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Cleaning up anchor finding in interpolated strings #41723

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Merged
merged 1 commit into from
Mar 9, 2022
Merged

Cleaning up anchor finding in interpolated strings #41723

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18 changes: 4 additions & 14 deletions lib/Sema/TypeCheckEffects.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2071,7 +2071,8 @@ class CheckEffectsCoverage : public EffectsHandlingWalker<CheckEffectsCoverage>
llvm::DenseMap<Expr *, Expr *> parentMap;

static bool isEffectAnchor(Expr *e) {
return isa<AbstractClosureExpr>(e) || isa<DiscardAssignmentExpr>(e) || isa<AssignExpr>(e);
return isa<AbstractClosureExpr>(e) || isa<DiscardAssignmentExpr>(e) ||
isa<AssignExpr>(e);
}

static bool isAnchorTooEarly(Expr *e) {
Expand All @@ -2091,24 +2092,13 @@ class CheckEffectsCoverage : public EffectsHandlingWalker<CheckEffectsCoverage>
if (parent && !isAnchorTooEarly(parent)) {
return parent;
}

if (isInterpolatedString) {
// TODO: I'm being gentle with the casts to avoid breaking things
// If we see incorrect fix-it locations in string interpolations
// we need to change how this behaves
// Assert builds will crash giving us a bug to fix, non-asserts will
// quietly "just work".
assert(parent == nullptr && "Expected to be at top of expression");
assert(isa<CallExpr>(lastParent) &&
"Expected top of string interpolation to be CalExpr");
assert(cast<CallExpr>(lastParent)->getArgs()->isUnlabeledUnary() &&
"Expected unary arg in string interpolation call");
if (auto *callExpr = dyn_cast<CallExpr>(lastParent)) {
if (auto *unaryArg = callExpr->getArgs()->getUnlabeledUnaryExpr())
if (ArgumentList *args = lastParent->getArgs()) {
if (Expr *unaryArg = args->getUnlabeledUnaryExpr())
return unaryArg;
}
}

return lastParent;
}

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