Go: use slices for list values

cmd/interpreter/main.go

@@ -49,14 +49,12 @@ func main() {
 		os.Exit(1)
 	}
 
-	var args *ell.V
-	tail := &args
+	var args []ell.V
 	for i := 2; i < len(os.Args); i++ {
-		*tail = ell.NewString(os.Args[i])
-		tail = &(*tail).Next
+		args = append(args, *ell.NewString(os.Args[i]))
 	}
 
-	var result *ell.V
+	var result []ell.V
 	if !L.EvalBlock(program, args, &result) {
 		fmt.Printf("%s: %s\n", "runtime error", L.Error)
 	}

cmd/repl/main.go

@@ -28,8 +28,8 @@ import (
 	"janouch.name/ell/ell"
 )
 
-func run(L *ell.Ell, program *ell.V) {
-	var result *ell.V
+func run(L *ell.Ell, program []ell.V) {
+	var result []ell.V
 	if !L.EvalBlock(program, nil, &result) {
 		fmt.Printf("\x1b[31m%s: %s\x1b[0m\n", "runtime error", L.Error)
 		L.Error = ""
@@ -48,8 +48,8 @@ func complete(L *ell.Ell, line string, pos int) (
 		head, line = line[:lastSpace+1], line[lastSpace+1:]
 	}
 
-	for v := L.Globals; v != nil; v = v.Next {
-		name := v.Head.String
+	for _, v := range L.Globals {
+		name := v.List[0].String
 		if strings.HasPrefix(strings.ToLower(name), line) {
 			completions = append(completions, name)
 		}