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llvm-project/clang/include/clang-c/Index.h

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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 <sys/stat.h>
#include <time.h>
#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 null-terminated buffer containing the unsaved contents
* of this file.
*/
const char *Contents;
/**
* \brief The length of the unsaved contents of this buffer, not
* counting the NULL at the end of the 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
* Idx = clang_createIndex(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);
/**
* \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 Describes the kind of fix-it hint expressed within a
* diagnostic.
*/
enum CXFixItKind {
/**
* \brief A fix-it hint that inserts code at a particular position.
*/
CXFixIt_Insertion = 0,
/**
* \brief A fix-it hint that removes code within a range.
*/
CXFixIt_Removal = 1,
/**
* \brief A fix-it hint that replaces the code within a range with another
* string.
*/
CXFixIt_Replacement = 2
};
/**
* \brief A single diagnostic, containing the diagnostic's severity,
* location, text, source ranges, and fix-it hints.
*/
typedef void *CXDiagnostic;
/**
* \brief Callback function invoked for each diagnostic emitted during
* translation.
*
* \param Diagnostic the diagnostic emitted during translation. This
* diagnostic pointer is only valid during the execution of the
* callback.
*
* \param ClientData the callback client data.
*/
typedef void (*CXDiagnosticCallback)(CXDiagnostic Diagnostic,
CXClientData ClientData);
/**
* \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 kind of the given fix-it.
*
* \param Diagnostic the diagnostic whose fix-its are being queried.
*
* \param FixIt the zero-based index of the fix-it to query.
*/
CINDEX_LINKAGE enum CXFixItKind
clang_getDiagnosticFixItKind(CXDiagnostic Diagnostic, unsigned FixIt);
/**
* \brief Retrieve the insertion information for an insertion fix-it.
*
* For a fix-it that describes an insertion into a text buffer,
* retrieve the source location where the text should be inserted and
* the text to be inserted.
*
* \param Diagnostic the diagnostic whose fix-its are being queried.
*
* \param FixIt the zero-based index of the insertion fix-it.
*
* \param Location will be set to the location where text should be
* inserted.
*
* \returns the text string to insert at the given location.
*/
CINDEX_LINKAGE CXString
clang_getDiagnosticFixItInsertion(CXDiagnostic Diagnostic, unsigned FixIt,
CXSourceLocation *Location);
/**
* \brief Retrieve the removal information for a removal fix-it.
*
* For a fix-it that describes a removal from a text buffer, retrieve
* the source range that should be removed.
*
* \param Diagnostic the diagnostic whose fix-its are being queried.
*
* \param FixIt the zero-based index of the removal fix-it.
*
* \returns a source range describing the text that should be removed
* from the buffer.
*/
CINDEX_LINKAGE CXSourceRange
clang_getDiagnosticFixItRemoval(CXDiagnostic Diagnostic, unsigned FixIt);
/**
* \brief Retrieve the replacement information for an replacement fix-it.
*
* For a fix-it that describes replacement of text in the text buffer
* with alternative text.
*
* \param Diagnostic the diagnostic whose fix-its are being queried.
*
* \param FixIt the zero-based index of the replacement fix-it.
*
* \param Range will be set to the source range whose text should be
* replaced with the returned text.
*
* \returns the text string to use as replacement text.
*/
CINDEX_LINKAGE CXString
clang_getDiagnosticFixItReplacement(CXDiagnostic Diagnostic, unsigned FixIt,
CXSourceRange *Range);
/**
* @}
*/
/**
* \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 <output file>' (both '-o' and '<output file>' 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,
CXDiagnosticCallback diag_callback,
CXClientData diag_client_data);
/**
* \brief Create a translation unit from an AST file (-emit-ast).
*/
CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnit(CXIndex,
const char *ast_filename,
CXDiagnosticCallback diag_callback,
CXClientData diag_client_data);
/**
* \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
};
/**
* \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);
/**
* @}
*/
/**
* \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 const char *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);
/**
* @}
*/
/**
* \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 x"
* - 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 two 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 const char *
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,
CXDiagnosticCallback diag_callback,
CXClientData diag_client_data);
/**
* \brief Free the given set of code-completion results.
*/
CINDEX_LINKAGE
void clang_disposeCodeCompleteResults(CXCodeCompleteResults *Results);
/**
* @}
*/
/**
* \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
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