| //===--- LegacyASTTransformer.h - Swift lib/AST -> lib/Syntax ---*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the interfaces for transforming a lib/AST tree into a |
| // lib/Syntax tree with full source fidelity. This is meant to be temporary |
| // infrastructure only. The goal of this library is to produce a syntax tree |
| // which is more amenable to structured editing. Once lib/Syntax is fully |
| // integrated into the rest of the pipeline, this will no longer be necessary. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef SWIFT_AST_LEGACYASTTRANSFORMER_H |
| #define SWIFT_AST_LEGACYASTTRANSFORMER_H |
| |
| #include "swift/AST/ASTNode.h" |
| #include "swift/AST/ASTVisitor.h" |
| #include "swift/AST/SyntaxASTMap.h" |
| #include "swift/Syntax/References.h" |
| #include "swift/Syntax/Syntax.h" |
| #include "swift/Syntax/TokenSyntax.h" |
| |
| namespace swift { |
| namespace syntax { |
| |
| using TokenPositionList = std::vector<std::pair<RC<RawTokenSyntax>, |
| AbsolutePosition>>; |
| |
| /// Transforms a swift/AST into a swift/Syntax/RC<RawSyntax>. |
| /// |
| /// The default behavior for this transformer, if it doesn't know how to |
| /// convert the AST node, is to return an `UnknownRC<RawSyntax>` containing the |
| /// tokens in the source range. |
| class LegacyASTTransformer : public ASTVisitor<LegacyASTTransformer, |
| RC<SyntaxData>, // Expr return type |
| RC<SyntaxData>, // Stmt return type |
| RC<SyntaxData>, // Decl return type |
| RC<SyntaxData>, // Pattern return type |
| RC<SyntaxData>, // TypeRepr return type |
| RC<SyntaxData>> // Attribute return type |
| { |
| SyntaxASTMap &ASTMap; |
| SourceManager &SourceMgr; |
| const unsigned BufferID; |
| const TokenPositionList &Tokens; |
| public: |
| LegacyASTTransformer(SyntaxASTMap &ASTMap, |
| SourceManager &SourceMgr, |
| const unsigned BufferID, |
| const TokenPositionList &Tokens) |
| : ASTMap(ASTMap), SourceMgr(SourceMgr), |
| BufferID(BufferID), Tokens(Tokens) {} |
| |
| /// If the Decl has attributes, provide the start SourceLoc for them; |
| /// otherwise, just ask the Decl for its usual start SourceLoc. |
| SourceLoc getStartLocForDecl(const Decl *D) const; |
| SourceLoc getEndLocForDecl(const Decl *D) const; |
| SourceLoc getEndLocForStmt(const Stmt *S) const; |
| SourceLoc getEndLocForExpr(const Expr *E) const; |
| RC<SyntaxData> getUnknownSyntax(SourceRange SR, SyntaxKind Kind); |
| RC<SyntaxData> getAttributesFromDecl(Decl *D); |
| RC<SyntaxData> getUnknownDecl(Decl *D); |
| RC<SyntaxData> getUnknownStmt(Stmt *S); |
| RC<SyntaxData> getUnknownExpr(Expr *E); |
| RC<SyntaxData> visitMembers(DeclRange Members); |
| |
| // RC<RawSyntax> visitDecl(Decl *D); |
| // RC<RawSyntax> visitExpr(Expr *E); |
| // RC<RawSyntax> visitStmt(Stmt *S); |
| #define DECL(CLASS, PARENT) RC<SyntaxData> \ |
| visit##CLASS##Decl(CLASS##Decl *, \ |
| const SyntaxData *Parent = nullptr, \ |
| const CursorIndex IndexInParent = 0); |
| #include "swift/AST/DeclNodes.def" |
| |
| #define STMT(CLASS, PARENT) RC<SyntaxData> \ |
| visit##CLASS##Stmt(CLASS##Stmt *, \ |
| const SyntaxData *Parent = nullptr, \ |
| const CursorIndex IndexInParent = 0); |
| #include "swift/AST/StmtNodes.def" |
| |
| #define EXPR(CLASS, PARENT) RC<SyntaxData> \ |
| visit##CLASS##Expr(CLASS##Expr *, \ |
| const SyntaxData *Parent = nullptr, \ |
| const CursorIndex IndexInParent = 0); |
| #include "swift/AST/ExprNodes.def" |
| }; |
| |
| /// Transform a legacy AST node to a full-fidelity `Syntax`. |
| /// |
| /// If an ASTNode's kind isn't covered by the transform, an `UnknownSyntax` |
| /// will be returned containing all of the `TokenSyntax`es that comprise the |
| /// node. |
| /// |
| /// If the node isn't expressible in a `Syntax`, then `None` is returned. |
| Optional<Syntax> |
| transformAST(ASTNode Node, |
| SyntaxASTMap &Sema, |
| SourceManager &SourceMgr, |
| const unsigned BufferID, |
| const TokenPositionList &Tokens); |
| |
| /// Do a binary search for a token at the given `Offset`. |
| TokenSyntax findTokenSyntax(tok ExpectedKind, |
| OwnedString ExpectedText, |
| SourceManager &SourceMgr, |
| SourceLoc Loc, |
| unsigned BufferID, |
| const TokenPositionList &Tokens); |
| |
| //ArrayRef<TokenSyntax> |
| //syntax::tokensInRange(SourceRange Range, const TokenPositionList &Tokens); |
| |
| } // end namespace syntax |
| } // end namespace swift |
| |
| #endif // SWIFT_AST_LEGACYASTTRANSFORMER_H |