62 lines
1.5 KiB
Go
62 lines
1.5 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 (
|
|
"errors"
|
|
|
|
"serene-lang.org/bootstrap/pkg/ast"
|
|
)
|
|
|
|
/** TODO:
|
|
Make sure to implement INode for Def as well to be able to point
|
|
to the write place at the input stream for error messages.
|
|
*/
|
|
|
|
type def struct{}
|
|
|
|
var Def = def{}
|
|
|
|
func (d def) Apply(rt *Runtime, scope IScope, args *List) (IExpr, error) {
|
|
switch args.Count() {
|
|
case 2:
|
|
name := args.First()
|
|
|
|
if name.GetType() != ast.Symbol {
|
|
return nil, errors.New("The first argument of 'def' has to be a symbol")
|
|
}
|
|
|
|
sym := name.(*Symbol)
|
|
|
|
//value = args.Rest().(*List).First()
|
|
valueExpr := args.Rest().First()
|
|
value, err := EvalForm(rt, scope, valueExpr)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ns := rt.CurrentNS()
|
|
ns.DefineGlobal(sym.GetName(), value, true)
|
|
return sym, nil
|
|
}
|
|
|
|
return nil, errors.New("'def' form need at least 2 arguments")
|
|
}
|