b_dict = sickle.Seq(dict_start, dict_elements, end)
b_list = sickle.Seq(list_start, list_elements, end)
b_int = sickle.Seq(int_start, b_sint, end)
b_string = sickle.LengthValue(sickle.Left(parseUint(b_uint), colon), sickle.Byte())
dict_elements = sickle.Many(dict_element)
list_elements = sickle.Many(list_element)
dict_element = sickle.Seq(b_string, any_type)
list_element = any_type
b_uint = flatten(sickle.Choice(zero, whole_num))
b_sint = flatten(sickle.Choice(zero, whole_num, neg_num))
zero = sickle.Ch('0')
whole_num = sickle.Seq(pos_digit, sickle.Many(digit))
neg_num = sickle.Seq(neg, whole_num)
neg = sickle.Ch('-')
pos_digit = sickle.ChRange('1', '9')
digit = sickle.ChRange('0', '9')
int_start = sickle.Ch('i')
list_start = sickle.Ch('l')
dict_start = sickle.Ch('d')
end = sickle.Ch('e')
colon = sickle.Ch(':')
)
func flatten(r sickle.Rule) sickle.Rule {
"os"
"github.com/davecgh/go-spew/spew"
"sickle"
)
func init() {
expr.Bind(expr_actual)
}
var (
Rule = expr
expr = sickle.Indirect()
expr_actual = sickle.Choice(
sickle.Seq(sickle.Ch('('), expr, sickle.Ch(')')),
additive_term,
)
additive_term = sickle.Choice(
sickle.Seq(multiplicative_term, sickle.Ch('+'), multiplicative_term),
sickle.Seq(multiplicative_term, sickle.Ch('-'), multiplicative_term),
multiplicative_term,
)
multiplicative_term = sickle.Choice(
sickle.Seq(digit, sickle.Ch('*'), digit),
sickle.Seq(digit, sickle.Ch('/'), digit),
digit,
)
"sickle"
)
func init() {
comment.Bind(comment_actual)
}
// lexical fragments: these are not terminals themselves but are used to build
// terminals.
var (
digits = sickle.Many1(sickle.ChRange('0', '9'))
digits_opt = sickle.Many(sickle.ChRange('0', '9'))
ncname_start_char = sickle.Choice(
sickle.ChRange('A', 'Z'),
sickle.Ch('_'),
sickle.ChRange('a', 'z'),
sickle.ChRange(0xC0, 0xD6),
sickle.ChRange(0xD8, 0xF6),
sickle.ChRange(0xF8, 0x2FF),
sickle.ChRange(0x370, 0x37D),
sickle.ChRange(0x27F, 0x1FFF),
sickle.ChRange(0x200C, 0x200D),
sickle.ChRange(0x2070, 0x218F),
sickle.ChRange(0x2C00, 0x2FEF),
sickle.ChRange(0x3001, 0xD7FF),
sickle.ChRange(0xF900, 0xFDCF),
sickle.ChRange(0xFDF0, 0xFFFD),
sickle.ChRange(0x10000, 0xEFFFF),
)
