add config

config/value.go

@@ -0,0 +1,49 @@
+package config
+
+import (
+	"time"
+
+	"github.com/micro/go-micro/config/reader"
+)
+
+type value struct{}
+
+func newValue() reader.Value {
+	return new(value)
+}
+
+func (v *value) Bool(def bool) bool {
+	return false
+}
+
+func (v *value) Int(def int) int {
+	return 0
+}
+
+func (v *value) String(def string) string {
+	return ""
+}
+
+func (v *value) Float64(def float64) float64 {
+	return 0.0
+}
+
+func (v *value) Duration(def time.Duration) time.Duration {
+	return time.Duration(0)
+}
+
+func (v *value) StringSlice(def []string) []string {
+	return nil
+}
+
+func (v *value) StringMap(def map[string]string) map[string]string {
+	return map[string]string{}
+}
+
+func (v *value) Scan(val interface{}) error {
+	return nil
+}
+
+func (v *value) Bytes() []byte {
+	return nil
+}