feat(context): add api ExposeCaller

context.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"reflect"
 	"sync"
+	"unsafe"
 
 	"github.com/wdvxdr1123/ZeroBot/message"
 )
@@ -26,6 +27,11 @@ func (ctx *Ctx) GetMatcher() *Matcher {
 	return ctx.ma
 }
 
+// ExposeCaller as *T, maybe panic if misused
+func ExposeCaller[T any](ctx *Ctx) *T {
+	return (*T)(*(*unsafe.Pointer)(unsafe.Add(unsafe.Pointer(&ctx.caller), unsafe.Sizeof(uintptr(0)))))
+}
+
 // decoder 反射获取的数据
 type decoder []dec