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Fixes #542

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Clay Sweetser
2014-07-08 16:25:13 -04:00
parent 887a1ebe68
commit 27fdc5fe33
1 changed files with 4 additions and 0 deletions
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4
lib/system.nim
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@@ -2663,6 +2663,8 @@ when hostOS != "standalone":
proc `[]`*[Idx, T](a: array[Idx, T], x: TSlice[int]): seq[T] =
## slice operation for arrays. Negative indexes are **not** supported
## because the array might have negative bounds.
when low(a) < 0:
{.error: "Slicing for arrays with negative indices is unsupported.".}
var L = x.b - x.a + 1
newSeq(result, L)
for i in 0.. <L: result[i] = a[i + x.a]
@@ -2670,6 +2672,8 @@ proc `[]`*[Idx, T](a: array[Idx, T], x: TSlice[int]): seq[T] =
proc `[]=`*[Idx, T](a: var array[Idx, T], x: TSlice[int], b: openArray[T]) =
## slice assignment for arrays. Negative indexes are **not** supported
## because the array might have negative bounds.
when low(a) < 0:
{.error: "Slicing for arrays with negative indices is unsupported.".}
var L = x.b - x.a + 1
if L == b.len:
for i in 0 .. <L: a[i+x.a] = b[i]