add float option (#8)

Signed-off-by: William Huang <ai.william@outlook.com>

Author: hex2dec

config_opts.go

@@ -71,6 +71,8 @@ func (c *ConfigOpts) RegisterOpt(group *OptGroup, opt interface{}) {
 		c.registerBoolOpt(section, v)
 	case *IntOpt:
 		c.registerIntOpt(section, v)
+	case *FloatOpt:
+		c.registerFloatOpt(section, v)
 	case *ListOpt:
 		c.registerListOpt(section, v)
 	case *URIOpt:
@@ -139,6 +141,23 @@ func (c *ConfigOpts) GetInt(group, option string) (int, error) {
 	return c.cfg.Section(group).Key(option).Int()
 }
 
+func (c *ConfigOpts) registerFloatOpt(section *ini.Section, opt *FloatOpt) {
+	if section == nil || opt == nil {
+		return
+	}
+
+	if section.HasKey(opt.Name()) {
+		return
+	}
+
+	value := strconv.FormatFloat(opt.Default(), "f", -1, 64)
+	_, _ = section.NewKey(opt.Name(), value)
+}
+
+func (c *ConfigOpts) GetFloat(group, option string) (float64, error) {
+	return c.cfg.Section(group).Key(option).Float64()
+}
+
 func (c *ConfigOpts) registerListOpt(section *ini.Section, opt *ListOpt) {
 	if section == nil || opt == nil {
 		return

float_opt.go

@@ -0,0 +1,29 @@
+// Copyright 2021 TFCloud Co.,Ltd. All rights reserved.
+// This source code is licensed under Apache-2.0 license
+// that can be found in the LICENSE file.
+
+package config
+
+type FloatOpt struct {
+	name         string
+	defaultValue float64
+}
+
+func NewFloatOpt(name string) *FloatOpt {
+	return &FloatOpt{
+		name: name,
+	}
+}
+
+func (o *FloatOpt) WithDefault(value float64) *FloatOpt {
+	o.defaultValue = value
+	return o
+}
+
+func (o *FloatOpt) Name() string {
+	return o.name
+}
+
+func (o *FloatOpt) Default() float64 {
+	return o.defaultValue
+}