:-) Well done. Those comments weren't there ten years ago.
On 28 January 2013 18:17, Akim Demaille <a...@lrde.epita.fr> wrote: > > Le 28 janv. 2013 à 18:14, "John P. Hartmann" <jphartm...@gmail.com> a écrit : > >> Thank you for the clarification. I see. >> >> I guess I am handicapped by having converted the parser code to /360 >> assembler language. > > You are one of a kind :) > >> Others might have studied the skeleton code. Maybe a comment to the >> effect that one should forget having seen this assignment? > > Well, currently C++ reads: > > /* If YYLEN is nonzero, implement the default value of the action: > `$$ = $1'. Otherwise, use the top of the stack. > > Otherwise, the following line sets YYLHS.VALUE to garbage. > This behavior is undocumented and Bison > users should not rely upon it. */ > > and c reads: > > /* If YYLEN is nonzero, implement the default value of the action: > `$$ = $1'. > > Otherwise, the following line sets YYVAL to garbage. > This behavior is undocumented and Bison > users should not rely upon it. Assigning to YYVAL > unconditionally makes the parser a bit smaller, and it avoids a > GCC warning that YYVAL may be used uninitialized. */ > > but I guess it doesn't show in /360 assembler :) _______________________________________________ help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
