From c2e3dc0ed16a854981769b426e9e327663447df7 Mon Sep 17 00:00:00 2001
From: flywind <xzsflywind@gmail.com>
Date: Wed, 2 Jun 2021 00:16:25 +0800
Subject: [PATCH] close #18129 Add setCurrentException for JS backend (#18145)

* [std/re] make interface consistent

* tiny

* revert

* close #18129  add setCurrentException

* changelog entry
---
 changelog.md                       | 2 +-
 lib/system/jssys.nim               | 3 +++
 tests/exception/tsetexceptions.nim | 8 ++++++++
 3 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 tests/exception/tsetexceptions.nim

diff --git a/changelog.md b/changelog.md
index 9806a6011..900b23ad8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -329,7 +329,7 @@
 
 - Fixed premature garbage collection in asyncdispatch, when a stack trace override is in place.
 
-
+- Added setCurrentException for JS backend.
 
 ## Language changes
 
diff --git a/lib/system/jssys.nim b/lib/system/jssys.nim
index ef06437e5..371cb7962 100644
--- a/lib/system/jssys.nim
+++ b/lib/system/jssys.nim
@@ -69,6 +69,9 @@ proc getCurrentExceptionMsg*(): string =
         return $msg
   return ""
 
+proc setCurrentException*(exc: ref Exception) =
+  lastJSError = cast[PJSError](exc)
+
 proc auxWriteStackTrace(f: PCallFrame): string =
   type
     TempFrame = tuple[procname: cstring, line: int, filename: cstring]
diff --git a/tests/exception/tsetexceptions.nim b/tests/exception/tsetexceptions.nim
new file mode 100644
index 000000000..557fc1898
--- /dev/null
+++ b/tests/exception/tsetexceptions.nim
@@ -0,0 +1,8 @@
+discard """
+  targets: "c cpp js"
+"""
+
+let ex = newException(CatchableError, "test")
+setCurrentException(ex)
+doAssert getCurrentException().msg == ex.msg
+doAssert getCurrentExceptionMsg() == ex.msg