1 //===- PreprocessorOptions.h ------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
11 #define LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
13 #include "clang/Basic/LLVM.h"
14 #include "llvm/ADT/StringRef.h"
15 #include "llvm/ADT/StringSet.h"
30 /// Enumerate the kinds of standard library that
31 enum ObjCXXARCStandardLibraryKind {
41 /// PreprocessorOptions - This class is used for passing the various options
42 /// used in preprocessor initialization to InitializePreprocessor().
43 class PreprocessorOptions {
45 std::vector<std::pair<std::string, bool/*isUndef*/>> Macros;
46 std::vector<std::string> Includes;
47 std::vector<std::string> MacroIncludes;
49 /// Initialize the preprocessor with the compiler and target specific
51 bool UsePredefines = true;
53 /// Whether we should maintain a detailed record of all macro
54 /// definitions and expansions.
55 bool DetailedRecord = false;
57 /// If non-empty, the filename used in an #include directive in the primary
58 /// source file (or command-line preinclude) that is used to implement
59 /// MSVC-style precompiled headers. When creating a PCH, after the #include
60 /// of this header, the PCH generation stops. When using a PCH, tokens are
61 /// skipped until after an #include of this header is seen.
62 std::string PCHThroughHeader;
64 /// The implicit PCH included at the start of the translation unit, or empty.
65 std::string ImplicitPCHInclude;
67 /// Headers that will be converted to chained PCHs in memory.
68 std::vector<std::string> ChainedIncludes;
70 /// When true, disables most of the normal validation performed on
71 /// precompiled headers.
72 bool DisablePCHValidation = false;
74 /// When true, a PCH with compiler errors will not be rejected.
75 bool AllowPCHWithCompilerErrors = false;
77 /// Dump declarations that are deserialized from PCH, for testing.
78 bool DumpDeserializedPCHDecls = false;
80 /// This is a set of names for decls that we do not want to be
81 /// deserialized, and we emit an error if they are; for testing purposes.
82 std::set<std::string> DeserializedPCHDeclsToErrorOn;
84 /// If non-zero, the implicit PCH include is actually a precompiled
85 /// preamble that covers this number of bytes in the main source file.
87 /// The boolean indicates whether the preamble ends at the start of a new
89 std::pair<unsigned, bool> PrecompiledPreambleBytes;
91 /// True indicates that a preamble is being generated.
93 /// When the lexer is done, one of the things that need to be preserved is the
94 /// conditional #if stack, so the ASTWriter/ASTReader can save/restore it when
95 /// processing the rest of the file.
96 bool GeneratePreamble = false;
98 /// Whether to write comment locations into the PCH when building it.
99 /// Reading the comments from the PCH can be a performance hit even if the
100 /// clients don't use them.
101 bool WriteCommentListToPCH = true;
103 /// The implicit PTH input included at the start of the translation unit, or
105 std::string ImplicitPTHInclude;
107 /// If given, a PTH cache file to use for speeding up header parsing.
108 std::string TokenCache;
110 /// When enabled, preprocessor is in a mode for parsing a single file only.
112 /// Disables #includes of other files and if there are unresolved identifiers
113 /// in preprocessor directive conditions it causes all blocks to be parsed so
114 /// that the client can get the maximum amount of information from the parser.
115 bool SingleFileParseMode = false;
117 /// When enabled, the preprocessor will construct editor placeholder tokens.
118 bool LexEditorPlaceholders = true;
120 /// True if the SourceManager should report the original file name for
121 /// contents of files that were remapped to other files. Defaults to true.
122 bool RemappedFilesKeepOriginalName = true;
124 /// The set of file remappings, which take existing files on
125 /// the system (the first part of each pair) and gives them the
126 /// contents of other files on the system (the second part of each
128 std::vector<std::pair<std::string, std::string>> RemappedFiles;
130 /// The set of file-to-buffer remappings, which take existing files
131 /// on the system (the first part of each pair) and gives them the contents
132 /// of the specified memory buffer (the second part of each pair).
133 std::vector<std::pair<std::string, llvm::MemoryBuffer *>> RemappedFileBuffers;
135 /// Whether the compiler instance should retain (i.e., not free)
136 /// the buffers associated with remapped files.
138 /// This flag defaults to false; it can be set true only through direct
139 /// manipulation of the compiler invocation object, in cases where the
140 /// compiler invocation and its buffers will be reused.
141 bool RetainRemappedFileBuffers = false;
143 /// The Objective-C++ ARC standard library that we should support,
144 /// by providing appropriate definitions to retrofit the standard library
145 /// with support for lifetime-qualified pointers.
146 ObjCXXARCStandardLibraryKind ObjCXXARCStandardLibrary = ARCXX_nolib;
148 /// Records the set of modules
149 class FailedModulesSet {
150 llvm::StringSet<> Failed;
153 bool hasAlreadyFailed(StringRef module) {
154 return Failed.count(module) > 0;
157 void addFailed(StringRef module) {
158 Failed.insert(module);
162 /// The set of modules that failed to build.
164 /// This pointer will be shared among all of the compiler instances created
165 /// to (re)build modules, so that once a module fails to build anywhere,
166 /// other instances will see that the module has failed and won't try to
168 std::shared_ptr<FailedModulesSet> FailedModules;
171 PreprocessorOptions() : PrecompiledPreambleBytes(0, false) {}
173 void addMacroDef(StringRef Name) { Macros.emplace_back(Name, false); }
174 void addMacroUndef(StringRef Name) { Macros.emplace_back(Name, true); }
176 void addRemappedFile(StringRef From, StringRef To) {
177 RemappedFiles.emplace_back(From, To);
180 void addRemappedFile(StringRef From, llvm::MemoryBuffer *To) {
181 RemappedFileBuffers.emplace_back(From, To);
184 void clearRemappedFiles() {
185 RemappedFiles.clear();
186 RemappedFileBuffers.clear();
189 /// Reset any options that are not considered when building a
191 void resetNonModularOptions() {
193 MacroIncludes.clear();
194 ChainedIncludes.clear();
195 DumpDeserializedPCHDecls = false;
196 ImplicitPCHInclude.clear();
197 ImplicitPTHInclude.clear();
199 SingleFileParseMode = false;
200 LexEditorPlaceholders = true;
201 RetainRemappedFileBuffers = true;
202 PrecompiledPreambleBytes.first = 0;
203 PrecompiledPreambleBytes.second = false;
209 #endif // LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_