Bison exception 2.2
Bison-exception-2.2
Typically used with GPL-2.0-only or GPL-2.0-and-later or GPL-3.0-only or GPL-3.0-and-later
Text in italicized blue is omittable (see Matching Guidelines B.3.5). License or exception text will match to the text for the specified identifier if it either includes or excludes this omittable text.
Text in red is replaceable (see Matching Guidelines B.3.4). License or exception text will match to the text for the specified identifier if it includes a permitted variant of this replaceable text. The permitted variants can be found in the corresponding regular expression as shown in title text visible by hovering over the red text.
Bison Exception
As a special exception, you may create a larger work that contains part or all of the Bison parser skeleton and distribute that work under terms of your choice, so long as that work isn't itself a parser generator using the skeleton or a modified version thereof as a parser skeleton. Alternatively, if you modify or redistribute the parser skeleton itself, you may (at your option) remove this special exception, which will cause the skeleton and the resulting Bison output files to be licensed under the GNU General Public License without this special exception.
This special exception was added by the Free Software Foundation in version 2.2 of Bison.