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f3ff561c6f
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
//===--- CodeCompletionStringPrinter.h ------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2022 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IDE_CODECOMPLETIONRESULTSTRINGPRINTER_H
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#define SWIFT_IDE_CODECOMPLETIONRESULTSTRINGPRINTER_H
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#include "swift/AST/ASTPrinter.h"
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#include "swift/IDE/CodeCompletionString.h"
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namespace swift {
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namespace ide {
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/// 'ASTPrinter' printing to 'CodeCompletionString' with appropriate ChunkKind.
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/// This is mainly used for printing types and override completions.
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class CodeCompletionStringPrinter : public ASTPrinter {
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protected:
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using ChunkKind = CodeCompletionString::Chunk::ChunkKind;
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private:
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CodeCompletionResultBuilder &Builder;
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SmallString<16> Buffer;
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ChunkKind CurrChunkKind = ChunkKind::Text;
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ChunkKind NextChunkKind = ChunkKind::Text;
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SmallVector<PrintStructureKind, 2> StructureStack;
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unsigned int TypeDepth = 0;
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bool InPreamble = false;
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bool isCurrentStructureKind(PrintStructureKind Kind) const {
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return !StructureStack.empty() && StructureStack.back() == Kind;
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}
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bool isInType() const { return TypeDepth > 0; }
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llvm::Optional<ChunkKind>
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getChunkKindForPrintNameContext(PrintNameContext context) const;
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llvm::Optional<ChunkKind>
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getChunkKindForStructureKind(PrintStructureKind Kind) const;
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void startNestedGroup(ChunkKind Kind);
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void endNestedGroup();
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protected:
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void setNextChunkKind(ChunkKind Kind) { NextChunkKind = Kind; }
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public:
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CodeCompletionStringPrinter(CodeCompletionResultBuilder &Builder)
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: Builder(Builder) {}
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~CodeCompletionStringPrinter() {
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// Flush the remainings.
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flush();
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}
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void flush();
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/// Start \c AttributeAndModifierListBegin group. This must be called before
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/// any attributes/modifiers printed to the output when printing an override
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/// compleion.
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void startPreamble();
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/// End the current \c AttributeAndModifierListBegin group if it's still open.
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/// This is automatically called before the main part of the signature.
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void endPremable();
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/// Implement \c ASTPrinter .
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public:
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void printText(StringRef Text) override;
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void printTypeRef(
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Type T, const TypeDecl *TD, Identifier Name,
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PrintNameContext NameContext = PrintNameContext::Normal) override;
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void printDeclLoc(const Decl *D) override;
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void printDeclNameEndLoc(const Decl *D) override;
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void printNamePre(PrintNameContext context) override;
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void printNamePost(PrintNameContext context) override;
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void printTypePre(const TypeLoc &TL) override;
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void printTypePost(const TypeLoc &TL) override;
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void printStructurePre(PrintStructureKind Kind, const Decl *D) override;
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void printStructurePost(PrintStructureKind Kind, const Decl *D) override;
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};
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} // end namespace ide
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} // end namespace swift
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#endif // SWIFT_IDE_CODECOMPLETIONRESULTSTRINGPRINTER_H
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