serene/bootstrap/pkg/types/nil.go

46 lines
1.0 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 types
import "serene-lang.org/bootstrap/pkg/ast"
type NilType struct{}
var Nil = NilType{}
func (n NilType) Eval() IExpr {
return &Nil
}
func (n NilType) GetType() ast.NodeType {
return ast.Nil
}
func (n NilType) GetLocation() int {
return 0
}
func (n NilType) String() string {
return "nil"
}
func (n NilType) ToDebugStr() string {
return "nil"
}