From c74dac7e737713ada50d8cc384be9beaa695410a Mon Sep 17 00:00:00 2001
From: Houtan Bastani <houtan@dynare.org>
Date: Wed, 5 Apr 2017 11:07:34 +0200
Subject: [PATCH] preprocessor: add warning for potential non-linearities in
model declared linear. #1404
---
ModFile.cc | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/ModFile.cc b/ModFile.cc
index 5719d019..6d993d11 100644
--- a/ModFile.cc
+++ b/ModFile.cc
@@ -277,6 +277,19 @@ ModFile::checkPass(bool nostrict)
|| dynamic_model.isBinaryOpUsed(oDifferent)))
warnings << "WARNING: you are using a function (max, min, abs, sign) or an operator (<, >, <=, >=, ==, !=) which is unsuitable for a stochastic context; see the reference manual, section about \"Expressions\", for more details." << endl;
+ if (linear &&
+ (dynamic_model.isUnaryOpUsed(oSign)
+ || dynamic_model.isUnaryOpUsed(oAbs)
+ || dynamic_model.isBinaryOpUsed(oMax)
+ || dynamic_model.isBinaryOpUsed(oMin)
+ || dynamic_model.isBinaryOpUsed(oGreater)
+ || dynamic_model.isBinaryOpUsed(oLess)
+ || dynamic_model.isBinaryOpUsed(oGreaterEqual)
+ || dynamic_model.isBinaryOpUsed(oLessEqual)
+ || dynamic_model.isBinaryOpUsed(oEqualEqual)
+ || dynamic_model.isBinaryOpUsed(oDifferent)))
+ warnings << "WARNING: you have declared your model 'linear' but you are using a function (max, min, abs, sign) or an operator (<, >, <=, >=, ==, !=) which potentially makes it non-linear." << endl;
+
// Test if some estimated parameters are used within the values of shocks
// statements (see issue #469)
set<int> parameters_intersect;
--
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