> ! is a prefix operator; = is infix.
Sorry, but I read bison's documentation regarding infix operators and
precedence levels, and I still don't understand your short explanation.
Here is another simple grammar with only infix operators that has conflicts:
%left '&'
%left '='
%left '+'
%%
start : bool_expr;
bool_expr : bool_expr '&' bool_expr
| num_expr '=' num_expr
| 'b'
;
num_expr : bool_expr
| num_expr '+' num_expr
| 'n'
;
%%
All operators have defined precedence levels, so why is it ambiguous?
Thanks,
Florent
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