platform/graphql_parser/lib/src/language/syntax_error.dart

import 'package:source_span/source_span.dart';

class SyntaxError implements Exception {
  final String message;
  final FileSpan span;

  SyntaxError(this.message, this.span);

  @override
  String toString() =>
      'Syntax error at ${span.start.toolString}: $message\n${span.highlight()}';
}