Error Handling

// Run this example from the package root:
//   dart run example/error_handling_example.dart

// print() is fine in example scripts; avoid it in production code instead.
// ignore_for_file: avoid_print

import 'package:pdata/pdata.dart';

void main() {
  // 1. Reading a file that doesn't exist.
  try {
    pdataReadFile('build/does_not_exist.yaml');
  } on PdataFileNotFoundException catch (e) {
    print('Missing file: $e');
  }

  // 2. Malformed input for the format being parsed.
  try {
    decodeYaml('key: [unclosed');
  } on PdataParseException catch (e) {
    print('Bad YAML: $e');
  }

  try {
    decodeToml('key = ');
  } on PdataParseException catch (e) {
    print('Bad TOML: $e');
  }

  // 3. A value that can't be represented in the requested format — TOML
  //    has no `null`.
  try {
    encodeToml({'name': 'my-app', 'nickname': null});
  } on PdataFormatException catch (e) {
    print('Unrepresentable value: $e');
  }

  // 4. No extension to guess a format from, and none supplied.
  try {
    pdataWriteFile('build/config', {'a': 1});
  } on PdataFormatException catch (e) {
    print('Unknown format: $e');
  }

  // Passing `format:` explicitly sidesteps extension guessing entirely.
  pdataWriteFile('build/config', {'a': 1}, format: PdataFormat.json);
  print('\nWrote build/config as JSON by passing `format:` explicitly.');
}

dart run example/error_handling_example.dart