add clarifying comment

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15929 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/insets/insetbibtex.C b/src/insets/insetbibtex.C
index c0fe99bcdee483295d792483f493a8d019bc3c76..5c59adf70233edc3de9048531c985563d27162da 100644 (file)
--- a/src/insets/insetbibtex.C
+++ b/src/insets/insetbibtex.C
@@ -155,6 +155,9 @@ int InsetBibtex::latex(Buffer const & buffer, odocstream & os,
        typedef boost::tokenizer<Separator, docstring::const_iterator, docstring> Tokenizer;
 
        Separator const separator(from_ascii(",").c_str());
+       // The tokenizer must not be called with temporary strings, since
+       // it does not make a copy and uses iterators of the string further
+       // down. getParam returns a reference, so this is OK.
        Tokenizer const tokens(getParam("bibfiles"), separator);
        Tokenizer::const_iterator const begin = tokens.begin();
        Tokenizer::const_iterator const end = tokens.end();