Matrix.setRect

struct Matrix(size_t H, size_t W, E)
pure ref
typeof(this)
setRect
(
size_t bH
size_t bW
X
)
(
size_t pos_row
,
size_t pos_col
,
in Matrix!(bH, bW, X) mtr
)
if (
is(typeof(E(X.init)))
)

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