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catchable defects (#13626)

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* allow defects to be caught even for --exceptions:goto (WIP)
* implemented the new --panics:on|off switch; refs https://github.com/nim-lang/RFCs/issues/180
* new implementation for integer overflow checking
* produce a warning if a user-defined exception type inherits from Exception directly
* applied Timothee's suggestions; improved the documentation and replace the term 'checked runtime check' by 'panic'
* fixes #13627
* don't inherit from Exception directly
This commit is contained in:
Andreas Rumpf 2020-03-12 23:44:33 +01:00 • committed by GitHub
commit a6682de004
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35 changed files with 441 additions and 142 deletions
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compiler/enumtostr.nim
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@ -40,6 +40,7 @@ proc genEnumToStrProc*(t: PType; info: TLineInfo; g: ModuleGraph): PSym =
n[resultPos] = newSymNode(res)
result.ast = n
incl result.flags, sfFromGeneric
incl result.flags, sfAlwaysReturn
proc searchObjCaseImpl(obj: PNode; field: PSym): PNode =
case obj.kind
@ -101,3 +102,4 @@ proc genCaseObjDiscMapping*(t: PType; field: PSym; info: TLineInfo; g: ModuleGra
n[resultPos] = newSymNode(res)
result.ast = n
incl result.flags, sfFromGeneric
incl result.flags, sfAlwaysReturn