chore: upgrade coredns version (#550)

vendor/github.com/expr-lang/expr/builtin/utils.go

@@ -0,0 +1,90 @@
+package builtin
+
+import (
+	"fmt"
+	"reflect"
+	"time"
+
+	"github.com/expr-lang/expr/internal/deref"
+)
+
+var (
+	anyType      = reflect.TypeOf(new(any)).Elem()
+	integerType  = reflect.TypeOf(0)
+	floatType    = reflect.TypeOf(float64(0))
+	arrayType    = reflect.TypeOf([]any{})
+	mapType      = reflect.TypeOf(map[any]any{})
+	timeType     = reflect.TypeOf(new(time.Time)).Elem()
+	locationType = reflect.TypeOf(new(time.Location))
+)
+
+func kind(t reflect.Type) reflect.Kind {
+	if t == nil {
+		return reflect.Invalid
+	}
+	t = deref.Type(t)
+	return t.Kind()
+}
+
+func types(types ...any) []reflect.Type {
+	ts := make([]reflect.Type, len(types))
+	for i, t := range types {
+		t := reflect.TypeOf(t)
+		if t.Kind() == reflect.Ptr {
+			t = t.Elem()
+		}
+		if t.Kind() != reflect.Func {
+			panic("not a function")
+		}
+		ts[i] = t
+	}
+	return ts
+}
+
+func toInt(val any) (int, error) {
+	switch v := val.(type) {
+	case int:
+		return v, nil
+	case int8:
+		return int(v), nil
+	case int16:
+		return int(v), nil
+	case int32:
+		return int(v), nil
+	case int64:
+		return int(v), nil
+	case uint:
+		return int(v), nil
+	case uint8:
+		return int(v), nil
+	case uint16:
+		return int(v), nil
+	case uint32:
+		return int(v), nil
+	case uint64:
+		return int(v), nil
+	default:
+		return 0, fmt.Errorf("cannot use %T as argument (type int)", val)
+	}
+}
+
+func bitFunc(name string, fn func(x, y int) (any, error)) *Function {
+	return &Function{
+		Name: name,
+		Func: func(args ...any) (any, error) {
+			if len(args) != 2 {
+				return nil, fmt.Errorf("invalid number of arguments for %s (expected 2, got %d)", name, len(args))
+			}
+			x, err := toInt(args[0])
+			if err != nil {
+				return nil, fmt.Errorf("%v to call %s", err, name)
+			}
+			y, err := toInt(args[1])
+			if err != nil {
+				return nil, fmt.Errorf("%v to call %s", err, name)
+			}
+			return fn(x, y)
+		},
+		Types: types(new(func(int, int) int)),
+	}
+}