mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
c343298b8f
A return statement needs something to return, so implement
integer-literal-expression too. This necessarily also forced
UnknownExprSyntax, UnknownStmtSyntax, and UnknownDeclSyntax,
which are stand-in token buckets for when we don't know
how to transform/migrate an AST.
This commit also contains the core function for caching
SyntaxData children. This is highly tricky code, with some
detailed comments in SyntaxData.{h,cpp}. The gist is that
we have to atomically swap in a SyntaxData pointer into the
child field, so we can maintain pointer identity of SyntaxData
nodes, while still being able to cache them internally.
To prove that this works, there is a multithreaded test that
checks that two threads can ask for a child that hasn't been
cached yet without crashing or violating pointer identity.
https://bugs.swift.org/browse/SR-4010
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
//===--- SyntaxData.cpp - Swift Syntax Data Implementation ------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "swift/Syntax/DeclSyntax.h"
|
|
#include "swift/Syntax/ExprSyntax.h"
|
|
#include "swift/Syntax/GenericSyntax.h"
|
|
#include "swift/Syntax/TypeSyntax.h"
|
|
#include "swift/Syntax/StmtSyntax.h"
|
|
|
|
using namespace swift;
|
|
using namespace swift::syntax;
|
|
|
|
RC<SyntaxData> SyntaxData::make(RC<RawSyntax> Raw,
|
|
const SyntaxData *Parent,
|
|
CursorIndex IndexInParent) {
|
|
return RC<SyntaxData> {
|
|
new SyntaxData(Raw, Parent, IndexInParent)
|
|
};
|
|
}
|
|
|
|
RC<SyntaxData> SyntaxData::makeDataFromRaw(RC<RawSyntax> Raw,
|
|
const SyntaxData *Parent,
|
|
CursorIndex IndexInParent) {
|
|
switch (Raw->Kind) {
|
|
#define SYNTAX(Id, ParentType) \
|
|
case SyntaxKind::Id: \
|
|
return Id##SyntaxData::make(Raw, Parent, IndexInParent);
|
|
|
|
#define MISSING_SYNTAX(Id, ParentType) \
|
|
case SyntaxKind::Id: \
|
|
return ParentType##Data::make(Raw, Parent, IndexInParent);
|
|
|
|
#include "swift/Syntax/SyntaxKinds.def"
|
|
case SyntaxKind::Token:
|
|
llvm_unreachable("Can't make a SyntaxData from a Token!");
|
|
}
|
|
}
|
|
|
|
bool SyntaxData::isType() const {
|
|
return Raw->isType();
|
|
}
|
|
|
|
bool SyntaxData::isStmt() const {
|
|
return Raw->isStmt();
|
|
}
|
|
|
|
bool SyntaxData::isDecl() const {
|
|
return Raw->isDecl();
|
|
}
|
|
|
|
bool SyntaxData::isExpr() const {
|
|
return Raw->isExpr();
|
|
}
|
|
|
|
void SyntaxData::dump(llvm::raw_ostream &OS) const {
|
|
Raw->dump(OS, 0);
|
|
}
|
|
|
|
#pragma mark - unknown-syntax Data
|
|
|
|
RC<UnknownSyntaxData> UnknownSyntaxData::make(RC<RawSyntax> Raw,
|
|
const SyntaxData *Parent,
|
|
CursorIndex IndexInParent) {
|
|
return RC<UnknownSyntaxData> {
|
|
new UnknownSyntaxData { Raw, Parent, IndexInParent }
|
|
};
|
|
}
|
|
|
|
bool UnknownSyntaxData::classof(const SyntaxData *SD) {
|
|
return SD->getKind() == SyntaxKind::Unknown;
|
|
}
|
|
|