84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
/*
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Serene --- Yet an other Lisp
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Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package core
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import (
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"errors"
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"serene-lang.org/bootstrap/pkg/ast"
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)
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// Def defines a global binding in the current namespace. The first
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// arguments in `args` has to be a symbol ( none ns qualified ) and
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// the second param should be the value of the binding
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func Def(rt *Runtime, scope IScope, args *List) (IExpr, error) {
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// TODO: Add support for docstrings and meta
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switch args.Count() {
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case 2:
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name := args.First()
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if name.GetType() != ast.Symbol {
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return nil, errors.New("the first argument of 'def' has to be a symbol")
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}
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sym := name.(*Symbol)
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valueExpr := args.Rest().First()
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value, err := EvalForms(rt, scope, valueExpr)
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if err != nil {
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return nil, err
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}
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ns := rt.CurrentNS()
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ns.DefineGlobal(sym.GetName(), value, true)
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return sym, nil
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}
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return nil, errors.New("'def' form need at least 2 arguments")
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}
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// Fn defines a function inside the given scope `scope` with the given `args`.
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// `args` contains the arugment list, docstring and body of the function.
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func Fn(rt *Runtime, scope IScope, args *List) (IExpr, error) {
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if args.Count() < 1 {
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return nil, errors.New("'fn' needs at least an arguments list")
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}
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var params IColl
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body := MakeEmptyBlock()
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arguments := args.First()
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// TODO: Add vector in here
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// Or any other icoll
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if arguments.GetType() == ast.List {
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params = arguments.(IColl)
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}
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if args.Count() > 1 {
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body.SetContent(args.Rest().(*List).ToSlice())
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}
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return MakeFunction(scope, params, body), nil
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}
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