25 lines
741 B
Dart
25 lines
741 B
Dart
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/// Holds a value of either [T] or [V].
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class Result<T, V> {
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/// Constructs a result. [_data] must be either of type [T] or [V].
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const Result(this._data)
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: assert(
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_data is T || _data is V,
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'Invalid data type $_data: Must be either $T or $V',
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);
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final dynamic _data;
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/// Returns true if the data contained within is of type [S]. If not, returns false.
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bool isType<S>() => _data is S;
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/// Returns the data contained within cast to [S]. Before doing this call, it's recommended
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/// to check isType<S>() first.
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S get<S>() {
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assert(_data is S, 'Data is not $S');
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return _data as S;
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}
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/// Returns the runtime type of the data.
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Object get dataRuntimeType => _data.runtimeType;
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}
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