go sizeof_test 源码
golang sizeof_test 代码
文件路径：/src/cmd/compile/internal/types2/sizeof_test.go
// Copyright 2021 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 types2
import (
"reflect"
"testing"
)
// Signal size changes of important structures.
func TestSizeof(t *testing.T) {
const _64bit = ^uint(0)>>32 != 0
var tests = []struct {
val interface{} // type as a value
_32bit uintptr // size on 32bit platforms
_64bit uintptr // size on 64bit platforms
}{
// Types
{Basic{}, 16, 32},
{Array{}, 16, 24},
{Slice{}, 8, 16},
{Struct{}, 24, 48},
{Pointer{}, 8, 16},
{Tuple{}, 12, 24},
{Signature{}, 28, 56},
{Union{}, 12, 24},
{Interface{}, 40, 80},
{Map{}, 16, 32},
{Chan{}, 12, 24},
{Named{}, 60, 112},
{TypeParam{}, 28, 48},
{term{}, 12, 24},
// Objects
{PkgName{}, 64, 104},
{Const{}, 64, 104},
{TypeName{}, 56, 88},
{Var{}, 64, 104},
{Func{}, 64, 104},
{Label{}, 60, 96},
{Builtin{}, 60, 96},
{Nil{}, 56, 88},
// Misc
{Scope{}, 60, 104},
{Package{}, 40, 80},
{_TypeSet{}, 28, 56},
}
for _, test := range tests {
got := reflect.TypeOf(test.val).Size()
want := test._32bit
if _64bit {
want = test._64bit
}
if got != want {
t.Errorf("unsafe.Sizeof(%T) = %d, want %d", test.val, got, want)
}
}
}
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