expr
Golang rule engine, support logical expression
Support type: int string float bool
Support operation: > < >= <= && || + - * /
Support two inner funnction: in_array(1, []int{1,2,3,4}), ver_compare(x, ">", "10.1.1") with no nested
I believe it satisfy most filter scenarios using rule engine for logical expression.
Finally, Welcome contribution or requirement.
How to use it
package main
import (
expr "github.com/pjnr1/expr"
log "github.com/s00500/env_logger"
)
func main() {
expr := "1.0 * 2.0 > 1.5 + _test_"
control := map[string]interface{}{"_test_": 1.5}
engine, err := expr.NewEngine(expr)
log.Must(err)
result, err := engine.RunRule(control)
log.Must(err)
log.Infoln(result)
}the ast parser using Golang go/ast and go/parser, rule can be update using engine.UpdateAst to avoid parse the rule each time. more demo please refer to the expr_test.go
Contributing
Pull requests, bug fixes and issue reports are welcome and appreciated.
Licence
MIT