wip

vendor/github.com/antonmedv/expr/optimizer/optimizer.go

@@ -0,0 +1,37 @@
+package optimizer
+
+import (
+	. "github.com/antonmedv/expr/ast"
+	"github.com/antonmedv/expr/conf"
+)
+
+func Optimize(node *Node, config *conf.Config) error {
+	Walk(node, &inArray{})
+	for limit := 1000; limit >= 0; limit-- {
+		fold := &fold{}
+		Walk(node, fold)
+		if fold.err != nil {
+			return fold.err
+		}
+		if !fold.applied {
+			break
+		}
+	}
+	if config != nil && len(config.ConstExprFns) > 0 {
+		for limit := 100; limit >= 0; limit-- {
+			constExpr := &constExpr{
+				fns: config.ConstExprFns,
+			}
+			Walk(node, constExpr)
+			if constExpr.err != nil {
+				return constExpr.err
+			}
+			if !constExpr.applied {
+				break
+			}
+		}
+	}
+	Walk(node, &inRange{})
+	Walk(node, &constRange{})
+	return nil
+}