golang 表达式引擎，规则引擎，支持自定义函数，自定义中缀操作符，自定义前缀操作符，支持传参以及参数层级嵌套,支持数组，字符串，数字，变量等操作,Golang expression engine, rule engine, support custom functions, custom infix operators, custom prefix operators, support parameter passing and parameter hierarchical nesting, support arrays, strings, numbers, variables and other operations