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[libSyntax] Only keep track of range in ParsedRawSyntaxNode if verifying element ranges

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This makes ParsedRawSyntaxNode a zero-cost wrapper around RecordedOrDeferredNode in the case that ranges are not verified.
This commit is contained in:
Alex Hoppen
2021-03-10 18:08:45 +01:00
parent 0d913e9531
commit 350ac1514c
8 changed files with 247 additions and 126 deletions
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60
tools/libSwiftSyntaxParser/libSwiftSyntaxParser.cpp
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@@ -123,7 +123,7 @@ struct DeferredLayoutNode {
: Kind(Kind), Children(Children), Length(Length) {}
};
class CLibParseActions : public SyntaxParseActions {
class CLibParseActions final : public SyntaxParseActions {
SynParser &SynParse;
SourceManager &SM;
unsigned BufferID;
@@ -309,8 +309,43 @@ private:
return recordRawSyntax(Data->Kind, children);
}
DeferredNodeInfo getDeferredChild(OpaqueSyntaxNode node, size_t ChildIndex,
SourceLoc StartLoc) override {
DeferredNodeInfo getDeferredChild(OpaqueSyntaxNode node,
size_t ChildIndex) const override {
auto Data = static_cast<const DeferredLayoutNode *>(node);
auto Child = Data->Children[ChildIndex];
switch (Child.getKind()) {
case RecordedOrDeferredNode::Kind::Null:
return DeferredNodeInfo(
RecordedOrDeferredNode(nullptr, RecordedOrDeferredNode::Kind::Null),
syntax::SyntaxKind::Unknown, tok::NUM_TOKENS,
/*IsMissing=*/false);
case RecordedOrDeferredNode::Kind::Recorded:
llvm_unreachable("Children of deferred nodes must also be deferred");
break;
case RecordedOrDeferredNode::Kind::DeferredLayout: {
auto ChildData =
static_cast<const DeferredLayoutNode *>(Child.getOpaque());
return DeferredNodeInfo(
RecordedOrDeferredNode(ChildData,
RecordedOrDeferredNode::Kind::DeferredLayout),
ChildData->Kind, tok::NUM_TOKENS,
/*IsMissing=*/false);
}
case RecordedOrDeferredNode::Kind::DeferredToken: {
auto ChildData =
static_cast<const DeferredTokenNode *>(Child.getOpaque());
return DeferredNodeInfo(
RecordedOrDeferredNode(ChildData,
RecordedOrDeferredNode::Kind::DeferredToken),
syntax::SyntaxKind::Token, ChildData->TokenKind,
ChildData->IsMissing);
}
}
}
CharSourceRange getDeferredChildRange(OpaqueSyntaxNode node,
size_t ChildIndex,
SourceLoc StartLoc) const override {
auto Data = static_cast<const DeferredLayoutNode *>(node);
// Compute the start offset of the child node by advancing StartLoc by the
@@ -337,28 +372,19 @@ private:
auto Child = Data->Children[ChildIndex];
switch (Child.getKind()) {
case RecordedOrDeferredNode::Kind::Null:
return DeferredNodeInfo(
RecordedOrDeferredNode(nullptr, RecordedOrDeferredNode::Kind::Null),
syntax::SyntaxKind::Unknown, tok::NUM_TOKENS,
/*IsMissing=*/false, CharSourceRange(StartLoc, /*Length=*/0));
return CharSourceRange(StartLoc, /*Length=*/0);
case RecordedOrDeferredNode::Kind::Recorded:
llvm_unreachable("Children of deferred nodes must also be deferred");
break;
case RecordedOrDeferredNode::Kind::DeferredLayout: {
auto ChildData = static_cast<const DeferredLayoutNode *>(Child.getOpaque());
return DeferredNodeInfo(
RecordedOrDeferredNode(ChildData,
RecordedOrDeferredNode::Kind::DeferredLayout),
ChildData->Kind, tok::NUM_TOKENS,
/*IsMissing=*/false, CharSourceRange(StartLoc, ChildData->Length));
return CharSourceRange(StartLoc, ChildData->Length);
}
case RecordedOrDeferredNode::Kind::DeferredToken: {
auto ChildData = static_cast<const DeferredTokenNode *>(Child.getOpaque());
return DeferredNodeInfo(
RecordedOrDeferredNode(ChildData,
RecordedOrDeferredNode::Kind::DeferredToken),
syntax::SyntaxKind::Token, ChildData->TokenKind, ChildData->IsMissing,
ChildData->Range);
assert(ChildData->Range.getStart() == StartLoc &&
"Something broken in our StartLoc computation?");
return ChildData->Range;
}
}
}