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Added help command

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This commit is contained in:
Leon Mika 2024-12-11 21:16:08 +11:00
parent 5b4e45ff80
commit e0db900e4e
4 changed files with 120 additions and 28 deletions
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12
repl/evaldisplay.go
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@ -7,6 +7,8 @@ import (
"ucl.lmika.dev/ucl"
)
type NoResults struct{}
func (r *REPL) EvalAndDisplay(ctx context.Context, expr string) error {
res, err := r.inst.Eval(ctx, expr)
if err != nil {
@ -18,20 +20,26 @@ func (r *REPL) EvalAndDisplay(ctx context.Context, expr string) error {
func displayResult(ctx context.Context, inst *ucl.Inst, res any) (err error) {
switch v := res.(type) {
case NoResults:
return nil
case nil:
if _, err = fmt.Fprintln(os.Stdout, "(nil)"); err != nil {
return err
}
case listable:
case ucl.Listable:
for i := 0; i < v.Len(); i++ {
if err = displayResult(ctx, inst, v.Index(i)); err != nil {
return err
}
}
default:
case ucl.Object:
if _, err = fmt.Fprintln(os.Stdout, v.String()); err != nil {
return err
}
default:
if _, err = fmt.Fprintln(os.Stdout, v); err != nil {
return err
}
}
return nil
}