def read_token(self, token):
"""turns a Token into a lispy form"""
if token.type == "symbol":
return symbol(token.text)
elif token.type in ["number", "string"]:
return eval(token.text)
elif token.type == "macro":
return self.macro_funcs[token.text](token)
assert False, "unexpected token type %r" % token.type
def read_unquote_splicing(self, token):
token = self.tokens.next()
if token.type == "end":
raise mkSyntaxError("EOF after \",@\" (unquote-splicing)",
self.filename,
token.line_no,
token.col,
token.linetext,
completable=True)
return (symbol("__lispy__:unquote-splicing"), self.read_token(token))
def read_quasiquote(self, token):
token = self.tokens.next()
if token.type == "end":
raise mkSyntaxError("EOF after \"`\" (quasiquote)",
self.filename,
token.line_no,
token.col,
token.linetext,
completable=True)
return (symbol("__lispy__:quasiquote"), self.read_token(token))
def read(self):
forms = []
while 1:
token = self.tokens.next()
if token.type == "end":
break
else:
forms.append(self.read_token(token))
if len(forms) == 0:
return None
if len(forms) == 1:
return forms[0]
return (symbol("__lispy__:do"), ) + tuple(forms)