art-template each 写法问题

Question

已知对象 {curr: {…}, examine: Array(2)}

//写法不报错，但是和预计循环examine不一致，会循环整个对象
{{each (examine || [])}}
<tr>...</tr>
{{/each}}
//改为如下，循环和预计一致
{{set list = examine || [] }}
{{each list}}
<tr>...</tr>
{{/each}}

each是只支持后接变量的写法么