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 /*===-- clang-c/Index.h - Indexing Public C Interface -------------*- C -*-===*\ |* *| |* The LLVM Compiler Infrastructure *| |* *| |* This file is distributed under the University of Illinois Open Source *| |* License. See LICENSE.TXT for details. *| |* *| |*===----------------------------------------------------------------------===*| |* *| |* This header provides a public inferface to a Clang library for extracting *| |* high-level symbol information from source files without exposing the full *| |* Clang C++ API. *| |* *| \*===----------------------------------------------------------------------===*/ #ifndef CLANG_C_INDEX_H #define CLANG_C_INDEX_H #include #include #include #ifdef __cplusplus extern "C" { #endif /* MSVC DLL import/export. */ #ifdef _MSC_VER #ifdef _CINDEX_LIB_ #define CINDEX_LINKAGE __declspec(dllexport) #else #define CINDEX_LINKAGE __declspec(dllimport) #endif #else #define CINDEX_LINKAGE #endif /** \defgroup CINDEX C Interface to Clang * * The C Interface to Clang provides a relatively small API that exposes * facilities for parsing source code into an abstract syntax tree (AST), * loading already-parsed ASTs, traversing the AST, associating * physical source locations with elements within the AST, and other * facilities that support Clang-based development tools. * * This C interface to Clang will never provide all of the information * representation stored in Clang's C++ AST, nor should it: the intent is to * maintain an API that is relatively stable from one release to the next, * providing only the basic functionality needed to support development tools. * * To avoid namespace pollution, data types are prefixed with "CX" and * functions are prefixed with "clang_". * * @{ */ /** * \brief An "index" that consists of a set of translation units that would * typically be linked together into an executable or library. */ typedef void *CXIndex; /** * \brief A single translation unit, which resides in an index. */ typedef void *CXTranslationUnit; /* A translation unit instance. */ /** * \brief Opaque pointer representing client data that will be passed through * to various callbacks and visitors. */ typedef void *CXClientData; /** * \brief Provides the contents of a file that has not yet been saved to disk. * * Each CXUnsavedFile instance provides the name of a file on the * system along with the current contents of that file that have not * yet been saved to disk. */ struct CXUnsavedFile { /** * \brief The file whose contents have not yet been saved. * * This file must already exist in the file system. */ const char *Filename; /** * \brief A buffer containing the unsaved contents of this file. */ const char *Contents; /** * \brief The length of the unsaved contents of this buffer. */ unsigned long Length; }; /** * \defgroup CINDEX_STRING String manipulation routines * * @{ */ /** * \brief A character string. * * The \c CXString type is used to return strings from the interface when * the ownership of that string might different from one call to the next. * Use \c clang_getCString() to retrieve the string data and, once finished * with the string data, call \c clang_disposeString() to free the string. */ typedef struct { const char *Spelling; /* A 1 value indicates the clang_ indexing API needed to allocate the string (and it must be freed by clang_disposeString()). */ int MustFreeString; } CXString; /** * \brief Retrieve the character data associated with the given string. */ CINDEX_LINKAGE const char *clang_getCString(CXString string); /** * \brief Free the given string, */ CINDEX_LINKAGE void clang_disposeString(CXString string); /** * @} */ /** * \brief clang_createIndex() provides a shared context for creating * translation units. It provides two options: * * - excludeDeclarationsFromPCH: When non-zero, allows enumeration of "local" * declarations (when loading any new translation units). A "local" declaration * is one that belongs in the translation unit itself and not in a precompiled * header that was used by the translation unit. If zero, all declarations * will be enumerated. * * Here is an example: * * // excludeDeclsFromPCH = 1, displayDiagnostics=1 * Idx = clang_createIndex(1, 1); * * // IndexTest.pch was produced with the following command: * // "clang -x c IndexTest.h -emit-ast -o IndexTest.pch" * TU = clang_createTranslationUnit(Idx, "IndexTest.pch"); * * // This will load all the symbols from 'IndexTest.pch' * clang_visitChildren(clang_getTranslationUnitCursor(TU), * TranslationUnitVisitor, 0); * clang_disposeTranslationUnit(TU); * * // This will load all the symbols from 'IndexTest.c', excluding symbols * // from 'IndexTest.pch'. * char *args[] = { "-Xclang", "-include-pch=IndexTest.pch" }; * TU = clang_createTranslationUnitFromSourceFile(Idx, "IndexTest.c", 2, args, * 0, 0); * clang_visitChildren(clang_getTranslationUnitCursor(TU), * TranslationUnitVisitor, 0); * clang_disposeTranslationUnit(TU); * * This process of creating the 'pch', loading it separately, and using it (via * -include-pch) allows 'excludeDeclsFromPCH' to remove redundant callbacks * (which gives the indexer the same performance benefit as the compiler). */ CINDEX_LINKAGE CXIndex clang_createIndex(int excludeDeclarationsFromPCH, int displayDiagnostics); /** * \brief Destroy the given index. * * The index must not be destroyed until all of the translation units created * within that index have been destroyed. */ CINDEX_LINKAGE void clang_disposeIndex(CXIndex index); /** * \brief Request that AST's be generated externally for API calls which parse * source code on the fly, e.g. \see createTranslationUnitFromSourceFile. * * Note: This is for debugging purposes only, and may be removed at a later * date. * * \param index - The index to update. * \param value - The new flag value. */ CINDEX_LINKAGE void clang_setUseExternalASTGeneration(CXIndex index, int value); /** * \defgroup CINDEX_FILES File manipulation routines * * @{ */ /** * \brief A particular source file that is part of a translation unit. */ typedef void *CXFile; /** * \brief Retrieve the complete file and path name of the given file. */ CINDEX_LINKAGE CXString clang_getFileName(CXFile SFile); /** * \brief Retrieve the last modification time of the given file. */ CINDEX_LINKAGE time_t clang_getFileTime(CXFile SFile); /** * \brief Retrieve a file handle within the given translation unit. * * \param tu the translation unit * * \param file_name the name of the file. * * \returns the file handle for the named file in the translation unit \p tu, * or a NULL file handle if the file was not a part of this translation unit. */ CINDEX_LINKAGE CXFile clang_getFile(CXTranslationUnit tu, const char *file_name); /** * @} */ /** * \defgroup CINDEX_LOCATIONS Physical source locations * * Clang represents physical source locations in its abstract syntax tree in * great detail, with file, line, and column information for the majority of * the tokens parsed in the source code. These data types and functions are * used to represent source location information, either for a particular * point in the program or for a range of points in the program, and extract * specific location information from those data types. * * @{ */ /** * \brief Identifies a specific source location within a translation * unit. * * Use clang_getInstantiationLocation() to map a source location to a * particular file, line, and column. */ typedef struct { void *ptr_data[2]; unsigned int_data; } CXSourceLocation; /** * \brief Identifies a half-open character range in the source code. * * Use clang_getRangeStart() and clang_getRangeEnd() to retrieve the * starting and end locations from a source range, respectively. */ typedef struct { void *ptr_data[2]; unsigned begin_int_data; unsigned end_int_data; } CXSourceRange; /** * \brief Retrieve a NULL (invalid) source location. */ CINDEX_LINKAGE CXSourceLocation clang_getNullLocation(); /** * \determine Determine whether two source locations, which must refer into * the same translation unit, refer to exactly the same point in the source * code. * * \returns non-zero if the source locations refer to the same location, zero * if they refer to different locations. */ CINDEX_LINKAGE unsigned clang_equalLocations(CXSourceLocation loc1, CXSourceLocation loc2); /** * \brief Retrieves the source location associated with a given file/line/column * in a particular translation unit. */ CINDEX_LINKAGE CXSourceLocation clang_getLocation(CXTranslationUnit tu, CXFile file, unsigned line, unsigned column); /** * \brief Retrieve a NULL (invalid) source range. */ CINDEX_LINKAGE CXSourceRange clang_getNullRange(); /** * \brief Retrieve a source range given the beginning and ending source * locations. */ CINDEX_LINKAGE CXSourceRange clang_getRange(CXSourceLocation begin, CXSourceLocation end); /** * \brief Retrieve the file, line, column, and offset represented by * the given source location. * * \param location the location within a source file that will be decomposed * into its parts. * * \param file [out] if non-NULL, will be set to the file to which the given * source location points. * * \param line [out] if non-NULL, will be set to the line to which the given * source location points. * * \param column [out] if non-NULL, will be set to the column to which the given * source location points. * * \param offset [out] if non-NULL, will be set to the offset into the * buffer to which the given source location points. */ CINDEX_LINKAGE void clang_getInstantiationLocation(CXSourceLocation location, CXFile *file, unsigned *line, unsigned *column, unsigned *offset); /** * \brief Retrieve a source location representing the first character within a * source range. */ CINDEX_LINKAGE CXSourceLocation clang_getRangeStart(CXSourceRange range); /** * \brief Retrieve a source location representing the last character within a * source range. */ CINDEX_LINKAGE CXSourceLocation clang_getRangeEnd(CXSourceRange range); /** * @} */ /** * \defgroup CINDEX_DIAG Diagnostic reporting * * @{ */ /** * \brief Describes the severity of a particular diagnostic. */ enum CXDiagnosticSeverity { /** * \brief A diagnostic that has been suppressed, e.g., by a command-line * option. */ CXDiagnostic_Ignored = 0, /** * \brief This diagnostic is a note that should be attached to the * previous (non-note) diagnostic. */ CXDiagnostic_Note = 1, /** * \brief This diagnostic indicates suspicious code that may not be * wrong. */ CXDiagnostic_Warning = 2, /** * \brief This diagnostic indicates that the code is ill-formed. */ CXDiagnostic_Error = 3, /** * \brief This diagnostic indicates that the code is ill-formed such * that future parser recovery is unlikely to produce useful * results. */ CXDiagnostic_Fatal = 4 }; /** * \brief A single diagnostic, containing the diagnostic's severity, * location, text, source ranges, and fix-it hints. */ typedef void *CXDiagnostic; /** * \brief Determine the number of diagnostics produced for the given * translation unit. */ CINDEX_LINKAGE unsigned clang_getNumDiagnostics(CXTranslationUnit Unit); /** * \brief Retrieve a diagnostic associated with the given translation unit. * * \param Unit the translation unit to query. * \param Index the zero-based diagnostic number to retrieve. * * \returns the requested diagnostic. This diagnostic must be freed * via a call to \c clang_disposeDiagnostic(). */ CINDEX_LINKAGE CXDiagnostic clang_getDiagnostic(CXTranslationUnit Unit, unsigned Index); /** * \brief Destroy a diagnostic. */ CINDEX_LINKAGE void clang_disposeDiagnostic(CXDiagnostic Diagnostic); /** * \brief Options to control the display of diagnostics. * * The values in this enum are meant to be combined to customize the * behavior of \c clang_displayDiagnostic(). */ enum CXDiagnosticDisplayOptions { /** * \brief Display the source-location information where the * diagnostic was located. * * When set, diagnostics will be prefixed by the file, line, and * (optionally) column to which the diagnostic refers. For example, * * \code * test.c:28: warning: extra tokens at end of #endif directive * \endcode * * This option corresponds to the clang flag \c -fshow-source-location. */ CXDiagnostic_DisplaySourceLocation = 0x01, /** * \brief If displaying the source-location information of the * diagnostic, also include the column number. * * This option corresponds to the clang flag \c -fshow-column. */ CXDiagnostic_DisplayColumn = 0x02, /** * \brief If displaying the source-location information of the * diagnostic, also include information about source ranges in a * machine-parsable format. * * This option corresponds to the clang flag * \c -fdiagnostics-print-source-range-info. */ CXDiagnostic_DisplaySourceRanges = 0x04 }; /** * \brief Format the given diagnostic in a manner that is suitable for display. * * This routine will format the given diagnostic to a string, rendering * the diagnostic according to the various options given. The * \c clang_defaultDiagnosticDisplayOptions() function returns the set of * options that most closely mimics the behavior of the clang compiler. * * \param Diagnostic The diagnostic to print. * * \param Options A set of options that control the diagnostic display, * created by combining \c CXDiagnosticDisplayOptions values. * * \returns A new string containing for formatted diagnostic. */ CINDEX_LINKAGE CXString clang_formatDiagnostic(CXDiagnostic Diagnostic, unsigned Options); /** * \brief Retrieve the set of display options most similar to the * default behavior of the clang compiler. * * \returns A set of display options suitable for use with \c * clang_displayDiagnostic(). */ CINDEX_LINKAGE unsigned clang_defaultDiagnosticDisplayOptions(void); /** * \brief Print a diagnostic to the given file. */ /** * \brief Determine the severity of the given diagnostic. */ CINDEX_LINKAGE enum CXDiagnosticSeverity clang_getDiagnosticSeverity(CXDiagnostic); /** * \brief Retrieve the source location of the given diagnostic. * * This location is where Clang would print the caret ('^') when * displaying the diagnostic on the command line. */ CINDEX_LINKAGE CXSourceLocation clang_getDiagnosticLocation(CXDiagnostic); /** * \brief Retrieve the text of the given diagnostic. */ CINDEX_LINKAGE CXString clang_getDiagnosticSpelling(CXDiagnostic); /** * \brief Determine the number of source ranges associated with the given * diagnostic. */ CINDEX_LINKAGE unsigned clang_getDiagnosticNumRanges(CXDiagnostic); /** * \brief Retrieve a source range associated with the diagnostic. * * A diagnostic's source ranges highlight important elements in the source * code. On the command line, Clang displays source ranges by * underlining them with '~' characters. * * \param Diagnostic the diagnostic whose range is being extracted. * * \param Range the zero-based index specifying which range to * * \returns the requested source range. */ CINDEX_LINKAGE CXSourceRange clang_getDiagnosticRange(CXDiagnostic Diagnostic, unsigned Range); /** * \brief Determine the number of fix-it hints associated with the * given diagnostic. */ CINDEX_LINKAGE unsigned clang_getDiagnosticNumFixIts(CXDiagnostic Diagnostic); /** * \brief Retrieve the replacement information for a given fix-it. * * Fix-its are described in terms of a source range whose contents * should be replaced by a string. This approach generalizes over * three kinds of operations: removal of source code (the range covers * the code to be removed and the replacement string is empty), * replacement of source code (the range covers the code to be * replaced and the replacement string provides the new code), and * insertion (both the start and end of the range point at the * insertion location, and the replacement string provides the text to * insert). * * \param Diagnostic The diagnostic whose fix-its are being queried. * * \param FixIt The zero-based index of the fix-it. * * \param ReplacementRange The source range whose contents will be * replaced with the returned replacement string. Note that source * ranges are half-open ranges [a, b), so the source code should be * replaced from a and up to (but not including) b. * * \returns A string containing text that should be replace the source * code indicated by the \c ReplacementRange. */ CINDEX_LINKAGE CXString clang_getDiagnosticFixIt(CXDiagnostic Diagnostic, unsigned FixIt, CXSourceRange *ReplacementRange); /** * @} */ /** * \defgroup CINDEX_TRANSLATION_UNIT Translation unit manipulation * * The routines in this group provide the ability to create and destroy * translation units from files, either by parsing the contents of the files or * by reading in a serialized representation of a translation unit. * * @{ */ /** * \brief Get the original translation unit source file name. */ CINDEX_LINKAGE CXString clang_getTranslationUnitSpelling(CXTranslationUnit CTUnit); /** * \brief Return the CXTranslationUnit for a given source file and the provided * command line arguments one would pass to the compiler. * * Note: The 'source_filename' argument is optional. If the caller provides a * NULL pointer, the name of the source file is expected to reside in the * specified command line arguments. * * Note: When encountered in 'clang_command_line_args', the following options * are ignored: * * '-c' * '-emit-ast' * '-fsyntax-only' * '-o ' (both '-o' and '' are ignored) * * * \param source_filename - The name of the source file to load, or NULL if the * source file is included in clang_command_line_args. * * \param num_unsaved_files the number of unsaved file entries in \p * unsaved_files. * * \param unsaved_files the files that have not yet been saved to disk * but may be required for code completion, including the contents of * those files. * * \param diag_callback callback function that will receive any diagnostics * emitted while processing this source file. If NULL, diagnostics will be * suppressed. * * \param diag_client_data client data that will be passed to the diagnostic * callback function. */ CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnitFromSourceFile( CXIndex CIdx, const char *source_filename, int num_clang_command_line_args, const char **clang_command_line_args, unsigned num_unsaved_files, struct CXUnsavedFile *unsaved_files); /** * \brief Create a translation unit from an AST file (-emit-ast). */ CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnit(CXIndex, const char *ast_filename); /** * \brief Destroy the specified CXTranslationUnit object. */ CINDEX_LINKAGE void clang_disposeTranslationUnit(CXTranslationUnit); /** * @} */ /** * \brief Describes the kind of entity that a cursor refers to. */ enum CXCursorKind { /* Declarations */ CXCursor_FirstDecl = 1, /** * \brief A declaration whose specific kind is not exposed via this * interface. * * Unexposed declarations have the same operations as any other kind * of declaration; one can extract their location information, * spelling, find their definitions, etc. However, the specific kind * of the declaration is not reported. */ CXCursor_UnexposedDecl = 1, /** \brief A C or C++ struct. */ CXCursor_StructDecl = 2, /** \brief A C or C++ union. */ CXCursor_UnionDecl = 3, /** \brief A C++ class. */ CXCursor_ClassDecl = 4, /** \brief An enumeration. */ CXCursor_EnumDecl = 5, /** * \brief A field (in C) or non-static data member (in C++) in a * struct, union, or C++ class. */ CXCursor_FieldDecl = 6, /** \brief An enumerator constant. */ CXCursor_EnumConstantDecl = 7, /** \brief A function. */ CXCursor_FunctionDecl = 8, /** \brief A variable. */ CXCursor_VarDecl = 9, /** \brief A function or method parameter. */ CXCursor_ParmDecl = 10, /** \brief An Objective-C @interface. */ CXCursor_ObjCInterfaceDecl = 11, /** \brief An Objective-C @interface for a category. */ CXCursor_ObjCCategoryDecl = 12, /** \brief An Objective-C @protocol declaration. */ CXCursor_ObjCProtocolDecl = 13, /** \brief An Objective-C @property declaration. */ CXCursor_ObjCPropertyDecl = 14, /** \brief An Objective-C instance variable. */ CXCursor_ObjCIvarDecl = 15, /** \brief An Objective-C instance method. */ CXCursor_ObjCInstanceMethodDecl = 16, /** \brief An Objective-C class method. */ CXCursor_ObjCClassMethodDecl = 17, /** \brief An Objective-C @implementation. */ CXCursor_ObjCImplementationDecl = 18, /** \brief An Objective-C @implementation for a category. */ CXCursor_ObjCCategoryImplDecl = 19, /** \brief A typedef */ CXCursor_TypedefDecl = 20, CXCursor_LastDecl = 20, /* References */ CXCursor_FirstRef = 40, /* Decl references */ CXCursor_ObjCSuperClassRef = 40, CXCursor_ObjCProtocolRef = 41, CXCursor_ObjCClassRef = 42, /** * \brief A reference to a type declaration. * * A type reference occurs anywhere where a type is named but not * declared. For example, given: * * \code * typedef unsigned size_type; * size_type size; * \endcode * * The typedef is a declaration of size_type (CXCursor_TypedefDecl), * while the type of the variable "size" is referenced. The cursor * referenced by the type of size is the typedef for size_type. */ CXCursor_TypeRef = 43, CXCursor_LastRef = 43, /* Error conditions */ CXCursor_FirstInvalid = 70, CXCursor_InvalidFile = 70, CXCursor_NoDeclFound = 71, CXCursor_NotImplemented = 72, CXCursor_LastInvalid = 72, /* Expressions */ CXCursor_FirstExpr = 100, /** * \brief An expression whose specific kind is not exposed via this * interface. * * Unexposed expressions have the same operations as any other kind * of expression; one can extract their location information, * spelling, children, etc. However, the specific kind of the * expression is not reported. */ CXCursor_UnexposedExpr = 100, /** * \brief An expression that refers to some value declaration, such * as a function, varible, or enumerator. */ CXCursor_DeclRefExpr = 101, /** * \brief An expression that refers to a member of a struct, union, * class, Objective-C class, etc. */ CXCursor_MemberRefExpr = 102, /** \brief An expression that calls a function. */ CXCursor_CallExpr = 103, /** \brief An expression that sends a message to an Objective-C object or class. */ CXCursor_ObjCMessageExpr = 104, CXCursor_LastExpr = 104, /* Statements */ CXCursor_FirstStmt = 200, /** * \brief A statement whose specific kind is not exposed via this * interface. * * Unexposed statements have the same operations as any other kind of * statement; one can extract their location information, spelling, * children, etc. However, the specific kind of the statement is not * reported. */ CXCursor_UnexposedStmt = 200, CXCursor_LastStmt = 200, /** * \brief Cursor that represents the translation unit itself. * * The translation unit cursor exists primarily to act as the root * cursor for traversing the contents of a translation unit. */ CXCursor_TranslationUnit = 300, /* Attributes */ CXCursor_FirstAttr = 400, /** * \brief An attribute whose specific kind is not exposed via this * interface. */ CXCursor_UnexposedAttr = 400, CXCursor_IBActionAttr = 401, CXCursor_IBOutletAttr = 402, CXCursor_LastAttr = CXCursor_IBOutletAttr }; /** * \brief A cursor representing some element in the abstract syntax tree for * a translation unit. * * The cursor abstraction unifies the different kinds of entities in a * program--declaration, statements, expressions, references to declarations, * etc.--under a single "cursor" abstraction with a common set of operations. * Common operation for a cursor include: getting the physical location in * a source file where the cursor points, getting the name associated with a * cursor, and retrieving cursors for any child nodes of a particular cursor. * * Cursors can be produced in two specific ways. * clang_getTranslationUnitCursor() produces a cursor for a translation unit, * from which one can use clang_visitChildren() to explore the rest of the * translation unit. clang_getCursor() maps from a physical source location * to the entity that resides at that location, allowing one to map from the * source code into the AST. */ typedef struct { enum CXCursorKind kind; void *data[3]; } CXCursor; /** * \defgroup CINDEX_CURSOR_MANIP Cursor manipulations * * @{ */ /** * \brief Retrieve the NULL cursor, which represents no entity. */ CINDEX_LINKAGE CXCursor clang_getNullCursor(void); /** * \brief Retrieve the cursor that represents the given translation unit. * * The translation unit cursor can be used to start traversing the * various declarations within the given translation unit. */ CINDEX_LINKAGE CXCursor clang_getTranslationUnitCursor(CXTranslationUnit); /** * \brief Determine whether two cursors are equivalent. */ CINDEX_LINKAGE unsigned clang_equalCursors(CXCursor, CXCursor); /** * \brief Retrieve the kind of the given cursor. */ CINDEX_LINKAGE enum CXCursorKind clang_getCursorKind(CXCursor); /** * \brief Determine whether the given cursor kind represents a declaration. */ CINDEX_LINKAGE unsigned clang_isDeclaration(enum CXCursorKind); /** * \brief Determine whether the given cursor kind represents a simple * reference. * * Note that other kinds of cursors (such as expressions) can also refer to * other cursors. Use clang_getCursorReferenced() to determine whether a * particular cursor refers to another entity. */ CINDEX_LINKAGE unsigned clang_isReference(enum CXCursorKind); /** * \brief Determine whether the given cursor kind represents an expression. */ CINDEX_LINKAGE unsigned clang_isExpression(enum CXCursorKind); /** * \brief Determine whether the given cursor kind represents a statement. */ CINDEX_LINKAGE unsigned clang_isStatement(enum CXCursorKind); /** * \brief Determine whether the given cursor kind represents an invalid * cursor. */ CINDEX_LINKAGE unsigned clang_isInvalid(enum CXCursorKind); /** * \brief Determine whether the given cursor kind represents a translation * unit. */ CINDEX_LINKAGE unsigned clang_isTranslationUnit(enum CXCursorKind); /** * \brief Describe the linkage of the entity referred to by a cursor. */ enum CXLinkageKind { /** \brief This value indicates that no linkage information is available * for a provided CXCursor. */ CXLinkage_Invalid, /** * \brief This is the linkage for variables, parameters, and so on that * have automatic storage. This covers normal (non-extern) local variables. */ CXLinkage_NoLinkage, /** \brief This is the linkage for static variables and static functions. */ CXLinkage_Internal, /** \brief This is the linkage for entities with external linkage that live * in C++ anonymous namespaces.*/ CXLinkage_UniqueExternal, /** \brief This is the linkage for entities with true, external linkage. */ CXLinkage_External }; /** * \brief Determine the linkage of the entity referred to be a given cursor. */ CINDEX_LINKAGE enum CXLinkageKind clang_getCursorLinkage(CXCursor cursor); /** * @} */ /** * \defgroup CINDEX_CURSOR_SOURCE Mapping between cursors and source code * * Cursors represent a location within the Abstract Syntax Tree (AST). These * routines help map between cursors and the physical locations where the * described entities occur in the source code. The mapping is provided in * both directions, so one can map from source code to the AST and back. * * @{ */ /** * \brief Map a source location to the cursor that describes the entity at that * location in the source code. * * clang_getCursor() maps an arbitrary source location within a translation * unit down to the most specific cursor that describes the entity at that * location. For example, given an expression \c x + y, invoking * clang_getCursor() with a source location pointing to "x" will return the * cursor for "x"; similarly for "y". If the cursor points anywhere between * "x" or "y" (e.g., on the + or the whitespace around it), clang_getCursor() * will return a cursor referring to the "+" expression. * * \returns a cursor representing the entity at the given source location, or * a NULL cursor if no such entity can be found. */ CINDEX_LINKAGE CXCursor clang_getCursor(CXTranslationUnit, CXSourceLocation); /** * \brief Retrieve the physical location of the source constructor referenced * by the given cursor. * * The location of a declaration is typically the location of the name of that * declaration, where the name of that declaration would occur if it is * unnamed, or some keyword that introduces that particular declaration. * The location of a reference is where that reference occurs within the * source code. */ CINDEX_LINKAGE CXSourceLocation clang_getCursorLocation(CXCursor); /** * \brief Retrieve the physical extent of the source construct referenced by * the given cursor. * * The extent of a cursor starts with the file/line/column pointing at the * first character within the source construct that the cursor refers to and * ends with the last character withinin that source construct. For a * declaration, the extent covers the declaration itself. For a reference, * the extent covers the location of the reference (e.g., where the referenced * entity was actually used). */ CINDEX_LINKAGE CXSourceRange clang_getCursorExtent(CXCursor); /** * @} */ /** * \defgroup CINDEX_CURSOR_TRAVERSAL Traversing the AST with cursors * * These routines provide the ability to traverse the abstract syntax tree * using cursors. * * @{ */ /** * \brief Describes how the traversal of the children of a particular * cursor should proceed after visiting a particular child cursor. * * A value of this enumeration type should be returned by each * \c CXCursorVisitor to indicate how clang_visitChildren() proceed. */ enum CXChildVisitResult { /** * \brief Terminates the cursor traversal. */ CXChildVisit_Break, /** * \brief Continues the cursor traversal with the next sibling of * the cursor just visited, without visiting its children. */ CXChildVisit_Continue, /** * \brief Recursively traverse the children of this cursor, using * the same visitor and client data. */ CXChildVisit_Recurse }; /** * \brief Visitor invoked for each cursor found by a traversal. * * This visitor function will be invoked for each cursor found by * clang_visitCursorChildren(). Its first argument is the cursor being * visited, its second argument is the parent visitor for that cursor, * and its third argument is the client data provided to * clang_visitCursorChildren(). * * The visitor should return one of the \c CXChildVisitResult values * to direct clang_visitCursorChildren(). */ typedef enum CXChildVisitResult (*CXCursorVisitor)(CXCursor cursor, CXCursor parent, CXClientData client_data); /** * \brief Visit the children of a particular cursor. * * This function visits all the direct children of the given cursor, * invoking the given \p visitor function with the cursors of each * visited child. The traversal may be recursive, if the visitor returns * \c CXChildVisit_Recurse. The traversal may also be ended prematurely, if * the visitor returns \c CXChildVisit_Break. * * \param parent the cursor whose child may be visited. All kinds of * cursors can be visited, including invalid cursors (which, by * definition, have no children). * * \param visitor the visitor function that will be invoked for each * child of \p parent. * * \param client_data pointer data supplied by the client, which will * be passed to the visitor each time it is invoked. * * \returns a non-zero value if the traversal was terminated * prematurely by the visitor returning \c CXChildVisit_Break. */ CINDEX_LINKAGE unsigned clang_visitChildren(CXCursor parent, CXCursorVisitor visitor, CXClientData client_data); /** * @} */ /** * \defgroup CINDEX_CURSOR_XREF Cross-referencing in the AST * * These routines provide the ability to determine references within and * across translation units, by providing the names of the entities referenced * by cursors, follow reference cursors to the declarations they reference, * and associate declarations with their definitions. * * @{ */ /** * \brief Retrieve a Unified Symbol Resolution (USR) for the entity referenced * by the given cursor. * * A Unified Symbol Resolution (USR) is a string that identifies a particular * entity (function, class, variable, etc.) within a program. USRs can be * compared across translation units to determine, e.g., when references in * one translation refer to an entity defined in another translation unit. */ CINDEX_LINKAGE CXString clang_getCursorUSR(CXCursor); /** * \brief Retrieve a name for the entity referenced by this cursor. */ CINDEX_LINKAGE CXString clang_getCursorSpelling(CXCursor); /** \brief For a cursor that is a reference, retrieve a cursor representing the * entity that it references. * * Reference cursors refer to other entities in the AST. For example, an * Objective-C superclass reference cursor refers to an Objective-C class. * This function produces the cursor for the Objective-C class from the * cursor for the superclass reference. If the input cursor is a declaration or * definition, it returns that declaration or definition unchanged. * Otherwise, returns the NULL cursor. */ CINDEX_LINKAGE CXCursor clang_getCursorReferenced(CXCursor); /** * \brief For a cursor that is either a reference to or a declaration * of some entity, retrieve a cursor that describes the definition of * that entity. * * Some entities can be declared multiple times within a translation * unit, but only one of those declarations can also be a * definition. For example, given: * * \code * int f(int, int); * int g(int x, int y) { return f(x, y); } * int f(int a, int b) { return a + b; } * int f(int, int); * \endcode * * there are three declarations of the function "f", but only the * second one is a definition. The clang_getCursorDefinition() * function will take any cursor pointing to a declaration of "f" * (the first or fourth lines of the example) or a cursor referenced * that uses "f" (the call to "f' inside "g") and will return a * declaration cursor pointing to the definition (the second "f" * declaration). * * If given a cursor for which there is no corresponding definition, * e.g., because there is no definition of that entity within this * translation unit, returns a NULL cursor. */ CINDEX_LINKAGE CXCursor clang_getCursorDefinition(CXCursor); /** * \brief Determine whether the declaration pointed to by this cursor * is also a definition of that entity. */ CINDEX_LINKAGE unsigned clang_isCursorDefinition(CXCursor); /** * @} */ /** * \defgroup CINDEX_LEX Token extraction and manipulation * * The routines in this group provide access to the tokens within a * translation unit, along with a semantic mapping of those tokens to * their corresponding cursors. * * @{ */ /** * \brief Describes a kind of token. */ typedef enum CXTokenKind { /** * \brief A token that contains some kind of punctuation. */ CXToken_Punctuation, /** * \brief A language keyword. */ CXToken_Keyword, /** * \brief An identifier (that is not a keyword). */ CXToken_Identifier, /** * \brief A numeric, string, or character literal. */ CXToken_Literal, /** * \brief A comment. */ CXToken_Comment } CXTokenKind; /** * \brief Describes a single preprocessing token. */ typedef struct { unsigned int_data[4]; void *ptr_data; } CXToken; /** * \brief Determine the kind of the given token. */ CINDEX_LINKAGE CXTokenKind clang_getTokenKind(CXToken); /** * \brief Determine the spelling of the given token. * * The spelling of a token is the textual representation of that token, e.g., * the text of an identifier or keyword. */ CINDEX_LINKAGE CXString clang_getTokenSpelling(CXTranslationUnit, CXToken); /** * \brief Retrieve the source location of the given token. */ CINDEX_LINKAGE CXSourceLocation clang_getTokenLocation(CXTranslationUnit, CXToken); /** * \brief Retrieve a source range that covers the given token. */ CINDEX_LINKAGE CXSourceRange clang_getTokenExtent(CXTranslationUnit, CXToken); /** * \brief Tokenize the source code described by the given range into raw * lexical tokens. * * \param TU the translation unit whose text is being tokenized. * * \param Range the source range in which text should be tokenized. All of the * tokens produced by tokenization will fall within this source range, * * \param Tokens this pointer will be set to point to the array of tokens * that occur within the given source range. The returned pointer must be * freed with clang_disposeTokens() before the translation unit is destroyed. * * \param NumTokens will be set to the number of tokens in the \c *Tokens * array. * */ CINDEX_LINKAGE void clang_tokenize(CXTranslationUnit TU, CXSourceRange Range, CXToken **Tokens, unsigned *NumTokens); /** * \brief Annotate the given set of tokens by providing cursors for each token * that can be mapped to a specific entity within the abstract syntax tree. * * This token-annotation routine is equivalent to invoking * clang_getCursor() for the source locations of each of the * tokens. The cursors provided are filtered, so that only those * cursors that have a direct correspondence to the token are * accepted. For example, given a function call \c f(x), * clang_getCursor() would provide the following cursors: * * * when the cursor is over the 'f', a DeclRefExpr cursor referring to 'f'. * * when the cursor is over the '(' or the ')', a CallExpr referring to 'f'. * * when the cursor is over the 'x', a DeclRefExpr cursor referring to 'x'. * * Only the first and last of these cursors will occur within the * annotate, since the tokens "f" and "x' directly refer to a function * and a variable, respectively, but the parentheses are just a small * part of the full syntax of the function call expression, which is * not provided as an annotation. * * \param TU the translation unit that owns the given tokens. * * \param Tokens the set of tokens to annotate. * * \param NumTokens the number of tokens in \p Tokens. * * \param Cursors an array of \p NumTokens cursors, whose contents will be * replaced with the cursors corresponding to each token. */ CINDEX_LINKAGE void clang_annotateTokens(CXTranslationUnit TU, CXToken *Tokens, unsigned NumTokens, CXCursor *Cursors); /** * \brief Free the given set of tokens. */ CINDEX_LINKAGE void clang_disposeTokens(CXTranslationUnit TU, CXToken *Tokens, unsigned NumTokens); /** * @} */ /** * \defgroup CINDEX_DEBUG Debugging facilities * * These routines are used for testing and debugging, only, and should not * be relied upon. * * @{ */ /* for debug/testing */ CINDEX_LINKAGE CXString clang_getCursorKindSpelling(enum CXCursorKind Kind); CINDEX_LINKAGE void clang_getDefinitionSpellingAndExtent(CXCursor, const char **startBuf, const char **endBuf, unsigned *startLine, unsigned *startColumn, unsigned *endLine, unsigned *endColumn); CINDEX_LINKAGE void clang_enableStackTraces(void); /** * @} */ /** * \defgroup CINDEX_CODE_COMPLET Code completion * * Code completion involves taking an (incomplete) source file, along with * knowledge of where the user is actively editing that file, and suggesting * syntactically- and semantically-valid constructs that the user might want to * use at that particular point in the source code. These data structures and * routines provide support for code completion. * * @{ */ /** * \brief A semantic string that describes a code-completion result. * * A semantic string that describes the formatting of a code-completion * result as a single "template" of text that should be inserted into the * source buffer when a particular code-completion result is selected. * Each semantic string is made up of some number of "chunks", each of which * contains some text along with a description of what that text means, e.g., * the name of the entity being referenced, whether the text chunk is part of * the template, or whether it is a "placeholder" that the user should replace * with actual code,of a specific kind. See \c CXCompletionChunkKind for a * description of the different kinds of chunks. */ typedef void *CXCompletionString; /** * \brief A single result of code completion. */ typedef struct { /** * \brief The kind of entity that this completion refers to. * * The cursor kind will be a macro, keyword, or a declaration (one of the * *Decl cursor kinds), describing the entity that the completion is * referring to. * * \todo In the future, we would like to provide a full cursor, to allow * the client to extract additional information from declaration. */ enum CXCursorKind CursorKind; /** * \brief The code-completion string that describes how to insert this * code-completion result into the editing buffer. */ CXCompletionString CompletionString; } CXCompletionResult; /** * \brief Describes a single piece of text within a code-completion string. * * Each "chunk" within a code-completion string (\c CXCompletionString) is * either a piece of text with a specific "kind" that describes how that text * should be interpreted by the client or is another completion string. */ enum CXCompletionChunkKind { /** * \brief A code-completion string that describes "optional" text that * could be a part of the template (but is not required). * * The Optional chunk is the only kind of chunk that has a code-completion * string for its representation, which is accessible via * \c clang_getCompletionChunkCompletionString(). The code-completion string * describes an additional part of the template that is completely optional. * For example, optional chunks can be used to describe the placeholders for * arguments that match up with defaulted function parameters, e.g. given: * * \code * void f(int x, float y = 3.14, double z = 2.71828); * \endcode * * The code-completion string for this function would contain: * - a TypedText chunk for "f". * - a LeftParen chunk for "(". * - a Placeholder chunk for "int x" * - an Optional chunk containing the remaining defaulted arguments, e.g., * - a Comma chunk for "," * - a Placeholder chunk for "float y" * - an Optional chunk containing the last defaulted argument: * - a Comma chunk for "," * - a Placeholder chunk for "double z" * - a RightParen chunk for ")" * * There are many ways to handle Optional chunks. Two simple approaches are: * - Completely ignore optional chunks, in which case the template for the * function "f" would only include the first parameter ("int x"). * - Fully expand all optional chunks, in which case the template for the * function "f" would have all of the parameters. */ CXCompletionChunk_Optional, /** * \brief Text that a user would be expected to type to get this * code-completion result. * * There will be exactly one "typed text" chunk in a semantic string, which * will typically provide the spelling of a keyword or the name of a * declaration that could be used at the current code point. Clients are * expected to filter the code-completion results based on the text in this * chunk. */ CXCompletionChunk_TypedText, /** * \brief Text that should be inserted as part of a code-completion result. * * A "text" chunk represents text that is part of the template to be * inserted into user code should this particular code-completion result * be selected. */ CXCompletionChunk_Text, /** * \brief Placeholder text that should be replaced by the user. * * A "placeholder" chunk marks a place where the user should insert text * into the code-completion template. For example, placeholders might mark * the function parameters for a function declaration, to indicate that the * user should provide arguments for each of those parameters. The actual * text in a placeholder is a suggestion for the text to display before * the user replaces the placeholder with real code. */ CXCompletionChunk_Placeholder, /** * \brief Informative text that should be displayed but never inserted as * part of the template. * * An "informative" chunk contains annotations that can be displayed to * help the user decide whether a particular code-completion result is the * right option, but which is not part of the actual template to be inserted * by code completion. */ CXCompletionChunk_Informative, /** * \brief Text that describes the current parameter when code-completion is * referring to function call, message send, or template specialization. * * A "current parameter" chunk occurs when code-completion is providing * information about a parameter corresponding to the argument at the * code-completion point. For example, given a function * * \code * int add(int x, int y); * \endcode * * and the source code \c add(, where the code-completion point is after the * "(", the code-completion string will contain a "current parameter" chunk * for "int x", indicating that the current argument will initialize that * parameter. After typing further, to \c add(17, (where the code-completion * point is after the ","), the code-completion string will contain a * "current paremeter" chunk to "int y". */ CXCompletionChunk_CurrentParameter, /** * \brief A left parenthesis ('('), used to initiate a function call or * signal the beginning of a function parameter list. */ CXCompletionChunk_LeftParen, /** * \brief A right parenthesis (')'), used to finish a function call or * signal the end of a function parameter list. */ CXCompletionChunk_RightParen, /** * \brief A left bracket ('['). */ CXCompletionChunk_LeftBracket, /** * \brief A right bracket (']'). */ CXCompletionChunk_RightBracket, /** * \brief A left brace ('{'). */ CXCompletionChunk_LeftBrace, /** * \brief A right brace ('}'). */ CXCompletionChunk_RightBrace, /** * \brief A left angle bracket ('<'). */ CXCompletionChunk_LeftAngle, /** * \brief A right angle bracket ('>'). */ CXCompletionChunk_RightAngle, /** * \brief A comma separator (','). */ CXCompletionChunk_Comma, /** * \brief Text that specifies the result type of a given result. * * This special kind of informative chunk is not meant to be inserted into * the text buffer. Rather, it is meant to illustrate the type that an * expression using the given completion string would have. */ CXCompletionChunk_ResultType, /** * \brief A colon (':'). */ CXCompletionChunk_Colon, /** * \brief A semicolon (';'). */ CXCompletionChunk_SemiColon, /** * \brief An '=' sign. */ CXCompletionChunk_Equal, /** * Horizontal space (' '). */ CXCompletionChunk_HorizontalSpace, /** * Vertical space ('\n'), after which it is generally a good idea to * perform indentation. */ CXCompletionChunk_VerticalSpace }; /** * \brief Determine the kind of a particular chunk within a completion string. * * \param completion_string the completion string to query. * * \param chunk_number the 0-based index of the chunk in the completion string. * * \returns the kind of the chunk at the index \c chunk_number. */ CINDEX_LINKAGE enum CXCompletionChunkKind clang_getCompletionChunkKind(CXCompletionString completion_string, unsigned chunk_number); /** * \brief Retrieve the text associated with a particular chunk within a * completion string. * * \param completion_string the completion string to query. * * \param chunk_number the 0-based index of the chunk in the completion string. * * \returns the text associated with the chunk at index \c chunk_number. */ CINDEX_LINKAGE CXString clang_getCompletionChunkText(CXCompletionString completion_string, unsigned chunk_number); /** * \brief Retrieve the completion string associated with a particular chunk * within a completion string. * * \param completion_string the completion string to query. * * \param chunk_number the 0-based index of the chunk in the completion string. * * \returns the completion string associated with the chunk at index * \c chunk_number, or NULL if that chunk is not represented by a completion * string. */ CINDEX_LINKAGE CXCompletionString clang_getCompletionChunkCompletionString(CXCompletionString completion_string, unsigned chunk_number); /** * \brief Retrieve the number of chunks in the given code-completion string. */ CINDEX_LINKAGE unsigned clang_getNumCompletionChunks(CXCompletionString completion_string); /** * \brief Contains the results of code-completion. * * This data structure contains the results of code completion, as * produced by \c clang_codeComplete. Its contents must be freed by * \c clang_disposeCodeCompleteResults. */ typedef struct { /** * \brief The code-completion results. */ CXCompletionResult *Results; /** * \brief The number of code-completion results stored in the * \c Results array. */ unsigned NumResults; } CXCodeCompleteResults; /** * \brief Perform code completion at a given location in a source file. * * This function performs code completion at a particular file, line, and * column within source code, providing results that suggest potential * code snippets based on the context of the completion. The basic model * for code completion is that Clang will parse a complete source file, * performing syntax checking up to the location where code-completion has * been requested. At that point, a special code-completion token is passed * to the parser, which recognizes this token and determines, based on the * current location in the C/Objective-C/C++ grammar and the state of * semantic analysis, what completions to provide. These completions are * returned via a new \c CXCodeCompleteResults structure. * * Code completion itself is meant to be triggered by the client when the * user types punctuation characters or whitespace, at which point the * code-completion location will coincide with the cursor. For example, if \c p * is a pointer, code-completion might be triggered after the "-" and then * after the ">" in \c p->. When the code-completion location is afer the ">", * the completion results will provide, e.g., the members of the struct that * "p" points to. The client is responsible for placing the cursor at the * beginning of the token currently being typed, then filtering the results * based on the contents of the token. For example, when code-completing for * the expression \c p->get, the client should provide the location just after * the ">" (e.g., pointing at the "g") to this code-completion hook. Then, the * client can filter the results based on the current token text ("get"), only * showing those results that start with "get". The intent of this interface * is to separate the relatively high-latency acquisition of code-completion * results from the filtering of results on a per-character basis, which must * have a lower latency. * * \param CIdx the \c CXIndex instance that will be used to perform code * completion. * * \param source_filename the name of the source file that should be parsed to * perform code-completion. This source file must be the same as or include the * filename described by \p complete_filename, or no code-completion results * will be produced. NOTE: One can also specify NULL for this argument if the * source file is included in command_line_args. * * \param num_command_line_args the number of command-line arguments stored in * \p command_line_args. * * \param command_line_args the command-line arguments to pass to the Clang * compiler to build the given source file. This should include all of the * necessary include paths, language-dialect switches, precompiled header * includes, etc., but should not include any information specific to * code completion. * * \param num_unsaved_files the number of unsaved file entries in \p * unsaved_files. * * \param unsaved_files the files that have not yet been saved to disk * but may be required for code completion, including the contents of * those files. * * \param complete_filename the name of the source file where code completion * should be performed. In many cases, this name will be the same as the * source filename. However, the completion filename may also be a file * included by the source file, which is required when producing * code-completion results for a header. * * \param complete_line the line at which code-completion should occur. * * \param complete_column the column at which code-completion should occur. * Note that the column should point just after the syntactic construct that * initiated code completion, and not in the middle of a lexical token. * * \param diag_callback callback function that will receive any diagnostics * emitted while processing this source file. If NULL, diagnostics will be * suppressed. * * \param diag_client_data client data that will be passed to the diagnostic * callback function. * * \returns if successful, a new CXCodeCompleteResults structure * containing code-completion results, which should eventually be * freed with \c clang_disposeCodeCompleteResults(). If code * completion fails, returns NULL. */ CINDEX_LINKAGE CXCodeCompleteResults *clang_codeComplete(CXIndex CIdx, const char *source_filename, int num_command_line_args, const char **command_line_args, unsigned num_unsaved_files, struct CXUnsavedFile *unsaved_files, const char *complete_filename, unsigned complete_line, unsigned complete_column); /** * \brief Free the given set of code-completion results. */ CINDEX_LINKAGE void clang_disposeCodeCompleteResults(CXCodeCompleteResults *Results); /** * \brief Determine the number of diagnostics produced prior to the * location where code completion was performed. */ CINDEX_LINKAGE unsigned clang_codeCompleteGetNumDiagnostics(CXCodeCompleteResults *Results); /** * \brief Retrieve a diagnostic associated with the given code completion. * * \param Result the code completion results to query. * \param Index the zero-based diagnostic number to retrieve. * * \returns the requested diagnostic. This diagnostic must be freed * via a call to \c clang_disposeDiagnostic(). */ CINDEX_LINKAGE CXDiagnostic clang_codeCompleteGetDiagnostic(CXCodeCompleteResults *Results, unsigned Index); /** * @} */ /** * \defgroup CINDEX_MISC Miscellaneous utility functions * * @{ */ /** * \brief Return a version string, suitable for showing to a user, but not * intended to be parsed (the format is not guaranteed to be stable). */ CINDEX_LINKAGE CXString clang_getClangVersion(); /** * \brief Return a version string, suitable for showing to a user, but not * intended to be parsed (the format is not guaranteed to be stable). */ /** * \brief Visitor invoked for each file in a translation unit * (used with clang_getInclusions()). * * This visitor function will be invoked by clang_getInclusions() for each * file included (either at the top-level or by #include directives) within * a translation unit. The first argument is the file being included, and * the second and third arguments provide the inclusion stack. The * array is sorted in order of immediate inclusion. For example, * the first element refers to the location that included 'included_file'. */ typedef void (*CXInclusionVisitor)(CXFile included_file, CXSourceLocation* inclusion_stack, unsigned include_len, CXClientData client_data); /** * \brief Visit the set of preprocessor inclusions in a translation unit. * The visitor function is called with the provided data for every included * file. This does not include headers included by the PCH file (unless one * is inspecting the inclusions in the PCH file itself). */ CINDEX_LINKAGE void clang_getInclusions(CXTranslationUnit tu, CXInclusionVisitor visitor, CXClientData client_data); /** * @} */ /** * @} */ #ifdef __cplusplus } #endif #endif