From 1af3517f2b664bb8f4d5b5fb066649492dc5e27e Mon Sep 17 00:00:00 2001
From: Christian Bauer <Christian.Bauer@uni-mainz.de>
Date: Thu, 14 Oct 2004 19:36:45 +0000
Subject: [PATCH] added error handling to op()/let_op()

---
 ginac/integral.cpp | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/ginac/integral.cpp b/ginac/integral.cpp
index 467cf290..d2815c36 100644
--- a/ginac/integral.cpp
+++ b/ginac/integral.cpp
@@ -319,30 +319,34 @@ ex integral::op(size_t i) const
 {
 	GINAC_ASSERT(i<4);
 
-	switch(i) {
-		case(0):
+	switch (i) {
+		case 0:
 			return x;
-		case(1):
+		case 1:
 			return a;
-		case(2):
+		case 2:
 			return b;
-		case(3):
+		case 3:
 			return f;
+		default:
+			throw (std::out_of_range("integral::op() out of range"));
 	}
 }
 
 ex & integral::let_op(size_t i)
 {
 	ensure_if_modifiable();
-	switch(i) {
-		case(0):
+	switch (i) {
+		case 0:
 			return x;
-		case(1):
+		case 1:
 			return a;
-		case(2):
+		case 2:
 			return b;
-		case(3):
+		case 3:
 			return f;
+		default:
+			throw (std::out_of_range("integral::let_op() out of range"));
 	}
 }
 
@@ -390,7 +394,8 @@ ex integral::expand(unsigned options) const
 }
 
 ex integral::derivative(const symbol & s) const
-{	if (s==x)
+{
+	if (s==x)
 		throw(logic_error("differentiation with respect to dummy variable"));
 	return b.diff(s)*f.subs(x==b)-a.diff(s)*f.subs(x==a)+integral(x, a, b, f.diff(s));
 }
-- 
2.44.0