> Le 14 oct. 2018 à 16:43, Akim Demaille <[email protected]> a écrit : > > Yes, I read that too, and found it extremely ambiguous.
And Steve Johnson’s paper is just the same. https://www.epaperpress.com/lexandyacc/download/yacc.pdf By default, the value of a rule is the value of the first element in it ($1). Thus, grammar rules of the form A:B; frequently need not have an explicit action.
