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fc51490baf
This patch moves the virtual file system form clang to llvm so it can be
used by more projects.
Concretely the patch:
- Moves VirtualFileSystem.{h|cpp} from clang/Basic to llvm/Support.
- Moves the corresponding unit test from clang to llvm.
- Moves the vfs namespace from clang::vfs to llvm::vfs.
- Formats the lines affected by this change, mostly this is the result of
the added llvm namespace.
RFC on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-October/126657.html
Differential revision: https://reviews.llvm.org/D52783
llvm-svn: 344140
131 lines
4.6 KiB
C++
131 lines
4.6 KiB
C++
//===--- RewriterTestContext.h ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a utility class for Rewriter related tests.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_UNITTESTS_TOOLING_REWRITERTESTCONTEXT_H
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#define LLVM_CLANG_UNITTESTS_TOOLING_REWRITERTESTCONTEXT_H
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/DiagnosticOptions.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Rewrite/Core/Rewriter.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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/// \brief A class that sets up a ready to use Rewriter.
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///
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/// Useful in unit tests that need a Rewriter. Creates all dependencies
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/// of a Rewriter with default values for testing and provides convenience
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/// methods, which help with writing tests that change files.
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class RewriterTestContext {
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public:
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RewriterTestContext()
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: DiagOpts(new DiagnosticOptions()),
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Diagnostics(IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
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&*DiagOpts),
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DiagnosticPrinter(llvm::outs(), &*DiagOpts),
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InMemoryFileSystem(new llvm::vfs::InMemoryFileSystem),
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OverlayFileSystem(
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new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem())),
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Files(FileSystemOptions(), OverlayFileSystem),
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Sources(Diagnostics, Files), Rewrite(Sources, Options) {
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Diagnostics.setClient(&DiagnosticPrinter, false);
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// FIXME: To make these tests truly in-memory, we need to overlay the
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// builtin headers.
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OverlayFileSystem->pushOverlay(InMemoryFileSystem);
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}
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~RewriterTestContext() {}
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FileID createInMemoryFile(StringRef Name, StringRef Content) {
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std::unique_ptr<llvm::MemoryBuffer> Source =
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llvm::MemoryBuffer::getMemBuffer(Content);
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InMemoryFileSystem->addFile(Name, 0, std::move(Source));
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const FileEntry *Entry = Files.getFile(Name);
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assert(Entry != nullptr);
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return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User);
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}
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// FIXME: this code is mostly a duplicate of
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// unittests/Tooling/RefactoringTest.cpp. Figure out a way to share it.
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FileID createOnDiskFile(StringRef Name, StringRef Content) {
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SmallString<1024> Path;
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int FD;
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std::error_code EC = llvm::sys::fs::createTemporaryFile(Name, "", FD, Path);
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assert(!EC);
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(void)EC;
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llvm::raw_fd_ostream OutStream(FD, true);
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OutStream << Content;
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OutStream.close();
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const FileEntry *File = Files.getFile(Path);
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assert(File != nullptr);
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StringRef Found =
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TemporaryFiles.insert(std::make_pair(Name, Path.str())).first->second;
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assert(Found == Path);
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(void)Found;
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return Sources.createFileID(File, SourceLocation(), SrcMgr::C_User);
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}
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SourceLocation getLocation(FileID ID, unsigned Line, unsigned Column) {
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SourceLocation Result = Sources.translateFileLineCol(
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Sources.getFileEntryForID(ID), Line, Column);
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assert(Result.isValid());
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return Result;
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}
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std::string getRewrittenText(FileID ID) {
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std::string Result;
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llvm::raw_string_ostream OS(Result);
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Rewrite.getEditBuffer(ID).write(OS);
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OS.flush();
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return Result;
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}
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std::string getFileContentFromDisk(StringRef Name) {
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std::string Path = TemporaryFiles.lookup(Name);
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assert(!Path.empty());
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// We need to read directly from the FileManager without relaying through
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// a FileEntry, as otherwise we'd read through an already opened file
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// descriptor, which might not see the changes made.
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// FIXME: Figure out whether there is a way to get the SourceManger to
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// reopen the file.
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auto FileBuffer = Files.getBufferForFile(Path);
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return (*FileBuffer)->getBuffer();
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}
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
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DiagnosticsEngine Diagnostics;
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TextDiagnosticPrinter DiagnosticPrinter;
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IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem;
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IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem;
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FileManager Files;
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SourceManager Sources;
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LangOptions Options;
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Rewriter Rewrite;
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// Will be set once on disk files are generated.
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llvm::StringMap<std::string> TemporaryFiles;
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};
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} // end namespace clang
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#endif
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