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implemented strictCaseObjects (#20608)

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* implemented strictCaseObjects

* changelog update
This commit is contained in:
Andreas Rumpf 2022-10-21 06:55:52 +02:00 • committed by GitHub
commit 76763f51aa
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6 changed files with 80 additions and 8 deletions
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8
compiler/guards.nim
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@ -1054,8 +1054,12 @@ proc buildProperFieldCheck(access, check: PNode; o: Operators): PNode =
assert check.getMagic == mNot
result = buildProperFieldCheck(access, check[1], o).neg(o)
proc checkFieldAccess*(m: TModel, n: PNode; conf: ConfigRef) =
proc checkFieldAccess*(m: TModel, n: PNode; conf: ConfigRef; produceError: bool) =
for i in 1..<n.len:
let check = buildProperFieldCheck(n[0], n[i], m.g.operators)
if check != nil and m.doesImply(check) != impYes:
message(conf, n.info, warnProveField, renderTree(n[0])); break
if produceError:
localError(conf, n.info, "field access outside of valid case branch: " & renderTree(n[0]))
else:
message(conf, n.info, warnProveField, renderTree(n[0]))
break