I am revoking this old question but I would like to know if protobuf can
handle class templates?
Suppose I have a simple class
template<typename T>
struct Data {
T data;
};
and know that T can only take on float and double. Is there a way to avoid
writing two proto files?
On Wednesday, January 21, 2015 at 9:28:53 AM UTC-8, Stephen Tu wrote:
>
> This is not really a protobuf question, moreso a C++ question. But
> anyways, the typical way to do this is:
>
> template <typename T> struct MatrixTraits { };
> template <> struct MatrixTraits<double> { typedef DoubleMatrix type; };
> template <> struct MatrixTraits<float> { typedef FloatMatrix type; };
>
> template <typename DType> class Matrix {
> typename MatrixTraits<DType>::type mat_data_;
> };
>
> On Mon, Jan 19, 2015 at 5:41 PM, Ji Wan <[email protected] <javascript:>>
> wrote:
>
>> Suppose I have two message types `DoubleMatrix` and `FloatMatrix`, and a
>> template class `Matrix`:
>>
>>
>> message DoubleMatrix {
>> required uint32 rows = 1;
>> required uint32 cols = 2;
>> repeated double data = 3 [packed=true];
>> }
>>
>>
>> message FloatMatrix {
>> required uint32 rows = 1;
>> required uint32 cols = 2;
>> repeated float data = 3 [packed=true];
>> }
>>
>>
>> template<typename DType>
>> class Matrix {
>> MSTType mat_data_;
>> };
>>
>>
>>
>> Is it possible to make `MSTType` as `FloatMatrix` if `DType` is `float`, as
>> `DoubleMatrix` if `DType` is `double`?
>>
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>
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