serene-golang-implementation/bootstrap/pkg/core/nothing.go

56 lines
1.3 KiB
Go

/*
Serene --- Yet an other Lisp
Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package core
import (
"serene-lang.org/bootstrap/pkg/ast"
"serene-lang.org/bootstrap/pkg/hash"
)
type NothingType struct{}
var Nothing = NothingType{}
func (n NothingType) GetType() ast.NodeType {
return ast.Nothing
}
func (n NothingType) Hash() uint32 {
bytes := []byte("Nothing")
return hash.Of(append([]byte{byte(ast.Block)}, bytes...))
}
func (n NothingType) GetLocation() *ast.Location {
return ast.MakeUnknownLocation()
}
func (n NothingType) String() string {
return ""
}
func (n NothingType) ToDebugStr() string {
return ""
}
func (n NothingType) GetExecutionScope() IScope {
return nil
}
func (n NothingType) SetExecutionScope(scope IScope) {}