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mat: disallow New calls with zero length

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This commit is contained in:
Dan Kortschak
2018-11-20 17:35:34 +10:30
committed by Dan Kortschak
parent d41320af1e
commit 3b99883391
11 changed files with 60 additions and 17 deletions
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6
mat/triangular.go
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@@ -111,12 +111,16 @@ func (t TransposeTri) UntransposeTri() Triangular {
// a new slice is allocated for the backing slice. If len(data) == n*n, data is
// used as the backing slice, and changes to the elements of the returned TriDense
// will be reflected in data. If neither of these is true, NewTriDense will panic.
// NewTriDense will panic if n is zero.
//
// The data must be arranged in row-major order, i.e. the (i*c + j)-th
// element in the data slice is the {i, j}-th element in the matrix.
// Only the values in the triangular portion corresponding to kind are used.
func NewTriDense(n int, kind TriKind, data []float64) *TriDense {
if n < 0 {
if n <= 0 {
if n == 0 {
panic(ErrZeroLength)
}
panic("mat: negative dimension")
}
if data != nil && len(data) != n*n {