InsertParenthesesVisitor: Add parentheses to PrimitiveExpression if its value is a negative int/long. -1.ToString() is interpreted as -(1.ToString()) by the parser. We need parentheses in order to fix this.

1 files changed, 7 insertions, 0 deletions

diff --git a/ICSharpCode.NRefactory.CSharp/OutputVisitor/InsertParenthesesVisitor.cs b/ICSharpCode.NRefactory.CSharp/OutputVisitor/InsertParenthesesVisitor.cs
index 4528a5f9..475ca40b 100644
--- a/ICSharpCode.NRefactory.CSharp/OutputVisitor/InsertParenthesesVisitor.cs
+++ b/ICSharpCode.NRefactory.CSharp/OutputVisitor/InsertParenthesesVisitor.cs
@@ -63,6 +63,13 @@ namespace ICSharpCode.NRefactory.CSharp
 			}
 			if (expr is CastExpression)
 				return Unary;
+			if (expr is PrimitiveExpression) {
+				var value = ((PrimitiveExpression)expr).Value;
+				if (value is int && (int)value < 0)
+					return Unary;
+				if (value is long && (long)value < 0)
+					return Unary;
+			}
 			BinaryOperatorExpression boe = expr as BinaryOperatorExpression;
 			if (boe != null) {
 				switch (boe.Operator) {