Re: qvm: return type for mixed scalar type vector operations

From: Emil Dotchevski (emildotchevski_at_[hidden])
Date: 2020-12-07 20:29:40

See deduce_vec2 (https://boostorg.github.io/qvm/#deduce_vec2): this
template is used by QVM whenever it needs to deduce a vector type of
certain dimension from the types of two user-supplied function parameters
(there is also deduce_vec, which is used by unary operations).

If you don't care about the resulting vector type but only about its scalar
type, you can specialize deduce_scalar instead (
https://boostorg.github.io/qvm/#deduce_scalar), which is used by
deduce_vec2 by default.

On Mon, Dec 7, 2020 at 8:58 AM Kai Szuttor via Boost <boost_at_[hidden]>
wrote:

> Hey all,
>
> concerning vector operations in boost qvm,
> is it possible to somehow specify the return type of a binary operator
> with mixed scalar input data, e.g.
>
> operator+(vec<double, 3>, vec<int, 3>)
>
> ?
>
> Could not find the customisation point to do this depending on the
> involved operation.
>
> Thanks in advance,
>
> Kai
>
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