ssa: fix closure type

_demo/reflectfunc/reflectfunc.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"reflect"
+)
+
+func add(a, b int) int {
+	return a + b
+}
+
+func main() {
+	fn := func(a, b int) int {
+		return a + b
+	}
+	var i int
+	fn1 := func() {
+		i++
+	}
+	fn2 := func() func() {
+		return func() {
+			println("closure", i)
+		}
+	}
+	fns := []any{add, fn, fn1, fn2}
+	for _, fn := range fns {
+		v := reflect.ValueOf(fn)
+		fmt.Println(v.Type())
+		fmt.Println(v.Kind())
+		if v.Kind() != reflect.Func {
+			panic(fmt.Sprintf("not func: %T", fn))
+		}
+
+		t := v.Type()
+		fmt.Println(t)
+		fmt.Println(t.Kind())
+		if t.Kind() != reflect.Func {
+			panic(fmt.Sprintf("not func: %T", fn))
+		}
+	}
+}