add build-in fuction json for package gview

os/gview/gview.go

@@ -137,6 +137,7 @@ func New(path ...string) *View {
 		"dump":       view.buildInFuncDump,
 		"map":        view.buildInFuncMap,
 		"maps":       view.buildInFuncMaps,
+		"json":       view.buildInFuncJson,
 	})
 
 	return view

os/gview/gview_buildin.go

@@ -8,6 +8,7 @@ package gview
 
 import (
 	"fmt"
+	"github.com/gogf/gf/internal/json"
 	"github.com/gogf/gf/util/gutil"
 	"strings"
 
@@ -215,3 +216,10 @@ func (view *View) buildInFuncToLower(str interface{}) string {
 func (view *View) buildInFuncNl2Br(str interface{}) string {
 	return gstr.Nl2Br(gconv.String(str))
 }
+
+// buildInFuncJson implements build-in template function: json ,
+// which encodes and returns <value> as JSON string.
+func (view *View) buildInFuncJson(value interface{}) (string, error) {
+	b, err := json.Marshal(value)
+	return gconv.UnsafeBytesToStr(b), err
+}

os/gview/gview_unit_basic_test.go

@@ -400,3 +400,15 @@ func Test_BuildInFuncDump(t *testing.T) {
 		t.Assert(gstr.Contains(r, `"score": 100`), true)
 	})
 }
+
+func Test_BuildInFuncJson(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		v := gview.New()
+		v.Assign("v", g.Map{
+			"name": "john",
+		})
+		r, err := v.ParseContent("{{json .v}}")
+		t.Assert(err, nil)
+		t.Assert(r, `{"name":"john"}`)
+	})
+}