Manual

90 Bison 2.3
. . .
The next section lists states that still have conflicts.
State 8 conflicts: 1 shift/reduce
State 9 conflicts: 1 shift/reduce
State 10 conflicts: 1 shift/reduce
State 11 conflicts: 4 shift/reduce
The next section reports useless tokens, nonterminal and rules. Useless nonterminals and
rules are removed in order to produce a smaller parser, but useless tokens are preserved,
since they might be used by the scanner (note the difference between “useless” and “not
used” below):
Useless nonterminals:
useless
Terminals which are not used:
STR
Useless rules:
#6 useless: STR;
The next section reproduces the exact grammar that Bison used:
Grammar
Number, Line, Rule
0 5 $accept -> exp $end
1 5 exp -> exp ’+’ exp
2 6 exp -> exp ’-’ exp
3 7 exp -> exp ’*’ exp
4 8 exp -> exp ’/’ exp
5 9 exp -> NUM
and reports the uses of the symbols:
Terminals, with rules where they appear
$end (0) 0
’*’ (42) 3
’+’ (43) 1
’-’ (45) 2
’/’ (47) 4
error (256)
NUM (258) 5
Nonterminals, with rules where they appear
$accept (8)
on left: 0
exp (9)
on left: 1 2 3 4 5, on right: 0 1 2 3 4