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628 lines
21 KiB
C++
628 lines
21 KiB
C++
//===- SyntaxModel.cpp - Routines for IDE syntax model --------------------===//
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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) 2014 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/IDE/SyntaxModel.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/ASTWalker.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/Stmt.h"
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#include "swift/AST/TypeRepr.h"
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#include "swift/Basic/SourceManager.h"
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#include "swift/Parse/Lexer.h"
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#include "swift/Parse/Token.h"
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#include "swift/Subsystems.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <vector>
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using namespace swift;
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using namespace ide;
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void SyntaxModelWalker::anchor() {}
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struct SyntaxModelContext::Implementation {
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SourceFile &SrcFile;
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const LangOptions &LangOpts;
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const SourceManager &SrcMgr;
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std::vector<SyntaxNode> TokenNodes;
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Implementation(SourceFile &SrcFile)
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: SrcFile(SrcFile),
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LangOpts(SrcFile.getASTContext().LangOpts),
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SrcMgr(SrcFile.getASTContext().SourceMgr) {}
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};
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SyntaxModelContext::SyntaxModelContext(SourceFile &SrcFile)
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: Impl(*new Implementation(SrcFile)) {
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const SourceManager &SM = Impl.SrcMgr;
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std::vector<Token> Tokens = swift::tokenize(Impl.LangOpts, SM,
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*Impl.SrcFile.getBufferID(),
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/*Offset=*/0,
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/*EndOffset=*/0,
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/*KeepComments=*/true,
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/*TokenizeInterpolatedString=*/true);
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std::vector<SyntaxNode> Nodes;
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SourceLoc AttrLoc;
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for (auto &Tok : Tokens) {
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SyntaxNodeKind Kind;
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SourceLoc Loc;
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unsigned Length;
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if (AttrLoc.isValid()) {
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// This token is following @, see if it's a known attribute name.
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bool IsAttr = llvm::StringSwitch<bool>(Tok.getText())
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#define ATTR(X) .Case(#X, true)
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#define TYPE_ATTR(X) .Case(#X, true)
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#define DECL_ATTR(X, ...) .Case(#X, true)
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#define VIRTUAL_DECL_ATTR(X, ...)
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#include "swift/AST/Attr.def"
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.Default(false);
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if (IsAttr) {
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// It's a known attribute, so treat it as a syntactic attribute node for
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// syntax coloring. If swift gets user attributes then all identifiers
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// will be treated as syntactic attribute nodes.
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Loc = AttrLoc;
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Length = SM.getByteDistance(Loc, Tok.getLoc()) + Tok.getLength();
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Kind = SyntaxNodeKind::AttributeId;
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}
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AttrLoc = SourceLoc();
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}
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if (!Loc.isValid()) {
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Loc = Tok.getLoc();
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Length = Tok.getLength();
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switch(Tok.getKind()) {
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#define KEYWORD(X) case tok::kw_##X: Kind = SyntaxNodeKind::Keyword; break;
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#include "swift/Parse/Tokens.def"
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#undef KEYWORD
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case tok::identifier: Kind = SyntaxNodeKind::Identifier; break;
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case tok::dollarident: Kind = SyntaxNodeKind::DollarIdent; break;
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case tok::integer_literal: Kind = SyntaxNodeKind::Integer; break;
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case tok::floating_literal: Kind = SyntaxNodeKind::Floating; break;
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case tok::string_literal: Kind = SyntaxNodeKind::String; break;
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case tok::character_literal: Kind = SyntaxNodeKind::Character; break;
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case tok::comment:
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if (Tok.getText().startswith("//"))
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Kind = SyntaxNodeKind::CommentLine;
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else
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Kind = SyntaxNodeKind::CommentBlock;
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break;
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case tok::at_sign:
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// Set the location of @ and continue. Next token should be the
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// attribute name.
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AttrLoc = Tok.getLoc();
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continue;
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default:
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continue;
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}
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}
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assert(Loc.isValid());
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assert(Nodes.empty() || SM.isBeforeInBuffer(Nodes.back().Range.getStart(),
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Loc));
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Nodes.emplace_back(Kind, CharSourceRange(Loc, Length));
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}
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Impl.TokenNodes = std::move(Nodes);
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}
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SyntaxModelContext::~SyntaxModelContext() {
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delete &Impl;
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}
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namespace {
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class ModelASTWalker : public ASTWalker {
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const LangOptions &LangOpts;
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const SourceManager &SM;
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unsigned BufferID;
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std::vector<SyntaxStructureNode> SubStructureStack;
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SourceLoc LastLoc;
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public:
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SyntaxModelWalker &Walker;
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ArrayRef<SyntaxNode> TokenNodes;
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ModelASTWalker(const LangOptions &LangOpts, const SourceManager &SM,
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unsigned BufferID, SyntaxModelWalker &Walker)
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: LangOpts(LangOpts), SM(SM), BufferID(BufferID), Walker(Walker) { }
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void visitSourceFile(SourceFile &SrcFile, ArrayRef<SyntaxNode> Tokens);
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std::pair<bool, Stmt *> walkToStmtPre(Stmt *S) override;
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Stmt *walkToStmtPost(Stmt *S) override;
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bool walkToDeclPre(Decl *D) override;
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bool walkToDeclPost(Decl *D) override;
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bool walkToTypeReprPre(TypeRepr *T) override;
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private:
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bool annotateIfConfigConditionIdentifiers(Expr *Cond);
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bool handleAttrs(const DeclAttributes &Attrs);
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bool handleAttrs(const TypeAttributes &Attrs);
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bool handleAttrRanges(SourceLoc AtLoc, ArrayRef<SourceRange> Ranges);
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bool shouldPassBraceStructureNode(BraceStmt *S);
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enum PassNodesBehavior {
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/// Pass all nodes up to but not including the location.
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ExcludeNodeAtLocation,
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/// Pass all nodes up to and including the location.
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IncludeNodeAtLocation,
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/// Like ExcludeNodeAtLocation, and skip past any node at the location.
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DisplaceNodeAtLocation
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};
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bool passTokenNodesUntil(SourceLoc Loc, PassNodesBehavior Behavior);
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bool passNonTokenNode(const SyntaxNode &Node);
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bool passNode(const SyntaxNode &Node);
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bool pushStructureNode(const SyntaxStructureNode &Node);
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bool popStructureNode();
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};
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SyntaxStructureKind syntaxStructureKindFromNominalTypeDecl(NominalTypeDecl *N) {
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if (isa<ClassDecl>(N))
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return SyntaxStructureKind::Class;
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else if (isa<StructDecl>(N))
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return SyntaxStructureKind::Struct;
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else if (isa<ProtocolDecl>(N))
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return SyntaxStructureKind::Protocol;
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else {
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// All other known NominalTypeDecl derived classes covered, so assert() here.
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assert(isa<EnumDecl>(N));
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return SyntaxStructureKind::Enum;
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}
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}
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CharSourceRange charSourceRangeFromSourceRange(const SourceManager &SM,
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const SourceRange &SR) {
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SourceLoc SRE = Lexer::getLocForEndOfToken(SM, SR.End);
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return CharSourceRange(SM, SR.Start, SRE);
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}
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CharSourceRange innerCharSourceRangeFromSourceRange(const SourceManager &SM,
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const SourceRange &SR) {
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if (SR.isInvalid())
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return CharSourceRange();
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SourceLoc SRS = Lexer::getLocForEndOfToken(SM, SR.Start);
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return CharSourceRange(SM, SRS, (SR.End != SR.Start) ? SR.End : SRS);
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}
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} // anonymous namespace
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bool SyntaxModelContext::walk(SyntaxModelWalker &Walker) {
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ModelASTWalker ASTWalk(Impl.LangOpts, Impl.SrcMgr,
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*Impl.SrcFile.getBufferID(), Walker);
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ASTWalk.visitSourceFile(Impl.SrcFile, Impl.TokenNodes);
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return true;
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}
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void ModelASTWalker::visitSourceFile(SourceFile &SrcFile,
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ArrayRef<SyntaxNode> Tokens) {
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TokenNodes = Tokens;
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SrcFile.walk(*this);
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// Pass the rest of the token nodes.
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for (auto &TokNode : TokenNodes)
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passNode(TokNode);
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}
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std::pair<bool, Stmt *> ModelASTWalker::walkToStmtPre(Stmt *S) {
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if (isa<BraceStmt>(S) && shouldPassBraceStructureNode(cast<BraceStmt>(S))) {
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// Pass BraceStatement structure node.
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SyntaxStructureNode SN;
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SN.Kind = SyntaxStructureKind::BraceStatement;
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SN.Range = charSourceRangeFromSourceRange(SM, S->getSourceRange());
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SN.BodyRange = innerCharSourceRangeFromSourceRange(SM,
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S->getSourceRange());
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pushStructureNode(SN);
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} else if (auto *SW = dyn_cast<SwitchStmt>(S)) {
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if (SW->getLBraceLoc().isValid() && SW->getRBraceLoc().isValid()) {
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SourceRange BraceRange(SW->getLBraceLoc(), SW->getRBraceLoc());
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SyntaxStructureNode SN;
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SN.Kind = SyntaxStructureKind::BraceStatement;
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SN.Range = charSourceRangeFromSourceRange(SM, BraceRange);
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SN.BodyRange = innerCharSourceRangeFromSourceRange(SM, BraceRange);
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pushStructureNode(SN);
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}
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} else if (auto ConfigS = dyn_cast<IfConfigStmt>(S)) {
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for (auto &Clause : ConfigS->getClauses()) {
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unsigned TokLen;
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if (&Clause == &*ConfigS->getClauses().begin())
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TokLen = 3; // '#if'
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else if (Clause.Cond == nullptr)
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TokLen = 5; // '#else'
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else
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TokLen = 7; // '#elseif'
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if (!passNonTokenNode({SyntaxNodeKind::BuildConfigKeyword,
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CharSourceRange(Clause.Loc, TokLen) }))
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return { false, nullptr };
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if (Clause.Cond && !annotateIfConfigConditionIdentifiers(Clause.Cond))
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return { false, nullptr };
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if (!Clause.Body->walk(*this))
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return { false, nullptr };
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}
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if (!ConfigS->hadMissingEnd())
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if (!passNonTokenNode({ SyntaxNodeKind::BuildConfigKeyword,
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CharSourceRange(ConfigS->getEndLoc(), 6/*'#endif'*/) }))
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return { false, nullptr };
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}
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return { true, S };
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}
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Stmt *ModelASTWalker::walkToStmtPost(Stmt *S) {
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if (isa<BraceStmt>(S) && shouldPassBraceStructureNode(cast<BraceStmt>(S)))
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popStructureNode();
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else if (auto *SW = dyn_cast<SwitchStmt>(S)) {
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if (SW->getLBraceLoc().isValid() && SW->getRBraceLoc().isValid())
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popStructureNode();
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}
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return S;
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}
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bool ModelASTWalker::walkToDeclPre(Decl *D) {
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if (D->isImplicit())
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return false;
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if (!handleAttrs(D->getAttrs()))
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return false;
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if (auto *AFD = dyn_cast<AbstractFunctionDecl>(D)) {
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FuncDecl *FD = dyn_cast<FuncDecl>(AFD);
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if (FD && FD->isAccessor()) {
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// Pass context sensitive keyword token.
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SourceLoc SL = FD->getFuncLoc();
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// Make sure the func loc is not the start of the function body, in which
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// case the context sensitive keyword was implied.
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if (FD->getBodySourceRange().Start != SL) {
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unsigned TokLen;
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switch (FD->getAccessorKind()) {
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case AccessorKind::NotAccessor: llvm_unreachable("expected accessor");
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case AccessorKind::IsGetter: TokLen = 3; break;
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case AccessorKind::IsSetter: TokLen = 3; break;
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case AccessorKind::IsWillSet: TokLen = 7; break;
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case AccessorKind::IsDidSet: TokLen = 6; break;
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}
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if (!passNonTokenNode({ SyntaxNodeKind::Keyword,
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CharSourceRange(SL, TokLen)}))
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return false;
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}
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} else {
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// Pass Function / Method structure node.
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SyntaxStructureNode SN;
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SN.Dcl = D;
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const DeclContext *DC = AFD->getDeclContext();
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if (DC->isTypeContext()) {
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if (FD && FD->isStatic())
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SN.Kind = SyntaxStructureKind::StaticFunction;
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else
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SN.Kind = SyntaxStructureKind::InstanceFunction;
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}
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else
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SN.Kind = SyntaxStructureKind::FreeFunction;
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SN.Range = charSourceRangeFromSourceRange(SM, AFD->getSourceRange());
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SN.BodyRange = innerCharSourceRangeFromSourceRange(SM,
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AFD->getBodySourceRange());
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SN.NameRange = charSourceRangeFromSourceRange(SM,
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AFD->getSignatureSourceRange());
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SN.Attrs = AFD->getAttrs();
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pushStructureNode(SN);
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}
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} else if (auto *NTD = dyn_cast<NominalTypeDecl>(D)) {
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SyntaxStructureNode SN;
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SN.Dcl = D;
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SN.Kind = syntaxStructureKindFromNominalTypeDecl(NTD);
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SN.Range = charSourceRangeFromSourceRange(SM, NTD->getSourceRange());
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SN.BodyRange = innerCharSourceRangeFromSourceRange(SM, NTD->getBraces());
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SourceLoc NRStart = NTD->getNameLoc();
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SourceLoc NREnd = NRStart.getAdvancedLoc(NTD->getName().getLength());
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SN.NameRange = CharSourceRange(SM, NRStart, NREnd);
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for (const TypeLoc &TL : NTD->getInherited()) {
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CharSourceRange TR = charSourceRangeFromSourceRange(SM,
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TL.getSourceRange());
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SN.InheritedTypeRanges.push_back(TR);
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}
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SN.Attrs = NTD->getAttrs();
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pushStructureNode(SN);
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} else if (auto *VD = dyn_cast<VarDecl>(D)) {
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const DeclContext *DC = VD->getDeclContext();
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if (DC->isTypeContext()) {
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SyntaxStructureNode SN;
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SN.Dcl = D;
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SourceRange SR;
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if (PatternBindingDecl *PD = VD->getParentPattern())
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SR = PD->getSourceRange();
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else
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SR = VD->getSourceRange();
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SN.Range = charSourceRangeFromSourceRange(SM, SR);
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if (VD->hasAccessorFunctions())
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SN.BodyRange = innerCharSourceRangeFromSourceRange(SM,
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VD->getBracesRange());
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SourceLoc NRStart = VD->getNameLoc();
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SourceLoc NREnd = NRStart.getAdvancedLoc(VD->getName().getLength());
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SN.NameRange = CharSourceRange(SM, NRStart, NREnd);
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SN.TypeRange = charSourceRangeFromSourceRange(SM,
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VD->getTypeSourceRangeForDiagnostics());
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SN.Kind = SyntaxStructureKind::InstanceVariable;
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SN.Attrs = VD->getAttrs();
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pushStructureNode(SN);
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}
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} else if (auto *ConfigD = dyn_cast<IfConfigDecl>(D)) {
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for (auto &Clause : ConfigD->getClauses()) {
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unsigned TokLen;
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if (&Clause == &*ConfigD->getClauses().begin())
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TokLen = 3; // '#if'
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else if (Clause.Cond == nullptr)
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TokLen = 5; // '#else'
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else
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TokLen = 7; // '#elseif'
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if (!passNonTokenNode({SyntaxNodeKind::BuildConfigKeyword,
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CharSourceRange(Clause.Loc, TokLen) }))
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return false;
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if (Clause.Cond && !annotateIfConfigConditionIdentifiers(Clause.Cond))
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return false;
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for (auto *D : Clause.Members)
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if (D->walk(*this))
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return false;
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}
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if (!ConfigD->hadMissingEnd())
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if (!passNonTokenNode({ SyntaxNodeKind::BuildConfigKeyword,
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CharSourceRange(ConfigD->getEndLoc(), 6/*'#endif'*/) }))
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return false;
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}
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return true;
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}
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bool ModelASTWalker::walkToDeclPost(swift::Decl *D) {
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if (isa<AbstractFunctionDecl>(D)) {
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FuncDecl *FD = dyn_cast<FuncDecl>(D);
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if (!(FD && FD->isAccessor())) {
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popStructureNode();
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}
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} else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
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const DeclContext *DC = VD->getDeclContext();
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if (DC->isTypeContext()) {
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popStructureNode();
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}
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} else if (isa<NominalTypeDecl>(D)) {
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popStructureNode();
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}
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return true;
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}
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bool ModelASTWalker::walkToTypeReprPre(TypeRepr *T) {
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if (auto AttrT = dyn_cast<AttributedTypeRepr>(T)) {
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if (!handleAttrs(AttrT->getAttrs()))
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return false;
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} else if (auto IdT = dyn_cast<ComponentIdentTypeRepr>(T)) {
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if (!passNonTokenNode({ SyntaxNodeKind::TypeId,
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CharSourceRange(IdT->getIdLoc(),
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IdT->getIdentifier().getLength())
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}))
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return false;
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} else if (auto InOutT = dyn_cast<InOutTypeRepr>(T)) {
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if (!passNonTokenNode({ SyntaxNodeKind::Keyword,
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CharSourceRange(InOutT->getInOutLoc(), /*'inout'*/5)
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}))
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return false;
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}
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return true;
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}
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namespace {
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template <typename FnTy>
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class IdRefWalker : public ASTWalker {
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const FnTy &Fn;
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public:
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IdRefWalker(const FnTy &Fn) : Fn(Fn) {}
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std::pair<bool, Expr *> walkToExprPre(Expr *E) override {
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if (auto DRE = dyn_cast<UnresolvedDeclRefExpr>(E)) {
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if (!DRE->hasName())
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return { true, E };
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if (DRE->getRefKind() != DeclRefKind::Ordinary)
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return { true, E };
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if (!Fn(CharSourceRange(DRE->getSourceRange().Start,
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DRE->getName().getLength())))
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return { false, nullptr };
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}
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return { true, E };
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}
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};
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}
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bool ModelASTWalker::annotateIfConfigConditionIdentifiers(Expr *Cond) {
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if (!Cond)
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return true;
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auto passNode = [&](CharSourceRange R) {
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return passNonTokenNode({ SyntaxNodeKind::BuildConfigId, R });
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};
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IdRefWalker<decltype(passNode)> Walker(passNode);
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if (!Cond->walk(Walker))
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return false;
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return true;
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}
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bool ModelASTWalker::handleAttrs(const DeclAttributes &Attrs) {
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SmallVector<SourceRange, 4> Ranges;
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Attrs.getAttrRanges(Ranges);
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return handleAttrRanges(Attrs.AtLoc, Ranges);
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}
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bool ModelASTWalker::handleAttrs(const TypeAttributes &Attrs) {
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SmallVector<SourceRange, 4> Ranges;
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Attrs.getAttrRanges(Ranges);
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return handleAttrRanges(Attrs.AtLoc, Ranges);
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}
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bool ModelASTWalker::handleAttrRanges(SourceLoc AtLoc,
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ArrayRef<SourceRange> Ranges) {
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if (Ranges.empty())
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return true;
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SmallVector<SourceRange, 4> SortedRanges(Ranges.begin(), Ranges.end());
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std::sort(SortedRanges.begin(), SortedRanges.end(),
|
|
[&](SourceRange LHS, SourceRange RHS) {
|
|
return SM.isBeforeInBuffer(LHS.Start, RHS.End);
|
|
});
|
|
Ranges = SortedRanges;
|
|
|
|
SourceLoc BeginLoc = AtLoc;
|
|
if (!AtLoc.isValid())
|
|
BeginLoc = Ranges.front().Start;
|
|
|
|
std::vector<Token> Toks = swift::tokenize(
|
|
LangOpts, SM, BufferID,
|
|
SM.getLocOffsetInBuffer(BeginLoc, BufferID),
|
|
SM.getLocOffsetInBuffer(Ranges.back().End, BufferID),
|
|
/*KeepComments=*/true,
|
|
/*TokenizeInterpolatedString=*/false);
|
|
|
|
auto passAttrNode = [&](SourceLoc AtLoc, SourceRange AttrRange) -> bool {
|
|
SourceRange Range;
|
|
if (AtLoc.isValid())
|
|
Range = SourceRange(AtLoc, AttrRange.End);
|
|
else
|
|
Range = AttrRange;
|
|
if (!passNonTokenNode({SyntaxNodeKind::AttributeBuiltin,
|
|
charSourceRangeFromSourceRange(SM, Range)}))
|
|
return false;
|
|
|
|
while (SM.rangeContainsTokenLoc(AttrRange,
|
|
TokenNodes.front().Range.getStart()))
|
|
TokenNodes = TokenNodes.slice(1);
|
|
return true;
|
|
};
|
|
|
|
for (auto Tok : Toks) {
|
|
if (Ranges.empty())
|
|
break;
|
|
if (Tok.getLoc() == Ranges.front().Start) {
|
|
auto R = Ranges.front();
|
|
Ranges = Ranges.slice(1);
|
|
if (!passAttrNode(AtLoc, R))
|
|
return false;
|
|
}
|
|
|
|
if (Tok.is(tok::at_sign))
|
|
AtLoc = Tok.getLoc();
|
|
else if (Tok.isNot(tok::exclaim_postfix))
|
|
AtLoc = SourceLoc();
|
|
}
|
|
|
|
if (!Ranges.empty()) {
|
|
if (!passAttrNode(AtLoc, Ranges.front()))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ModelASTWalker::shouldPassBraceStructureNode(BraceStmt *S) {
|
|
return (!dyn_cast_or_null<AbstractFunctionDecl>(Parent.getAsDecl()) &&
|
|
!dyn_cast_or_null<TopLevelCodeDecl>(Parent.getAsDecl()) &&
|
|
!dyn_cast_or_null<CaseStmt>(Parent.getAsStmt()) &&
|
|
S->getSourceRange().isValid());
|
|
}
|
|
|
|
bool ModelASTWalker::passTokenNodesUntil(SourceLoc Loc,
|
|
PassNodesBehavior Behavior) {
|
|
assert(Loc.isValid());
|
|
unsigned I = 0;
|
|
for (unsigned E = TokenNodes.size(); I != E; ++I) {
|
|
SourceLoc TokLoc = TokenNodes[I].Range.getStart();
|
|
if (SM.isBeforeInBuffer(Loc, TokLoc)) {
|
|
break;
|
|
}
|
|
if (TokLoc == Loc && Behavior != IncludeNodeAtLocation) {
|
|
if (Behavior == DisplaceNodeAtLocation) {
|
|
// Skip past the node directly at the specified location, allowing the
|
|
// caller to effectively replace it.
|
|
++I;
|
|
}
|
|
break;
|
|
}
|
|
if (!passNode(TokenNodes[I]))
|
|
return false;
|
|
}
|
|
|
|
TokenNodes = TokenNodes.slice(I);
|
|
return true;
|
|
}
|
|
|
|
bool ModelASTWalker::passNonTokenNode(const SyntaxNode &Node) {
|
|
// Skip out of order non-token nodes.
|
|
// Ideally this shouldn't happen, but the AST can contain overlapping nodes,
|
|
// such as multiple PatternBindingDecl in code like: var a, b : Int. Which
|
|
// would cause us to report the TypeRepr twice.
|
|
if (!SM.isBeforeInBuffer(LastLoc, Node.Range.getStart()))
|
|
return false;
|
|
|
|
if (!passTokenNodesUntil(Node.Range.getStart(), DisplaceNodeAtLocation))
|
|
return false;
|
|
if (!passNode(Node))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool ModelASTWalker::passNode(const SyntaxNode &Node) {
|
|
assert(!SM.isBeforeInBuffer(Node.Range.getStart(), LastLoc));
|
|
LastLoc = Node.Range.getStart();
|
|
|
|
Walker.walkToNodePre(Node);
|
|
if (!Walker.walkToNodePost(Node))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool ModelASTWalker::pushStructureNode(const SyntaxStructureNode &Node) {
|
|
SubStructureStack.push_back(Node);
|
|
|
|
if (!passTokenNodesUntil(Node.Range.getStart(), ExcludeNodeAtLocation))
|
|
return false;
|
|
if (!Walker.walkToSubStructurePre(Node))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ModelASTWalker::popStructureNode() {
|
|
assert(!SubStructureStack.empty());
|
|
SyntaxStructureNode Node = SubStructureStack.back();
|
|
SubStructureStack.pop_back();
|
|
|
|
if (!Walker.walkToSubStructurePost(Node))
|
|
return false;
|
|
|
|
return true;
|
|
}
|