%prec({a} < {b})%

%prec({b} < {c})%

%left_assoc(a, b, c)%

%right_assoc(d)%

3.14: *** Error:

prec_anno conflict: c < a

a,b

b,c

'a'

5.14: *** Error: identifier has already other associativity 'b'

5.16: *** Error: identifier has already other associativity 'a'

5.20: ### Hint: repeated associative identifier 'd'