[vala] codegen: Support constant unary expressions in field initializers

[Luca Bruno <lucabru src gnome org>]

commit 50222da1622de0039fc812624253f85f474d80d4
Author: Luca Bruno <lucabru src gnome org>
Date:   Fri Dec 12 16:06:38 2014 +0100

    codegen: Support constant unary expressions in field initializers

 codegen/valaccodebasemodule.vala |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 1bee9e5..8d6ebdd 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -1342,6 +1342,16 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                } else if (cexpr is CCodeCastExpression) {
                        var ccast = (CCodeCastExpression) cexpr;
                        return is_constant_ccode_expression (ccast.inner);
+               } else if (cexpr is CCodeUnaryExpression) {
+                       var cunary = (CCodeUnaryExpression) cexpr;
+                       switch (cunary.operator) {
+                               case CCodeUnaryOperator.PREFIX_INCREMENT:
+                               case CCodeUnaryOperator.PREFIX_DECREMENT:
+                               case CCodeUnaryOperator.POSTFIX_INCREMENT:
+                               case CCodeUnaryOperator.POSTFIX_DECREMENT:
+                                       return false;
+                       }
+                       return is_constant_ccode_expression (cunary.inner);
                } else if (cexpr is CCodeBinaryExpression) {
                        var cbinary = (CCodeBinaryExpression) cexpr;
                        return is_constant_ccode_expression (cbinary.left) && is_constant_ccode_expression 
(cbinary.right);