1)
Declaration of tokens
%token
TYPE_OF_TOKEN
2)
Specification of
asociativity
&
precedence
in
an ambigous grammar.
Section I: Declaration
Example:
%token
INTEGER
%token
ID
%left
‘+’
%left
‘*’
66/69
%left
op
i1
, op
i2
, … ,op
im
%left
op
j1
, op
j2
, … ,op
jm
…
%right
op
k1
, op
k2
, … ,op
kp
The same precedence
Higher
precedence
Associativity
of the following operators