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add default field support for object in ARC/ORC (#20480)

Browse source 
* fresh start

* add cpp target

* add result support

* add nimPreviewRangeDefault

* reduce

* use orc

* refactor common parts

* add tuple support

* add testcase for tuple

* cleanup; fixes nimsuggest tests

* there is something wrong with cpp

* remove

* add support for seqs

* fixes style

* addd initial distinct support

* remove links

* typo

* fixes tuple defaults

* add rangedefault

* add cpp support

* fixes one more bugs

* add more hasDefaults

* fixes ordinal types

* add testcase for #16744

* add testcase for #3608

* fixes docgen

* small fix

* recursive

* fixes

* cleanup and remove tuple support

* fixes nimsuggest

* fixes generics procs

* refactor

* increases timeout

* refactor hasDefault

* zero default; disable i386

* add tuples back

* fixes bugs

* fixes tuple

* add more tests

* fix one more bug regarding tuples

* more tests and cleanup

* remove messy distinct types which must be initialized by original types

* add tests

* fixes zero default

* fixes grammar

* fixes tests

* fixes tests

* fixes tests

* fixes comments

* fixes and add testcase

* undo default values for results

Co-authored-by: flywind <43030857+xflywind@users.noreply.github.com>
This commit is contained in:
ringabout 2022-10-04 18:45:10 +08:00 • committed by GitHub
commit f89ba2c951
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23 changed files with 727 additions and 80 deletions
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9
lib/system.nim
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@ -24,6 +24,9 @@
include "system/basic_types"
func zeroDefault*[T](_: typedesc[T]): T {.magic: "ZeroDefault".} =
## returns the default value of the type `T`.
include "system/compilation"
{.push warning[GcMem]: off, warning[Uninit]: off.}
@ -911,6 +914,7 @@ proc default*[T](_: typedesc[T]): T {.magic: "Default", noSideEffect.} =
# note: the doc comment also explains why `default` can't be implemented
# via: `template default*[T](t: typedesc[T]): T = (var v: T; v)`
proc reset*[T](obj: var T) {.noSideEffect.} =
## Resets an object `obj` to its default value.
obj = default(typeof(obj))
@ -2753,3 +2757,8 @@ when notJSnotNims and not defined(nimSeqsV2):
moveMem(addr y[0], addr x[0], x.len)
assert y == "abcgh"
discard
proc arrayWith*[T](y: T, size: static int): array[size, T] {.noinit.} = # ? exempt from default value for result
## Creates a new array filled with `y`.
for i in 0..size-1:
result[i] = y