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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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4
compiler/commands.nim
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@ -881,6 +881,10 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
processOnOffSwitchG(conf, {optBenchmarkVM}, arg, pass, info)
of "sinkinference":
processOnOffSwitch(conf, {optSinkInference}, arg, pass, info)
of "panics":
processOnOffSwitchG(conf, {optPanics}, arg, pass, info)
if optPanics in conf.globalOptions:
defineSymbol(conf.symbols, "nimPanics")
of "": # comes from "-" in for example: `nim c -r -` (gets stripped from -)
handleStdinInput(conf)
else: