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feature: the compiler can warn when you use the implicit 'result' variable (#17988) [backport:1.2]

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* implements #17855
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Andreas Rumpf 2021-05-10 23:41:51 +02:00 • committed by GitHub
commit 378ee7f888
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3 changed files with 7 additions and 2 deletions
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compiler/semexprs.nim
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@ -1246,6 +1246,9 @@ proc semSym(c: PContext, n: PNode, sym: PSym, flags: TExprFlags): PNode =
# not sure the symbol really ends up being used:
# var len = 0 # but won't be called
# genericThatUsesLen(x) # marked as taking a closure?
if hasWarn(c.config, warnResultUsed):
message(c.config, n.info, warnResultUsed)
of skGenericParam:
onUse(n.info, s)
if s.typ.kind == tyStatic: