From 90c1c5c344e86a66d3e1fb65710448043d939def Mon Sep 17 00:00:00 2001
From: Shikong <919411476@qq.com>
Date: Tue, 21 Sep 2021 01:55:46 +0800
Subject: [PATCH] =?UTF-8?q?docs:=20=E5=87=BD=E6=95=B0=E7=B1=BB=E5=9E=8B=20?=
 =?UTF-8?q?=E5=8F=82=E6=95=B0=E3=80=81=E8=BF=94=E5=9B=9E=E5=80=BC?=
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---
 base/function/type/main.go | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 base/function/type/main.go

diff --git a/base/function/type/main.go b/base/function/type/main.go
new file mode 100644
index 0000000..8996e0c
--- /dev/null
+++ b/base/function/type/main.go
@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+)
+
+func f1() {
+	fmt.Println("exec f1()")
+}
+
+func f2() string {
+	return fmt.Sprintln("exec f2()")
+}
+
+// 函数 也可作为 参数 的类型
+func f3(f func() string) {
+	fmt.Println("exec f3()")
+	fmt.Printf(f())
+}
+
+// 函数 还可以作为 返回值 类型
+func f4(x, y int) func() string {
+	return func() string {
+		return "inner func: " + strconv.Itoa(x+y) + "\n"
+	}
+}
+
+func main() {
+	// 函数类型 参数
+	mf1 := f1
+	mf1()
+	fmt.Printf("mf1: %T\n", mf1)
+
+	fmt.Println("=========================================================")
+
+	mf2 := f2
+	fmt.Printf(mf2())
+	fmt.Printf("mf2: %T\n", mf2)
+
+	fmt.Println("=========================================================")
+
+	mf3 := f3
+	mf3(mf2)
+	fmt.Printf("mf3: %T\n", mf3)
+
+	fmt.Println("=========================================================")
+
+	mf3(f4(2, 2))
+	fmt.Printf("f4: %T\n", f4)
+
+}