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init checks and 'out' parameters (#14521)

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* I don't care about observable stores
* enforce explicit initializations
* cleaner code for the stdlib
* stdlib: use explicit initializations
* make tests green
* algorithm.nim: set result explicitly
* remove out parameters and bring the PR into a mergable state
* updated the changelog
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Andreas Rumpf 2020-06-23 10:53:57 +02:00 • committed by GitHub
commit da29222f86
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53 changed files with 355 additions and 257 deletions
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compiler/parser.nim
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@ -793,7 +793,7 @@ proc primarySuffix(p: var TParser, r: PNode,
break
result = namedParams(p, result, nkCurlyExpr, tkCurlyRi)
of tkSymbol, tkAccent, tkIntLit..tkCharLit, tkNil, tkCast,
tkOpr, tkDotDot, tkVar, tkStatic, tkType, tkEnum, tkTuple,
tkOpr, tkDotDot, tkVar, tkOut, tkStatic, tkType, tkEnum, tkTuple,
tkObject, tkProc:
# XXX: In type sections we allow the free application of the
# command syntax, with the exception of expressions such as
@ -1300,6 +1300,10 @@ proc primary(p: var TParser, mode: TPrimaryMode): PNode =
optInd(p, result)
result.add(primary(p, pmNormal))
of tkVar: result = parseTypeDescKAux(p, nkVarTy, mode)
of tkOut:
# I like this parser extension to be in 1.4 as it still might turn out
# useful in the long run.
result = parseTypeDescKAux(p, nkMutableTy, mode)
of tkRef: result = parseTypeDescKAux(p, nkRefTy, mode)
of tkPtr: result = parseTypeDescKAux(p, nkPtrTy, mode)
of tkDistinct: result = parseTypeDescKAux(p, nkDistinctTy, mode)