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In -swift-version 5 and earlier, #file will continue to be a synonym for #filePath; in a future -swift-version (“Swift 6 mode”), it will become a synonym for #fileID. #file in libraries will be interpreted according to the language mode the library was compiled in, not the language mode its client uses. Implement this behavior, tied to a frontend flag instead of a language version. We do so by splitting the old `MagicIdentifierLiteralExprKind::File` into two separate cases, `FileIDSpelledAsFile` and `FilePathSpelledAsFile`, and propagating this distinction throughout the AST. This seems cleaner than looking up the setting for the module the declaration belongs to every time we see `File`. This doesn’t handle module interfaces yet; we’ll take care of those in a separate commit.
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
//===--- MagicIdentifierKinds.def - Swift #ident metaprogramming -*- C++ -*-===//
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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) 2020 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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//
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// This file defines macros used for macro-metaprogramming with magic
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// identifier literals.
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//
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//===----------------------------------------------------------------------===//
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// Used for any magic identifier.
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#ifndef MAGIC_IDENTIFIER
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#define MAGIC_IDENTIFIER(NAME, STRING, SYNTAX_KIND)
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#endif
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// Used for magic identifiers which produce string literals.
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#ifndef MAGIC_STRING_IDENTIFIER
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#define MAGIC_STRING_IDENTIFIER(NAME, STRING, SYNTAX_KIND) MAGIC_IDENTIFIER(NAME, STRING, SYNTAX_KIND)
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#endif
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// Used for magic identifiers which produce integer literals.
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#ifndef MAGIC_INT_IDENTIFIER
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#define MAGIC_INT_IDENTIFIER(NAME, STRING, SYNTAX_KIND) MAGIC_IDENTIFIER(NAME, STRING, SYNTAX_KIND)
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#endif
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// Used for magic identifiers which produce raw pointers.
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#ifndef MAGIC_POINTER_IDENTIFIER
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#define MAGIC_POINTER_IDENTIFIER(NAME, STRING, SYNTAX_KIND) MAGIC_IDENTIFIER(NAME, STRING, SYNTAX_KIND)
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#endif
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// Used when a given token always maps to a particular magic identifier kind.
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#ifndef MAGIC_IDENTIFIER_TOKEN
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#define MAGIC_IDENTIFIER_TOKEN(NAME, TOKEN)
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#endif
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// Used when a given token always maps to a particular magic identifier kind,
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// but that token is deprecated.
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#ifndef MAGIC_IDENTIFIER_DEPRECATED_TOKEN
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#define MAGIC_IDENTIFIER_DEPRECATED_TOKEN(NAME, TOKEN) MAGIC_IDENTIFIER_TOKEN(NAME, TOKEN)
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#endif
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//
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// Magic string literals
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//
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/// The \c #fileID magic identifier literal.
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MAGIC_STRING_IDENTIFIER(FileID, "#fileID", PoundFileIDExpr)
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MAGIC_IDENTIFIER_TOKEN(FileID, pound_fileID)
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/// The \c #file magic identifier literal, written in code where it is
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/// a synonym for \c #fileID (i.e. "Swift 6 mode" code).
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MAGIC_STRING_IDENTIFIER(FileIDSpelledAsFile, "#file", PoundFileExpr)
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// tok::pound_file is shared with FilePathSpelledAsFile; please write custom
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// code paths for it.
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/// The \c #filePath magic identifier literal.
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MAGIC_STRING_IDENTIFIER(FilePath, "#filePath", PoundFilePathExpr)
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MAGIC_IDENTIFIER_TOKEN(FilePath, pound_filePath)
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/// The \c #file magic identifier literal, written in code where it is
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/// a synonym for \c #filePath (i.e. Swift 5 mode code).
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MAGIC_STRING_IDENTIFIER(FilePathSpelledAsFile, "#file", PoundFileExpr)
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// tok::pound_file is shared with FileIDSpelledAsFile; please write custom
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// code paths for it.
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MAGIC_IDENTIFIER_DEPRECATED_TOKEN(FilePathSpelledAsFile, kw___FILE__)
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/// The \c #function magic identifier literal.
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MAGIC_STRING_IDENTIFIER(Function, "#function", PoundFunctionExpr)
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MAGIC_IDENTIFIER_TOKEN(Function, pound_function)
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MAGIC_IDENTIFIER_DEPRECATED_TOKEN(Function, kw___FUNCTION__)
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//
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// Magic integer literals
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//
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/// The \c #line magic identifier literal.
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MAGIC_INT_IDENTIFIER(Line, "#line", PoundLineExpr)
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MAGIC_IDENTIFIER_TOKEN(Line, pound_line)
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MAGIC_IDENTIFIER_DEPRECATED_TOKEN(Line, kw___LINE__)
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/// The \c #column magic identifier literal.
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MAGIC_INT_IDENTIFIER(Column, "#column", PoundColumnExpr)
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MAGIC_IDENTIFIER_TOKEN(Column, pound_column)
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MAGIC_IDENTIFIER_DEPRECATED_TOKEN(Column, kw___COLUMN__)
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//
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// Magic raw pointer literals
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//
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/// The \c #dsohandle magic identifier literal.
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MAGIC_POINTER_IDENTIFIER(DSOHandle, "#dsohandle", PoundDsohandleExpr)
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MAGIC_IDENTIFIER_TOKEN(DSOHandle, pound_dsohandle)
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MAGIC_IDENTIFIER_DEPRECATED_TOKEN(DSOHandle, kw___DSO_HANDLE__)
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#undef MAGIC_IDENTIFIER
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#undef MAGIC_STRING_IDENTIFIER
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#undef MAGIC_INT_IDENTIFIER
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#undef MAGIC_POINTER_IDENTIFIER
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#undef MAGIC_IDENTIFIER_TOKEN
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#undef MAGIC_IDENTIFIER_DEPRECATED_TOKEN
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