@struct_type -> "struct" "ID" "{"  member_list "}" "EOF"
member_list-> type_spec declarators ";"
type_spec -> base_type_spec
type_spec -> struct_type
base_type_spec -> floating_pt_type
base_type_spec -> integer_type
base_type_spec -> "char"
base_type_spec ->  "boolean"
floating_pt_type -> "float"
floating_pt_type -> "double"
floating_pt_type -> "long" "double"
integer_type -> signed_int
integer_type -> unsigned_int

signed_int -> "short"
signed_int -> "int16"
signed_int -> "long"
signed_int -> "int32"
signed_int -> "long" "long"
signed_int -> "int64"
signed_int -> "int8"

unsigned_int -> "unsigned" "short"
unsigned_int -> "unsigned" "long"
unsigned_int -> "unsigned" "long" "long"
unsigned_int -> "unit16"
unsigned_int -> "unit32"
unsigned_int -> "unit64"
unsigned_int -> "unit8"

declarators -> declarator more_declarators
more_declarators -> "," declarator
more_declarators -> ε

declarator -> "ID" more_declarator
more_declarator -> exp_list
more_declarator -> ε

exp_list -> "[" or_expr more_or_expr "]"
more_or_expr -> "," or_expr
more_or_expr -> ε
xor_expr -> and_expr more_and_expr
more_and_expr -> "^" and_expr
more_and_expr -> ε
and_expr -> shift_expr more_shift_expr
more_shift_expr -> "&" shift_expr
more_shift_expr -> ε
shift_expr -> add_expr more_add_expr
more_add_expr -> shift_sign add_expr
shift_sign -> ">>"
shift_sign -> "<<"
add_expr -> multi_expr more_multi_expr
more_multi_expr -> multi_sign multi_expr
multi_sign -> "+"
multi_sign -> "-"
multi_expr -> unary_expr more_unary_expr
more_unary_expr -> unary_sign unary_expr
more_unary_expr -> ε
unary_sign -> "*"
unary_sign -> "/"
unary_sign -> "%"
unary_expr -> unary_sign_2 unary_declare
unary_sign_2 -> "-"
unary_sign_2 -> "+"
unary_sign_2 -> "~"
unary_declare -> "INTEGER"
unary_declare -> "STRING"
unary_declare -> "BOOLEAN"