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类似 sql 的 where 字句,这种表达式要怎么建模比较好
zxCoder
·
Jan 6, 2021
· 603 views
This topic created in 1959 days ago, the information mentioned may be changed or developed.
class Expr{ Value val; Expr left; Operator op; Expr right; }
二元表达式这么表示,那加上一元的,要怎么设计比较合理又简洁一点
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expr
表达式
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