mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-06-21 06:04:33 +00:00
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright 2024 the libevm authors.
|
|
//
|
|
// The libevm additions to go-ethereum are free software: you can redistribute
|
|
// them and/or modify them under the terms of the GNU Lesser General Public License
|
|
// as published by the Free Software Foundation, either version 3 of the License,
|
|
// or (at your option) any later version.
|
|
//
|
|
// The libevm additions are distributed in the hope that they will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
|
|
// General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
package pseudo
|
|
|
|
import (
|
|
"reflect"
|
|
|
|
"github.com/ava-labs/libevm/rlp"
|
|
)
|
|
|
|
// Reflection is used as a last resort in pseudo types so is limited to this
|
|
// file to avoid being seen as the norm. If you are adding to this file, please
|
|
// try to achieve the same results with type parameters.
|
|
|
|
func (c *concrete[T]) isZero() bool {
|
|
// The alternative would require that T be comparable, which would bubble up
|
|
// and invade the rest of the code base.
|
|
return reflect.ValueOf(c.val).IsZero()
|
|
}
|
|
|
|
func (c *concrete[T]) equal(t *Type) bool {
|
|
d, ok := t.val.(*concrete[T])
|
|
if !ok {
|
|
return false
|
|
}
|
|
switch v := any(c.val).(type) {
|
|
case EqualityChecker[T]:
|
|
return v.Equal(d.val)
|
|
default:
|
|
// See rationale for reflection in [concrete.isZero].
|
|
return reflect.DeepEqual(c.val, d.val)
|
|
}
|
|
}
|
|
|
|
func (c *concrete[T]) DecodeRLP(s *rlp.Stream) error {
|
|
switch v := reflect.ValueOf(c.val); v.Kind() {
|
|
case reflect.Pointer:
|
|
if v.IsNil() {
|
|
el := v.Type().Elem()
|
|
c.val = reflect.New(el).Interface().(T) //nolint:forcetypeassert // Invariant scoped to the last few lines of code so simple to verify
|
|
}
|
|
return s.Decode(c.val)
|
|
default:
|
|
return s.Decode(&c.val)
|
|
}
|
|
}
|