内置指令

[if](if.md) [switch](switch.md) [for](for.md) [foreach](foreach.md) [repeat](repeat.md) [show](show.md) [hide](hide.md) [include](include.md) [init](init.md) [exec](exec.md) [function](function.md) [extends](extends.md) [literal](literal.md) [selected](selected.md) [checked](checked.md) [model](model.md)