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A ‘forwarding module’ is a YAML file that’s meant to stand in for a .swiftmodule file and provide an up-to-date description of its dependencies, always using modification times. When a ‘prebuilt module’ is first loaded, we verify that it’s up-to-date by hashing all of its dependencies. Since this is orders of magnitude slower than reading mtimes, we’ll install a `forwarding module` containing the mtimes of the now-validated dependencies.
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
//===--- ParseableInterfaceSupport.h - swiftinterface files -----*- 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) 2019 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_FRONTEND_PARSEABLEINTERFACESUPPORT_H
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#define SWIFT_FRONTEND_PARSEABLEINTERFACESUPPORT_H
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#include "swift/Basic/LLVM.h"
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#include "swift/Basic/Version.h"
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#include "llvm/Support/Regex.h"
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#define SWIFT_INTERFACE_FORMAT_VERSION_KEY "swift-interface-format-version"
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#define SWIFT_TOOLS_VERSION_KEY "swift-tools-version"
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#define SWIFT_MODULE_FLAGS_KEY "swift-module-flags"
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namespace swift {
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class ModuleDecl;
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/// Options for controlling the generation of the .swiftinterface output.
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struct ParseableInterfaceOptions {
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/// Copy of all the command-line flags passed at .swiftinterface
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/// generation time, re-applied to CompilerInvocation when reading
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/// back .swiftinterface and reconstructing .swiftmodule.
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std::string ParseableInterfaceFlags;
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};
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extern version::Version InterfaceFormatVersion;
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llvm::Regex getSwiftInterfaceFormatVersionRegex();
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llvm::Regex getSwiftInterfaceModuleFlagsRegex();
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/// Emit a stable, parseable interface for \p M, which can be used by a client
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/// source file to import this module, subject to options given by \p Opts.
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///
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/// Unlike a serialized module, the textual format generated by
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/// emitModuleInterface is intended to be stable across compiler versions while
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/// still describing the full ABI of the module in question.
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///
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/// The initial plan for this format can be found at
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/// https://forums.swift.org/t/plan-for-module-stability/14551/
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///
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/// \return true if an error occurred
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///
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/// \sa swift::serialize
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bool emitParseableInterface(raw_ostream &out,
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ParseableInterfaceOptions const &Opts,
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ModuleDecl *M);
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} // end namespace swift
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#endif
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