def _trans_tokendef(self, ast):
ret = Ast('tokendef')
token_id = ast.find_children_by_id('token_id')[0]
regex = ast.find_children_by_id('regex')[0]
ret.add_child(Ast('id', token_id.value))
ret.add_child(Ast('regex', regex.value))
return ret
def _cond_branch(ast):
ret = Ast('branch')
test = Ast('test')
ret.add_child(test)
test.add_children_by_id(ast, 'test')
consequent = Ast('consequent')
ret.add_child(consequent)
consequent.add_children_by_id(ast, 'consequent')
return ret
def _call(ast):
ret = Ast('call')
callee = Ast('callee')
ret.add_child(callee)
callee.add_children_by_id(ast, 'callee')
args = Ast('arguments')
ret.add_child(args)
args.add_children_by_id(ast, 'arg')
return ret
def _trans_productionrule(self, ast):
ret = Ast('ruledef')
annots = ast.find_children_by_id('annot')
if annots:
ret.set_attr('start', "true")
id_ = ast.find_children_by_id('rule_id')[0]
ret.add_child(Ast('id', id_.value))
rhs = ast.find_children_by_id('rhs')[0]
rhs.id = ""
ret.add_child(rhs)
return ret
def _fundef(ast):
ret = Ast('fundef')
name_node = ast.find_children_by_id('name')[0]
ret.set_attr('name', name_node.value)
params = Ast('parameters')
ret.add_child(params)
param_nodes = ast.find_children_by_id('param')
for param_node in param_nodes:
params.add_child(Ast('parameter', param_node.value))
vararg = ast.find_children_by_id('vararg')
if vararg:
vararg = vararg[0]
params.add_child(Ast('var', vararg.value[:-1]))
localdefs = Ast('localdefs')
ret.add_child(localdefs)
localdefs.add_children_by_id(ast, 'localdef')
body = Ast('body')
ret.add_child(body)
body.add_children_by_id(ast, 'body')
return ret
def _trans_stringdef(self, ast):
ret = Ast('stringdef')
start = ast.find_children_by_id('start')[0]
end = ast.find_children_by_id('end')[0]
escs = ast.find_children_by_id('escape')
esc = escs and escs[0].value or None
ids = ast.find_children_by_id('token_id')
token_id = ids and ids[0].value or 'STRING'
ret.add_child(Ast('id', token_id))
ret.add_child(Ast('start', start.value))
ret.add_child(Ast('end', end.value))
if esc is not None:
ret.add_child(Ast('escape', esc))
return ret
def _trans_commentdef(self, ast):
ret = Ast('commentdef')
start = ast.find_children_by_id('start')[0]
end = ast.find_children_by_id('end')[0]
ret.add_child(Ast('start', start.value))
ret.add_child(Ast('end', end.value))
if ast.find_children_by_id('nestable'):
ret.add_child(Ast('nestable'))
return ret
def _trans_branch(self, ast):
ret = Ast('sequence')
children = ast.get_children()
prev = None
for child in children:
if child.id == 'card':
card_child = child.get_children()[0]
cardinality = {
'?': 'optional',
'+': 'one-or-more',
'*': 'many'
}[card_child.value]
prev.set_attr('cardinality', cardinality)
else:
if child.id == "keyword":
child = Ast('keyword', child.value)
ret.add_child(child)
prev = child
if len(ret.get_children()) != 1:
return ret
else:
return prev
def _if_expr(ast):
ret = Ast('if_expr')
test = Ast('test')
ret.add_child(test)
test.add_children_by_id(ast, 'test')
consequent = Ast('consequent')
ret.add_child(consequent)
consequent.add_children_by_id(ast, 'consequent')
alternate = Ast('alternate')
ret.add_child(alternate)
alternate.add_children_by_id(ast, 'alternate')
return ret
def _start(ast):
ret = Ast('hackeme')
for child in ast.get_children():
child.id = ''
ret.add_child(child)
return ret
def _trans_whitespace(self, ast):
wschars = ast.find_children_by_id('wschars')
ret = Ast('whitespace')
for wschar in wschars:
ret.add_child(Ast('wschar', wschar.value))
return ret