Redefining the literal string associated to the YYerror symbol

[Daniele Nicolodi]

Hello,

in Bison 3.6 is it possible to redefine the literal string associated to
the YYerror symbol (and to the YYEOF, YYUNDEF ones, although I don't
have immediate need for this)?

Doing it in the naive way:

%token YYerror "ERROR"

results in a warning:

warning: symbol YYerror given more than one literal string [-Wother]
  180 | %token YYerror "ERROR"
      |                ^~~~~~~

and in the literal string not being updated.

Thank you.

Cheers,
Dan