comit
Merge branch 'master' of https://github.com/tddl/tddl
类型计算加入对null和0的处理
Merge branch 'master' of https://github.com/tddl/tddl
Merge branch 'master' of https://github.com/tddl/tddl
Merge branch 'master' of https://github.com/tddl/tddl
Merge branch 'master' of https://github.com/tddl/tddl
comit