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Merge pull request #1396 from PavelVozenilek/patch-5

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replaced few var with let in system.nim
This commit is contained in:
Andreas Rumpf 2014-07-22 20:12:53 +02:00
commit 5c52a5649e
1 changed files with 4 additions and 4 deletions
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lib/system.nim
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@ -1052,7 +1052,7 @@ proc add *[T](x: var seq[T], y: openArray[T]) {.noSideEffect.} =
## containers should also call their adding proc `add` for consistency. ## containers should also call their adding proc `add` for consistency.
## Generic code becomes much easier to write if the Nimrod naming scheme is ## Generic code becomes much easier to write if the Nimrod naming scheme is
## respected. ## respected.
var xl = x.len let xl = x.len
setLen(x, xl + y.len) setLen(x, xl + y.len)
for i in 0..high(y): x[xl+i] = y[i] for i in 0..high(y): x[xl+i] = y[i]
@ -1066,20 +1066,20 @@ proc shallowCopy*[T](x: var T, y: T) {.noSideEffect, magic: "ShallowCopy".}
proc del*[T](x: var seq[T], i: int) {.noSideEffect.} = proc del*[T](x: var seq[T], i: int) {.noSideEffect.} =
## deletes the item at index `i` by putting ``x[high(x)]`` into position `i`. ## deletes the item at index `i` by putting ``x[high(x)]`` into position `i`.
## This is an O(1) operation. ## This is an O(1) operation.
var xl = x.len let xl = x.len
shallowCopy(x[i], x[xl-1]) shallowCopy(x[i], x[xl-1])
setLen(x, xl-1) setLen(x, xl-1)
proc delete*[T](x: var seq[T], i: int) {.noSideEffect.} = proc delete*[T](x: var seq[T], i: int) {.noSideEffect.} =
## deletes the item at index `i` by moving ``x[i+1..]`` by one position. ## deletes the item at index `i` by moving ``x[i+1..]`` by one position.
## This is an O(n) operation. ## This is an O(n) operation.
var xl = x.len let xl = x.len
for j in i..xl-2: shallowCopy(x[j], x[j+1]) for j in i..xl-2: shallowCopy(x[j], x[j+1])
setLen(x, xl-1) setLen(x, xl-1)
proc insert*[T](x: var seq[T], item: T, i = 0) {.noSideEffect.} = proc insert*[T](x: var seq[T], item: T, i = 0) {.noSideEffect.} =
## inserts `item` into `x` at position `i`. ## inserts `item` into `x` at position `i`.
var xl = x.len let xl = x.len
setLen(x, xl+1) setLen(x, xl+1)
var j = xl-1 var j = xl-1
while j >= i: while j >= i: