new CastExpression (left, type, get_src (begin), true);
+                                       left = new CastExpression.silent (left, type, get_src (begin));
                                        break;
                                default:
                                        found = false;