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more arc features (#13098)

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* config update
* ARC now supports 'repr' and 'new' with finalizers is supported
This commit is contained in:
Andreas Rumpf 2020-01-10 23:17:33 +01:00 • committed by GitHub
commit 767592a3c3
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7 changed files with 252 additions and 13 deletions
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31
lib/system.nim
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@ -250,7 +250,7 @@ const ThisIsSystem = true
proc internalNew*[T](a: var ref T) {.magic: "New", noSideEffect.}
## Leaked implementation detail. Do not use.
when not defined(gcDestructors):
when true:
proc new*[T](a: var ref T, finalizer: proc (x: ref T) {.nimcall.}) {.
magic: "NewFinalize", noSideEffect.}
## Creates a new object of type ``T`` and returns a safe (traced)
@ -2197,17 +2197,18 @@ proc insert*[T](x: var seq[T], item: T, i = 0.Natural) {.noSideEffect.} =
defaultImpl()
x[i] = item
proc repr*[T](x: T): string {.magic: "Repr", noSideEffect.}
## Takes any Nim variable and returns its string representation.
##
## It works even for complex data graphs with cycles. This is a great
## debugging tool.
##
## .. code-block:: Nim
## var s: seq[string] = @["test2", "test2"]
## var i = @[1, 2, 3, 4, 5]
## echo repr(s) # => 0x1055eb050[0x1055ec050"test2", 0x1055ec078"test2"]
## echo repr(i) # => 0x1055ed050[1, 2, 3, 4, 5]
when not defined(nimV2):
proc repr*[T](x: T): string {.magic: "Repr", noSideEffect.}
## Takes any Nim variable and returns its string representation.
##
## It works even for complex data graphs with cycles. This is a great
## debugging tool.
##
## .. code-block:: Nim
## var s: seq[string] = @["test2", "test2"]
## var i = @[1, 2, 3, 4, 5]
## echo repr(s) # => 0x1055eb050[0x1055ec050"test2", 0x1055ec078"test2"]
## echo repr(i) # => 0x1055ed050[1, 2, 3, 4, 5]
type
ByteAddress* = int
@ -3555,6 +3556,9 @@ template unlikely*(val: bool): bool =
import system/dollars
export dollars
when defined(nimV2):
import system/repr_v2
export repr_v2
const
NimMajor* {.intdefine.}: int = 1
@ -4218,6 +4222,9 @@ type
NimNode* {.magic: "PNimrodNode".} = ref NimNodeObj
## Represents a Nim AST node. Macros operate on this type.
when defined(nimV2):
proc repr*(x: NimNode): string {.magic: "Repr", noSideEffect.}
macro lenVarargs*(x: varargs[untyped]): int {.since: (1, 1).} =
## returns number of variadic arguments in `x`
proc lenVarargsImpl(x: NimNode): NimNode {.magic: "LengthOpenArray", noSideEffect.}