88 lines
2.6 KiB
Go
88 lines
2.6 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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// BUILTINS is used in the Runtime to support builtin functions of
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// the language which are implemented in Go
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var BUILTINS = map[string]NativeFunction{
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"pr": MakeNativeFn("pr", PrNativeFn),
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"prn": MakeNativeFn("prn", PrnNativeFn),
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"print": MakeNativeFn("print", PrintNativeFn),
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"println": MakeNativeFn("println", PrintlnNativeFn),
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"require": MakeNativeFn("require", RequireNativeFn),
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"hash": MakeNativeFn("hash", HashNativeFn),
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}
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func PrNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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Pr(rt, toRepresentables(args.Rest().(IColl))...)
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return MakeNil(n), nil
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}
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func PrnNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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Prn(rt, toRepresentables(args.Rest().(IColl))...)
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return MakeNil(n), nil
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}
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func PrintNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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Print(rt, toRepresentables(args.Rest().(IColl))...)
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return MakeNil(n), nil
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}
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func PrintlnNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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Println(rt, toRepresentables(args.Rest().(IColl))...)
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return MakeNil(n), nil
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}
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func RequireNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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switch args.Count() {
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case 0:
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return nil, MakeError(rt, args, "'require' function is missing")
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case 1:
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return nil, MakeError(rt, args.First(), "'require' function needs at least one argument")
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default:
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}
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var result IExpr
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var err IError
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for _, ns := range args.Rest().(*List).ToSlice() {
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result, err = RequireNamespace(rt, ns)
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if err != nil {
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return nil, err
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}
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}
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return result, nil
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}
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func HashNativeFn(rt *Runtime, scope IScope, n Node, args *List) (IExpr, IError) {
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if args.Count() != 2 {
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return nil, MakeError(rt, args.First(), "'hash' function needs exactly one argument")
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}
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expr := args.Rest().First()
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result, err := MakeInteger(expr.Hash())
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if err != nil {
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return nil, err
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}
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result.Node = n
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return result, nil
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}
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