From 992ae20115c7cffc8a7de0995e1e32536e13a09a Mon Sep 17 00:00:00 2001
From: Stefan Schimanski <sts@lyx.org>
Date: Fri, 21 Dec 2007 20:43:50 +0000
Subject: [PATCH] * add \protect in front of macro with optional arguments
 because they are fragile

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@22243 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/MathMacro.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mathed/MathMacro.cpp b/src/mathed/MathMacro.cpp
index 5e8b478459..0d985a7f72 100644
--- a/src/mathed/MathMacro.cpp
+++ b/src/mathed/MathMacro.cpp
@@ -553,6 +553,10 @@ void MathMacro::write(WriteStream & os) const
 	// normal mode
 	BOOST_ASSERT(macro_);
 
+	// optional arguments make macros fragile
+	if (optionals_ > 0 && os.fragile())
+		os << "\\protect";
+	
 	os << "\\" << name();
 	bool first = true;
 	idx_type i = 0;
-- 
2.39.5