1 files changed, 47 insertions, 0 deletions
diff --git a/rba.tool.editor/src/rba/tool/editor/validation/validators/PlusOperatorValidator.xtend b/rba.tool.editor/src/rba/tool/editor/validation/validators/PlusOperatorValidator.xtend
new file mode 100644
index 0000000..b98e8f5
--- /dev/null
+++ b/rba.tool.editor/src/rba/tool/editor/validation/validators/PlusOperatorValidator.xtend
@@ -0,0 +1,47 @@
+package rba.tool.editor.validation.validators
+
+import org.eclipse.xtext.validation.Check
+import org.eclipse.xtext.validation.EValidatorRegistrar
+import rba.core.ComparisonOperator
+import rba.core.ExpressionType
+import rba.core.PlusOperator
+import rba.core.RBACorePackage
+import rba.tool.editor.messages.Messages
+import rba.tool.editor.validation.AbstractRBAModelValidator
+
+class PlusOperatorValidator extends AbstractRBAModelValidator {
+
+	private String PLUS_OPERAND_SIZE = Messages.PLUS_OPERAND_SIZE;
+
+	private String PLUS_OPERAND_TYPE = Messages.PLUS_OPERAND_TYPE;
+
+	private String PLUS_OPERAND_TYPE_NOT_OPERATOR = Messages.PLUS_OPERAND_TYPE_NOT_OPERATOR;
+
+	override register(EValidatorRegistrar registrar) {
+		// not needed for classes used as ComposedCheck
+	}
+
+	@Check(FAST)
+	def checkPlusOperatorFast(PlusOperator plusOperator) {
+		if (plusOperator.operand.size < 2) {
+			error(PLUS_OPERAND_SIZE, RBACorePackage.Literals.OPERATOR__OPERAND)
+			return;
+		}
+	}
+
+	@Check(NORMAL)
+	def checkPlusOperatorNormal(PlusOperator plusOperator) {
+		for (var i = 0; i < plusOperator.operand.size; i++) {
+			var operand = plusOperator.operand.get(i)
+			if (operand instanceof ComparisonOperator) {
+				error(PLUS_OPERAND_TYPE_NOT_OPERATOR, RBACorePackage.Literals.OPERATOR__OPERAND, i, null)
+				return;
+			}
+
+			if (operand.type != ExpressionType.VALUE) {
+				error(PLUS_OPERAND_TYPE, RBACorePackage.Literals.OPERATOR__OPERAND, i, null)
+				return;
+			}
+		}
+	}
+}