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Verify that a GenericTypeParamDecl's depth and index are correct #20100

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Merged
merged 1 commit into from
Nov 7, 2018
Merged

Verify that a GenericTypeParamDecl's depth and index are correct #20100

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31 changes: 31 additions & 0 deletions lib/AST/ASTVerifier.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2715,6 +2715,37 @@ class Verifier : public ASTWalker {
verifyCheckedBase(nominal);
}

void verifyCheckedAlways(GenericTypeParamDecl *GTPD) {
PrettyStackTraceDecl debugStack("verifying GenericTypeParamDecl", GTPD);

const DeclContext *DC = GTPD->getDeclContext();
if (!GTPD->getDeclContext()->isInnermostContextGeneric()) {
Out << "DeclContext of GenericTypeParamDecl does not have "
"generic params";
abort();
}

GenericParamList *paramList =
static_cast<const GenericContext *>(DC)->getGenericParams();
if (!paramList) {
Out << "DeclContext of GenericTypeParamDecl does not have "
"generic params";
abort();
}

if (paramList->size() <= GTPD->getIndex() ||
paramList->getParams()[GTPD->getIndex()] != GTPD) {
Out << "GenericTypeParamDecl has incorrect index";
abort();
}
if (paramList->getDepth() != GTPD->getDepth()) {
Out << "GenericTypeParamDecl has incorrect depth";
abort();
}

verifyCheckedBase(GTPD);
}

void verifyChecked(ExtensionDecl *ext) {
// Make sure that the protocol conformances are complete.
for (auto conformance : ext->getLocalConformances()) {
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