Like how, specifically?
func (m *Matrix[float64]) NanToZero() {
for i := 0; i < m.Nrow; i++ {
for j := 0; j < m.Ncol; j++ {
v := m.At(i, j).(float64)
if math.IsNaN(v) {
m.Set(i, j, 0)
}
}
}
}
gives
./slurp1.go:944:9: invalid operation: cannot use type assertion on type
parameter value m.At(i, j) (value of type float64 constrained by Addable)
On Sunday, September 10, 2023 at 12:04:53 AM UTC+1 Dan Kortschak wrote:
> On Sat, 2023-09-09 at 15:39 -0700, Jason E. Aten wrote:
> > New to generics... how can I write a method for a Matrix[float64]
> > that uses a math function that expects a float64? I get:
> >
> > ./slurp1.go:936:18: cannot use m.At(i, j) (value of type float64
> > constrained by Addable) as float64 value in argument to math.IsNaN
> >
> > Casting it to float64() does not change this error(!)
> >
> > here is the essentials:
> >
> > type Addable interface {
> > ~complex128 | ~complex64 | ~float64 | ~float32 |
> > ~byte | ~uint16 | ~uint32 | ~uint64 |
> > ~int8 | ~int16 | ~int32 | ~int64 | ~int
> > }
> >
> > type Matrix[T Addable] struct {
> > Nrow int
> > Ncol int
> > Dat []T
> > }
> > ...
> > func (m *Matrix[float64]) NanToZero() {
> > for i := 0; i < m.Nrow; i++ {
> > for j := 0; j < m.Ncol; j++ {
> >
> > if math.IsNaN(m.At(i, j)) { // line 936, where the error
> > is; ./slurp1.go:936:18: cannot use m.At(i, j) (value of type float64
> > constrained by Addable) as float64 value in argument to math.IsNaN
> >
> > m.Set(i, j, 0)
> > }
> > }
> > }
> > }
> >
> > go version go1.20.6 linux/amd64
>
> You will probably need to type assert.
>
>
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