[vala] Support postfix operator on array members

[Jürg Billeter <juergbi src gnome org>]

commit 99ec168d1042c9baa38819805edaadfda2646cd2
Author: Jürg Billeter <j bitron ch>
Date:   Tue Sep 29 22:19:18 2009 +0200

    Support postfix operator on array members
    
    Fixes bug 596637.

 tests/Makefile.am                |    1 +
 tests/basic-types/bug596637.vala |    5 +++++
 vala/valapostfixexpression.vala  |    9 ++++++++-
 3 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index f1058b8..821b4a2 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -20,6 +20,7 @@ TESTS = \
 	basic-types/strings.vala \
 	basic-types/arrays.vala \
 	basic-types/pointers.vala \
+	basic-types/bug596637.vala \
 	namespaces.vala \
 	methods/lambda.vala \
 	methods/closures.vala \
diff --git a/tests/basic-types/bug596637.vala b/tests/basic-types/bug596637.vala
new file mode 100644
index 0000000..904de17
--- /dev/null
+++ b/tests/basic-types/bug596637.vala
@@ -0,0 +1,5 @@
+void main () {
+	int[] a = new int[1];
+	a[0]++;
+	assert (a[0] == 1);
+}
diff --git a/vala/valapostfixexpression.vala b/vala/valapostfixexpression.vala
index 1ed72e1..b9d6af1 100644
--- a/vala/valapostfixexpression.vala
+++ b/vala/valapostfixexpression.vala
@@ -74,7 +74,7 @@ public class Vala.PostfixExpression : Expression {
 			return false;
 		}
 
-		if (inner.value_type == null) {
+		if (!(inner.value_type is IntegerType) && !(inner.value_type is FloatingType) && !(inner.value_type is PointerType)) {
 			error = true;
 			Report.error (source_reference, "unsupported lvalue in postfix expression");
 			return false;
@@ -94,6 +94,13 @@ public class Vala.PostfixExpression : Expression {
 				/* if no symbol found, skip this check */
 				return false;
 			}
+		} else if (inner is ElementAccess) {
+			var ea = (ElementAccess) inner;
+			if (!(ea.container.value_type is ArrayType)) {
+				error = true;
+				Report.error (source_reference, "unsupported lvalue in postfix expression");
+				return false;
+			}
 		} else {
 			error = true;
 			Report.error (source_reference, "unsupported lvalue in postfix expression");