static Optional<DocComment *>
getAnyBaseClassDocComment(swift::markup::MarkupContext &MC,
const ClassDecl *CD,
const Decl *D) {
RawComment RC;
if (const auto *VD = dyn_cast<ValueDecl>(D)) {
const auto *BaseDecl = VD->getOverriddenDecl();
while (BaseDecl) {
RC = BaseDecl->getRawComment();
if (!RC.isEmpty()) {
swift::markup::LineList LL = MC.getLineList(RC);
auto *Doc = swift::markup::parseDocument(MC, LL);
auto Parts = extractCommentParts(MC, Doc);
SmallString<48> RawCascadeText;
llvm::raw_svector_ostream OS(RawCascadeText);
OS << "This documentation comment was inherited from ";
auto *Text = swift::markup::Text::create(MC, MC.allocateCopy(OS.str()));
auto BaseClass =
BaseDecl->getDeclContext()->getAsClassOrClassExtensionContext();
auto *BaseClassMonospace =
swift::markup::Code::create(MC,
MC.allocateCopy(BaseClass->getNameStr()));
auto *Period = swift::markup::Text::create(MC, ".");
auto *Para = swift::markup::Paragraph::create(MC, {
Text, BaseClassMonospace, Period
});
auto CascadeNote = swift::markup::NoteField::create(MC, {Para});
SmallVector<const swift::markup::MarkupASTNode *, 8> BodyNodes {
Parts.BodyNodes.begin(),
Parts.BodyNodes.end()
};
BodyNodes.push_back(CascadeNote);
Parts.BodyNodes = MC.allocateCopy(llvm::makeArrayRef(BodyNodes));
return new (MC) DocComment(D, Doc, Parts);
}
BaseDecl = BaseDecl->getOverriddenDecl();
}
}
return None;
}
static swift::markup::CommentParts
extractCommentParts(swift::markup::MarkupContext &MC,
swift::markup::MarkupASTNode *Node) {
swift::markup::CommentParts Parts;
auto Children = Node->getChildren();
if (Children.empty())
return Parts;
auto FirstParagraph
= dyn_cast<swift::markup::Paragraph>(Node->getChildren().front());
if (FirstParagraph)
Parts.Brief = FirstParagraph;
SmallVector<const swift::markup::MarkupASTNode *, 4> BodyNodes;
SmallVector<swift::markup::ParamField *, 8> ParamFields;
// Look for special top-level lists
size_t StartOffset = FirstParagraph == nullptr ? 0 : 1;
for (auto C = Children.begin() + StartOffset; C != Children.end(); ++C) {
if (auto L = dyn_cast<swift::markup::List>(*C)) {
// Could be one of the following:
// 1. A parameter outline:
// - Parameters:
// - x: ...
// - y: ...
// 2. An exploded parameter list:
// - parameter x: ...
// - parameter y: ...
// 3. Some other simple field, including "returns" (see SimpleFields.def)
auto ListNowEmpty = extractParameterOutline(MC, L, ParamFields);
ListNowEmpty |= extractSeparatedParams(MC, L, ParamFields);
ListNowEmpty |= extractSimpleField(MC, L, Parts, BodyNodes);
if (ListNowEmpty)
continue; // This drops the empty list from the doc comment body.
}
BodyNodes.push_back(*C);
}
// Copy BodyNodes and ParamFields into the MarkupContext.
Parts.BodyNodes = MC.allocateCopy(llvm::makeArrayRef(BodyNodes));
Parts.ParamFields = MC.allocateCopy(llvm::makeArrayRef(ParamFields));
for (auto Param : Parts.ParamFields) {
auto ParamParts = extractCommentParts(MC, Param);
Param->setParts(ParamParts);
}
return Parts;
}
bool extractSimpleField(
swift::markup::MarkupContext &MC, swift::markup::List *L,
swift::markup::CommentParts &Parts,
SmallVectorImpl<const swift::markup::MarkupASTNode *> &BodyNodes) {
auto Children = L->getChildren();
SmallVector<swift::markup::MarkupASTNode *, 8> NormalItems;
for (auto Child : Children) {
auto I = dyn_cast<swift::markup::Item>(Child);
if (!I) {
NormalItems.push_back(Child);
continue;
}
auto ItemChildren = I->getChildren();
if (ItemChildren.empty()) {
NormalItems.push_back(Child);
continue;
}
auto FirstParagraph
= dyn_cast<swift::markup::Paragraph>(ItemChildren.front());
if (!FirstParagraph) {
NormalItems.push_back(Child);
continue;
}
auto ParagraphChildren = FirstParagraph->getChildren();
if (ParagraphChildren.empty()) {
NormalItems.push_back(Child);
continue;
}
auto ParagraphText
= dyn_cast<swift::markup::Text>(ParagraphChildren.front());
if (!ParagraphText) {
NormalItems.push_back(Child);
continue;
}
StringRef Tag;
StringRef Remainder;
std::tie(Tag, Remainder) = ParagraphText->getLiteralContent().split(':');
Tag = Tag.ltrim().rtrim();
Remainder = Remainder.ltrim();
if (!swift::markup::isAFieldTag(Tag)) {
NormalItems.push_back(Child);
continue;
}
ParagraphText->setLiteralContent(Remainder);
auto Field = swift::markup::createSimpleField(MC, Tag, ItemChildren);
if (auto RF = dyn_cast<swift::markup::ReturnsField>(Field)) {
Parts.ReturnsField = RF;
} else if (auto TF = dyn_cast<swift::markup::ThrowsField>(Field)) {
Parts.ThrowsField = TF;
} else if (auto TF = dyn_cast<swift::markup::TagField>(Field)) {
llvm::SmallString<64> Scratch;
llvm::raw_svector_ostream OS(Scratch);
printInlinesUnder(TF, OS);
Parts.Tags.insert(MC.allocateCopy(OS.str()));
} else if (auto LKF = dyn_cast<markup::LocalizationKeyField>(Field)) {
Parts.LocalizationKeyField = LKF;
} else {
BodyNodes.push_back(Field);
}
}
if (NormalItems.size() != Children.size())
L->setChildren(NormalItems);
return NormalItems.empty();
}