def _branch_elem_expand(start, end, context):
token = sequence(zeroToOne(sequence(tn(ID, 'id'), tn(ASSIGN))),
tn(TOKEN_ID, 'token'),
zeroToOne(_MultRule('mult'))
)
keyword = sequence(zeroToOne(sequence(tn(ID, 'id'), tn(ASSIGN))),
tn(KEYWORD_NAME, 'keyword'),
zeroToOne(_MultRule('mult'))
)
rule = sequence(zeroToOne(sequence(tn(ID, 'id'), tn(ASSIGN))),
tn(RULE_ID, 'rule'),
zeroToOne(_MultRule('mult'))
)
group = sequence(zeroToOne(sequence(tn(ID, 'id'), tn(ASSIGN))),
_GroupRule('group'),
zeroToOne(_MultRule('mult'))
)
start.connect(fork(
token,
keyword,
rule,
group
)).connect(end)
def _rule_expand(start, end, context):
branch = _BranchRule('branch')
start\
.connect(zeroToOne(tn(GRAMMAR_ANNOTATION, 'is-grammar')))\
.connect(tn(RULE_ID, 'rule-id'))\
.connect(tn(ASSIGN))\
.connect(branch)\
.connect(zeroToMany(sequence(tn(OR), branch)))\
.connect(tn(SEMICOLON))\
.connect(end)