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#===- - Python Indexing Library Bindings -----------*- python -*--===#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Clang Indexing Library Bindings
This module provides an interface to the Clang indexing library. It is a
low-level interface to the indexing library which attempts to match the Clang
API directly while also being "pythonic". Notable differences from the C API
* string results are returned as Python strings, not CXString objects.
* null cursors are translated to None.
* access to child cursors is done via iteration, not visitation.
The major indexing objects are:
The top-level object which manages some global library state.
High-level object encapsulating the AST for a single translation unit. These
can be loaded from .ast files or parsed on the fly.
Generic object for representing a node in the AST.
SourceRange, SourceLocation, and File
Objects representing information about the input source.
Most object information is exposed using properties, when the underlying API
call is efficient.
from __future__ import absolute_import, division, print_function
# ====
# o API support for invalid translation units. Currently we can't even get the
# diagnostics on failure because they refer to locations in an object that
# will have been invalidated.
# o fix memory management issues (currently client must hold on to index and
# translation unit, or risk crashes).
# o expose code completion APIs.
# o cleanup ctypes wrapping, would be nice to separate the ctypes details more
# clearly, and hide from the external interface (i.e., help(cindex)).
# o implement additional SourceLocation, SourceRange, and File methods.
from ctypes import *
import clang.enumerations
import os
import sys
if sys.version_info[0] == 3:
# Python 3 strings are unicode, translate them to/from utf8 for C-interop.
class c_interop_string(c_char_p):
def __init__(self, p=None):
if p is None:
p = ""
if isinstance(p, str):
p = p.encode("utf8")
super(c_char_p, self).__init__(p)
def __str__(self):
return self.value
def value(self):
if super(c_char_p, self).value is None:
return None
return super(c_char_p, self).value.decode("utf8")
def from_param(cls, param):
if isinstance(param, str):
return cls(param)
if isinstance(param, bytes):
return cls(param)
if param is None:
# Support passing null to C functions expecting char arrays
return None
raise TypeError("Cannot convert '{}' to '{}'".format(type(param).__name__, cls.__name__))
def to_python_string(x, *args):
return x.value
def b(x):
if isinstance(x, bytes):
return x
return x.encode('utf8')
elif sys.version_info[0] == 2:
# Python 2 strings are utf8 byte strings, no translation is needed for
# C-interop.
c_interop_string = c_char_p
def _to_python_string(x, *args):
return x
c_interop_string.to_python_string = staticmethod(_to_python_string)
def b(x):
return x
# Importing ABC-s directly from collections is deprecated since Python 3.7,
# will stop working in Python 3.8.
# See:
if sys.version_info[:2] >= (3, 7):
from collections import abc as collections_abc
import collections as collections_abc
# We only support PathLike objects on Python version with os.fspath present
# to be consistent with the Python standard library. On older Python versions
# we only support strings and we have dummy fspath to just pass them through.
fspath = os.fspath
except AttributeError:
def fspath(x):
return x
# ctypes doesn't implicitly convert c_void_p to the appropriate wrapper
# object. This is a problem, because it means that from_parameter will see an
# integer and pass the wrong value on platforms where int != void*. Work around
# this by marshalling object arguments as void**.
c_object_p = POINTER(c_void_p)
callbacks = {}
### Exception Classes ###
class TranslationUnitLoadError(Exception):
"""Represents an error that occurred when loading a TranslationUnit.
This is raised in the case where a TranslationUnit could not be
instantiated due to failure in the libclang library.
FIXME: Make libclang expose additional error information in this scenario.
class TranslationUnitSaveError(Exception):
"""Represents an error that occurred when saving a TranslationUnit.
Each error has associated with it an enumerated value, accessible under
e.save_error. Consumers can compare the value with one of the ERROR_
constants in this class.
# Indicates that an unknown error occurred. This typically indicates that
# I/O failed during save.
# Indicates that errors during translation prevented saving. The errors
# should be available via the TranslationUnit's diagnostics.
# Indicates that the translation unit was somehow invalid.
def __init__(self, enumeration, message):
assert isinstance(enumeration, int)
if enumeration < 1 or enumeration > 3:
raise Exception("Encountered undefined TranslationUnit save error "
"constant: %d. Please file a bug to have this "
"value supported." % enumeration)
self.save_error = enumeration
Exception.__init__(self, 'Error %d: %s' % (enumeration, message))
### Structures and Utility Classes ###
class CachedProperty(object):
"""Decorator that lazy-loads the value of a property.
The first time the property is accessed, the original property function is
executed. The value it returns is set as the new value of that instance's
property, replacing the original method.
def __init__(self, wrapped):
self.wrapped = wrapped
self.__doc__ = wrapped.__doc__
def __get__(self, instance, instance_type=None):
if instance is None:
return self
value = self.wrapped(instance)
setattr(instance, self.wrapped.__name__, value)
return value
class _CXString(Structure):
"""Helper for transforming CXString results."""
_fields_ = [("spelling", c_char_p), ("free", c_int)]
def __del__(self):
def from_result(res, fn=None, args=None):
assert isinstance(res, _CXString)
return conf.lib.clang_getCString(res)
class SourceLocation(Structure):
A SourceLocation represents a particular location within a source file.
_fields_ = [("ptr_data", c_void_p * 2), ("int_data", c_uint)]
_data = None
def _get_instantiation(self):
if self._data is None:
f, l, c, o = c_object_p(), c_uint(), c_uint(), c_uint()
conf.lib.clang_getInstantiationLocation(self, byref(f), byref(l),
byref(c), byref(o))
if f:
f = File(f)
f = None
self._data = (f, int(l.value), int(c.value), int(o.value))
return self._data
def from_position(tu, file, line, column):
Retrieve the source location associated with a given file/line/column in
a particular translation unit.
return conf.lib.clang_getLocation(tu, file, line, column)
def from_offset(tu, file, offset):
"""Retrieve a SourceLocation from a given character offset.
tu -- TranslationUnit file belongs to
file -- File instance to obtain offset from
offset -- Integer character offset within file
return conf.lib.clang_getLocationForOffset(tu, file, offset)
def file(self):
"""Get the file represented by this source location."""
return self._get_instantiation()[0]
def line(self):
"""Get the line represented by this source location."""
return self._get_instantiation()[1]
def column(self):
"""Get the column represented by this source location."""
return self._get_instantiation()[2]
def offset(self):
"""Get the file offset represented by this source location."""
return self._get_instantiation()[3]
def __eq__(self, other):
return conf.lib.clang_equalLocations(self, other)
def __ne__(self, other):
return not self.__eq__(other)
def __repr__(self):
if self.file:
filename =
filename = None
return "<SourceLocation file %r, line %r, column %r>" % (
filename, self.line, self.column)
class SourceRange(Structure):
A SourceRange describes a range of source locations within the source
_fields_ = [
("ptr_data", c_void_p * 2),
("begin_int_data", c_uint),
("end_int_data", c_uint)]
# FIXME: Eliminate this and make normal constructor? Requires hiding ctypes
# object.
def from_locations(start, end):
return conf.lib.clang_getRange(start, end)
def start(self):
Return a SourceLocation representing the first character within a
source range.
return conf.lib.clang_getRangeStart(self)
def end(self):
Return a SourceLocation representing the last character within a
source range.
return conf.lib.clang_getRangeEnd(self)
def __eq__(self, other):
return conf.lib.clang_equalRanges(self, other)
def __ne__(self, other):
return not self.__eq__(other)
def __contains__(self, other):
"""Useful to detect the Token/Lexer bug"""
if not isinstance(other, SourceLocation):
return False
if other.file is None and self.start.file is None:
elif ( != or !=
# same file name
return False
# same file, in between lines
if self.start.line < other.line < self.end.line:
return True
elif self.start.line == other.line:
# same file first line
if self.start.column <= other.column:
return True
elif other.line == self.end.line:
# same file last line
if other.column <= self.end.column:
return True
return False
def __repr__(self):
return "<SourceRange start %r, end %r>" % (self.start, self.end)
class Diagnostic(object):
A Diagnostic is a single instance of a Clang diagnostic. It includes the
diagnostic severity, the message, the location the diagnostic occurred, as
well as additional source ranges and associated fix-it hints.
Ignored = 0
Note = 1
Warning = 2
Error = 3
Fatal = 4
DisplaySourceLocation = 0x01
DisplayColumn = 0x02
DisplaySourceRanges = 0x04
DisplayOption = 0x08
DisplayCategoryId = 0x10
DisplayCategoryName = 0x20
_FormatOptionsMask = 0x3f
def __init__(self, ptr):
self.ptr = ptr
def __del__(self):
def severity(self):
return conf.lib.clang_getDiagnosticSeverity(self)
def location(self):
return conf.lib.clang_getDiagnosticLocation(self)
def spelling(self):
return conf.lib.clang_getDiagnosticSpelling(self)
def ranges(self):
class RangeIterator(object):
def __init__(self, diag):
self.diag = diag
def __len__(self):
return int(conf.lib.clang_getDiagnosticNumRanges(self.diag))
def __getitem__(self, key):
if (key >= len(self)):
raise IndexError
return conf.lib.clang_getDiagnosticRange(self.diag, key)
return RangeIterator(self)
def fixits(self):
class FixItIterator(object):
def __init__(self, diag):
self.diag = diag
def __len__(self):
return int(conf.lib.clang_getDiagnosticNumFixIts(self.diag))
def __getitem__(self, key):
range = SourceRange()
value = conf.lib.clang_getDiagnosticFixIt(self.diag, key,
if len(value) == 0:
raise IndexError
return FixIt(range, value)
return FixItIterator(self)
def children(self):
class ChildDiagnosticsIterator(object):
def __init__(self, diag):
self.diag_set = conf.lib.clang_getChildDiagnostics(diag)
def __len__(self):
return int(conf.lib.clang_getNumDiagnosticsInSet(self.diag_set))
def __getitem__(self, key):
diag = conf.lib.clang_getDiagnosticInSet(self.diag_set, key)
if not diag:
raise IndexError
return Diagnostic(diag)
return ChildDiagnosticsIterator(self)
def category_number(self):
"""The category number for this diagnostic or 0 if unavailable."""
return conf.lib.clang_getDiagnosticCategory(self)
def category_name(self):
"""The string name of the category for this diagnostic."""
return conf.lib.clang_getDiagnosticCategoryText(self)
def option(self):
"""The command-line option that enables this diagnostic."""
return conf.lib.clang_getDiagnosticOption(self, None)
def disable_option(self):
"""The command-line option that disables this diagnostic."""
disable = _CXString()
conf.lib.clang_getDiagnosticOption(self, byref(disable))
return _CXString.from_result(disable)
def format(self, options=None):
Format this diagnostic for display. The options argument takes
Diagnostic.Display* flags, which can be combined using bitwise OR. If
the options argument is not provided, the default display options will
be used.
if options is None:
options = conf.lib.clang_defaultDiagnosticDisplayOptions()
if options & ~Diagnostic._FormatOptionsMask:
raise ValueError('Invalid format options')
return conf.lib.clang_formatDiagnostic(self, options)
def __repr__(self):
return "<Diagnostic severity %r, location %r, spelling %r>" % (
self.severity, self.location, self.spelling)
def __str__(self):
return self.format()
def from_param(self):
return self.ptr
class FixIt(object):
A FixIt represents a transformation to be applied to the source to
"fix-it". The fix-it shouldbe applied by replacing the given source range
with the given value.
def __init__(self, range, value):
self.range = range
self.value = value
def __repr__(self):
return "<FixIt range %r, value %r>" % (self.range, self.value)
class TokenGroup(object):
"""Helper class to facilitate token management.
Tokens are allocated from libclang in chunks. They must be disposed of as a
collective group.
One purpose of this class is for instances to represent groups of allocated
tokens. Each token in a group contains a reference back to an instance of
this class. When all tokens from a group are garbage collected, it allows
this class to be garbage collected. When this class is garbage collected,
it calls the libclang destructor which invalidates all tokens in the group.
You should not instantiate this class outside of this module.
def __init__(self, tu, memory, count):
self._tu = tu
self._memory = memory
self._count = count
def __del__(self):
conf.lib.clang_disposeTokens(self._tu, self._memory, self._count)
def get_tokens(tu, extent):
"""Helper method to return all tokens in an extent.
This functionality is needed multiple places in this module. We define
it here because it seems like a logical place.
tokens_memory = POINTER(Token)()
tokens_count = c_uint()
conf.lib.clang_tokenize(tu, extent, byref(tokens_memory),
count = int(tokens_count.value)
# If we get no tokens, no memory was allocated. Be sure not to return
# anything and potentially call a destructor on nothing.
if count < 1:
tokens_array = cast(tokens_memory, POINTER(Token * count)).contents
token_group = TokenGroup(tu, tokens_memory, tokens_count)
for i in range(0, count):
token = Token()
token.int_data = tokens_array[i].int_data
token.ptr_data = tokens_array[i].ptr_data
token._tu = tu
token._group = token_group
yield token
class TokenKind(object):
"""Describes a specific type of a Token."""
_value_map = {} # int -> TokenKind
def __init__(self, value, name):
"""Create a new TokenKind instance from a numeric value and a name."""
self.value = value = name
def __repr__(self):
return 'TokenKind.%s' % (,)
def from_value(value):
"""Obtain a registered TokenKind instance from its value."""
result = TokenKind._value_map.get(value, None)
if result is None:
raise ValueError('Unknown TokenKind: %d' % value)
return result
def register(value, name):
"""Register a new TokenKind enumeration.
This should only be called at module load time by code within this
if value in TokenKind._value_map:
raise ValueError('TokenKind already registered: %d' % value)
kind = TokenKind(value, name)
TokenKind._value_map[value] = kind
setattr(TokenKind, name, kind)
### Cursor Kinds ###
class BaseEnumeration(object):
Common base class for named enumerations held in sync with Index.h values.
Subclasses must define their own _kinds and _name_map members, as:
_kinds = []
_name_map = None
These values hold the per-subclass instances and value-to-name mappings,
def __init__(self, value):
if value >= len(self.__class__._kinds):
self.__class__._kinds += [None] * (value - len(self.__class__._kinds) + 1)
if self.__class__._kinds[value] is not None:
raise ValueError('{0} value {1} already loaded'.format(
str(self.__class__), value))
self.value = value
self.__class__._kinds[value] = self
self.__class__._name_map = None
def from_param(self):
return self.value
def name(self):
"""Get the enumeration name of this cursor kind."""
if self._name_map is None:
self._name_map = {}
for key, value in self.__class__.__dict__.items():
if isinstance(value, self.__class__):
self._name_map[value] = key
return self._name_map[self]
def from_id(cls, id):
if id >= len(cls._kinds) or cls._kinds[id] is None:
raise ValueError('Unknown template argument kind %d' % id)
return cls._kinds[id]
def __repr__(self):
return '%s.%s' % (self.__class__,,)
class CursorKind(BaseEnumeration):
A CursorKind describes the kind of entity that a cursor points to.
# The required BaseEnumeration declarations.
_kinds = []
_name_map = None
def get_all_kinds():
"""Return all CursorKind enumeration instances."""
return [x for x in CursorKind._kinds if not x is None]
def is_declaration(self):
"""Test if this is a declaration kind."""
return conf.lib.clang_isDeclaration(self)
def is_reference(self):
"""Test if this is a reference kind."""
return conf.lib.clang_isReference(self)
def is_expression(self):
"""Test if this is an expression kind."""
return conf.lib.clang_isExpression(self)
def is_statement(self):
"""Test if this is a statement kind."""
return conf.lib.clang_isStatement(self)
def is_attribute(self):
"""Test if this is an attribute kind."""
return conf.lib.clang_isAttribute(self)
def is_invalid(self):
"""Test if this is an invalid kind."""
return conf.lib.clang_isInvalid(self)
def is_translation_unit(self):
"""Test if this is a translation unit kind."""
return conf.lib.clang_isTranslationUnit(self)
def is_preprocessing(self):
"""Test if this is a preprocessing kind."""
return conf.lib.clang_isPreprocessing(self)
def is_unexposed(self):
"""Test if this is an unexposed kind."""
return conf.lib.clang_isUnexposed(self)
def __repr__(self):
return 'CursorKind.%s' % (,)
# Declaration Kinds
# 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.
CursorKind.UNEXPOSED_DECL = CursorKind(1)
# A C or C++ struct.
CursorKind.STRUCT_DECL = CursorKind(2)
# A C or C++ union.
CursorKind.UNION_DECL = CursorKind(3)
# A C++ class.
CursorKind.CLASS_DECL = CursorKind(4)
# An enumeration.
CursorKind.ENUM_DECL = CursorKind(5)
# A field (in C) or non-static data member (in C++) in a struct, union, or C++
# class.
CursorKind.FIELD_DECL = CursorKind(6)
# An enumerator constant.
CursorKind.ENUM_CONSTANT_DECL = CursorKind(7)
# A function.
CursorKind.FUNCTION_DECL = CursorKind(8)
# A variable.
CursorKind.VAR_DECL = CursorKind(9)
# A function or method parameter.
CursorKind.PARM_DECL = CursorKind(10)
# An Objective-C @interface.
CursorKind.OBJC_INTERFACE_DECL = CursorKind(11)
# An Objective-C @interface for a category.
CursorKind.OBJC_CATEGORY_DECL = CursorKind(12)
# An Objective-C @protocol declaration.
CursorKind.OBJC_PROTOCOL_DECL = CursorKind(13)
# An Objective-C @property declaration.
CursorKind.OBJC_PROPERTY_DECL = CursorKind(14)
# An Objective-C instance variable.
CursorKind.OBJC_IVAR_DECL = CursorKind(15)
# An Objective-C instance method.
CursorKind.OBJC_INSTANCE_METHOD_DECL = CursorKind(16)
# An Objective-C class method.
CursorKind.OBJC_CLASS_METHOD_DECL = CursorKind(17)
# An Objective-C @implementation.
CursorKind.OBJC_IMPLEMENTATION_DECL = CursorKind(18)
# An Objective-C @implementation for a category.
CursorKind.OBJC_CATEGORY_IMPL_DECL = CursorKind(19)
# A typedef.
CursorKind.TYPEDEF_DECL = CursorKind(20)
# A C++ class method.
CursorKind.CXX_METHOD = CursorKind(21)
# A C++ namespace.
CursorKind.NAMESPACE = CursorKind(22)
# A linkage specification, e.g. 'extern "C"'.
CursorKind.LINKAGE_SPEC = CursorKind(23)
# A C++ constructor.
CursorKind.CONSTRUCTOR = CursorKind(24)
# A C++ destructor.
CursorKind.DESTRUCTOR = CursorKind(25)
# A C++ conversion function.
CursorKind.CONVERSION_FUNCTION = CursorKind(26)
# A C++ template type parameter
CursorKind.TEMPLATE_TYPE_PARAMETER = CursorKind(27)
# A C++ non-type template parameter.
# A C++ template template parameter.
# A C++ function template.
CursorKind.FUNCTION_TEMPLATE = CursorKind(30)
# A C++ class template.
CursorKind.CLASS_TEMPLATE = CursorKind(31)
# A C++ class template partial specialization.
# A C++ namespace alias declaration.
CursorKind.NAMESPACE_ALIAS = CursorKind(33)
# A C++ using directive
CursorKind.USING_DIRECTIVE = CursorKind(34)
# A C++ using declaration
CursorKind.USING_DECLARATION = CursorKind(35)
# A Type alias decl.
CursorKind.TYPE_ALIAS_DECL = CursorKind(36)
# A Objective-C synthesize decl
CursorKind.OBJC_SYNTHESIZE_DECL = CursorKind(37)
# A Objective-C dynamic decl
CursorKind.OBJC_DYNAMIC_DECL = CursorKind(38)
# A C++ access specifier decl.
CursorKind.CXX_ACCESS_SPEC_DECL = CursorKind(39)
# Reference Kinds
CursorKind.OBJC_SUPER_CLASS_REF = CursorKind(40)
CursorKind.OBJC_PROTOCOL_REF = CursorKind(41)
CursorKind.OBJC_CLASS_REF = CursorKind(42)
# A reference to a type declaration.
# A type reference occurs anywhere where a type is named but not
# declared. For example, given:
# typedef unsigned size_type;
# size_type size;
# 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.
CursorKind.TYPE_REF = CursorKind(43)
CursorKind.CXX_BASE_SPECIFIER = CursorKind(44)
# A reference to a class template, function template, template
# template parameter, or class template partial specialization.
CursorKind.TEMPLATE_REF = CursorKind(45)
# A reference to a namespace or namepsace alias.
CursorKind.NAMESPACE_REF = CursorKind(46)
# A reference to a member of a struct, union, or class that occurs in
# some non-expression context, e.g., a designated initializer.
CursorKind.MEMBER_REF = CursorKind(47)
# A reference to a labeled statement.
CursorKind.LABEL_REF = CursorKind(48)
# A reference to a set of overloaded functions or function templates
# that has not yet been resolved to a specific function or function template.
CursorKind.OVERLOADED_DECL_REF = CursorKind(49)
# A reference to a variable that occurs in some non-expression
# context, e.g., a C++ lambda capture list.
CursorKind.VARIABLE_REF = CursorKind(50)
# Invalid/Error Kinds
CursorKind.INVALID_FILE = CursorKind(70)
CursorKind.NO_DECL_FOUND = CursorKind(71)
CursorKind.NOT_IMPLEMENTED = CursorKind(72)
CursorKind.INVALID_CODE = CursorKind(73)
# Expression Kinds
# 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.
CursorKind.UNEXPOSED_EXPR = CursorKind(100)
# An expression that refers to some value declaration, such as a function,
# variable, or enumerator.
CursorKind.DECL_REF_EXPR = CursorKind(101)
# An expression that refers to a member of a struct, union, class, Objective-C
# class, etc.
CursorKind.MEMBER_REF_EXPR = CursorKind(102)
# An expression that calls a function.
CursorKind.CALL_EXPR = CursorKind(103)
# An expression that sends a message to an Objective-C object or class.
CursorKind.OBJC_MESSAGE_EXPR = CursorKind(104)
# An expression that represents a block literal.
CursorKind.BLOCK_EXPR = CursorKind(105)
# An integer literal.
CursorKind.INTEGER_LITERAL = CursorKind(106)
# A floating point number literal.
CursorKind.FLOATING_LITERAL = CursorKind(107)
# An imaginary number literal.
CursorKind.IMAGINARY_LITERAL = CursorKind(108)
# A string literal.
CursorKind.STRING_LITERAL = CursorKind(109)
# A character literal.
CursorKind.CHARACTER_LITERAL = CursorKind(110)
# A parenthesized expression, e.g. "(1)".
# This AST node is only formed if full location information is requested.
CursorKind.PAREN_EXPR = CursorKind(111)
# This represents the unary-expression's (except sizeof and
# alignof).
CursorKind.UNARY_OPERATOR = CursorKind(112)
# [C99] Array Subscripting.
CursorKind.ARRAY_SUBSCRIPT_EXPR = CursorKind(113)
# A builtin binary operation expression such as "x + y" or
# "x <= y".
CursorKind.BINARY_OPERATOR = CursorKind(114)
# Compound assignment such as "+=".
# The ?: ternary operator.
CursorKind.CONDITIONAL_OPERATOR = CursorKind(116)
# An explicit cast in C (C99 6.5.4) or a C-style cast in C++
# (C++ [expr.cast]), which uses the syntax (Type)expr.
# For example: (int)f.
CursorKind.CSTYLE_CAST_EXPR = CursorKind(117)
# [C99]
CursorKind.COMPOUND_LITERAL_EXPR = CursorKind(118)
# Describes an C or C++ initializer list.
CursorKind.INIT_LIST_EXPR = CursorKind(119)
# The GNU address of label extension, representing &&label.
CursorKind.ADDR_LABEL_EXPR = CursorKind(120)
# This is the GNU Statement Expression extension: ({int X=4; X;})
CursorKind.StmtExpr = CursorKind(121)
# Represents a C11 generic selection.
CursorKind.GENERIC_SELECTION_EXPR = CursorKind(122)
# Implements the GNU __null extension, which is a name for a null
# pointer constant that has integral type (e.g., int or long) and is the same
# size and alignment as a pointer.
# The __null extension is typically only used by system headers, which define
# NULL as __null in C++ rather than using 0 (which is an integer that may not
# match the size of a pointer).
CursorKind.GNU_NULL_EXPR = CursorKind(123)
# C++'s static_cast<> expression.
CursorKind.CXX_STATIC_CAST_EXPR = CursorKind(124)
# C++'s dynamic_cast<> expression.
CursorKind.CXX_DYNAMIC_CAST_EXPR = CursorKind(125)
# C++'s reinterpret_cast<> expression.
CursorKind.CXX_REINTERPRET_CAST_EXPR = CursorKind(126)
# C++'s const_cast<> expression.
CursorKind.CXX_CONST_CAST_EXPR = CursorKind(127)
# Represents an explicit C++ type conversion that uses "functional"
# notion (C++ [expr.type.conv]).
# Example:
# \code
# x = int(0.5);
# \endcode
CursorKind.CXX_FUNCTIONAL_CAST_EXPR = CursorKind(128)
# A C++ typeid expression (C++ [expr.typeid]).
CursorKind.CXX_TYPEID_EXPR = CursorKind(129)
# [C++ 2.13.5] C++ Boolean Literal.
CursorKind.CXX_BOOL_LITERAL_EXPR = CursorKind(130)
# [C++0x 2.14.7] C++ Pointer Literal.
CursorKind.CXX_NULL_PTR_LITERAL_EXPR = CursorKind(131)
# Represents the "this" expression in C++
CursorKind.CXX_THIS_EXPR = CursorKind(132)
# [C++ 15] C++ Throw Expression.
# This handles 'throw' and 'throw' assignment-expression. When
# assignment-expression isn't present, Op will be null.
CursorKind.CXX_THROW_EXPR = CursorKind(133)
# A new expression for memory allocation and constructor calls, e.g:
# "new CXXNewExpr(foo)".
CursorKind.CXX_NEW_EXPR = CursorKind(134)
# A delete expression for memory deallocation and destructor calls,
# e.g. "delete[] pArray".
CursorKind.CXX_DELETE_EXPR = CursorKind(135)
# Represents a unary expression.
CursorKind.CXX_UNARY_EXPR = CursorKind(136)
# ObjCStringLiteral, used for Objective-C string literals i.e. "foo".
CursorKind.OBJC_STRING_LITERAL = CursorKind(137)
# ObjCEncodeExpr, used for in Objective-C.
CursorKind.OBJC_ENCODE_EXPR = CursorKind(138)
# ObjCSelectorExpr used for in Objective-C.
CursorKind.OBJC_SELECTOR_EXPR = CursorKind(139)
# Objective-C's protocol expression.
CursorKind.OBJC_PROTOCOL_EXPR = CursorKind(140)
# An Objective-C "bridged" cast expression, which casts between
# Objective-C pointers and C pointers, transferring ownership in the process.
# \code
# NSString *str = (__bridge_transfer NSString *)CFCreateString();
# \endcode
CursorKind.OBJC_BRIDGE_CAST_EXPR = CursorKind(141)
# Represents a C++0x pack expansion that produces a sequence of
# expressions.
# A pack expansion expression contains a pattern (which itself is an
# expression) followed by an ellipsis. For example:
CursorKind.PACK_EXPANSION_EXPR = CursorKind(142)
# Represents an expression that computes the length of a parameter
# pack.
CursorKind.SIZE_OF_PACK_EXPR = CursorKind(143)
# Represents a C++ lambda expression that produces a local function
# object.
# \code
# void abssort(float *x, unsigned N) {
# std::sort(x, x + N,
# [](float a, float b) {
# return std::abs(a) < std::abs(b);
# });
# }
# \endcode
CursorKind.LAMBDA_EXPR = CursorKind(144)
# Objective-c Boolean Literal.
CursorKind.OBJ_BOOL_LITERAL_EXPR = CursorKind(145)
# Represents the "self" expression in a ObjC method.
CursorKind.OBJ_SELF_EXPR = CursorKind(146)
# OpenMP 4.0 [2.4, Array Section].
CursorKind.OMP_ARRAY_SECTION_EXPR = CursorKind(147)
# Represents an @available(...) check.
# 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.
CursorKind.UNEXPOSED_STMT = CursorKind(200)
# A labelled statement in a function.
CursorKind.LABEL_STMT = CursorKind(201)
# A compound statement
CursorKind.COMPOUND_STMT = CursorKind(202)
# A case statement.
CursorKind.CASE_STMT = CursorKind(203)
# A default statement.
CursorKind.DEFAULT_STMT = CursorKind(204)
# An if statement.
CursorKind.IF_STMT = CursorKind(205)
# A switch statement.
CursorKind.SWITCH_STMT = CursorKind(206)
# A while statement.
CursorKind.WHILE_STMT = CursorKind(207)
# A do statement.
CursorKind.DO_STMT = CursorKind(208)
# A for statement.
CursorKind.FOR_STMT = CursorKind(209)
# A goto statement.
CursorKind.GOTO_STMT = CursorKind(210)
# An indirect goto statement.
CursorKind.INDIRECT_GOTO_STMT = CursorKind(211)
# A continue statement.
CursorKind.CONTINUE_STMT = CursorKind(212)
# A break statement.
CursorKind.BREAK_STMT = CursorKind(213)
# A return statement.
CursorKind.RETURN_STMT = CursorKind(214)
# A GNU-style inline assembler statement.
CursorKind.ASM_STMT = CursorKind(215)
# Objective-C's overall @try-@catch-@finally statement.
CursorKind.OBJC_AT_TRY_STMT = CursorKind(216)
# Objective-C's @catch statement.
CursorKind.OBJC_AT_CATCH_STMT = CursorKind(217)
# Objective-C's @finally statement.
CursorKind.OBJC_AT_FINALLY_STMT = CursorKind(218)
# Objective-C's @throw statement.
CursorKind.OBJC_AT_THROW_STMT = CursorKind(219)
# Objective-C's @synchronized statement.
CursorKind.OBJC_AT_SYNCHRONIZED_STMT = CursorKind(220)
# Objective-C's autorealease pool statement.
CursorKind.OBJC_AUTORELEASE_POOL_STMT = CursorKind(221)
# Objective-C's for collection statement.
CursorKind.OBJC_FOR_COLLECTION_STMT = CursorKind(222)
# C++'s catch statement.
CursorKind.CXX_CATCH_STMT = CursorKind(223)
# C++'s try statement.
CursorKind.CXX_TRY_STMT = CursorKind(224)
# C++'s for (* : *) statement.
CursorKind.CXX_FOR_RANGE_STMT = CursorKind(225)
# Windows Structured Exception Handling's try statement.
CursorKind.SEH_TRY_STMT = CursorKind(226)
# Windows Structured Exception Handling's except statement.
CursorKind.SEH_EXCEPT_STMT = CursorKind(227)
# Windows Structured Exception Handling's finally statement.
CursorKind.SEH_FINALLY_STMT = CursorKind(228)
# A MS inline assembly statement extension.
CursorKind.MS_ASM_STMT = CursorKind(229)
# The null statement.
CursorKind.NULL_STMT = CursorKind(230)
# Adaptor class for mixing declarations with statements and expressions.
CursorKind.DECL_STMT = CursorKind(231)
# OpenMP parallel directive.
CursorKind.OMP_PARALLEL_DIRECTIVE = CursorKind(232)
# OpenMP SIMD directive.
CursorKind.OMP_SIMD_DIRECTIVE = CursorKind(233)
# OpenMP for directive.
CursorKind.OMP_FOR_DIRECTIVE = CursorKind(234)
# OpenMP sections directive.
CursorKind.OMP_SECTIONS_DIRECTIVE = CursorKind(235)
# OpenMP section directive.
CursorKind.OMP_SECTION_DIRECTIVE = CursorKind(236)
# OpenMP single directive.
CursorKind.OMP_SINGLE_DIRECTIVE = CursorKind(237)
# OpenMP parallel for directive.
CursorKind.OMP_PARALLEL_FOR_DIRECTIVE = CursorKind(238)
# OpenMP parallel sections directive.
# OpenMP task directive.
CursorKind.OMP_TASK_DIRECTIVE = CursorKind(240)
# OpenMP master directive.
CursorKind.OMP_MASTER_DIRECTIVE = CursorKind(241)
# OpenMP critical directive.
CursorKind.OMP_CRITICAL_DIRECTIVE = CursorKind(242)
# OpenMP taskyield directive.
CursorKind.OMP_TASKYIELD_DIRECTIVE = CursorKind(243)
# OpenMP barrier directive.
CursorKind.OMP_BARRIER_DIRECTIVE = CursorKind(244)
# OpenMP taskwait directive.
CursorKind.OMP_TASKWAIT_DIRECTIVE = CursorKind(245)
# OpenMP flush directive.
CursorKind.OMP_FLUSH_DIRECTIVE = CursorKind(246)
# Windows Structured Exception Handling's leave statement.
CursorKind.SEH_LEAVE_STMT = CursorKind(247)
# OpenMP ordered directive.
CursorKind.OMP_ORDERED_DIRECTIVE = CursorKind(248)
# OpenMP atomic directive.
CursorKind.OMP_ATOMIC_DIRECTIVE = CursorKind(249)
# OpenMP for SIMD directive.
CursorKind.OMP_FOR_SIMD_DIRECTIVE = CursorKind(250)
# OpenMP parallel for SIMD directive.
# OpenMP target directive.
CursorKind.OMP_TARGET_DIRECTIVE = CursorKind(252)
# OpenMP teams directive.
CursorKind.OMP_TEAMS_DIRECTIVE = CursorKind(253)
# OpenMP taskgroup directive.
CursorKind.OMP_TASKGROUP_DIRECTIVE = CursorKind(254)
# OpenMP cancellation point directive.
# OpenMP cancel directive.
CursorKind.OMP_CANCEL_DIRECTIVE = CursorKind(256)
# OpenMP target data directive.
CursorKind.OMP_TARGET_DATA_DIRECTIVE = CursorKind(257)
# OpenMP taskloop directive.
CursorKind.OMP_TASK_LOOP_DIRECTIVE = CursorKind(258)
# OpenMP taskloop simd directive.
CursorKind.OMP_TASK_LOOP_SIMD_DIRECTIVE = CursorKind(259)
# OpenMP distribute directive.
CursorKind.OMP_DISTRIBUTE_DIRECTIVE = CursorKind(260)
# OpenMP target enter data directive.
# OpenMP target exit data directive.
# OpenMP target parallel directive.
# OpenMP target parallel for directive.
# OpenMP target update directive.
CursorKind.OMP_TARGET_UPDATE_DIRECTIVE = CursorKind(265)
# OpenMP distribute parallel for directive.
# OpenMP distribute parallel for simd directive.
# OpenMP distribute simd directive.
# OpenMP target parallel for simd directive.
# OpenMP target simd directive.
CursorKind.OMP_TARGET_SIMD_DIRECTIVE = CursorKind(270)
# OpenMP teams distribute directive.
# Other Kinds
# 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.
CursorKind.TRANSLATION_UNIT = CursorKind(300)
# Attributes
# An attribute whoe specific kind is note exposed via this interface
CursorKind.UNEXPOSED_ATTR = CursorKind(400)
CursorKind.IB_ACTION_ATTR = CursorKind(401)
CursorKind.IB_OUTLET_ATTR = CursorKind(402)
CursorKind.IB_OUTLET_COLLECTION_ATTR = CursorKind(403)
CursorKind.CXX_FINAL_ATTR = CursorKind(404)
CursorKind.CXX_OVERRIDE_ATTR = CursorKind(405)
CursorKind.ANNOTATE_ATTR = CursorKind(406)
CursorKind.ASM_LABEL_ATTR = CursorKind(407)
CursorKind.PACKED_ATTR = CursorKind(408)
CursorKind.PURE_ATTR = CursorKind(409)
CursorKind.CONST_ATTR = CursorKind(410)
CursorKind.NODUPLICATE_ATTR = CursorKind(411)
CursorKind.CUDACONSTANT_ATTR = CursorKind(412)
CursorKind.CUDADEVICE_ATTR = CursorKind(413)
CursorKind.CUDAGLOBAL_ATTR = CursorKind(414)
CursorKind.CUDAHOST_ATTR = CursorKind(415)
CursorKind.CUDASHARED_ATTR = CursorKind(416)
CursorKind.VISIBILITY_ATTR = CursorKind(417)
CursorKind.DLLEXPORT_ATTR = CursorKind(418)
CursorKind.DLLIMPORT_ATTR = CursorKind(419)
CursorKind.CONVERGENT_ATTR = CursorKind(438)
CursorKind.WARN_UNUSED_ATTR = CursorKind(439)
CursorKind.WARN_UNUSED_RESULT_ATTR = CursorKind(440)
CursorKind.ALIGNED_ATTR = CursorKind(441)
# Preprocessing
CursorKind.PREPROCESSING_DIRECTIVE = CursorKind(500)
CursorKind.MACRO_DEFINITION = CursorKind(501)
CursorKind.MACRO_INSTANTIATION = CursorKind(502)
CursorKind.INCLUSION_DIRECTIVE = CursorKind(503)
# Extra declaration
# A module import declaration.
CursorKind.MODULE_IMPORT_DECL = CursorKind(600)
# A type alias template declaration
CursorKind.TYPE_ALIAS_TEMPLATE_DECL = CursorKind(601)
# A static_assert or _Static_assert node
CursorKind.STATIC_ASSERT = CursorKind(602)
# A friend declaration
CursorKind.FRIEND_DECL = CursorKind(603)
# A code completion overload candidate.
CursorKind.OVERLOAD_CANDIDATE = CursorKind(700)
### Template Argument Kinds ###
class TemplateArgumentKind(BaseEnumeration):
A TemplateArgumentKind describes the kind of entity that a template argument
# The required BaseEnumeration declarations.
_kinds = []
_name_map = None
TemplateArgumentKind.NULL = TemplateArgumentKind(0)
TemplateArgumentKind.TYPE = TemplateArgumentKind(1)
TemplateArgumentKind.DECLARATION = TemplateArgumentKind(2)
TemplateArgumentKind.NULLPTR = TemplateArgumentKind(3)
TemplateArgumentKind.INTEGRAL = TemplateArgumentKind(4)
### Exception Specification Kinds ###
class ExceptionSpecificationKind(BaseEnumeration):
An ExceptionSpecificationKind describes the kind of exception specification
that a function has.
# The required BaseEnumeration declarations.
_kinds = []
_name_map = None
def __repr__(self):
return 'ExceptionSpecificationKind.{}'.format(
ExceptionSpecificationKind.NONE = ExceptionSpecificationKind(0)
ExceptionSpecificationKind.DYNAMIC_NONE = ExceptionSpecificationKind(1)
ExceptionSpecificationKind.DYNAMIC = ExceptionSpecificationKind(2)
ExceptionSpecificationKind.MS_ANY = ExceptionSpecificationKind(3)
ExceptionSpecificationKind.BASIC_NOEXCEPT = ExceptionSpecificationKind(4)
ExceptionSpecificationKind.COMPUTED_NOEXCEPT = ExceptionSpecificationKind(5)
ExceptionSpecificationKind.UNEVALUATED = ExceptionSpecificationKind(6)
ExceptionSpecificationKind.UNINSTANTIATED = ExceptionSpecificationKind(7)
ExceptionSpecificationKind.UNPARSED = ExceptionSpecificationKind(8)
### Cursors ###
class Cursor(Structure):
The Cursor class represents a reference to an element within the AST. It
acts as a kind of iterator.
_fields_ = [("_kind_id", c_int), ("xdata", c_int), ("data", c_void_p * 3)]
def from_location(tu, location):
# We store a reference to the TU in the instance so the TU won't get
# collected before the cursor.
cursor = conf.lib.clang_getCursor(tu, location)
cursor._tu = tu
return cursor
def __eq__(self, other):
return conf.lib.clang_equalCursors(self, other)
def __ne__(self, other):
return not self.__eq__(other)
def is_definition(self):
Returns true if the declaration pointed at by the cursor is also a
definition of that entity.
return conf.lib.clang_isCursorDefinition(self)
def is_const_method(self):
"""Returns True if the cursor refers to a C++ member function or member
function template that is declared 'const'.
return conf.lib.clang_CXXMethod_isConst(self)
def is_converting_constructor(self):
"""Returns True if the cursor refers to a C++ converting constructor.
return conf.lib.clang_CXXConstructor_isConvertingConstructor(self)
def is_copy_constructor(self):
"""Returns True if the cursor refers to a C++ copy constructor.
return conf.lib.clang_CXXConstructor_isCopyConstructor(self)
def is_default_constructor(self):
"""Returns True if the cursor refers to a C++ default constructor.
return conf.lib.clang_CXXConstructor_isDefaultConstructor(self)
def is_move_constructor(self):
"""Returns True if the cursor refers to a C++ move constructor.
return conf.lib.clang_CXXConstructor_isMoveConstructor(self)
def is_default_method(self):
"""Returns True if the cursor refers to a C++ member function or member
function template that is declared '= default'.
return conf.lib.clang_CXXMethod_isDefaulted(self)
def is_mutable_field(self):
"""Returns True if the cursor refers to a C++ field that is declared
return conf.lib.clang_CXXField_isMutable(self)
def is_pure_virtual_method(self):
"""Returns True if the cursor refers to a C++ member function or member
function template that is declared pure virtual.
return conf.lib.clang_CXXMethod_isPureVirtual(self)
def is_static_method(self):
"""Returns True if the cursor refers to a C++ member function or member
function template that is declared 'static'.
return conf.lib.clang_CXXMethod_isStatic(self)
def is_virtual_method(self):
"""Returns True if the cursor refers to a C++ member function or member
function template that is declared 'virtual'.
return conf.lib.clang_CXXMethod_isVirtual(self)
def is_abstract_record(self):
"""Returns True if the cursor refers to a C++ record declaration
that has pure virtual member functions.
return conf.lib.clang_CXXRecord_isAbstract(self)
def is_scoped_enum(self):
"""Returns True if the cursor refers to a scoped enum declaration.
return conf.lib.clang_EnumDecl_isScoped(self)
def get_definition(self):
If the cursor is a reference to a declaration or a declaration of
some entity, return a cursor that points to the definition of that
# TODO: Should probably check that this is either a reference or
# declaration prior to issuing the lookup.
return conf.lib.clang_getCursorDefinition(self)
def get_usr(self):
"""Return the Unified Symbol Resolution (USR) for the entity referenced
by the given cursor (or None).
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."""
return conf.lib.clang_getCursorUSR(self)
def get_included_file(self):
"""Returns the File that is included by the current inclusion cursor."""
assert self.kind == CursorKind.INCLUSION_DIRECTIVE
return conf.lib.clang_getIncludedFile(self)
def kind(self):
"""Return the kind of this cursor."""
return CursorKind.from_id(self._kind_id)
def spelling(self):
"""Return the spelling of the entity pointed at by the cursor."""
if not hasattr(self, '_spelling'):
self._spelling = conf.lib.clang_getCursorSpelling(self)
return self._spelling
def displayname(self):
Return the display name for the entity referenced by this cursor.
The display name contains extra information that helps identify the
cursor, such as the parameters of a function or template or the
arguments of a class template specialization.
if not hasattr(self, '_displayname'):
self._displayname = conf.lib.clang_getCursorDisplayName(self)
return self._displayname
def mangled_name(self):
"""Return the mangled name for the entity referenced by this cursor."""
if not hasattr(self, '_mangled_name'):
self._mangled_name = conf.lib.clang_Cursor_getMangling(self)
return self._mangled_name
def location(self):
Return the source location (the starting character) of the entity
pointed at by the cursor.
if not hasattr(self, '_loc'):
self._loc = conf.lib.clang_getCursorLocation(self)
return self._loc
def linkage(self):
"""Return the linkage of this cursor."""
if not hasattr(self, '_linkage'):
self._linkage = conf.lib.clang_getCursorLinkage(self)
return LinkageKind.from_id(self._linkage)
def tls_kind(self):
"""Return the thread-local storage (TLS) kind of this cursor."""
if not hasattr(self, '_tls_kind'):
self._tls_kind = conf.lib.clang_getCursorTLSKind(self)
return TLSKind.from_id(self._tls_kind)
def extent(self):
Return the source range (the range of text) occupied by the entity
pointed at by the cursor.
if not hasattr(self, '_extent'):
self._extent = conf.lib.clang_getCursorExtent(self)
return self._extent
def storage_class(self):
Retrieves the storage class (if any) of the entity pointed at by the
if not hasattr(self, '_storage_class'):
self._storage_class = conf.lib.clang_Cursor_getStorageClass(self)
return StorageClass.from_id(self._storage_class)
def availability(self):
Retrieves the availability of the entity pointed at by the cursor.
if not hasattr(self, '_availability'):
self._availability = conf.lib.clang_getCursorAvailability(self)
return AvailabilityKind.from_id(self._availability)
def access_specifier(self):
Retrieves the access specifier (if any) of the entity pointed at by the
if not hasattr(self, '_access_specifier'):
self._access_specifier = conf.lib.clang_getCXXAccessSpecifier(self)
return AccessSpecifier.from_id(self._access_specifier)
def type(self):
Retrieve the Type (if any) of the entity pointed at by the cursor.
if not hasattr(self, '_type'):
self._type = conf.lib.clang_getCursorType(self)
return self._type
def canonical(self):
"""Return the canonical Cursor corresponding to this Cursor.
The canonical cursor is the cursor which is representative for the
underlying entity. For example, if you have multiple forward
declarations for the same class, the canonical cursor for the forward
declarations will be identical.
if not hasattr(self, '_canonical'):
self._canonical = conf.lib.clang_getCanonicalCursor(self)
return self._canonical
def result_type(self):
"""Retrieve the Type of the result for this Cursor."""
if not hasattr(self, '_result_type'):
self._result_type = conf.lib.clang_getCursorResultType(self)
return self._result_type
def exception_specification_kind(self):
Retrieve the exception specification kind, which is one of the values
from the ExceptionSpecificationKind enumeration.
if not hasattr(self, '_exception_specification_kind'):
exc_kind = conf.lib.clang_getCursorExceptionSpecificationType(self)
self._exception_specification_kind = ExceptionSpecificationKind.from_id(exc_kind)
return self._exception_specification_kind
def underlying_typedef_type(self):
"""Return the underlying type of a typedef declaration.
Returns a Type for the typedef this cursor is a declaration for. If
the current cursor is not a typedef, this raises.
if not hasattr(self, '_underlying_type'):
assert self.kind.is_declaration()
self._underlying_type = \
return self._underlying_type
def enum_type(self):
"""Return the integer type of an enum declaration.
Returns a Type corresponding to an integer. If the cursor is not for an
enum, this raises.
if not hasattr(self, '_enum_type'):
assert self.kind == CursorKind.ENUM_DECL
self._enum_type = conf.lib.clang_getEnumDeclIntegerType(self)
return self._enum_type
def enum_value(self):
"""Return the value of an enum constant."""
if not hasattr(self, '_enum_value'):
assert self.kind == CursorKind.ENUM_CONSTANT_DECL
# Figure out the underlying type of the enum to know if it
# is a signed or unsigned quantity.
underlying_type = self.type
if underlying_type.kind == TypeKind.ENUM:
underlying_type = underlying_type.get_declaration().enum_type
if underlying_type.kind in (TypeKind.CHAR_U,
self._enum_value = \
self._enum_value = conf.lib.clang_getEnumConstantDeclValue(self)
return self._enum_value
def objc_type_encoding(self):
"""Return the Objective-C type encoding as a str."""
if not hasattr(self, '_objc_type_encoding'):
self._objc_type_encoding = \
return self._objc_type_encoding
def hash(self):
"""Returns a hash of the cursor as an int."""
if not hasattr(self, '_hash'):
self._hash = conf.lib.clang_hashCursor(self)
return self._hash
def semantic_parent(self):
"""Return the semantic parent for this cursor."""
if not hasattr(self, '_semantic_parent'):
self._semantic_parent = conf.lib.clang_getCursorSemanticParent(self)
return self._semantic_parent
def lexical_parent(self):
"""Return the lexical parent for this cursor."""
if not hasattr(self, '_lexical_parent'):
self._lexical_parent = conf.lib.clang_getCursorLexicalParent(self)
return self._lexical_parent
def translation_unit(self):
"""Returns the TranslationUnit to which this Cursor belongs."""
# If this triggers an AttributeError, the instance was not properly
# created.
return self._tu
def referenced(self):
For a cursor that is a reference, returns a cursor
representing the entity that it references.
if not hasattr(self, '_referenced'):
self._referenced = conf.lib.clang_getCursorReferenced(self)
return self._referenced
def brief_comment(self):
"""Returns the brief comment text associated with that Cursor"""
return conf.lib.clang_Cursor_getBriefCommentText(self)
def raw_comment(self):
"""Returns the raw comment text associated with that Cursor"""
return conf.lib.clang_Cursor_getRawCommentText(self)
def get_arguments(self):
"""Return an iterator for accessing the arguments of this cursor."""
num_args = conf.lib.clang_Cursor_getNumArguments(self)
for i in range(0, num_args):
yield conf.lib.clang_Cursor_getArgument(self, i)
def get_num_template_arguments(self):
"""Returns the number of template args associated with this cursor."""
return conf.lib.clang_Cursor_getNumTemplateArguments(self)
def get_template_argument_kind(self, num):
"""Returns the TemplateArgumentKind for the indicated template
return conf.lib.clang_Cursor_getTemplateArgumentKind(self, num)
def get_template_argument_type(self, num):
"""Returns the CXType for the indicated template argument."""
return conf.lib.clang_Cursor_getTemplateArgumentType(self, num)
def get_template_argument_value(self, num):
"""Returns the value of the indicated arg as a signed 64b integer."""
return conf.lib.clang_Cursor_getTemplateArgumentValue(self, num)
def get_template_argument_unsigned_value(self, num):
"""Returns the value of the indicated arg as an unsigned 64b integer."""
return conf.lib.clang_Cursor_getTemplateArgumentUnsignedValue(self, num)
def get_children(self):
"""Return an iterator for accessing the children of this cursor."""
# FIXME: Expose iteration from CIndex, PR6125.
def visitor(child, parent, children):
# FIXME: Document this assertion in API.
# FIXME: There should just be an isNull method.
assert child != conf.lib.clang_getNullCursor()
# Create reference to TU so it isn't GC'd before Cursor.
child._tu = self._tu
return 1 # continue
children = []
conf.lib.clang_visitChildren(self, callbacks['cursor_visit'](visitor),
return iter(children)
def walk_preorder(self):
"""Depth-first preorder walk over the cursor and its descendants.
Yields cursors.
yield self
for child in self.get_children():
for descendant in child.walk_preorder():
yield descendant
def get_tokens(self):
"""Obtain Token instances formulating that compose this Cursor.
This is a generator for Token instances. It returns all tokens which
occupy the extent this cursor occupies.
return TokenGroup.get_tokens(self._tu, self.extent)
def get_field_offsetof(self):
"""Returns the offsetof the FIELD_DECL pointed by this Cursor."""
return conf.lib.clang_Cursor_getOffsetOfField(self)
def is_anonymous(self):
Check if the record is anonymous.
if self.kind == CursorKind.FIELD_DECL:
return self.type.get_declaration().is_anonymous()
return conf.lib.clang_Cursor_isAnonymous(self)
def is_bitfield(self):
Check if the field is a bitfield.
return conf.lib.clang_Cursor_isBitField(self)
def get_bitfield_width(self):
Retrieve the width of a bitfield.
return conf.lib.clang_getFieldDeclBitWidth(self)
def from_result(res, fn, args):
assert isinstance(res, Cursor)
# FIXME: There should just be an isNull method.
if res == conf.lib.clang_getNullCursor():
return None
# Store a reference to the TU in the Python object so it won't get GC'd
# before the Cursor.
tu = None
for arg in args:
if isinstance(arg, TranslationUnit):
tu = arg
if hasattr(arg, 'translation_unit'):
tu = arg.translation_unit
assert tu is not None
res._tu = tu
return res
def from_cursor_result(res, fn, args):
assert isinstance(res, Cursor)
if res == conf.lib.clang_getNullCursor():
return None
res._tu = args[0]._tu
return res
class StorageClass(object):
Describes the storage class of a declaration
# The unique kind objects, index by id.
_kinds = []
_name_map = None
def __init__(self, value):
if value >= len(StorageClass._kinds):
StorageClass._kinds += [None] * (value - len(StorageClass._kinds) + 1)
if StorageClass._kinds[value] is not None:
raise ValueError('StorageClass already loaded')
self.value = value
StorageClass._kinds[value] = self
StorageClass._name_map = None
def from_param(self):
return self.value
def name(self):
"""Get the enumeration name of this storage class."""
if self._name_map is None:
self._name_map = {}
for key,value in StorageClass.__dict__.items():
if isinstance(value,StorageClass):
self._name_map[value] = key
return self._name_map[self]
def from_id(id):
if id >= len(StorageClass._kinds) or not StorageClass._kinds[id]:
raise ValueError('Unknown storage class %d' % id)
return StorageClass._kinds[id]
def __repr__(self):
return 'StorageClass.%s' % (,)
StorageClass.INVALID = StorageClass(0)
StorageClass.NONE = StorageClass(1)
StorageClass.EXTERN = StorageClass(2)
StorageClass.STATIC = StorageClass(3)
StorageClass.PRIVATEEXTERN = StorageClass(4)
StorageClass.OPENCLWORKGROUPLOCAL = StorageClass(5)
StorageClass.AUTO = StorageClass(6)
StorageClass.REGISTER = StorageClass(7)
### Availability Kinds ###
class AvailabilityKind(BaseEnumeration):
Describes the availability of an entity.
# The unique kind objects, indexed by id.
_kinds = []
_name_map = None
def __repr__(self):
return 'AvailabilityKind.%s' % (,)
AvailabilityKind.AVAILABLE = AvailabilityKind(0)
AvailabilityKind.DEPRECATED = AvailabilityKind(1)
AvailabilityKind.NOT_AVAILABLE = AvailabilityKind(2)
AvailabilityKind.NOT_ACCESSIBLE = AvailabilityKind(3)
### C++ access specifiers ###
class AccessSpecifier(BaseEnumeration):
Describes the access of a C++ class member
# The unique kind objects, index by id.
_kinds = []
_name_map = None
def from_param(self):
return self.value
def __repr__(self):
return 'AccessSpecifier.%s' % (,)
AccessSpecifier.INVALID = AccessSpecifier(0)
AccessSpecifier.PUBLIC = AccessSpecifier(1)
AccessSpecifier.PROTECTED = AccessSpecifier(2)
AccessSpecifier.PRIVATE = AccessSpecifier(3)
AccessSpecifier.NONE = AccessSpecifier(4)
### Type Kinds ###
class TypeKind(BaseEnumeration):
Describes the kind of type.
# The unique kind objects, indexed by id.
_kinds = []
_name_map = None
def spelling(self):
"""Retrieve the spelling of this TypeKind."""
return conf.lib.clang_getTypeKindSpelling(self.value)
def __repr__(self):
return 'TypeKind.%s' % (,)
TypeKind.INVALID = TypeKind(0)
TypeKind.UNEXPOSED = TypeKind(1)
TypeKind.VOID = TypeKind(2)
TypeKind.BOOL = TypeKind(3)
TypeKind.CHAR_U = TypeKind(4)
TypeKind.UCHAR = TypeKind(5)
TypeKind.CHAR16 = TypeKind(6)
TypeKind.CHAR32 = TypeKind(7)
TypeKind.USHORT = TypeKind(8)
TypeKind.UINT = TypeKind(9)
TypeKind.ULONG = TypeKind(10)
TypeKind.ULONGLONG = TypeKind(11)
TypeKind.UINT128 = TypeKind(12)
TypeKind.CHAR_S = TypeKind(13)
TypeKind.SCHAR = TypeKind(14)
TypeKind.WCHAR = TypeKind(15)
TypeKind.SHORT = TypeKind(16)
TypeKind.INT = TypeKind(17)
TypeKind.LONG = TypeKind(18)
TypeKind.LONGLONG = TypeKind(19)
TypeKind.INT128 = TypeKind(20)
TypeKind.FLOAT = TypeKind(21)
TypeKind.DOUBLE = TypeKind(22)
TypeKind.LONGDOUBLE = TypeKind(23)
TypeKind.NULLPTR = TypeKind(24)
TypeKind.OVERLOAD = TypeKind(25)
TypeKind.DEPENDENT = TypeKind(26)
TypeKind.OBJCID = TypeKind(27)
TypeKind.OBJCCLASS = TypeKind(28)
TypeKind.OBJCSEL = TypeKind(29)
TypeKind.FLOAT128 = TypeKind(30)
TypeKind.HALF = TypeKind(31)
TypeKind.COMPLEX = TypeKind(100)
TypeKind.POINTER = TypeKind(101)
TypeKind.BLOCKPOINTER = TypeKind(102)
TypeKind.LVALUEREFERENCE = TypeKind(103)
TypeKind.RVALUEREFERENCE = TypeKind(104)
TypeKind.RECORD = TypeKind(105)
TypeKind.ENUM = TypeKind(106)
TypeKind.TYPEDEF = TypeKind(107)
TypeKind.OBJCINTERFACE = TypeKind(108)
TypeKind.OBJCOBJECTPOINTER = TypeKind(109)
TypeKind.FUNCTIONNOPROTO = TypeKind(110)
TypeKind.FUNCTIONPROTO = TypeKind(111)
TypeKind.CONSTANTARRAY = TypeKind(112)
TypeKind.VECTOR = TypeKind(113)
TypeKind.INCOMPLETEARRAY = TypeKind(114)
TypeKind.VARIABLEARRAY = TypeKind(115)
TypeKind.MEMBERPOINTER = TypeKind(117)
TypeKind.AUTO = TypeKind(118)
TypeKind.ELABORATED = TypeKind(119)
TypeKind.PIPE = TypeKind(120)
TypeKind.OCLIMAGE1DRO = TypeKind(121)
TypeKind.OCLIMAGE1DARRAYRO = TypeKind(122)
TypeKind.OCLIMAGE1DBUFFERRO = TypeKind(123)
TypeKind.OCLIMAGE2DRO = TypeKind(124)
TypeKind.OCLIMAGE2DARRAYRO = TypeKind(125)
TypeKind.OCLIMAGE2DDEPTHRO = TypeKind(126)
TypeKind.OCLIMAGE2DMSAARO = TypeKind(128)
TypeKind.OCLIMAGE3DRO = TypeKind(132)
TypeKind.OCLIMAGE1DWO = TypeKind(133)
TypeKind.OCLIMAGE1DARRAYWO = TypeKind(134)
TypeKind.OCLIMAGE1DBUFFERWO = TypeKind(135)
TypeKind.OCLIMAGE2DWO = TypeKind(136)
TypeKind.OCLIMAGE2DARRAYWO = TypeKind(137)
TypeKind.OCLIMAGE2DDEPTHWO = TypeKind(138)
TypeKind.OCLIMAGE2DMSAAWO = TypeKind(140)
TypeKind.OCLIMAGE3DWO = TypeKind(144)
TypeKind.OCLIMAGE1DRW = TypeKind(145)
TypeKind.OCLIMAGE1DARRAYRW = TypeKind(146)
TypeKind.OCLIMAGE1DBUFFERRW = TypeKind(147)
TypeKind.OCLIMAGE2DRW = TypeKind(148)
TypeKind.OCLIMAGE2DARRAYRW = TypeKind(149)
TypeKind.OCLIMAGE2DDEPTHRW = TypeKind(150)
TypeKind.OCLIMAGE2DMSAARW = TypeKind(152)
TypeKind.OCLIMAGE3DRW = TypeKind(156)
TypeKind.OCLSAMPLER = TypeKind(157)
TypeKind.OCLEVENT = TypeKind(158)
TypeKind.OCLQUEUE = TypeKind(159)
TypeKind.OCLRESERVEID = TypeKind(160)
TypeKind.EXTVECTOR = TypeKind(176)
class RefQualifierKind(BaseEnumeration):
"""Describes a specific ref-qualifier of a type."""
# The unique kind objects, indexed by id.
_kinds = []
_name_map = None
def from_param(self):
return self.value
def __repr__(self):
return 'RefQualifierKind.%s' % (,)
RefQualifierKind.NONE = RefQualifierKind(0)
RefQualifierKind.LVALUE = RefQualifierKind(1)
RefQualifierKind.RVALUE = RefQualifierKind(2)
class LinkageKind(BaseEnumeration):
"""Describes the kind of linkage of a cursor."""
# The unique kind objects, indexed by id.
_kinds = []
_name_map = None
def from_param(self):
return self.value
def __repr__(self):
return 'LinkageKind.%s' % (,)
LinkageKind.INVALID = LinkageKind(0)
LinkageKind.NO_LINKAGE = LinkageKind(1)
LinkageKind.INTERNAL = LinkageKind(2)
LinkageKind.UNIQUE_EXTERNAL = LinkageKind(3)
LinkageKind.EXTERNAL = LinkageKind(4)
class TLSKind(BaseEnumeration):
"""Describes the kind of thread-local storage (TLS) of a cursor."""
# The unique kind objects, indexed by id.
_kinds = []
_name_map = None
def from_param(self):
return self.value
def __repr__(self):
return 'TLSKind.%s' % (,)
TLSKind.NONE = TLSKind(0)
class Type(Structure):
The type of an element in the abstract syntax tree.
_fields_ = [("_kind_id", c_int), ("data", c_void_p * 2)]
def kind(self):
"""Return the kind of this type."""
return TypeKind.from_id(self._kind_id)
def argument_types(self):
"""Retrieve a container for the non-variadic arguments for this type.
The returned object is iterable and indexable. Each item in the
container is a Type instance.
class ArgumentsIterator(collections_abc.Sequence):
def __init__(self, parent):
self.parent = parent
self.length = None
def __len__(self):
if self.length is None:
self.length = conf.lib.clang_getNumArgTypes(self.parent)
return self.length
def __getitem__(self, key):
# FIXME Support slice objects.
if not isinstance(key, int):
raise TypeError("Must supply a non-negative int.")
if key < 0:
raise IndexError("Only non-negative indexes are accepted.")
if key >= len(self):
raise IndexError("Index greater than container length: "
"%d > %d" % ( key, len(self) ))
result = conf.lib.clang_getArgType(self.parent, key)
if result.kind == TypeKind.INVALID:
raise IndexError("Argument could not be retrieved.")
return result
assert self.kind == TypeKind.FUNCTIONPROTO
return ArgumentsIterator(self)
def element_type(self):
"""Retrieve the Type of elements within this Type.
If accessed on a type that is not an array, complex, or vector type, an
exception will be raised.
result = conf.lib.clang_getElementType(self)
if result.kind == TypeKind.INVALID:
raise Exception('Element type not available on this type.')
return result
def element_count(self):
"""Retrieve the number of elements in this type.
Returns an int.
If the Type is not an array or vector, this raises.
result = conf.lib.clang_getNumElements(self)
if result < 0:
raise Exception('Type does not have elements.')
return result
def translation_unit(self):
"""The TranslationUnit to which this Type is associated."""
# If this triggers an AttributeError, the instance was not properly
# instantiated.
return self._tu
def from_result(res, fn, args):
assert isinstance(res, Type)
tu = None
for arg in args:
if hasattr(arg, 'translation_unit'):
tu = arg.translation_unit
assert tu is not None
res._tu = tu
return res
def get_num_template_arguments(self):
return conf.lib.clang_Type_getNumTemplateArguments(self)
def get_template_argument_type(self, num):
return conf.lib.clang_Type_getTemplateArgumentAsType(self, num)
def get_canonical(self):
Return the canonical type for a Type.
Clang's type system explicitly models typedefs and all the
ways a specific type can be represented. The canonical type
is the underlying type with all the "sugar" removed. For
example, if 'T' is a typedef for 'int', the canonical type for
'T' would be 'int'.
return conf.lib.clang_getCanonicalType(self)
def is_const_qualified(self):
"""Determine whether a Type has the "const" qualifier set.
This does not look through typedefs that may have added "const"
at a different level.
return conf.lib.clang_isConstQualifiedType(self)
def is_volatile_qualified(self):
"""Determine whether a Type has the "volatile" qualifier set.
This does not look through typedefs that may have added "volatile"
at a different level.
return conf.lib.clang_isVolatileQualifiedType(self)
def is_restrict_qualified(self):
"""Determine whether a Type has the "restrict" qualifier set.
This does not look through typedefs that may have added "restrict" at
a different level.
return conf.lib.clang_isRestrictQualifiedType(self)
def is_function_variadic(self):
"""Determine whether this function Type is a variadic function type."""
assert self.kind == TypeKind.FUNCTIONPROTO
return conf.lib.clang_isFunctionTypeVariadic(self)
def get_address_space(self):
return conf.lib.clang_getAddressSpace(self)
def get_typedef_name(self):
return conf.lib.clang_getTypedefName(self)
def is_pod(self):
"""Determine whether this Type represents plain old data (POD)."""
return conf.lib.clang_isPODType(self)
def get_pointee(self):
For pointer types, returns the type of the pointee.
return conf.lib.clang_getPointeeType(self)
def get_declaration(self):
Return the cursor for the declaration of the given type.
return conf.lib.clang_getTypeDeclaration(self)
def get_result(self):
Retrieve the result type associated with a function type.
return conf.lib.clang_getResultType(self)
def get_array_element_type(self):
Retrieve the type of the elements of the array type.
return conf.lib.clang_getArrayElementType(self)
def get_array_size(self):
Retrieve the size of the constant array.
return conf.lib.clang_getArraySize(self)
def get_class_type(self):
Retrieve the class type of the member pointer type.
return conf.lib.clang_Type_getClassType(self)
def get_named_type(self):
Retrieve the type named by the qualified-id.
return conf.lib.clang_Type_getNamedType(self)
def get_align(self):
Retrieve the alignment of the record.
return conf.lib.clang_Type_getAlignOf(self)
def get_size(self):
Retrieve the size of the record.
return conf.lib.clang_Type_getSizeOf(self)
def get_offset(self, fieldname):
Retrieve the offset of a field in the record.
return conf.lib.clang_Type_getOffsetOf(self, fieldname)
def get_ref_qualifier(self):
Retrieve the ref-qualifier of the type.
return RefQualifierKind.from_id(
def get_fields(self):
"""Return an iterator for accessing the fields of this type."""
def visitor(field, children):
assert field != conf.lib.clang_getNullCursor()
# Create reference to TU so it isn't GC'd before Cursor.
field._tu = self._tu
return 1 # continue
fields = []
callbacks['fields_visit'](visitor), fields)
return iter(fields)
def get_exception_specification_kind(self):
Return the kind of the exception specification; a value from
the ExceptionSpecificationKind enumeration.
return ExceptionSpecificationKind.from_id(
def spelling(self):
"""Retrieve the spelling of this Type."""
return conf.lib.clang_getTypeSpelling(self)
def __eq__(self, other):
if type(other) != type(self):
return False
return conf.lib.clang_equalTypes(self, other)
def __ne__(self, other):
return not self.__eq__(other)
## CIndex Objects ##
# CIndex objects (derived from ClangObject) are essentially lightweight
# wrappers attached to some underlying object, which is exposed via CIndex as
# a void*.
class ClangObject(object):
A helper for Clang objects. This class helps act as an intermediary for
the ctypes library and the Clang CIndex library.
def __init__(self, obj):
assert isinstance(obj, c_object_p) and obj
self.obj = self._as_parameter_ = obj
def from_param(self):
return self._as_parameter_
class _CXUnsavedFile(Structure):
"""Helper for passing unsaved file arguments."""
_fields_ = [("name", c_char_p), ("contents", c_char_p), ('length', c_ulong)]
# Functions calls through the python interface are rather slow. Fortunately,
# for most symboles, we do not need to perform a function call. Their spelling
# never changes and is consequently provided by this spelling cache.
SpellingCache = {
# 0: CompletionChunk.Kind("Optional"),
# 1: CompletionChunk.Kind("TypedText"),
# 2: CompletionChunk.Kind("Text"),
# 3: CompletionChunk.Kind("Placeholder"),
# 4: CompletionChunk.Kind("Informative"),
# 5 : CompletionChunk.Kind("CurrentParameter"),
6: '(', # CompletionChunk.Kind("LeftParen"),
7: ')', # CompletionChunk.Kind("RightParen"),
8: '[', # CompletionChunk.Kind("LeftBracket"),
9: ']', # CompletionChunk.Kind("RightBracket"),
10: '{', # CompletionChunk.Kind("LeftBrace"),
11: '}', # CompletionChunk.Kind("RightBrace"),
12: '<', # CompletionChunk.Kind("LeftAngle"),
13: '>', # CompletionChunk.Kind("RightAngle"),
14: ', ', # CompletionChunk.Kind("Comma"),
# 15: CompletionChunk.Kind("ResultType"),
16: ':', # CompletionChunk.Kind("Colon"),
17: ';', # CompletionChunk.Kind("SemiColon"),
18: '=', # CompletionChunk.Kind("Equal"),
19: ' ', # CompletionChunk.Kind("HorizontalSpace"),
# 20: CompletionChunk.Kind("VerticalSpace")
class CompletionChunk(object):
class Kind(object):
def __init__(self, name): = name
def __str__(self):
def __repr__(self):
return "<ChunkKind: %s>" % self
def __init__(self, completionString, key):
self.cs = completionString
self.key = key
self.__kindNumberCache = -1
def __repr__(self):
return "{'" + self.spelling + "', " + str(self.kind) + "}"
def spelling(self):
if self.__kindNumber in SpellingCache:
return SpellingCache[self.__kindNumber]
return conf.lib.clang_getCompletionChunkText(self.cs, self.key)
# We do not use @CachedProperty here, as the manual implementation is
# apparently still significantly faster. Please profile carefully if you
# would like to add CachedProperty back.
def __kindNumber(self):
if self.__kindNumberCache == -1:
self.__kindNumberCache = \
conf.lib.clang_getCompletionChunkKind(self.cs, self.key)
return self.__kindNumberCache
def kind(self):
return completionChunkKindMap[self.__kindNumber]
def string(self):
res = conf.lib.clang_getCompletionChunkCompletionString(self.cs,
if (res):
return CompletionString(res)
def isKindOptional(self):
return self.__kindNumber == 0
def isKindTypedText(self):
return self.__kindNumber == 1
def isKindPlaceHolder(self):
return self.__kindNumber == 3
def isKindInformative(self):
return self.__kindNumber == 4
def isKindResultType(self):
return self.__kindNumber == 15
completionChunkKindMap = {
0: CompletionChunk.Kind("Optional"),
1: CompletionChunk.Kind("TypedText"),
2: CompletionChunk.Kind("Text"),
3: CompletionChunk.Kind("Placeholder"),
4: CompletionChunk.Kind("Informative"),
5: CompletionChunk.Kind("CurrentParameter"),
6: CompletionChunk.Kind("LeftParen"),
7: CompletionChunk.Kind("RightParen"),
8: CompletionChunk.Kind("LeftBracket"),
9: CompletionChunk.Kind("RightBracket"),
10: CompletionChunk.Kind("LeftBrace"),
11: CompletionChunk.Kind("RightBrace"),
12: CompletionChunk.Kind("LeftAngle"),
13: CompletionChunk.Kind("RightAngle"),
14: CompletionChunk.Kind("Comma"),
15: CompletionChunk.Kind("ResultType"),
16: CompletionChunk.Kind("Colon"),
17: CompletionChunk.Kind("SemiColon"),
18: CompletionChunk.Kind("Equal"),
19: CompletionChunk.Kind("HorizontalSpace"),
20: CompletionChunk.Kind("VerticalSpace")}
class CompletionString(ClangObject):
class Availability(object):
def __init__(self, name): = name
def __str__(self):
def __repr__(self):
return "<Availability: %s>" % self
def __len__(self):
return self.num_chunks
def num_chunks(self):
return conf.lib.clang_getNumCompletionChunks(self.obj)
def __getitem__(self, key):
if self.num_chunks <= key:
raise IndexError
return CompletionChunk(self.obj, key)
def priority(self):
return conf.lib.clang_getCompletionPriority(self.obj)
def availability(self):
res = conf.lib.clang_getCompletionAvailability(self.obj)
return availabilityKinds[res]
def briefComment(self):
if conf.function_exists("clang_getCompletionBriefComment"):
return conf.lib.clang_getCompletionBriefComment(self.obj)
return _CXString()
def __repr__(self):
return " | ".join([str(a) for a in self]) \
+ " || Priority: " + str(self.priority) \
+ " || Availability: " + str(self.availability) \
+ " || Brief comment: " + str(self.briefComment)
availabilityKinds = {
0: CompletionChunk.Kind("Available"),
1: CompletionChunk.Kind("Deprecated"),
2: CompletionChunk.Kind("NotAvailable"),
3: CompletionChunk.Kind("NotAccessible")}
class CodeCompletionResult(Structure):
_fields_ = [('cursorKind', c_int), ('completionString', c_object_p)]
def __repr__(self):
return str(CompletionString(self.completionString))
def kind(self):
return CursorKind.from_id(self.cursorKind)
def string(self):
return CompletionString(self.completionString)
class CCRStructure(Structure):
_fields_ = [('results', POINTER(CodeCompletionResult)),
('numResults', c_int)]
def __len__(self):
return self.numResults
def __getitem__(self, key):
if len(self) <= key:
raise IndexError
return self.results[key]
class CodeCompletionResults(ClangObject):
def __init__(self, ptr):
assert isinstance(ptr, POINTER(CCRStructure)) and ptr
self.ptr = self._as_parameter_ = ptr
def from_param(self):
return self._as_parameter_
def __del__(self):
def results(self):
return self.ptr.contents
def diagnostics(self):
class DiagnosticsItr(object):
def __init__(self, ccr):
self.ccr= ccr
def __len__(self):
return int(\
def __getitem__(self, key):
return conf.lib.clang_codeCompleteGetDiagnostic(self.ccr, key)
return DiagnosticsItr(self)
class Index(ClangObject):
The Index type provides the primary interface to the Clang CIndex library,
primarily by providing an interface for reading and parsing translation
def create(excludeDecls=False):
Create a new Index.
excludeDecls -- Exclude local declarations from translation units.
return Index(conf.lib.clang_createIndex(excludeDecls, 0))
def __del__(self):
def read(self, path):
"""Load a TranslationUnit from the given AST file."""
return TranslationUnit.from_ast_file(path, self)
def parse(self, path, args=None, unsaved_files=None, options = 0):
"""Load the translation unit from the given source code file by running
clang and generating the AST before loading. Additional command line
parameters can be passed to clang via the args parameter.
In-memory contents for files can be provided by passing a list of pairs
to as unsaved_files, the first item should be the filenames to be mapped
and the second should be the contents to be substituted for the
file. The contents may be passed as strings or file objects.
If an error was encountered during parsing, a TranslationUnitLoadError
will be raised.
return TranslationUnit.from_source(path, args, unsaved_files, options,
class TranslationUnit(ClangObject):
"""Represents a source code translation unit.
This is one of the main types in the API. Any time you wish to interact
with Clang's representation of a source file, you typically start with a
translation unit.
# Default parsing mode.
# Instruct the parser to create a detailed processing record containing
# metadata not normally retained.
# Indicates that the translation unit is incomplete. This is typically used
# when parsing headers.
# Instruct the parser to create a pre-compiled preamble for the translation
# unit. This caches the preamble (included files at top of source file).
# This is useful if the translation unit will be reparsed and you don't
# want to incur the overhead of reparsing the preamble.
# Cache code completion information on parse. This adds time to parsing but
# speeds up code completion.
# Flags with values 16 and 32 are deprecated and intentionally omitted.
# Do not parse function bodies. This is useful if you only care about
# searching for declarations/definitions.
# Used to indicate that brief documentation comments should be included
# into the set of code completions returned from this translation unit.
def from_source(cls, filename, args=None, unsaved_files=None, options=0,
"""Create a TranslationUnit by parsing source.
This is capable of processing source code both from files on the
filesystem as well as in-memory contents.
Command-line arguments that would be passed to clang are specified as
a list via args. These can be used to specify include paths, warnings,
etc. e.g. ["-Wall", "-I/path/to/include"].
In-memory file content can be provided via unsaved_files. This is an
iterable of 2-tuples. The first element is the filename (str or
PathLike). The second element defines the content. Content can be
provided as str source code or as file objects (anything with a read()
method). If a file object is being used, content will be read until EOF
and the read cursor will not be reset to its original position.
options is a bitwise or of TranslationUnit.PARSE_XXX flags which will
control parsing behavior.
index is an Index instance to utilize. If not provided, a new Index
will be created for this TranslationUnit.
To parse source from the filesystem, the filename of the file to parse
is specified by the filename argument. Or, filename could be None and
the args list would contain the filename(s) to parse.
To parse source from an in-memory buffer, set filename to the virtual
filename you wish to associate with this source (e.g. "test.c"). The
contents of that file are then provided in unsaved_files.
If an error occurs, a TranslationUnitLoadError is raised.
Please note that a TranslationUnit with parser errors may be returned.
It is the caller's responsibility to check tu.diagnostics for errors.
Also note that Clang infers the source language from the extension of
the input filename. If you pass in source code containing a C++ class
declaration with the filename "test.c" parsing will fail.
if args is None:
args = []
if unsaved_files is None:
unsaved_files = []
if index is None:
index = Index.create()
args_array = None
if len(args) > 0:
args_array = (c_char_p * len(args))(*[b(x) for x in args])
unsaved_array = None
if len(unsaved_files) > 0:
unsaved_array = (_CXUnsavedFile * len(unsaved_files))()
for i, (name, contents) in enumerate(unsaved_files):
if hasattr(contents, "read"):
contents =
contents = b(contents)
unsaved_array[i].name = b(fspath(name))
unsaved_array[i].contents = contents
unsaved_array[i].length = len(contents)
ptr = conf.lib.clang_parseTranslationUnit(index,
fspath(filename) if filename is not None else None,
len(args), unsaved_array,
len(unsaved_files), options)
if not ptr:
raise TranslationUnitLoadError("Error parsing translation unit.")
return cls(ptr, index=index)
def from_ast_file(cls, filename, index=None):
"""Create a TranslationUnit instance from a saved AST file.
A previously-saved AST file (provided with -emit-ast or is loaded from the filename specified.
If the file cannot be loaded, a TranslationUnitLoadError will be
index is optional and is the Index instance to use. If not provided,
a default Index will be created.
filename can be str or PathLike.
if index is None:
index = Index.create()
ptr = conf.lib.clang_createTranslationUnit(index, fspath(filename))
if not ptr:
raise TranslationUnitLoadError(filename)
return cls(ptr=ptr, index=index)
def __init__(self, ptr, index):
"""Create a TranslationUnit instance.
TranslationUnits should be created using one of the from_* @classmethod
functions above. __init__ is only called internally.
assert isinstance(index, Index)
self.index = index
ClangObject.__init__(self, ptr)
def __del__(self):
def cursor(self):
"""Retrieve the cursor that represents the given translation unit."""
return conf.lib.clang_getTranslationUnitCursor(self)
def spelling(self):
"""Get the original translation unit source file name."""
return conf.lib.clang_getTranslationUnitSpelling(self)
def get_includes(self):
Return an iterable sequence of FileInclusion objects that describe the
sequence of inclusions in a translation unit. The first object in
this sequence is always the input file. Note that this method will not
recursively iterate over header files included through precompiled
def visitor(fobj, lptr, depth, includes):
if depth > 0:
loc = lptr.contents
includes.append(FileInclusion(loc.file, File(fobj), loc, depth))
# Automatically adapt CIndex/ctype pointers to python objects
includes = []
callbacks['translation_unit_includes'](visitor), includes)
return iter(includes)
def get_file(self, filename):
"""Obtain a File from this translation unit."""
return File.from_name(self, filename)
def get_location(self, filename, position):
"""Obtain a SourceLocation for a file in this translation unit.
The position can be specified by passing:
- Integer file offset. Initial file offset is 0.
- 2-tuple of (line number, column number). Initial file position is
(0, 0)
f = self.get_file(filename)
if isinstance(position, int):
return SourceLocation.from_offset(self, f, position)
return SourceLocation.from_position(self, f, position[0], position[1])
def get_extent(self, filename, locations):
"""Obtain a SourceRange from this translation unit.
The bounds of the SourceRange must ultimately be defined by a start and
end SourceLocation. For the locations argument, you can pass:
- 2 SourceLocation instances in a 2-tuple or list.
- 2 int file offsets via a 2-tuple or list.
- 2 2-tuple or lists of (line, column) pairs in a 2-tuple or list.
get_extent('foo.c', (5, 10))
get_extent('foo.c', ((1, 1), (1, 15)))
f = self.get_file(filename)
if len(locations) < 2:
raise Exception('Must pass object with at least 2 elements')
start_location, end_location = locations
if hasattr(start_location, '__len__'):
start_location = SourceLocation.from_position(self, f,
start_location[0], start_location[1])
elif isinstance(start_location, int):
start_location = SourceLocation.from_offset(self, f,
if hasattr(end_location, '__len__'):
end_location = SourceLocation.from_position(self, f,
end_location[0], end_location[1])
elif isinstance(end_location, int):
end_location = SourceLocation.from_offset(self, f, end_location)
assert isinstance(start_location, SourceLocation)
assert isinstance(end_location, SourceLocation)
return SourceRange.from_locations(start_location, end_location)
def diagnostics(self):
Return an iterable (and indexable) object containing the diagnostics.
class DiagIterator(object):
def __init__(self, tu):
self.tu = tu
def __len__(self):
return int(conf.lib.clang_getNumDiagnostics(self.tu))
def __getitem__(self, key):
diag = conf.lib.clang_getDiagnostic(self.tu, key)
if not diag:
raise IndexError
return Diagnostic(diag)
return DiagIterator(self)
def reparse(self, unsaved_files=None, options=0):
Reparse an already parsed translation unit.
In-memory contents for files can be provided by passing a list of pairs
as unsaved_files, the first items should be the filenames to be mapped
and the second should be the contents to be substituted for the
file. The contents may be passed as strings or file objects.
if unsaved_files is None:
unsaved_files = []
unsaved_files_array = 0
if len(unsaved_files):
unsaved_files_array = (_CXUnsavedFile * len(unsaved_files))()
for i,(name,contents) in enumerate(unsaved_files):
if hasattr(contents, "read"):
contents =
contents = b(contents)
unsaved_files_array[i].name = b(fspath(name))
unsaved_files_array[i].contents = contents
unsaved_files_array[i].length = len(contents)
ptr = conf.lib.clang_reparseTranslationUnit(self, len(unsaved_files),
unsaved_files_array, options)
def save(self, filename):
"""Saves the TranslationUnit to a file.
This is equivalent to passing -emit-ast to the clang frontend. The
saved file can be loaded back into a TranslationUnit. Or, if it
corresponds to a header, it can be used as a pre-compiled header file.
If an error occurs while saving, a TranslationUnitSaveError is raised.
If the error was TranslationUnitSaveError.ERROR_INVALID_TU, this means
the constructed TranslationUnit was not valid at time of save. In this
case, the reason(s) why should be available via
filename -- The path to save the translation unit to (str or PathLike).
options = conf.lib.clang_defaultSaveOptions(self)
result = int(conf.lib.clang_saveTranslationUnit(self, fspath(filename),
if result != 0:
raise TranslationUnitSaveError(result,
'Error saving TranslationUnit.')
def codeComplete(self, path, line, column, unsaved_files=None,
include_macros=False, include_code_patterns=False,
Code complete in this translation unit.
In-memory contents for files can be provided by passing a list of pairs
as unsaved_files, the first items should be the filenames to be mapped
and the second should be the contents to be substituted for the
file. The contents may be passed as strings or file objects.
options = 0
if include_macros:
options += 1
if include_code_patterns:
options += 2
if include_brief_comments:
options += 4
if unsaved_files is None:
unsaved_files = []
unsaved_files_array = 0
if len(unsaved_files):
unsaved_files_array = (_CXUnsavedFile * len(unsaved_files))()
for i,(name,contents) in enumerate(unsaved_files):
if hasattr(contents, "read"):
contents =
contents = b(contents)
unsaved_files_array[i].name = b(fspath(name))
unsaved_files_array[i].contents = contents
unsaved_files_array[i].length = len(contents)
ptr = conf.lib.clang_codeCompleteAt(self, fspath(path), line, column,
unsaved_files_array, len(unsaved_files), options)
if ptr:
return CodeCompletionResults(ptr)
return None
def get_tokens(self, locations=None, extent=None):
"""Obtain tokens in this translation unit.
This is a generator for Token instances. The caller specifies a range
of source code to obtain tokens for. The range can be specified as a
2-tuple of SourceLocation or as a SourceRange. If both are defined,
behavior is undefined.
if locations is not None:
extent = SourceRange(start=locations[0], end=locations[1])
return TokenGroup.get_tokens(self, extent)
class File(ClangObject):
The File class represents a particular source file that is part of a
translation unit.
def from_name(translation_unit, file_name):
"""Retrieve a file handle within the given translation unit."""
return File(conf.lib.clang_getFile(translation_unit, fspath(file_name)))
def name(self):
"""Return the complete file and path name of the file."""
return conf.lib.clang_getFileName(self)
def time(self):
"""Return the last modification time of the file."""
return conf.lib.clang_getFileTime(self)
def __str__(self):
def __repr__(self):
return "<File: %s>" % (
def from_result(res, fn, args):
assert isinstance(res, c_object_p)
res = File(res)
# Copy a reference to the TranslationUnit to prevent premature GC.
res._tu = args[0]._tu
return res
class FileInclusion(object):
The FileInclusion class represents the inclusion of one source file by
another via a '#include' directive or as the input file for the translation
unit. This class provides information about the included file, the including
file, the location of the '#include' directive and the depth of the included
file in the stack. Note that the input file has depth 0.
def __init__(self, src, tgt, loc, depth):
self.source = src
self.include = tgt
self.location = loc
self.depth = depth
def is_input_file(self):
"""True if the included file is the input file."""
return self.depth == 0
class CompilationDatabaseError(Exception):
"""Represents an error that occurred when working with a CompilationDatabase
Each error is associated to an enumerated value, accessible under
e.cdb_error. Consumers can compare the value with one of the ERROR_
constants in this class.
# An unknown error occurred
# The database could not be loaded
def __init__(self, enumeration, message):
assert isinstance(enumeration, int)
if enumeration > 1:
raise Exception("Encountered undefined CompilationDatabase error "
"constant: %d. Please file a bug to have this "
"value supported." % enumeration)
self.cdb_error = enumeration
Exception.__init__(self, 'Error %d: %s' % (enumeration, message))
class CompileCommand(object):
"""Represents the compile command used to build a file"""
def __init__(self, cmd, ccmds):
self.cmd = cmd
# Keep a reference to the originating CompileCommands
# to prevent garbage collection
self.ccmds = ccmds
def directory(self):
"""Get the working directory for this CompileCommand"""
return conf.lib.clang_CompileCommand_getDirectory(self.cmd)
def filename(self):
"""Get the working filename for this CompileCommand"""
return conf.lib.clang_CompileCommand_getFilename(self.cmd)
def arguments(self):
Get an iterable object providing each argument in the
command line for the compiler invocation as a _CXString.
Invariant : the first argument is the compiler executable
length = conf.lib.clang_CompileCommand_getNumArgs(self.cmd)
for i in range(length):
yield conf.lib.clang_CompileCommand_getArg(self.cmd, i)
class CompileCommands(object):