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fix nim-lang#18410 (Errors initializing an object of RootObj with the…
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… C++ backend) [backport] (nim-lang#18836)

* fix nim-lang#18410

* one line comment

* typo

* typo

* cover cpp
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ringabout authored and PMunch committed Mar 28, 2022
1 parent 65cc102 commit cc665a8
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Showing 3 changed files with 19 additions and 2 deletions.
3 changes: 2 additions & 1 deletion compiler/cgen.nim
Original file line number Diff line number Diff line change
Expand Up @@ -363,7 +363,8 @@ proc genObjectInit(p: BProc, section: TCProcSection, t: PType, a: var TLoc,
else:
linefmt(p, section, "$1.m_type = $2;$n", [r, genTypeInfoV1(p.module, t, a.lode.info)])
of frEmbedded:
if optTinyRtti in p.config.globalOptions:
# inheritance in C++ does not allow struct initialization: bug #18410
if not p.module.compileToCpp and optTinyRtti in p.config.globalOptions:
var tmp: TLoc
if mode == constructRefObj:
let objType = t.skipTypes(abstractInst+{tyRef})
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3 changes: 2 additions & 1 deletion tests/arc/tconst_to_sink.nim
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
discard """
output: '''@[(s1: "333", s2: ""), (s1: "abc", s2: "def"), (s1: "3x", s2: ""), (s1: "3x", s2: ""), (s1: "3x", s2: ""), (s1: "3x", s2: ""), (s1: "lastone", s2: "")]'''
cmd: "nim c --gc:arc $file"
matrix: "--gc:arc"
targets: "c cpp"
"""

# bug #13240
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15 changes: 15 additions & 0 deletions tests/cpp/torc.nim
Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
discard """
targets: "cpp"
matrix: "--gc:orc"
"""

import std/options

# bug #18410
type
O = object of RootObj
val: pointer

proc p(): Option[O] = none(O)

doAssert $p() == "none(O)"

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