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//===--- ASTUnit.h - ASTUnit utility ----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// ASTUnit utility class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_FRONTEND_ASTUNIT_H
#define LLVM_CLANG_FRONTEND_ASTUNIT_H
#include "clang/Serialization/ASTBitCodes.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "clang/Lex/ModuleLoader.h"
#include "clang/Lex/PreprocessingRecord.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/FileSystemOptions.h"
#include "clang-c/Index.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Path.h"
#include <map>
#include <string>
#include <vector>
#include <cassert>
#include <utility>
#include <sys/types.h>
namespace llvm {
class MemoryBuffer;
}
namespace clang {
class ASTContext;
class ASTReader;
class CodeCompleteConsumer;
class CompilerInvocation;
class CompilerInstance;
class Decl;
class DiagnosticsEngine;
class FileEntry;
class FileManager;
class HeaderSearch;
class Preprocessor;
class SourceManager;
class TargetInfo;
class ASTFrontendAction;
/// \brief Utility class for loading a ASTContext from an AST file.
///
class ASTUnit : public ModuleLoader {
private:
IntrusiveRefCntPtr<LangOptions> LangOpts;
IntrusiveRefCntPtr<DiagnosticsEngine> Diagnostics;
IntrusiveRefCntPtr<FileManager> FileMgr;
IntrusiveRefCntPtr<SourceManager> SourceMgr;
OwningPtr<HeaderSearch> HeaderInfo;
IntrusiveRefCntPtr<TargetInfo> Target;
IntrusiveRefCntPtr<Preprocessor> PP;
IntrusiveRefCntPtr<ASTContext> Ctx;
ASTReader *Reader;
FileSystemOptions FileSystemOpts;
/// \brief The AST consumer that received information about the translation
/// unit as it was parsed or loaded.
OwningPtr<ASTConsumer> Consumer;
/// \brief The semantic analysis object used to type-check the translation
/// unit.
OwningPtr<Sema> TheSema;
/// Optional owned invocation, just used to make the invocation used in
/// LoadFromCommandLine available.
IntrusiveRefCntPtr<CompilerInvocation> Invocation;
/// \brief The set of target features.
///
/// FIXME: each time we reparse, we need to restore the set of target
/// features from this vector, because TargetInfo::CreateTargetInfo()
/// mangles the target options in place. Yuck!
std::vector<std::string> TargetFeatures;
// OnlyLocalDecls - when true, walking this AST should only visit declarations
// that come from the AST itself, not from included precompiled headers.
// FIXME: This is temporary; eventually, CIndex will always do this.
bool OnlyLocalDecls;
/// \brief Whether to capture any diagnostics produced.
bool CaptureDiagnostics;
/// \brief Track whether the main file was loaded from an AST or not.
bool MainFileIsAST;
/// \brief What kind of translation unit this AST represents.
TranslationUnitKind TUKind;
/// \brief Whether we should time each operation.
bool WantTiming;
/// \brief Whether the ASTUnit should delete the remapped buffers.
bool OwnsRemappedFileBuffers;
/// Track the top-level decls which appeared in an ASTUnit which was loaded
/// from a source file.
//
// FIXME: This is just an optimization hack to avoid deserializing large parts
// of a PCH file when using the Index library on an ASTUnit loaded from
// source. In the long term we should make the Index library use efficient and
// more scalable search mechanisms.
std::vector<Decl*> TopLevelDecls;
/// \brief Sorted (by file offset) vector of pairs of file offset/Decl.
typedef SmallVector<std::pair<unsigned, Decl *>, 64> LocDeclsTy;
typedef llvm::DenseMap<FileID, LocDeclsTy *> FileDeclsTy;
/// \brief Map from FileID to the file-level declarations that it contains.
/// The files and decls are only local (and non-preamble) ones.
FileDeclsTy FileDecls;
/// The name of the original source file used to generate this ASTUnit.
std::string OriginalSourceFile;
/// \brief The set of diagnostics produced when creating the preamble.
SmallVector<StoredDiagnostic, 4> PreambleDiagnostics;
/// \brief The set of diagnostics produced when creating this
/// translation unit.
SmallVector<StoredDiagnostic, 4> StoredDiagnostics;
/// \brief The set of diagnostics produced when failing to parse, e.g. due
/// to failure to load the PCH.
SmallVector<StoredDiagnostic, 4> FailedParseDiagnostics;
/// \brief The number of stored diagnostics that come from the driver
/// itself.
///
/// Diagnostics that come from the driver are retained from one parse to
/// the next.
unsigned NumStoredDiagnosticsFromDriver;
/// \brief Counter that determines when we want to try building a
/// precompiled preamble.
///
/// If zero, we will never build a precompiled preamble. Otherwise,
/// it's treated as a counter that decrements each time we reparse
/// without the benefit of a precompiled preamble. When it hits 1,
/// we'll attempt to rebuild the precompiled header. This way, if
/// building the precompiled preamble fails, we won't try again for
/// some number of calls.
unsigned PreambleRebuildCounter;
public:
class PreambleData {
const FileEntry *File;
std::vector<char> Buffer;
mutable unsigned NumLines;
public:
PreambleData() : File(0), NumLines(0) { }
void assign(const FileEntry *F, const char *begin, const char *end) {
File = F;
Buffer.assign(begin, end);
NumLines = 0;
}
void clear() { Buffer.clear(); File = 0; NumLines = 0; }
size_t size() const { return Buffer.size(); }
bool empty() const { return Buffer.empty(); }
const char *getBufferStart() const { return &Buffer[0]; }
unsigned getNumLines() const {
if (NumLines)
return NumLines;
countLines();
return NumLines;
}
SourceRange getSourceRange(const SourceManager &SM) const {
SourceLocation FileLoc = SM.getLocForStartOfFile(SM.getPreambleFileID());
return SourceRange(FileLoc, FileLoc.getLocWithOffset(size()-1));
}
private:
void countLines() const;
};
const PreambleData &getPreambleData() const {
return Preamble;
}
private:
/// \brief The contents of the preamble that has been precompiled to
/// \c PreambleFile.
PreambleData Preamble;
/// \brief Whether the preamble ends at the start of a new line.
///
/// Used to inform the lexer as to whether it's starting at the beginning of
/// a line after skipping the preamble.
bool PreambleEndsAtStartOfLine;
/// \brief The size of the source buffer that we've reserved for the main
/// file within the precompiled preamble.
unsigned PreambleReservedSize;
/// \brief Keeps track of the files that were used when computing the
/// preamble, with both their buffer size and their modification time.
///
/// If any of the files have changed from one compile to the next,
/// the preamble must be thrown away.
llvm::StringMap<std::pair<off_t, time_t> > FilesInPreamble;
/// \brief When non-NULL, this is the buffer used to store the contents of
/// the main file when it has been padded for use with the precompiled
/// preamble.
llvm::MemoryBuffer *SavedMainFileBuffer;
/// \brief When non-NULL, this is the buffer used to store the
/// contents of the preamble when it has been padded to build the
/// precompiled preamble.
llvm::MemoryBuffer *PreambleBuffer;
/// \brief The number of warnings that occurred while parsing the preamble.
///
/// This value will be used to restore the state of the \c DiagnosticsEngine
/// object when re-using the precompiled preamble. Note that only the
/// number of warnings matters, since we will not save the preamble
/// when any errors are present.
unsigned NumWarningsInPreamble;
/// \brief A list of the serialization ID numbers for each of the top-level
/// declarations parsed within the precompiled preamble.
std::vector<serialization::DeclID> TopLevelDeclsInPreamble;
/// \brief Whether we should be caching code-completion results.
bool ShouldCacheCodeCompletionResults;
/// \brief The language options used when we load an AST file.
LangOptions ASTFileLangOpts;
static void ConfigureDiags(IntrusiveRefCntPtr<DiagnosticsEngine> &Diags,
const char **ArgBegin, const char **ArgEnd,
ASTUnit &AST, bool CaptureDiagnostics);
void TranslateStoredDiagnostics(ASTReader *MMan, StringRef ModName,
SourceManager &SrcMan,
const SmallVectorImpl<StoredDiagnostic> &Diags,
SmallVectorImpl<StoredDiagnostic> &Out);
void clearFileLevelDecls();
public:
/// \brief A cached code-completion result, which may be introduced in one of
/// many different contexts.
struct CachedCodeCompletionResult {
/// \brief The code-completion string corresponding to this completion
/// result.
CodeCompletionString *Completion;
/// \brief A bitmask that indicates which code-completion contexts should
/// contain this completion result.
///
/// The bits in the bitmask correspond to the values of
/// CodeCompleteContext::Kind. To map from a completion context kind to a
/// bit, subtract one from the completion context kind and shift 1 by that
/// number of bits. Many completions can occur in several different
/// contexts.
unsigned ShowInContexts;
/// \brief The priority given to this code-completion result.
unsigned Priority;
/// \brief The libclang cursor kind corresponding to this code-completion
/// result.
CXCursorKind Kind;
/// \brief The availability of this code-completion result.
CXAvailabilityKind Availability;
/// \brief The simplified type class for a non-macro completion result.
SimplifiedTypeClass TypeClass;
/// \brief The type of a non-macro completion result, stored as a unique
/// integer used by the string map of cached completion types.
///
/// This value will be zero if the type is not known, or a unique value
/// determined by the formatted type string. Se \c CachedCompletionTypes
/// for more information.
unsigned Type;
};
/// \brief Retrieve the mapping from formatted type names to unique type
/// identifiers.
llvm::StringMap<unsigned> &getCachedCompletionTypes() {
return CachedCompletionTypes;
}
/// \brief Retrieve the allocator used to cache global code completions.
IntrusiveRefCntPtr<GlobalCodeCompletionAllocator>
getCachedCompletionAllocator() {
return CachedCompletionAllocator;
}
CodeCompletionTUInfo &getCodeCompletionTUInfo() {
if (!CCTUInfo)
CCTUInfo.reset(new CodeCompletionTUInfo(
new GlobalCodeCompletionAllocator));
return *CCTUInfo;
}
private:
/// \brief Allocator used to store cached code completions.
IntrusiveRefCntPtr<GlobalCodeCompletionAllocator>
CachedCompletionAllocator;
OwningPtr<CodeCompletionTUInfo> CCTUInfo;
/// \brief The set of cached code-completion results.
std::vector<CachedCodeCompletionResult> CachedCompletionResults;
/// \brief A mapping from the formatted type name to a unique number for that
/// type, which is used for type equality comparisons.
llvm::StringMap<unsigned> CachedCompletionTypes;
/// \brief A string hash of the top-level declaration and macro definition
/// names processed the last time that we reparsed the file.
///
/// This hash value is used to determine when we need to refresh the
/// global code-completion cache.
unsigned CompletionCacheTopLevelHashValue;
/// \brief A string hash of the top-level declaration and macro definition
/// names processed the last time that we reparsed the precompiled preamble.
///
/// This hash value is used to determine when we need to refresh the
/// global code-completion cache after a rebuild of the precompiled preamble.
unsigned PreambleTopLevelHashValue;
/// \brief The current hash value for the top-level declaration and macro
/// definition names
unsigned CurrentTopLevelHashValue;
/// \brief Bit used by CIndex to mark when a translation unit may be in an
/// inconsistent state, and is not safe to free.
unsigned UnsafeToFree : 1;
/// \brief Cache any "global" code-completion results, so that we can avoid
/// recomputing them with each completion.
void CacheCodeCompletionResults();
/// \brief Clear out and deallocate
void ClearCachedCompletionResults();
ASTUnit(const ASTUnit&); // DO NOT IMPLEMENT
ASTUnit &operator=(const ASTUnit &); // DO NOT IMPLEMENT
explicit ASTUnit(bool MainFileIsAST);
void CleanTemporaryFiles();
bool Parse(llvm::MemoryBuffer *OverrideMainBuffer);
std::pair<llvm::MemoryBuffer *, std::pair<unsigned, bool> >
ComputePreamble(CompilerInvocation &Invocation,
unsigned MaxLines, bool &CreatedBuffer);
llvm::MemoryBuffer *getMainBufferWithPrecompiledPreamble(
const CompilerInvocation &PreambleInvocationIn,
bool AllowRebuild = true,
unsigned MaxLines = 0);
void RealizeTopLevelDeclsFromPreamble();
/// \brief Transfers ownership of the objects (like SourceManager) from
/// \param CI to this ASTUnit.
void transferASTDataFromCompilerInstance(CompilerInstance &CI);
/// \brief Allows us to assert that ASTUnit is not being used concurrently,
/// which is not supported.
///
/// Clients should create instances of the ConcurrencyCheck class whenever
/// using the ASTUnit in a way that isn't intended to be concurrent, which is
/// just about any usage.
/// Becomes a noop in release mode; only useful for debug mode checking.
class ConcurrencyState {
void *Mutex; // a llvm::sys::MutexImpl in debug;
public:
ConcurrencyState();
~ConcurrencyState();
void start();
void finish();
};
ConcurrencyState ConcurrencyCheckValue;
public:
class ConcurrencyCheck {
ASTUnit &Self;
public:
explicit ConcurrencyCheck(ASTUnit &Self)
: Self(Self)
{
Self.ConcurrencyCheckValue.start();
}
~ConcurrencyCheck() {
Self.ConcurrencyCheckValue.finish();
}
};
friend class ConcurrencyCheck;
~ASTUnit();
bool isMainFileAST() const { return MainFileIsAST; }
bool isUnsafeToFree() const { return UnsafeToFree; }
void setUnsafeToFree(bool Value) { UnsafeToFree = Value; }
const DiagnosticsEngine &getDiagnostics() const { return *Diagnostics; }
DiagnosticsEngine &getDiagnostics() { return *Diagnostics; }
const SourceManager &getSourceManager() const { return *SourceMgr; }
SourceManager &getSourceManager() { return *SourceMgr; }
const Preprocessor &getPreprocessor() const { return *PP; }
Preprocessor &getPreprocessor() { return *PP; }
const ASTContext &getASTContext() const { return *Ctx; }
ASTContext &getASTContext() { return *Ctx; }
void setASTContext(ASTContext *ctx) { Ctx = ctx; }
void setPreprocessor(Preprocessor *pp);
bool hasSema() const { return TheSema; }
Sema &getSema() const {
assert(TheSema && "ASTUnit does not have a Sema object!");
return *TheSema;
}
const FileManager &getFileManager() const { return *FileMgr; }
FileManager &getFileManager() { return *FileMgr; }
const FileSystemOptions &getFileSystemOpts() const { return FileSystemOpts; }
const std::string &getOriginalSourceFileName();
/// \brief Add a temporary file that the ASTUnit depends on.
///
/// This file will be erased when the ASTUnit is destroyed.
void addTemporaryFile(const llvm::sys::Path &TempFile);
bool getOnlyLocalDecls() const { return OnlyLocalDecls; }
bool getOwnsRemappedFileBuffers() const { return OwnsRemappedFileBuffers; }
void setOwnsRemappedFileBuffers(bool val) { OwnsRemappedFileBuffers = val; }
StringRef getMainFileName() const;
typedef std::vector<Decl *>::iterator top_level_iterator;
top_level_iterator top_level_begin() {
assert(!isMainFileAST() && "Invalid call for AST based ASTUnit!");
if (!TopLevelDeclsInPreamble.empty())
RealizeTopLevelDeclsFromPreamble();
return TopLevelDecls.begin();
}
top_level_iterator top_level_end() {
assert(!isMainFileAST() && "Invalid call for AST based ASTUnit!");
if (!TopLevelDeclsInPreamble.empty())
RealizeTopLevelDeclsFromPreamble();
return TopLevelDecls.end();
}
std::size_t top_level_size() const {
assert(!isMainFileAST() && "Invalid call for AST based ASTUnit!");
return TopLevelDeclsInPreamble.size() + TopLevelDecls.size();
}
bool top_level_empty() const {
assert(!isMainFileAST() && "Invalid call for AST based ASTUnit!");
return TopLevelDeclsInPreamble.empty() && TopLevelDecls.empty();
}
/// \brief Add a new top-level declaration.
void addTopLevelDecl(Decl *D) {
TopLevelDecls.push_back(D);
}
/// \brief Add a new local file-level declaration.
void addFileLevelDecl(Decl *D);
/// \brief Get the decls that are contained in a file in the Offset/Length
/// range. \arg Length can be 0 to indicate a point at \arg Offset instead of
/// a range.
void findFileRegionDecls(FileID File, unsigned Offset, unsigned Length,
SmallVectorImpl<Decl *> &Decls);
/// \brief Add a new top-level declaration, identified by its ID in
/// the precompiled preamble.
void addTopLevelDeclFromPreamble(serialization::DeclID D) {
TopLevelDeclsInPreamble.push_back(D);
}
/// \brief Retrieve a reference to the current top-level name hash value.
///
/// Note: This is used internally by the top-level tracking action
unsigned &getCurrentTopLevelHashValue() { return CurrentTopLevelHashValue; }
/// \brief Get the source location for the given file:line:col triplet.
///
/// The difference with SourceManager::getLocation is that this method checks
/// whether the requested location points inside the precompiled preamble
/// in which case the returned source location will be a "loaded" one.
SourceLocation getLocation(const FileEntry *File,
unsigned Line, unsigned Col) const;
/// \brief Get the source location for the given file:offset pair.
SourceLocation getLocation(const FileEntry *File, unsigned Offset) const;
/// \brief If \arg Loc is a loaded location from the preamble, returns
/// the corresponding local location of the main file, otherwise it returns
/// \arg Loc.
SourceLocation mapLocationFromPreamble(SourceLocation Loc);
/// \brief If \arg Loc is a local location of the main file but inside the
/// preamble chunk, returns the corresponding loaded location from the
/// preamble, otherwise it returns \arg Loc.
SourceLocation mapLocationToPreamble(SourceLocation Loc);
bool isInPreambleFileID(SourceLocation Loc);
bool isInMainFileID(SourceLocation Loc);
SourceLocation getStartOfMainFileID();
SourceLocation getEndOfPreambleFileID();
/// \brief \see mapLocationFromPreamble.
SourceRange mapRangeFromPreamble(SourceRange R) {
return SourceRange(mapLocationFromPreamble(R.getBegin()),
mapLocationFromPreamble(R.getEnd()));
}
/// \brief \see mapLocationToPreamble.
SourceRange mapRangeToPreamble(SourceRange R) {
return SourceRange(mapLocationToPreamble(R.getBegin()),
mapLocationToPreamble(R.getEnd()));
}
// Retrieve the diagnostics associated with this AST
typedef StoredDiagnostic *stored_diag_iterator;
typedef const StoredDiagnostic *stored_diag_const_iterator;
stored_diag_const_iterator stored_diag_begin() const {
return StoredDiagnostics.begin();
}
stored_diag_iterator stored_diag_begin() {
return StoredDiagnostics.begin();
}
stored_diag_const_iterator stored_diag_end() const {
return StoredDiagnostics.end();
}
stored_diag_iterator stored_diag_end() {
return StoredDiagnostics.end();
}
unsigned stored_diag_size() const { return StoredDiagnostics.size(); }
stored_diag_iterator stored_diag_afterDriver_begin() {
if (NumStoredDiagnosticsFromDriver > StoredDiagnostics.size())
NumStoredDiagnosticsFromDriver = 0;
return StoredDiagnostics.begin() + NumStoredDiagnosticsFromDriver;
}
typedef std::vector<CachedCodeCompletionResult>::iterator
cached_completion_iterator;
cached_completion_iterator cached_completion_begin() {
return CachedCompletionResults.begin();
}
cached_completion_iterator cached_completion_end() {
return CachedCompletionResults.end();
}
unsigned cached_completion_size() const {
return CachedCompletionResults.size();
}
llvm::MemoryBuffer *getBufferForFile(StringRef Filename,
std::string *ErrorStr = 0);
/// \brief Determine what kind of translation unit this AST represents.
TranslationUnitKind getTranslationUnitKind() const { return TUKind; }
typedef llvm::PointerUnion<const char *, const llvm::MemoryBuffer *>
FilenameOrMemBuf;
/// \brief A mapping from a file name to the memory buffer that stores the
/// remapped contents of that file.
typedef std::pair<std::string, FilenameOrMemBuf> RemappedFile;
/// \brief Create a ASTUnit. Gets ownership of the passed CompilerInvocation.
static ASTUnit *create(CompilerInvocation *CI,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
bool CaptureDiagnostics = false);
/// \brief Create a ASTUnit from an AST file.
///
/// \param Filename - The AST file to load.
///
/// \param Diags - The diagnostics engine to use for reporting errors; its
/// lifetime is expected to extend past that of the returned ASTUnit.
///
/// \returns - The initialized ASTUnit or null if the AST failed to load.
static ASTUnit *LoadFromASTFile(const std::string &Filename,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
const FileSystemOptions &FileSystemOpts,
bool OnlyLocalDecls = false,
RemappedFile *RemappedFiles = 0,
unsigned NumRemappedFiles = 0,
bool CaptureDiagnostics = false,
bool AllowPCHWithCompilerErrors = false);
private:
/// \brief Helper function for \c LoadFromCompilerInvocation() and
/// \c LoadFromCommandLine(), which loads an AST from a compiler invocation.
///
/// \param PrecompilePreamble Whether to precompile the preamble of this
/// translation unit, to improve the performance of reparsing.
///
/// \returns \c true if a catastrophic failure occurred (which means that the
/// \c ASTUnit itself is invalid), or \c false otherwise.
bool LoadFromCompilerInvocation(bool PrecompilePreamble);
public:
/// \brief Create an ASTUnit from a source file, via a CompilerInvocation
/// object, by invoking the optionally provided ASTFrontendAction.
///
/// \param CI - The compiler invocation to use; it must have exactly one input
/// source file. The ASTUnit takes ownership of the CompilerInvocation object.
///
/// \param Diags - The diagnostics engine to use for reporting errors; its
/// lifetime is expected to extend past that of the returned ASTUnit.
///
/// \param Action - The ASTFrontendAction to invoke. Its ownership is not
/// transfered.
///
/// \param Unit - optionally an already created ASTUnit. Its ownership is not
/// transfered.
///
/// \param Persistent - if true the returned ASTUnit will be complete.
/// false means the caller is only interested in getting info through the
/// provided \see Action.
///
/// \param ErrAST - If non-null and parsing failed without any AST to return
/// (e.g. because the PCH could not be loaded), this accepts the ASTUnit
/// mainly to allow the caller to see the diagnostics.
/// This will only receive an ASTUnit if a new one was created. If an already
/// created ASTUnit was passed in \param Unit then the caller can check that.
///
static ASTUnit *LoadFromCompilerInvocationAction(CompilerInvocation *CI,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
ASTFrontendAction *Action = 0,
ASTUnit *Unit = 0,
bool Persistent = true,
StringRef ResourceFilesPath = StringRef(),
bool OnlyLocalDecls = false,
bool CaptureDiagnostics = false,
bool PrecompilePreamble = false,
bool CacheCodeCompletionResults = false,
OwningPtr<ASTUnit> *ErrAST = 0);
/// LoadFromCompilerInvocation - Create an ASTUnit from a source file, via a
/// CompilerInvocation object.
///
/// \param CI - The compiler invocation to use; it must have exactly one input
/// source file. The ASTUnit takes ownership of the CompilerInvocation object.
///
/// \param Diags - The diagnostics engine to use for reporting errors; its
/// lifetime is expected to extend past that of the returned ASTUnit.
//
// FIXME: Move OnlyLocalDecls, UseBumpAllocator to setters on the ASTUnit, we
// shouldn't need to specify them at construction time.
static ASTUnit *LoadFromCompilerInvocation(CompilerInvocation *CI,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
bool OnlyLocalDecls = false,
bool CaptureDiagnostics = false,
bool PrecompilePreamble = false,
TranslationUnitKind TUKind = TU_Complete,
bool CacheCodeCompletionResults = false);
/// LoadFromCommandLine - Create an ASTUnit from a vector of command line
/// arguments, which must specify exactly one source file.
///
/// \param ArgBegin - The beginning of the argument vector.
///
/// \param ArgEnd - The end of the argument vector.
///
/// \param Diags - The diagnostics engine to use for reporting errors; its
/// lifetime is expected to extend past that of the returned ASTUnit.
///
/// \param ResourceFilesPath - The path to the compiler resource files.
///
/// \param ErrAST - If non-null and parsing failed without any AST to return
/// (e.g. because the PCH could not be loaded), this accepts the ASTUnit
/// mainly to allow the caller to see the diagnostics.
///
// FIXME: Move OnlyLocalDecls, UseBumpAllocator to setters on the ASTUnit, we
// shouldn't need to specify them at construction time.
static ASTUnit *LoadFromCommandLine(const char **ArgBegin,
const char **ArgEnd,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
StringRef ResourceFilesPath,
bool OnlyLocalDecls = false,
bool CaptureDiagnostics = false,
RemappedFile *RemappedFiles = 0,
unsigned NumRemappedFiles = 0,
bool RemappedFilesKeepOriginalName = true,
bool PrecompilePreamble = false,
TranslationUnitKind TUKind = TU_Complete,
bool CacheCodeCompletionResults = false,
bool AllowPCHWithCompilerErrors = false,
bool SkipFunctionBodies = false,
OwningPtr<ASTUnit> *ErrAST = 0);
/// \brief Reparse the source files using the same command-line options that
/// were originally used to produce this translation unit.
///
/// \returns True if a failure occurred that causes the ASTUnit not to
/// contain any translation-unit information, false otherwise.
bool Reparse(RemappedFile *RemappedFiles = 0,
unsigned NumRemappedFiles = 0);
/// \brief Perform code completion at the given file, line, and
/// column within this translation unit.
///
/// \param File The file in which code completion will occur.
///
/// \param Line The line at which code completion will occur.
///
/// \param Column The column at which code completion will occur.
///
/// \param IncludeMacros Whether to include macros in the code-completion
/// results.
///
/// \param IncludeCodePatterns Whether to include code patterns (such as a
/// for loop) in the code-completion results.
///
/// FIXME: The Diag, LangOpts, SourceMgr, FileMgr, StoredDiagnostics, and
/// OwnedBuffers parameters are all disgusting hacks. They will go away.
void CodeComplete(StringRef File, unsigned Line, unsigned Column,
RemappedFile *RemappedFiles, unsigned NumRemappedFiles,
bool IncludeMacros, bool IncludeCodePatterns,
CodeCompleteConsumer &Consumer,
DiagnosticsEngine &Diag, LangOptions &LangOpts,
SourceManager &SourceMgr, FileManager &FileMgr,
SmallVectorImpl<StoredDiagnostic> &StoredDiagnostics,
SmallVectorImpl<const llvm::MemoryBuffer *> &OwnedBuffers);
/// \brief Save this translation unit to a file with the given name.
///
/// \returns An indication of whether the save was successful or not.
CXSaveError Save(StringRef File);
/// \brief Serialize this translation unit with the given output stream.
///
/// \returns True if an error occurred, false otherwise.
bool serialize(raw_ostream &OS);
virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
Module::NameVisibilityKind Visibility,
bool IsInclusionDirective) {
// ASTUnit doesn't know how to load modules (not that this matters).
return 0;
}
};
} // namespace clang
#endif