golang sizeof_test 代码
文件路径：/src/cmd/compile/internal/ssa/sizeof_test.go
/ Copyright 2016 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package ssa
import (
"reflect"
"testing"
"unsafe"
)
/ Assert that the size of important structures do not change unexpectedly.
func TestSizeof(t *testing.T) {
const _64bit = unsafe.Sizeof(uintptr(0)) == 8
var tests = []struct {
val interface{} / type as a value
_32bit uintptr / size on 32bit platforms
_64bit uintptr / size on 64bit platforms
}{
{Value{}, 72, 112},
{Block{}, 164, 304},
{LocalSlot{}, 28, 40},
{valState{}, 28, 40},
}
for _, tt := range tests {
want := tt._32bit
if _64bit {
want = tt._64bit
}
got := reflect.TypeOf(tt.val).Size()
if want != got {
t.Errorf("unsafe.Sizeof(%T) = %d, want %d", tt.val, got, want)
}
}
}