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--gc:destructors: next steps; WIP

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This commit is contained in:
Andreas Rumpf 2018-07-21 13:16:53 +02:00
commit f485ebe162
8 changed files with 108 additions and 64 deletions
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14
lib/system.nim
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@ -1519,7 +1519,13 @@ when not defined(JS) and not defined(nimscript) and hostOS != "standalone":
when not defined(JS) and not defined(nimscript) and hasAlloc and not defined(gcDestructors):
proc addChar(s: NimString, c: char): NimString {.compilerProc, benign.}
proc add*[T](x: var seq[T], y: T) {.magic: "AppendSeqElem", noSideEffect.}
when defined(gcDestructors):
proc add*[T](x: var seq[T], y: sink T) {.magic: "AppendSeqElem", noSideEffect.} =
let xl = x.len
setLen(x, xl + 1)
x[xl] = y
else:
proc add*[T](x: var seq[T], y: T) {.magic: "AppendSeqElem", noSideEffect.}
proc add*[T](x: var seq[T], y: openArray[T]) {.noSideEffect.} =
## Generic proc for adding a data item `y` to a container `x`.
## For containers that have an order, `add` means *append*. New generic
@ -3856,7 +3862,7 @@ proc shallow*(s: var string) {.noSideEffect, inline.} =
## marks a string `s` as `shallow`:idx:. Subsequent assignments will not
## perform deep copies of `s`. This is only useful for optimization
## purposes.
when not defined(JS) and not defined(nimscript):
when not defined(JS) and not defined(nimscript) and not defined(gcDestructors):
var s = cast[PGenericSeq](s)
# string literals cannot become 'shallow':
if (s.reserved and strlitFlag) == 0:
@ -4031,7 +4037,9 @@ proc locals*(): RootObj {.magic: "Plugin", noSideEffect.} =
## # -> B is 1
discard
when hasAlloc and not defined(nimscript) and not defined(JS):
when hasAlloc and not defined(nimscript) and not defined(JS) and
not defined(gcDestructors):
# XXX how to implement 'deepCopy' is an open problem.
proc deepCopy*[T](x: var T, y: T) {.noSideEffect, magic: "DeepCopy".} =
## performs a deep copy of `y` and copies it into `x`.
## This is also used by the code generator