示例#1
0
 def inner(expr, env):
     if sequence.is_last_expr(expr):
         return self._eval(sequence.first_expr(expr), env)
     first_value = self._eval(sequence.first_expr(expr), env)
     if first_value:
         return first_value
     return inner(sequence.rest_exprs(expr), env)
示例#2
0
 def _eval_sequence(self, expressions, env):
     if sequence.is_last_expr(expressions):
         return self._eval(sequence.first_expr(expressions), env)
     else:
         self._eval(sequence.first_expr(expressions), env)
         return self._eval_sequence(sequence.rest_exprs(expressions), env)
示例#3
0
 def inner(expr, env):
     if sequence.is_last_expr(expr):
         return self._eval(sequence.first_expr(expr), env)
     if not self._eval(sequence.first_expr(expr), env):
         return Boolean(False)
     return inner(sequence.rest_exprs(expr), env)