增加g.Throw抛异常方法，g.TryCatch异常捕获方法封装

g/g_func.go

@@ -37,3 +37,13 @@ func Wait() {
 func Dump(i...interface{}) {
     gutil.Dump(i...)
 }
+
+// 抛出一个异常
+func Throw(err interface{}) {
+    gutil.Throw(err)
+}
+
+// try...catch...
+func TryCatch(try func(), catch func(err interface{})) {
+    gutil.TryCatch(try, catch)
+}

g/util/gutil/gutil.go

@@ -65,3 +65,18 @@ func PrintBacktrace() {
     glog.Header(false).Print(buffer.String())
 }
 
+// 抛出一个异常
+func Throw(err interface{}) {
+    panic(err)
+}
+
+// try...catch...
+func TryCatch(try func(), catch func(err interface{})) {
+    defer func() {
+        if err := recover(); err != nil {
+            catch(err)
+        }
+    }()
+    try()
+}
+

g/util/gutil/gutil_test.go

@@ -0,0 +1,23 @@
+// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+// go test *.go -bench=".*" -benchmem
+
+package gutil
+
+import (
+    "testing"
+)
+
+func Benchmark_TryCatch(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        TryCatch(func() {
+            
+        }, func(err interface{}) {
+            
+        })
+    }
+}

geg/other/test.go

@@ -1,14 +1,16 @@
 package main
 
 import (
-    "gitee.com/johng/gf/g"
-    "gitee.com/johng/gf/g/net/ghttp"
+    "fmt"
+    "gitee.com/johng/gf/g/util/gutil"
 )
 
 func main() {
-    g.Server().BindHandler("/", func(r *ghttp.Request) {
-        r.Response.Write(r.GetInt("amount"))
+    gutil.TryCatch(func() {
+        fmt.Println(1)
+        panic("error")
+        fmt.Println(2)
+    }, func(err interface{}) {
+        fmt.Println(err)
     })
-    g.Server().SetPort(8199)
-    g.Server().Run()
 }

geg/util/gutil/try_catch.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+    "fmt"
+    "gitee.com/johng/gf/g/util/gutil"
+)
+
+func main() {
+    gutil.TryCatch(func() {
+        fmt.Println(1)
+        gutil.Throw("error")
+        fmt.Println(2)
+    }, func(err interface{}) {
+        fmt.Println(err)
+    })
+}