38 lines
696 B
Go
38 lines
696 B
Go
package repl
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import (
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"context"
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"fmt"
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"os"
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"ucl.lmika.dev/ucl"
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)
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func (r *REPL) EvalAndDisplay(ctx context.Context, expr string) error {
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res, err := r.inst.Eval(ctx, expr)
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if err != nil {
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return err
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}
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return displayResult(ctx, r.inst, res)
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}
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func displayResult(ctx context.Context, inst *ucl.Inst, res any) (err error) {
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switch v := res.(type) {
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case nil:
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if _, err = fmt.Fprintln(os.Stdout, "(nil)"); err != nil {
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return err
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}
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case listable:
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for i := 0; i < v.Len(); i++ {
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if err = displayResult(ctx, inst, v.Index(i)); err != nil {
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return err
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}
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}
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default:
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if _, err = fmt.Fprintln(os.Stdout, v.String()); err != nil {
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return err
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}
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}
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return nil
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}
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