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SliceMem: change newSliceMem(ptr, len...) to match an example, add another.

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This commit is contained in:
Alberto Torres 2024-09-10 00:52:39 +02:00
parent dd75d19399
commit 90abbac26b
1 changed files with 11 additions and 5 deletions
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16
libs/arr_ref/slice_mem.nim
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@ -35,7 +35,8 @@ proc newSliceMem*[T, U](container: sink U; p: pointer, byte_len: int): SliceMem[
## Create a SliceMem from a container, a pointer, and a length in bytes.
runnableExamples:
let x = @[1,2,3,4,5]
let s = newSliceMem(x, x[0].addr, x.len * sizeof(x[0]))
# You can omit the [int] here because the container is iterable
let s = newSliceMem[int](x, x[0].addr, x.len * sizeof(x[0]))
result = SliceMem[T](
data: cast[ptr UncheckedArray[T]](p),
@ -48,9 +49,9 @@ proc newSliceMem*[T, U](container: sink U; p: pointer, byte_len: int): SliceMem[
),
)
proc newSliceMem*[T](p: ptr T, byte_len: int, destructor: proc() {.closure, raises: [].}): SliceMem[T] =
## Create a SliceMem from a pointer to a type, a length in bytes, and a
## destructor closure.
proc newSliceMem*[T](p: ptr T, len: int, destructor: proc() {.closure, raises: [].}): SliceMem[T] =
# Create a SliceMem from a pointer to a type, a length, and a destructor
# closure.
runnableExamples:
let x = createShared(int, 5)
proc destroy() = deallocShared(x)
@ -58,7 +59,7 @@ proc newSliceMem*[T](p: ptr T, byte_len: int, destructor: proc() {.closure, rais
result = SliceMem[T](
data: cast[ptr UncheckedArray[T]](p),
byte_len: byte_len,
byte_len: len * sizeof(T),
destroy_ref: (ref CustomDestructor)(destroy: destructor),
)
@ -85,6 +86,11 @@ proc newSliceMem*[T, U](container: sink U; first, last: pointer): SliceMem[T] =
proc newSliceMem*[T](size: int): SliceMem[T] =
## Create a SliceMem from new memory, similar to ArrRef[T].
runnableExamples:
let s = newSliceMem[int](10)
for i,n in s.mpairs:
n = (i+1)*11
doAssert $s == "SliceMem([11, 22, 33, 44, 55, 66, 77, 88, 99, 110])"
var r: ref byte
unsafeNew(r, size * sizeof(T))
result = SliceMem[T](