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pjs/dom/bindings/parser/WebIDL.py

2874 строки
87 KiB
Python
Исходник Ответственный История

# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is WebIDL Parser.
#
# The Initial Developer of the Original Code is
# the Mozilla Foundation.
# Portions created by the Initial Developer are Copyright (C) 2011
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Kyle Huey <me@kylehuey.com>
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
""" A WebIDL parser. """
from ply import lex, yacc
import re
# Machinery
def parseInt(literal):
string = literal
sign = 0
base = 0
if string[0] == '-':
sign = -1
string = string[1:]
else:
sign = 1
if string[0] == '0' and len(string) > 1:
if string[1] == 'x' or string[1] == 'X':
base = 16
string = string[2:]
else:
base = 8
string = string[1:]
else:
base = 10
value = int(string, base)
return value * sign
# Magic for creating enums
def M_add_class_attribs(attribs):
def foo(name, bases, dict_):
for v, k in enumerate(attribs):
dict_[k] = v
assert 'length' not in dict_
dict_['length'] = len(attribs)
return type(name, bases, dict_)
return foo
def enum(*names):
class Foo(object):
__metaclass__ = M_add_class_attribs(names)
def __setattr__(self, name, value): # this makes it read-only
raise NotImplementedError
return Foo()
class WebIDLError(Exception):
def __init__(self, message, location, warning=False):
self.message = message
self.location = location
self.warning = warning
def __str__(self):
return "%s: %s%s%s" % (self.warning and 'warning' or 'error',
self.message, ", " if self.location else "",
self.location)
class Location(object):
def __init__(self, lexer, lineno, lexpos, filename):
self._line = None
self._lineno = lineno
self._lexpos = lexpos
self._lexdata = lexer.lexdata
self._file = filename if filename else "<unknown>"
def __eq__(self, other):
return self._lexpos == other._lexpos and \
self._file == other._file
def filename(self):
return self._file
def resolve(self):
if self._line:
return
startofline = self._lexdata.rfind('\n', 0, self._lexpos) + 1
endofline = self._lexdata.find('\n', self._lexpos, self._lexpos + 80)
if endofline != -1:
self._line = self._lexdata[startofline:endofline]
else:
self._line = self._lexdata[startofline:]
self._colno = self._lexpos - startofline
def get(self):
self.resolve()
return "%s line %s:%s" % (self._file, self._lineno, self._colno)
def _pointerline(self):
return " " * self._colno + "^"
def __str__(self):
self.resolve()
return "%s line %s:%s\n%s\n%s" % (self._file, self._lineno, self._colno,
self._line, self._pointerline())
class BuiltinLocation(object):
def __init__(self, text):
self.msg = text
def __eq__(self, other):
return isinstance(other, BuiltinLocation) and \
self.msg == other.msg
def filename(self):
return '<builtin>'
def resolve(self):
pass
def get(self):
return self.msg
def __str__(self):
return self.get()
# Data Model
class IDLObject(object):
def __init__(self, location):
self.location = location
self.userData = dict()
def filename(self):
return self.location.filename()
def isInterface(self):
return False
def isEnum(self):
return False
def isCallback(self):
return False
def isType(self):
return False
def getUserData(self, key, default):
return self.userData.get(key, default)
def setUserData(self, key, value):
self.userData[key] = value
def addExtendedAttributes(self, attrs):
assert False # Override me!
def handleExtendedAttribute(self, attr, value):
assert False # Override me!
class IDLScope(IDLObject):
def __init__(self, location, parentScope, identifier):
IDLObject.__init__(self, location)
self.parentScope = parentScope
if identifier:
assert isinstance(identifier, IDLIdentifier)
self._name = identifier
else:
self._name = None
self._dict = {}
def __str__(self):
return self.QName()
def QName(self):
if self._name:
return self._name.QName() + "::"
return "::"
def ensureUnique(self, identifier, object):
"""
Ensure that there is at most one 'identifier' in scope ('self').
Note that object can be None. This occurs if we end up here for an
interface type we haven't seen yet.
"""
assert isinstance(identifier, IDLUnresolvedIdentifier)
assert not object or isinstance(object, IDLObjectWithIdentifier)
assert not object or object.identifier == identifier
if identifier.name in self._dict:
if not object:
return
# ensureUnique twice with the same object is not allowed
assert object != self._dict[identifier.name]
replacement = self.resolveIdentifierConflict(self, identifier,
self._dict[identifier.name],
object)
self._dict[identifier.name] = replacement
return
assert object
self._dict[identifier.name] = object
def resolveIdentifierConflict(self, scope, identifier, originalObject, newObject):
if isinstance(originalObject, IDLExternalInterface) and \
isinstance(newObject, IDLExternalInterface) and \
originalObject.identifier.name == newObject.identifier.name:
return originalObject
# Default to throwing, derived classes can override.
conflictdesc = "\n\t%s at %s\n\t%s at %s" % \
(originalObject, originalObject.location, newObject, newObject.location)
raise WebIDLError(
"Multiple unresolvable definitions of identifier '%s' in scope '%s%s"
% (identifier.name, str(self), conflictdesc), "")
def _lookupIdentifier(self, identifier):
return self._dict[identifier.name]
def lookupIdentifier(self, identifier):
assert isinstance(identifier, IDLIdentifier)
assert identifier.scope == self
return self._lookupIdentifier(identifier)
class IDLIdentifier(IDLObject):
def __init__(self, location, scope, name):
IDLObject.__init__(self, location)
self.name = name
assert isinstance(scope, IDLScope)
self.scope = scope
def __str__(self):
return self.QName()
def QName(self):
return self.scope.QName() + self.name
def __hash__(self):
return self.QName().__hash__()
def __eq__(self, other):
return self.QName() == other.QName()
def object(self):
return self.scope.lookupIdentifier(self)
class IDLUnresolvedIdentifier(IDLObject):
def __init__(self, location, name, allowDoubleUnderscore = False,
allowForbidden = False):
IDLObject.__init__(self, location)
assert len(name) > 0
if name[:2] == "__" and not allowDoubleUnderscore:
raise WebIDLError("Identifiers beginning with __ are reserved",
location)
if name[0] == '_' and not allowDoubleUnderscore:
name = name[1:]
if name in ["prototype", "constructor", "toString"] and not allowForbidden:
raise WebIDLError("Cannot use reserved identifier '%s'" % (name),
location)
self.name = name
def __str__(self):
return self.QName()
def QName(self):
return "<unresolved scope>::" + self.name
def resolve(self, scope, object):
assert isinstance(scope, IDLScope)
assert not object or isinstance(object, IDLObjectWithIdentifier)
assert not object or object.identifier == self
scope.ensureUnique(self, object)
identifier = IDLIdentifier(self.location, scope, self.name)
if object:
object.identifier = identifier
return identifier
def finish(self):
assert False # Should replace with a resolved identifier first.
class IDLObjectWithIdentifier(IDLObject):
def __init__(self, location, parentScope, identifier):
IDLObject.__init__(self, location)
assert isinstance(identifier, IDLUnresolvedIdentifier)
self.identifier = identifier
if parentScope:
self.resolve(parentScope)
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
assert isinstance(self.identifier, IDLUnresolvedIdentifier)
self.identifier.resolve(parentScope, self)
class IDLObjectWithScope(IDLObjectWithIdentifier, IDLScope):
def __init__(self, location, parentScope, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
IDLObjectWithIdentifier.__init__(self, location, parentScope, identifier)
IDLScope.__init__(self, location, parentScope, self.identifier)
class IDLParentPlaceholder(IDLObjectWithIdentifier):
def __init__(self, location, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
def finish(self, scope):
try:
scope._lookupIdentifier(self.identifier)
except:
raise WebIDLError("Unresolved type '%s'." % self.identifier, self.location)
iface = self.identifier.resolve(scope, None)
return scope.lookupIdentifier(iface)
class IDLExternalInterface(IDLObjectWithIdentifier):
def __init__(self, location, parentScope, identifier):
assert isinstance(identifier, IDLUnresolvedIdentifier)
assert isinstance(parentScope, IDLScope)
self.parent = None
IDLObjectWithIdentifier.__init__(self, location, parentScope, identifier)
IDLObjectWithIdentifier.resolve(self, parentScope)
def finish(self, scope):
pass
def isExternal(self):
return True
def isInterface(self):
return True
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def resolve(self, parentScope):
pass
class IDLInterface(IDLObjectWithScope):
def __init__(self, location, parentScope, name, parent, members):
assert isinstance(parentScope, IDLScope)
assert isinstance(name, IDLUnresolvedIdentifier)
assert not parent or isinstance(parent, IDLParentPlaceholder)
self.parent = parent
self._callback = False
self._finished = False
self.members = list(members) # clone the list
IDLObjectWithScope.__init__(self, location, parentScope, name)
def __str__(self):
return "Interface '%s'" % self.identifier.name
def ctor(self):
identifier = IDLUnresolvedIdentifier(self.location, "constructor",
allowForbidden=True)
try:
return self._lookupIdentifier(identifier)
except:
return None
def resolveIdentifierConflict(self, scope, identifier, originalObject, newObject):
assert isinstance(scope, IDLScope)
assert isinstance(originalObject, IDLInterfaceMember)
assert isinstance(newObject, IDLInterfaceMember)
if originalObject.tag != IDLInterfaceMember.Tags.Method or \
newObject.tag != IDLInterfaceMember.Tags.Method:
# Call the base class method, which will throw
IDLScope.resolveIdentifierConflict(self, identifier, originalObject,
newObject)
assert False # Not reached
retval = originalObject.addOverload(newObject)
# Might be a ctor, which isn't in self.members
if newObject in self.members:
self.members.remove(newObject)
return retval
def finish(self, scope):
if self._finished:
return
self._finished = True
assert not self.parent or isinstance(self.parent, IDLParentPlaceholder)
parent = self.parent.finish(scope) if self.parent else None
assert not parent or isinstance(parent, IDLInterface)
self.parent = parent
assert iter(self.members)
if self.parent:
self.parent.finish(scope)
assert iter(self.parent.members)
members = list(self.parent.members)
members.extend(self.members)
else:
members = list(self.members)
def memberNotOnParentChain(member, iface):
assert iface
if not iface.parent:
return True
assert isinstance(iface.parent, IDLInterface)
if member in iface.parent.members:
return False
return memberNotOnParentChain(member, iface.parent)
# Ensure that there's at most one of each {named,indexed}
# {getter,setter,creator,deleter}.
specialMembersSeen = set()
for member in members:
if memberNotOnParentChain(member, self):
member.resolve(self)
if member.tag != IDLInterfaceMember.Tags.Method:
continue
if member.isGetter():
memberType = "getters"
elif member.isSetter():
memberType = "setters"
elif member.isCreator():
memberType = "creators"
elif member.isDeleter():
memberType = "deleters"
else:
continue
if member.isNamed():
memberType = "named " + memberType
elif member.isIndexed():
memberType = "indexed " + memberType
else:
continue
if memberType in specialMembersSeen:
raise WebIDLError("Multiple " + memberType + " on %s" % (self),
self.location)
specialMembersSeen.add(memberType)
for member in self.members:
member.finish(scope)
def isInterface(self):
return True
def isExternal(self):
return False
def setCallback(self, value):
self._callback = value
def isCallback(self):
return self._callback
def inheritanceDepth(self):
depth = 0
parent = self.parent
while parent:
depth = depth + 1
parent = parent.parent
return depth
def hasConstants(self):
return any(m.isConst() for m in self.members)
def hasInterfaceObject(self):
if self.isCallback():
return self.hasConstants()
return not hasattr(self, "_noInterfaceObject")
def hasInterfacePrototypeObject(self):
return not self.isCallback()
def addExtendedAttributes(self, attrs):
self._extendedAttrDict = {}
for attr in attrs:
attrlist = list(attr)
identifier = attrlist.pop(0)
# Special cased attrs
if identifier == "TreatNonCallableAsNull":
raise WebIDLError("TreatNonCallableAsNull cannot be specified on interfaces",
self.location)
elif identifier == "NoInterfaceObject":
if self.ctor():
raise WebIDLError("Constructor and NoInterfaceObject are incompatible",
self.location)
self._noInterfaceObject = True
elif identifier == "Constructor":
if not self.hasInterfaceObject():
raise WebIDLError("Constructor and NoInterfaceObject are incompatible",
self.location)
args = attrlist[0] if len(attrlist) else []
retType = IDLWrapperType(self.location, self)
identifier = IDLUnresolvedIdentifier(self.location, "constructor",
allowForbidden=True)
method = IDLMethod(self.location, identifier, retType, args)
method.resolve(self)
self._extendedAttrDict[identifier] = attrlist if len(attrlist) else True
class IDLEnum(IDLObjectWithIdentifier):
def __init__(self, location, parentScope, name, values):
assert isinstance(parentScope, IDLScope)
assert isinstance(name, IDLUnresolvedIdentifier)
if len(values) != len(set(values)):
raise WebIDLError("Enum %s has multiple identical strings" % name.name, location)
IDLObjectWithIdentifier.__init__(self, location, parentScope, name)
self._values = values
def values(self):
return self._values
def finish(self, scope):
pass
def isEnum(self):
return True
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
class IDLType(IDLObject):
Tags = enum(
# The integer types
'int8',
'uint8',
'int16',
'uint16',
'int32',
'uint32',
'int64',
'uint64',
# Additional primitive types
'bool',
'float',
'double',
# Other types
'any',
'domstring',
'object',
'date',
'void',
# Funny stuff
'interface',
'dictionary',
'enum',
'callback'
)
def __init__(self, location, name):
IDLObject.__init__(self, location)
self.name = name
self.builtin = False
def __eq__(self, other):
return other and self.name == other.name and self.builtin == other.builtin
def __str__(self):
return str(self.name)
def isType(self):
return True
def nullable(self):
return False
def isPrimitive(self):
return False
def isString(self):
return False
def isVoid(self):
return self.name == "Void"
def isSequence(self):
return False
def isArray(self):
return False
def isArrayBuffer(self):
return False
def isDictionary(self):
return False
def isInterface(self):
return False
def isAny(self):
return self.tag() == IDLType.Tags.any
def isDate(self):
return self.tag() == IDLType.Tags.date
def isObject(self):
return self.tag() == IDLType.Tags.object
def isComplete(self):
return True
def tag(self):
assert False # Override me!
def treatNonCallableAsNull(self):
if not (self.nullable() and self.tag() == IDLType.Tags.callback):
raise WebIDLError("Type %s cannot be TreatNonCallableAsNull" % self,
self.location)
return hasattr(self, "_treatNonCallableAsNull")
def markTreatNonCallableAsNull(self):
assert not self.treatNonCallableAsNull()
self._treatNonCallableAsNull = True
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
def resolveType(self, parentScope):
pass
def unroll(self):
return self
def isDistinguishableFrom(self, other):
raise TypeError("Can't tell whether a generic type is or is not "
"distinguishable from other things")
class IDLUnresolvedType(IDLType):
"""
Unresolved types are interface types
"""
def __init__(self, location, name):
IDLType.__init__(self, location, name)
def isComplete(self):
return False
def complete(self, scope):
obj = None
try:
obj = scope._lookupIdentifier(self.name)
except:
raise WebIDLError("Unresolved type '%s'." % self.name, self.location)
assert obj
if obj.isType():
return obj
name = self.name.resolve(scope, None)
return IDLWrapperType(self.location, obj)
def isDistinguishableFrom(self, other):
raise TypeError("Can't tell whether an unresolved type is or is not "
"distinguishable from other things")
class IDLNullableType(IDLType):
def __init__(self, location, innerType):
assert not innerType.isVoid()
assert not innerType.nullable()
assert not innerType == BuiltinTypes[IDLBuiltinType.Types.any]
IDLType.__init__(self, location, innerType.name)
self.inner = innerType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLNullableType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "OrNull"
def nullable(self):
return True
def isCallback(self):
return self.inner.isCallback()
def isPrimitive(self):
return self.inner.isPrimitive()
def isString(self):
return self.inner.isString()
def isFloat(self):
return self.inner.isFloat()
def isInteger(self):
return self.inner.isInteger()
def isVoid(self):
return False
def isSequence(self):
return self.inner.isSequence()
def isArray(self):
return self.inner.isArray()
def isArrayBuffer(self):
return self.inner.isArrayBuffer()
def isDictionary(self):
return self.inner.isDictionary()
def isInterface(self):
return self.inner.isInterface()
def isEnum(self):
return self.inner.isEnum()
def tag(self):
return self.inner.tag()
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
self.name = self.inner.name
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
if other.nullable():
# Can't tell which type null should become
return False
return self.inner.isDistinguishableFrom(other)
class IDLSequenceType(IDLType):
def __init__(self, location, parameterType):
assert not parameterType.isVoid()
IDLType.__init__(self, location, parameterType.name)
self.inner = parameterType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLSequenceType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "Sequence"
def nullable(self):
return False
def isPrimitive(self):
return False;
def isString(self):
return False;
def isVoid(self):
return False
def isSequence(self):
return True
def isArray(self):
return False
def isDictionary(self):
return False
def isInterface(self):
return False
def isEnum(self):
return False
def tag(self):
# XXXkhuey this is probably wrong.
return self.inner.tag()
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
self.name = self.inner.name
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isDictionary() or other.isDate() or
(other.isInterface() and not other.isCallback()))
class IDLArrayType(IDLType):
def __init__(self, location, parameterType):
assert not parameterType.isVoid()
if parameterType.isSequence():
raise WebIDLError("Array type cannot parameterize over a sequence type",
location)
if parameterType.isDictionary():
raise WebIDLError("Array type cannot parameterize over a dictionary type",
location)
IDLType.__init__(self, location, parameterType.name)
self.inner = parameterType
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLArrayType) and self.inner == other.inner
def __str__(self):
return self.inner.__str__() + "Array"
def nullable(self):
return False
def isPrimitive(self):
return False
def isString(self):
return False
def isVoid(self):
return False
def isSequence(self):
assert not self.inner.isSequence()
return False
def isArray(self):
return True
def isDictionary(self):
assert not self.inner.isDictionary()
return False
def isInterface(self):
return False
def isEnum(self):
return False
def tag(self):
# XXXkhuey this is probably wrong.
return self.inner.tag()
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolveType(parentScope)
def isComplete(self):
return self.inner.isComplete()
def complete(self, scope):
self.inner = self.inner.complete(scope)
self.name = self.inner.name
return self
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isDictionary() or other.isDate() or
(other.isInterface() and not other.isCallback()))
class IDLTypedefType(IDLType, IDLObjectWithIdentifier):
def __init__(self, location, innerType, name):
IDLType.__init__(self, location, innerType.name)
identifier = IDLUnresolvedIdentifier(location, name)
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
self.inner = innerType
self.name = name
self.builtin = False
def __eq__(self, other):
return isinstance(other, IDLTypedefType) and self.inner == other.inner
def __str__(self):
return self.identifier.name
def nullable(self):
return self.inner.nullable()
def isPrimitive(self):
return self.inner.isPrimitive()
def isString(self):
return self.inner.isString()
def isVoid(self):
return self.inner.isVoid()
def isSequence(self):
return self.inner.isSequence()
def isArray(self):
return self.inner.isArray()
def isDictionary(self):
return self.inner.isDictionary()
def isInterface(self):
return self.inner.isInterface()
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
IDLObjectWithIdentifier.resolve(self, parentScope)
def tag(self):
return self.inner.tag()
def unroll(self):
return self.inner.unroll()
def isDistinguishableFrom(self, other):
return self.inner.isDistinguishableFrom(other)
class IDLWrapperType(IDLType):
def __init__(self, location, inner):
IDLType.__init__(self, location, inner.identifier.name)
self.inner = inner
self.name = inner.identifier
self.builtin = False
def __eq__(self, other):
return other and self.name == other.name and self.builtin == other.builtin
def __str__(self):
return str(self.name.name) + " (Wrapper)"
def nullable(self):
return False
def isPrimitive(self):
return False
def isString(self):
return False
def isVoid(self):
return False
def isSequence(self):
return False
def isArray(self):
return False
def isDictionary(self):
return False
def isInterface(self):
return isinstance(self.inner, IDLInterface) or \
isinstance(self.inner, IDLExternalInterface)
def isEnum(self):
return isinstance(self.inner, IDLEnum)
def resolveType(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.inner.resolve(parentScope)
def isComplete(self):
return True
def tag(self):
if self.isInterface():
return IDLType.Tags.interface
elif self.isEnum():
return IDLType.Tags.enum
else:
assert False
def isDistinguishableFrom(self, other):
assert self.isInterface() or self.isEnum()
if self.isEnum():
return (other.isInterface() or other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if other.isPrimitive() or other.isString() or other.isEnum():
return True
# XXXbz need to check that the interfaces can't be implemented
# by the same object
if other.isInterface():
return (self != other and
(not self.isCallback() or not other.isCallback()))
if other.isDictionary() or other.isCallback():
return not self.isCallback()
if other.isSequence() or other.isArray():
return not self.isCallback()
class IDLBuiltinType(IDLType):
Types = enum(
# The integer types
'byte',
'octet',
'short',
'unsigned_short',
'long',
'unsigned_long',
'long_long',
'unsigned_long_long',
# Additional primitive types
'boolean',
'float',
'double',
# Other types
'any',
'domstring',
'object',
'date',
'void',
# Funny stuff
'ArrayBuffer'
)
TagLookup = {
Types.byte: IDLType.Tags.int8,
Types.octet: IDLType.Tags.uint8,
Types.short: IDLType.Tags.int16,
Types.unsigned_short: IDLType.Tags.uint16,
Types.long: IDLType.Tags.int32,
Types.unsigned_long: IDLType.Tags.uint32,
Types.long_long: IDLType.Tags.int64,
Types.unsigned_long_long: IDLType.Tags.uint64,
Types.boolean: IDLType.Tags.bool,
Types.float: IDLType.Tags.float,
Types.double: IDLType.Tags.double,
Types.any: IDLType.Tags.any,
Types.domstring: IDLType.Tags.domstring,
Types.object: IDLType.Tags.object,
Types.date: IDLType.Tags.date,
Types.void: IDLType.Tags.void,
Types.ArrayBuffer: IDLType.Tags.interface
}
def __init__(self, location, name, type):
IDLType.__init__(self, location, name)
self.builtin = True
self._typeTag = type
def isPrimitive(self):
return self._typeTag <= IDLBuiltinType.Types.double
def isString(self):
return self._typeTag == IDLBuiltinType.Types.domstring
def isInteger(self):
return self._typeTag <= IDLBuiltinType.Types.unsigned_long_long
def isArrayBuffer(self):
return self._typeTag == IDLBuiltinType.Types.ArrayBuffer
def isInterface(self):
# ArrayBuffers are interface types per the TypedArray spec,
# but we handle them as builtins because SpiderMonkey implements
# ArrayBuffers.
return self._typeTag == IDLBuiltinType.Types.ArrayBuffer
def isFloat(self):
return self._typeTag == IDLBuiltinType.Types.float or \
self._typeTag == IDLBuiltinType.Types.double
def tag(self):
return IDLBuiltinType.TagLookup[self._typeTag]
def isDistinguishableFrom(self, other):
if self.isPrimitive() or self.isString():
return (other.isInterface() or other.isObject() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or
other.isDate())
if self.isAny():
# Can't tell "any" apart from anything
return False
if self.isObject():
return other.isPrimitive() or other.isString() or other.isEnum()
if self.isDate():
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isInterface() or other.isCallback() or
other.isDictionary() or other.isSequence() or
other.isArray())
if self.isVoid():
return not other.isVoid()
# Not much else we could be!
assert self.isArrayBuffer()
# Like interfaces, but we know we're not a callback
return (other.isPrimitive() or other.isString() or other.isEnum() or
other.isCallback() or other.isDictionary() or
other.isSequence() or other.isArray() or other.isDate() or
(other.isInterface() and not other.isArrayBuffer()))
BuiltinTypes = {
IDLBuiltinType.Types.byte:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Byte",
IDLBuiltinType.Types.byte),
IDLBuiltinType.Types.octet:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Octet",
IDLBuiltinType.Types.octet),
IDLBuiltinType.Types.short:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Short",
IDLBuiltinType.Types.short),
IDLBuiltinType.Types.unsigned_short:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedShort",
IDLBuiltinType.Types.unsigned_short),
IDLBuiltinType.Types.long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Long",
IDLBuiltinType.Types.long),
IDLBuiltinType.Types.unsigned_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedLong",
IDLBuiltinType.Types.unsigned_long),
IDLBuiltinType.Types.long_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "LongLong",
IDLBuiltinType.Types.long_long),
IDLBuiltinType.Types.unsigned_long_long:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "UnsignedLongLong",
IDLBuiltinType.Types.unsigned_long_long),
IDLBuiltinType.Types.boolean:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Boolean",
IDLBuiltinType.Types.boolean),
IDLBuiltinType.Types.float:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Float",
IDLBuiltinType.Types.float),
IDLBuiltinType.Types.double:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Double",
IDLBuiltinType.Types.double),
IDLBuiltinType.Types.any:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Any",
IDLBuiltinType.Types.any),
IDLBuiltinType.Types.domstring:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "String",
IDLBuiltinType.Types.domstring),
IDLBuiltinType.Types.object:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Object",
IDLBuiltinType.Types.object),
IDLBuiltinType.Types.date:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Date",
IDLBuiltinType.Types.date),
IDLBuiltinType.Types.void:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "Void",
IDLBuiltinType.Types.void),
IDLBuiltinType.Types.ArrayBuffer:
IDLBuiltinType(BuiltinLocation("<builtin type>"), "ArrayBuffer",
IDLBuiltinType.Types.ArrayBuffer)
}
integerTypeSizes = {
IDLBuiltinType.Types.byte: (-128, 127),
IDLBuiltinType.Types.octet: (0, 255),
IDLBuiltinType.Types.short: (-32768, 32767),
IDLBuiltinType.Types.unsigned_short: (0, 65535),
IDLBuiltinType.Types.long: (-2147483648, 2147483647),
IDLBuiltinType.Types.unsigned_long: (0, 4294967295),
IDLBuiltinType.Types.long_long: (-9223372036854775808,
9223372036854775807),
IDLBuiltinType.Types.unsigned_long_long: (0, 18446744073709551615)
}
def matchIntegerValueToType(value):
for type, extremes in integerTypeSizes.items():
(min, max) = extremes
if value <= max and value >= min:
return BuiltinTypes[type]
return None
def checkDistinguishability(argset1, argset2):
assert isinstance(argset1, list) and isinstance(argset2, list)
class IDLValue(IDLObject):
def __init__(self, location, type, value):
IDLObject.__init__(self, location)
self.type = type
assert isinstance(type, IDLType)
self.value = value
def coerceToType(self, type, location):
if type == self.type:
return self # Nothing to do
# If the type allows null, rerun this matching on the inner type
if type.nullable():
innerValue = self.coerceToType(type.inner, location)
return IDLValue(self.location, type, innerValue.value)
# Else, see if we can coerce to 'type'.
if self.type.isInteger():
if not self.type.isInteger():
raise WebIDLError("Cannot coerce type %s to type %s." %
(self.type, type), location)
# We're both integer types. See if we fit.
(min, max) = integerTypeSizes[type._typeTag]
if self.value <= max and self.value >= min:
# Promote
return IDLValue(self.location, type, self.value)
else:
raise WebIDLError("Value %s is out of range for type %s." %
(self.value, type), location)
else:
pass
assert False # Not implemented!
class IDLNullValue(IDLObject):
def __init__(self, location):
IDLObject.__init__(self, location)
self.type = None
self.value = None
def coerceToType(self, type, location):
if not isinstance(type, IDLNullableType):
raise WebIDLError("Cannot coerce null value to type %s." % type,
location)
nullValue = IDLNullValue(self.location)
nullValue.type = type
return nullValue
class IDLInterfaceMember(IDLObjectWithIdentifier):
Tags = enum(
'Const',
'Attr',
'Method'
)
def __init__(self, location, identifier, tag):
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
self.tag = tag
def isMethod(self):
return self.tag == IDLInterfaceMember.Tags.Method
def isAttr(self):
return self.tag == IDLInterfaceMember.Tags.Attr
def isConst(self):
return self.tag == IDLInterfaceMember.Tags.Const
def addExtendedAttributes(self, attrs):
self._extendedAttrDict = {}
for attr in attrs:
attrlist = list(attr)
identifier = attrlist.pop(0)
self.handleExtendedAttribute(identifier, attrlist)
self._extendedAttrDict[identifier] = attrlist if len(attrlist) else True
def handleExtendedAttribute(self, name, list):
pass
def getExtendedAttribute(self, name):
return self._extendedAttrDict.get(name, None)
class IDLConst(IDLInterfaceMember):
def __init__(self, location, identifier, type, value):
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Const)
assert isinstance(type, IDLType)
self.type = type
# The value might not match the type
coercedValue = value.coerceToType(self.type, location)
assert coercedValue
self.value = coercedValue
def __str__(self):
return "'%s' const '%s'" % (self.type, self.identifier)
def finish(self, scope):
assert self.type.isComplete()
class IDLAttribute(IDLInterfaceMember):
def __init__(self, location, identifier, type, readonly, inherit):
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Attr)
assert isinstance(type, IDLType)
self.type = type
self.readonly = readonly
self.inherit = inherit
if readonly and inherit:
raise WebIDLError("An attribute cannot be both 'readonly' and 'inherit'",
self.location)
def __str__(self):
return "'%s' attribute '%s'" % (self.type, self.identifier)
def finish(self, scope):
if not self.type.isComplete():
t = self.type.complete(scope)
assert not isinstance(t, IDLUnresolvedType)
assert not isinstance(t.name, IDLUnresolvedIdentifier)
self.type = t
def handleExtendedAttribute(self, name, list):
if name == "TreatNonCallableAsNull":
self.type.markTreatNonCallableAsNull();
IDLInterfaceMember.handleExtendedAttribute(self, name, list)
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
self.type.resolveType(parentScope)
IDLObjectWithIdentifier.resolve(self, parentScope)
class IDLArgument(IDLObjectWithIdentifier):
def __init__(self, location, identifier, type, optional=False, defaultValue=None, variadic=False):
IDLObjectWithIdentifier.__init__(self, location, None, identifier)
assert isinstance(type, IDLType)
self.type = type
if defaultValue:
defaultValue = defaultValue.coerceToType(type, location)
assert defaultValue
self.optional = optional
self.defaultValue = defaultValue
self.variadic = variadic
assert not variadic or optional
def addExtendedAttributes(self, attrs):
assert len(attrs) == 0
class IDLCallbackType(IDLType, IDLObjectWithScope):
def __init__(self, location, parentScope, identifier, returnType, arguments):
assert isinstance(returnType, IDLType)
IDLType.__init__(self, location, identifier.name)
self._returnType = returnType
# Clone the list
self._arguments = list(arguments)
IDLObjectWithScope.__init__(self, location, parentScope, identifier)
for (returnType, arguments) in self.signatures():
for argument in arguments:
argument.resolve(self)
def isCallback(self):
return True
def signatures(self):
return [(self._returnType, self._arguments)]
def tag(self):
return IDLType.Tags.callback
def finish(self, scope):
if not self._returnType.isComplete():
type = returnType.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
self._returnType = type
for argument in self._arguments:
if argument.type.isComplete():
continue
type = argument.type.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
argument.type = type
def isDistinguishableFrom(self, other):
return (other.isPrimitive() or other.isString() or other.isEnum() or
(other.isInterface() and not other.isCallback()) or
other.isDate())
class IDLMethod(IDLInterfaceMember, IDLScope):
Special = enum(
'None',
'Getter',
'Setter',
'Creator',
'Deleter',
'LegacyCaller',
'Stringifier',
'Static'
)
TypeSuffixModifier = enum(
'None',
'QMark',
'Brackets'
)
NamedOrIndexed = enum(
'Neither',
'Named',
'Indexed'
)
def __init__(self, location, identifier, returnType, arguments,
static=False, getter=False, setter=False, creator=False,
deleter=False, specialType=NamedOrIndexed.Neither,
legacycaller=False, stringifier=False):
# REVIEW: specialType is NamedOrIndexed -- wow, this is messed up.
IDLInterfaceMember.__init__(self, location, identifier,
IDLInterfaceMember.Tags.Method)
self._hasOverloads = False
assert isinstance(returnType, IDLType)
self._returnType = [returnType]
assert isinstance(static, bool)
self._static = static
assert isinstance(getter, bool)
self._getter = getter
assert isinstance(setter, bool)
self._setter = setter
assert isinstance(creator, bool)
self._creator = creator
assert isinstance(deleter, bool)
self._deleter = deleter
assert isinstance(legacycaller, bool)
self._legacycaller = legacycaller
assert isinstance(stringifier, bool)
self._stringifier = stringifier
self._specialType = specialType
# Clone the list
self._arguments = [list(arguments)]
self.assertSignatureConstraints()
def __str__(self):
return "Method '%s'" % self.identifier
def assertSignatureConstraints(self):
if self._getter or self._deleter:
assert len(self._arguments) == 1
assert self._arguments[0][0].type == BuiltinTypes[IDLBuiltinType.Types.domstring] or \
self._arguments[0][0].type == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]
assert not self._arguments[0][0].optional and not self._arguments[0][0].variadic
assert not self._returnType[0].isVoid()
if self._setter or self._creator:
assert len(self._arguments[0]) == 2
assert self._arguments[0][0].type == BuiltinTypes[IDLBuiltinType.Types.domstring] or \
self._arguments[0][0].type == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]
assert not self._arguments[0][0].optional and not self._arguments[0][0].variadic
assert not self._arguments[0][1].optional and not self._arguments[0][1].variadic
assert self._arguments[0][1].type == self._returnType[0]
if self._stringifier:
assert len(self._arguments[0]) == 0
assert self._returnType[0] == BuiltinTypes[IDLBuiltinType.Types.domstring]
inOptionalArguments = False
sawVariadicArgument = False
assert len(self._arguments) == 1
arguments = self._arguments[0]
for argument in arguments:
# Only the last argument can be variadic
assert not sawVariadicArgument
# Once we see an optional argument, there can't be any non-optional
# arguments.
if inOptionalArguments:
assert argument.optional
inOptionalArguments = argument.optional
sawVariadicArgument = argument.variadic
def isStatic(self):
return self._static
def isGetter(self):
return self._getter
def isSetter(self):
return self._setter
def isCreator(self):
return self._creator
def isDeleter(self):
return self._deleter
def isNamed(self):
assert self._specialType == IDLMethod.NamedOrIndexed.Named or \
self._specialType == IDLMethod.NamedOrIndexed.Indexed
return self._specialType == IDLMethod.NamedOrIndexed.Named
def isIndexed(self):
assert self._specialType == IDLMethod.NamedOrIndexed.Named or \
self._specialType == IDLMethod.NamedOrIndexed.Indexed
return self._specialType == IDLMethod.NamedOrIndexed.Indexed
def isLegacycaller(self):
return self._legacycaller
def isStringifier(self):
return self._stringifier
def hasOverloads(self):
return self._hasOverloads
def resolve(self, parentScope):
assert isinstance(parentScope, IDLScope)
IDLObjectWithIdentifier.resolve(self, parentScope)
IDLScope.__init__(self, self.location, parentScope, self.identifier)
for (returnType, arguments) in self.signatures():
for argument in arguments:
argument.resolve(self)
def addOverload(self, method):
checkDistinguishability(self._arguments, method._arguments)
assert len(method._returnType) == 1
assert len(method._arguments) == 1
self._returnType.extend(method._returnType)
self._arguments.extend(method._arguments)
self._hasOverloads = True
if self.isStatic() != method.isStatic():
raise WebIDLError("Overloaded identifier %s appears with different values of the 'static' attribute" % method1.identifier,
method.location)
if self.isLegacycaller() != method.isLegacycaller():
raise WebIDLError("Overloaded identifier %s appears with different values of the 'legacycaller' attribute" % method1.identifier,
method.location)
# Can't overload special things!
assert not self.isGetter()
assert not method.isGetter()
assert not self.isSetter()
assert not method.isSetter()
assert not self.isCreator()
assert not method.isCreator()
assert not self.isDeleter()
assert not method.isDeleter()
assert not self.isStringifier()
assert not method.isStringifier()
return self
def signatures(self):
assert len(self._returnType) == len(self._arguments)
return zip(self._returnType, self._arguments)
def finish(self, scope):
for index, returnType in enumerate(self._returnType):
if returnType.isComplete():
continue
type = returnType.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
self._returnType[index] = type
for arguments in self._arguments:
for argument in arguments:
if argument.type.isComplete():
continue
type = argument.type.complete(scope)
assert not isinstance(type, IDLUnresolvedType)
assert not isinstance(type.name, IDLUnresolvedIdentifier)
argument.type = type
# Parser
class Tokenizer(object):
tokens = [
"INTEGER",
"FLOATLITERAL",
"IDENTIFIER",
"STRING",
"WHITESPACE",
"OTHER"
]
def t_INTEGER(self, t):
r'-?(0([0-7]+|[Xx][0-9A-Fa-f]+)?|[1-9][0-9]*)'
try:
# Can't use int(), because that doesn't handle octal properly.
t.value = parseInt(t.value)
except:
raise WebIDLError("Invalid integer literal",
Location(lexer=self.lexer,
lineno=self.lexer.lineno,
lexpos=self.lexer.lexpos,
filename=self._filename))
return t
def t_FLOATLITERAL(self, t):
r'-?(([0-9]+\.[0-9]*|[0-9]*\.[0-9]+)([Ee][+-]?[0-9]+)?|[0-9]+[Ee][+-]?[0-9]+)'
assert False
return t
def t_IDENTIFIER(self, t):
r'[A-Z_a-z][0-9A-Z_a-z]*'
t.type = self.keywords.get(t.value, 'IDENTIFIER')
return t
def t_STRING(self, t):
r'"[^"]*"'
t.value = t.value[1:-1]
return t
def t_WHITESPACE(self, t):
r'[\t\n\r ]+|[\t\n\r ]*((//[^\n]*|/\*.*?\*/)[\t\n\r ]*)+'
pass
def t_ELLIPSIS(self, t):
r'\.\.\.'
t.type = self.keywords.get(t.value)
return t
def t_OTHER(self, t):
r'[^\t\n\r 0-9A-Z_a-z]'
t.type = self.keywords.get(t.value, 'OTHER')
return t
keywords = {
"module": "MODULE",
"interface": "INTERFACE",
"partial": "PARTIAL",
"dictionary": "DICTIONARY",
"exception": "EXCEPTION",
"enum": "ENUM",
"callback": "CALLBACK",
"typedef": "TYPEDEF",
"implements": "IMPLEMENTS",
"const": "CONST",
"null": "NULL",
"true": "TRUE",
"false": "FALSE",
"stringifier": "STRINGIFIER",
"attribute": "ATTRIBUTE",
"readonly": "READONLY",
"inherit": "INHERIT",
"static": "STATIC",
"getter": "GETTER",
"setter": "SETTER",
"creator": "CREATOR",
"deleter": "DELETER",
"legacycaller": "LEGACYCALLER",
"optional": "OPTIONAL",
"...": "ELLIPSIS",
"::": "SCOPE",
"Date": "DATE",
"DOMString": "DOMSTRING",
"any": "ANY",
"boolean": "BOOLEAN",
"byte": "BYTE",
"double": "DOUBLE",
"float": "FLOAT",
"long": "LONG",
"object": "OBJECT",
"octet": "OCTET",
"optional": "OPTIONAL",
"sequence": "SEQUENCE",
"short": "SHORT",
"unsigned": "UNSIGNED",
"void": "VOID",
":": "COLON",
";": "SEMICOLON",
"{": "LBRACE",
"}": "RBRACE",
"(": "LPAREN",
")": "RPAREN",
"[": "LBRACKET",
"]": "RBRACKET",
"?": "QUESTIONMARK",
",": "COMMA",
"=": "EQUALS",
"<": "LT",
">": "GT",
"ArrayBuffer": "ARRAYBUFFER"
}
tokens.extend(keywords.values())
def t_error(self, t):
raise WebIDLError("Unrecognized Input",
Location(lexer=self.lexer,
lineno=self.lexer.lineno,
lexpos=self.lexer.lexpos,
filename = self.filename))
def __init__(self, outputdir):
self.lexer = lex.lex(object=self,
outputdir=outputdir,
lextab='webidllex',
reflags=re.DOTALL)
class Parser(Tokenizer):
def getLocation(self, p, i):
return Location(self.lexer, p.lineno(i), p.lexpos(i), self._filename)
def globalScope(self):
return self._globalScope
# The p_Foo functions here must match the WebIDL spec's grammar.
# It's acceptable to split things at '|' boundaries.
def p_Definitions(self, p):
"""
Definitions : ExtendedAttributeList Definition Definitions
"""
if p[2]:
p[0] = [p[2]]
p[2].addExtendedAttributes(p[1])
else:
assert not p[1]
p[0] = []
p[0].extend(p[3])
def p_DefinitionsEmpty(self, p):
"""
Definitions :
"""
p[0] = []
def p_Definition(self, p):
"""
Definition : CallbackOrInterface
| PartialInterface
| Dictionary
| Exception
| Enum
| Typedef
| ImplementsStatement
"""
p[0] = p[1]
assert p[1] # We might not have implemented something ...
def p_CallbackOrInterfaceCallback(self, p):
"""
CallbackOrInterface : CALLBACK CallbackRestOrInterface
"""
if p[2].isInterface():
assert isinstance(p[2], IDLInterface)
p[2].setCallback(True)
p[0] = p[2]
def p_CallbackOrInterfaceInterface(self, p):
"""
CallbackOrInterface : Interface
"""
p[0] = p[1]
def p_CallbackRestOrInterface(self, p):
"""
CallbackRestOrInterface : CallbackRest
| Interface
"""
assert p[1]
p[0] = p[1]
def p_Interface(self, p):
"""
Interface : INTERFACE IDENTIFIER Inheritance LBRACE InterfaceMembers RBRACE SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
members = p[5]
p[0] = IDLInterface(location, self.globalScope(), identifier, p[3], members)
def p_InterfaceForwardDecl(self, p):
"""
Interface : INTERFACE IDENTIFIER SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
try:
if self.globalScope()._lookupIdentifier(identifier):
p[0] = self.globalScope()._lookupIdentifier(identifier)
return
except:
pass
p[0] = IDLExternalInterface(location, self.globalScope(), identifier)
def p_PartialInterface(self, p):
"""
PartialInterface : PARTIAL INTERFACE IDENTIFIER LBRACE InterfaceMembers RBRACE SEMICOLON
"""
pass
def p_Inheritance(self, p):
"""
Inheritance : COLON ScopedName
"""
p[0] = IDLParentPlaceholder(self.getLocation(p, 2), p[2])
def p_InheritanceEmpty(self, p):
"""
Inheritance :
"""
pass
def p_InterfaceMembers(self, p):
"""
InterfaceMembers : ExtendedAttributeList InterfaceMember InterfaceMembers
"""
p[0] = [p[2]] if p[2] else []
assert not p[1] or p[2]
p[2].addExtendedAttributes(p[1])
p[0].extend(p[3])
def p_InterfaceMembersEmpty(self, p):
"""
InterfaceMembers :
"""
p[0] = []
def p_InterfaceMember(self, p):
"""
InterfaceMember : Const
| AttributeOrOperation
"""
p[0] = p[1]
def p_Dictionary(self, p):
"""
Dictionary : DICTIONARY IDENTIFIER Inheritance LBRACE DictionaryMembers RBRACE SEMICOLON
"""
pass
def p_DictionaryMembers(self, p):
"""
DictionaryMembers : ExtendedAttributeList DictionaryMember DictionaryMembers
|
"""
pass
def p_DictionaryMember(self, p):
"""
DictionaryMember : Type IDENTIFIER DefaultValue SEMICOLON
"""
pass
def p_DefaultValue(self, p):
"""
DefaultValue : EQUALS ConstValue
|
"""
if len(p) > 1:
p[0] = p[2]
else:
p[0] = None
def p_Exception(self, p):
"""
Exception : EXCEPTION IDENTIFIER Inheritance LBRACE ExceptionMembers RBRACE SEMICOLON
"""
pass
def p_Enum(self, p):
"""
Enum : ENUM IDENTIFIER LBRACE EnumValueList RBRACE SEMICOLON
"""
location = self.getLocation(p, 1)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 2), p[2])
values = p[4]
assert values
p[0] = IDLEnum(location, self.globalScope(), identifier, values)
def p_EnumValueList(self, p):
"""
EnumValueList : STRING EnumValues
"""
p[0] = [p[1]]
p[0].extend(p[2])
def p_EnumValues(self, p):
"""
EnumValues : COMMA STRING EnumValues
"""
p[0] = [p[2]]
p[0].extend(p[3])
def p_EnumValuesEmpty(self, p):
"""
EnumValues :
"""
p[0] = []
def p_CallbackRest(self, p):
"""
CallbackRest : IDENTIFIER EQUALS ReturnType LPAREN ArgumentList RPAREN SEMICOLON
"""
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
p[0] = IDLCallbackType(self.getLocation(p, 1), self.globalScope(),
identifier, p[3], p[5])
def p_ExceptionMembers(self, p):
"""
ExceptionMembers : ExtendedAttributeList ExceptionMember ExceptionMembers
|
"""
pass
def p_Typedef(self, p):
"""
Typedef : TYPEDEF Type IDENTIFIER SEMICOLON
"""
typedef = IDLTypedefType(self.getLocation(p, 1), p[2], p[3])
typedef.resolve(self.globalScope())
p[0] = typedef
def p_ImplementsStatement(self, p):
"""
ImplementsStatement : ScopedName IMPLEMENTS ScopedName SEMICOLON
"""
pass
def p_Const(self, p):
"""
Const : CONST ConstType IDENTIFIER EQUALS ConstValue SEMICOLON
"""
location = self.getLocation(p, 1)
type = p[2]
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 3), p[3])
value = p[5]
p[0] = IDLConst(location, identifier, type, value)
def p_ConstValueBoolean(self, p):
"""
ConstValue : BooleanLiteral
"""
location = self.getLocation(p, 1)
booleanType = BuiltinTypes[IDLBuiltinType.Types.boolean]
p[0] = IDLValue(location, booleanType, p[1])
def p_ConstValueInteger(self, p):
"""
ConstValue : INTEGER
"""
location = self.getLocation(p, 1)
# We don't know ahead of time what type the integer literal is.
# Determine the smallest type it could possibly fit in and use that.
integerType = matchIntegerValueToType(p[1])
if integerType == None:
raise WebIDLError("Integer literal out of range", location)
p[0] = IDLValue(location, integerType, p[1])
def p_ConstValueFloat(self, p):
"""
ConstValue : FLOATLITERAL
"""
assert False
pass
def p_ConstValueString(self, p):
"""
ConstValue : STRING
"""
assert False
pass
def p_ConstValueNull(self, p):
"""
ConstValue : NULL
"""
p[0] = IDLNullValue(self.getLocation(p, 1))
def p_BooleanLiteralTrue(self, p):
"""
BooleanLiteral : TRUE
"""
p[0] = True
def p_BooleanLiteralFalse(self, p):
"""
BooleanLiteral : FALSE
"""
p[0] = False
def p_AttributeOrOperationStringifier(self, p):
"""
AttributeOrOperation : STRINGIFIER StringifierAttributeOrOperation
"""
assert False # Not implemented
pass
def p_AttributeOrOperation(self, p):
"""
AttributeOrOperation : Attribute
| Operation
"""
p[0] = p[1]
def p_StringifierAttributeOrOperation(self, p):
"""
StringifierAttributeOrOperation : Attribute
| OperationRest
| SEMICOLON
"""
pass
def p_Attribute(self, p):
"""
Attribute : Inherit ReadOnly ATTRIBUTE AttributeType IDENTIFIER SEMICOLON
"""
location = self.getLocation(p, 3)
inherit = p[1]
readonly = p[2]
t = p[4]
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 5), p[5])
p[0] = IDLAttribute(location, identifier, t, readonly, inherit)
def p_ReadOnly(self, p):
"""
ReadOnly : READONLY
"""
p[0] = True
def p_ReadOnlyEmpty(self, p):
"""
ReadOnly :
"""
p[0] = False
def p_Inherit(self, p):
"""
Inherit : INHERIT
"""
p[0] = True
def p_InheritEmpty(self, p):
"""
Inherit :
"""
p[0] = False
def p_Operation(self, p):
"""
Operation : Qualifiers OperationRest
"""
qualifiers = p[1]
# Disallow duplicates in the qualifier set
if not len(set(qualifiers)) == len(qualifiers):
raise WebIDLError("Duplicate qualifiers are not allowed",
self.getLocation(p, 1))
static = True if IDLMethod.Special.Static in p[1] else False
# If static is there that's all that's allowed. This is disallowed
# by the parser, so we can assert here.
assert not static or len(qualifiers) == 1
getter = True if IDLMethod.Special.Getter in p[1] else False
setter = True if IDLMethod.Special.Setter in p[1] else False
creator = True if IDLMethod.Special.Creator in p[1] else False
deleter = True if IDLMethod.Special.Deleter in p[1] else False
legacycaller = True if IDLMethod.Special.LegacyCaller in p[1] else False
if getter or deleter:
if setter or creator:
raise WebIDLError("getter and deleter are incompatible with setter and creator",
self.getLocation(p, 1))
(returnType, identifier, arguments) = p[2]
assert isinstance(returnType, IDLType)
specialType = IDLMethod.NamedOrIndexed.Neither
if getter or deleter:
if len(arguments) != 1:
raise WebIDLError("%s has wrong number of arguments" %
("getter" if getter else "deleter"),
self.getLocation(p, 2))
argType = arguments[0].type
if argType == BuiltinTypes[IDLBuiltinType.Types.domstring]:
specialType = IDLMethod.NamedOrIndexed.Named
elif argType == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]:
specialType = IDLMethod.NamedOrIndexed.Indexed
else:
raise WebIDLError("%s has wrong argument type (must be DOMString or UnsignedLong)" %
("getter" if getter else "deleter"),
arguments[0].location)
if arguments[0].optional or arguments[0].variadic:
raise WebIDLError("%s cannot have %s argument" %
("getter" if getter else "deleter",
"optional" if arguments[0].optional else "variadic"),
arguments[0].location)
if returnType.isVoid():
raise WebIDLError("%s cannot have void return type" %
("getter" if getter else "deleter"),
self.getLocation(p, 2))
if setter or creator:
if len(arguments) != 2:
raise WebIDLError("%s has wrong number of arguments" %
("setter" if setter else "creator"),
self.getLocation(p, 2))
argType = arguments[0].type
if argType == BuiltinTypes[IDLBuiltinType.Types.domstring]:
specialType = IDLMethod.NamedOrIndexed.Named
elif argType == BuiltinTypes[IDLBuiltinType.Types.unsigned_long]:
specialType = IDLMethod.NamedOrIndexed.Indexed
else:
raise WebIDLError("%s has wrong argument type (must be DOMString or UnsignedLong)" %
("setter" if setter else "creator"),
arguments[0].location)
if arguments[0].optional or arguments[0].variadic:
raise WebIDLError("%s cannot have %s argument" %
("setter" if setter else "creator",
"optional" if arguments[0].optional else "variadic"),
arguments[0].location)
if arguments[1].optional or arguments[1].variadic:
raise WebIDLError("%s cannot have %s argument" %
("setter" if setter else "creator",
"optional" if arguments[1].optional else "variadic"),
arguments[1].location)
if returnType.isVoid():
raise WebIDLError("%s cannot have void return type" %
("setter" if setter else "creator"),
self.getLocation(p, 2))
if not arguments[1].type == returnType:
raise WebIDLError("%s return type and second argument type must match" %
("setter" if setter else "creator"),
self.getLocation(p, 2))
inOptionalArguments = False
variadicArgument = False
for argument in arguments:
# Only the last argument can be variadic
if variadicArgument:
raise WebIDLError("Only the last argument can be variadic",
variadicArgument.location)
# Once we see an optional argument, there can't be any non-optional
# arguments.
if inOptionalArguments and not argument.optional:
raise WebIDLError("Cannot have a non-optional argument following an optional argument",
argument.location)
inOptionalArguments = argument.optional
variadicArgument = argument if argument.variadic else None
# identifier might be None. This is only permitted for special methods.
# NB: Stringifiers are handled elsewhere.
if not identifier:
if not getter and not setter and not creator and \
not deleter and not legacycaller:
raise WebIDLError("Identifier required for non-special methods",
self.getLocation(p, 2))
location = BuiltinLocation("<auto-generated-identifier>")
identifier = IDLUnresolvedIdentifier(location, "__%s%s%s%s%s%s" %
("named" if specialType == IDLMethod.NamedOrIndexed.Named else \
"indexed" if specialType == IDLMethod.NamedOrIndexed.Indexed else "",
"getter" if getter else "",
"setter" if setter else "",
"deleter" if deleter else "",
"creator" if creator else "",
"legacycaller" if legacycaller else ""), allowDoubleUnderscore=True)
method = IDLMethod(self.getLocation(p, 2), identifier, returnType, arguments,
static=static, getter=getter, setter=setter, creator=creator,
deleter=deleter, specialType=specialType,
legacycaller=legacycaller, stringifier=False)
p[0] = method
def p_QualifiersStatic(self, p):
"""
Qualifiers : STATIC
"""
p[0] = [IDLMethod.Special.Static]
def p_QualifiersSpecials(self, p):
"""
Qualifiers : Specials
"""
p[0] = p[1]
def p_Specials(self, p):
"""
Specials : Special Specials
"""
p[0] = [p[1]]
p[0].extend(p[2])
def p_SpecialsEmpty(self, p):
"""
Specials :
"""
p[0] = []
def p_SpecialGetter(self, p):
"""
Special : GETTER
"""
p[0] = IDLMethod.Special.Getter
def p_SpecialSetter(self, p):
"""
Special : SETTER
"""
p[0] = IDLMethod.Special.Setter
def p_SpecialCreator(self, p):
"""
Special : CREATOR
"""
p[0] = IDLMethod.Special.Creator
def p_SpecialDeleter(self, p):
"""
Special : DELETER
"""
p[0] = IDLMethod.Special.Deleter
def p_SpecialLegacyCaller(self, p):
"""
Special : LEGACYCALLER
"""
p[0] = IDLMethod.Special.LegacyCaller
def p_OperationRest(self, p):
"""
OperationRest : ReturnType OptionalIdentifier LPAREN ArgumentList RPAREN SEMICOLON
"""
p[0] = (p[1], p[2], p[4])
def p_OptionalIdentifier(self, p):
"""
OptionalIdentifier : IDENTIFIER
"""
p[0] = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
def p_OptionalIdentifierEmpty(self, p):
"""
OptionalIdentifier :
"""
pass
def p_ArgumentList(self, p):
"""
ArgumentList : Argument Arguments
"""
p[0] = [p[1]] if p[1] else []
p[0].extend(p[2])
def p_ArgumentListEmpty(self, p):
"""
ArgumentList :
"""
p[0] = []
def p_Arguments(self, p):
"""
Arguments : COMMA Argument Arguments
"""
p[0] = [p[2]] if p[2] else []
p[0].extend(p[3])
def p_ArgumentsEmpty(self, p):
"""
Arguments :
"""
p[0] = []
def p_Argument(self, p):
"""
Argument : ExtendedAttributeList Optional Type Ellipsis IDENTIFIER DefaultValue
"""
t = p[3]
assert isinstance(t, IDLType)
identifier = IDLUnresolvedIdentifier(self.getLocation(p, 5), p[5])
optional = p[2]
variadic = p[4]
defaultValue = p[6]
if not optional and defaultValue:
raise WebIDLError("Mandatory arguments can't have a default value.",
self.getLocation(p, 6))
if variadic:
if optional:
raise WebIDLError("Variadic arguments should not be marked optional.",
self.getLocation(p, 2))
optional = variadic
p[0] = IDLArgument(self.getLocation(p, 5), identifier, t, optional, defaultValue, variadic)
p[0].addExtendedAttributes(p[1])
def p_Optional(self, p):
"""
Optional : OPTIONAL
"""
p[0] = True
def p_OptionalEmpty(self, p):
"""
Optional :
"""
p[0] = False
def p_Ellipsis(self, p):
"""
Ellipsis : ELLIPSIS
"""
p[0] = True
def p_EllipsisEmpty(self, p):
"""
Ellipsis :
"""
p[0] = False
def p_ExceptionMember(self, p):
"""
ExceptionMember : Const
| ExceptionField
"""
pass
def p_ExceptionField(self, p):
"""
ExceptionField : AttributeType IDENTIFIER SEMICOLON
"""
pass
def p_ExtendedAttributeList(self, p):
"""
ExtendedAttributeList : LBRACKET ExtendedAttribute ExtendedAttributes RBRACKET
"""
p[0] = [p[2]]
if p[3]:
p[0].extend(p[3])
def p_ExtendedAttributeListEmpty(self, p):
"""
ExtendedAttributeList :
"""
p[0] = []
def p_ExtendedAttribute(self, p):
"""
ExtendedAttribute : ExtendedAttributeNoArgs
| ExtendedAttributeArgList
| ExtendedAttributeIdent
| ExtendedAttributeNamedArgList
"""
p[0] = p[1]
def p_ExtendedAttributeEmpty(self, p):
"""
ExtendedAttribute :
"""
pass
def p_ExtendedAttributes(self, p):
"""
ExtendedAttributes : COMMA ExtendedAttribute ExtendedAttributes
"""
p[0] = [p[2]] if p[2] else []
p[0].extend(p[3])
def p_ExtendedAttributesEmpty(self, p):
"""
ExtendedAttributes :
"""
p[0] = []
def p_Other(self, p):
"""
Other : INTEGER
| FLOATLITERAL
| IDENTIFIER
| STRING
| OTHER
| ELLIPSIS
| COLON
| SCOPE
| SEMICOLON
| LT
| EQUALS
| GT
| QUESTIONMARK
| DATE
| DOMSTRING
| ANY
| ATTRIBUTE
| BOOLEAN
| BYTE
| LEGACYCALLER
| CONST
| CREATOR
| DELETER
| DOUBLE
| EXCEPTION
| FALSE
| FLOAT
| GETTER
| IMPLEMENTS
| INHERIT
| INTERFACE
| LONG
| MODULE
| NULL
| OBJECT
| OCTET
| OPTIONAL
| SEQUENCE
| SETTER
| SHORT
| STATIC
| STRINGIFIER
| TRUE
| TYPEDEF
| UNSIGNED
| VOID
"""
pass
def p_OtherOrComma(self, p):
"""
OtherOrComma : Other
| COMMA
"""
pass
def p_TypeAttributeType(self, p):
"""
Type : AttributeType
"""
p[0] = p[1]
def p_TypeSequenceType(self, p):
"""
Type : SequenceType
"""
p[0] = p[1]
def p_SequenceType(self, p):
"""
SequenceType : SEQUENCE LT Type GT Null
"""
innerType = p[3]
type = IDLSequenceType(self.getLocation(p, 1), innerType)
if p[5]:
type = IDLNullableType(self.getLocation(p, 5), type)
p[0] = type
def p_AttributeTypePrimitive(self, p):
"""
AttributeType : PrimitiveOrStringType TypeSuffix
| ARRAYBUFFER TypeSuffix
| OBJECT TypeSuffix
| ANY TypeSuffixStartingWithArray
"""
if p[1] == "object":
type = BuiltinTypes[IDLBuiltinType.Types.object]
elif p[1] == "any":
type = BuiltinTypes[IDLBuiltinType.Types.any]
elif p[1] == "ArrayBuffer":
type = BuiltinTypes[IDLBuiltinType.Types.ArrayBuffer]
else:
type = BuiltinTypes[p[1]]
for (modifier, modifierLocation) in p[2]:
assert modifier == IDLMethod.TypeSuffixModifier.QMark or \
modifier == IDLMethod.TypeSuffixModifier.Brackets
if modifier == IDLMethod.TypeSuffixModifier.QMark:
type = IDLNullableType(modifierLocation, type)
elif modifier == IDLMethod.TypeSuffixModifier.Brackets:
type = IDLArrayType(modifierLocation, type)
p[0] = type
def p_AttributeTypeScopedName(self, p):
"""
AttributeType : ScopedName TypeSuffix
"""
assert isinstance(p[1], IDLUnresolvedIdentifier)
type = None
try:
if self.globalScope()._lookupIdentifier(p[1]):
obj = self.globalScope()._lookupIdentifier(p[1])
if obj.isType():
type = obj
else:
type = IDLWrapperType(self.getLocation(p, 1), p[1])
for (modifier, modifierLocation) in p[2]:
assert modifier == IDLMethod.TypeSuffixModifier.QMark or \
modifier == IDLMethod.TypeSuffixModifier.Brackets
if modifier == IDLMethod.TypeSuffixModifier.QMark:
type = IDLNullableType(modifierLocation, type)
elif modifier == IDLMethod.TypeSuffixModifier.Brackets:
type = IDLArrayType(modifierLocation, type)
p[0] = type
return
except:
pass
type = IDLUnresolvedType(self.getLocation(p, 1), p[1])
for (modifier, modifierLocation) in p[2]:
assert modifier == IDLMethod.TypeSuffixModifier.QMark or \
modifier == IDLMethod.TypeSuffixModifier.Brackets
if modifier == IDLMethod.TypeSuffixModifier.QMark:
type = IDLNullableType(modifierLocation, type)
elif modifier == IDLMethod.TypeSuffixModifier.Brackets:
type = IDLArrayType(modifierLocation, type)
p[0] = type
def p_AttributeTypeDate(self, p):
"""
AttributeType : DATE TypeSuffix
"""
assert False
pass
def p_ConstType(self, p):
"""
ConstType : PrimitiveOrStringType Null
"""
type = BuiltinTypes[p[1]]
if p[2]:
type = IDLNullableType(self.getLocation(p, 1), type)
p[0] = type
def p_PrimitiveOrStringTypeUint(self, p):
"""
PrimitiveOrStringType : UnsignedIntegerType
"""
p[0] = p[1]
def p_PrimitiveOrStringTypeBoolean(self, p):
"""
PrimitiveOrStringType : BOOLEAN
"""
p[0] = IDLBuiltinType.Types.boolean
def p_PrimitiveOrStringTypeByte(self, p):
"""
PrimitiveOrStringType : BYTE
"""
p[0] = IDLBuiltinType.Types.byte
def p_PrimitiveOrStringTypeOctet(self, p):
"""
PrimitiveOrStringType : OCTET
"""
p[0] = IDLBuiltinType.Types.octet
def p_PrimitiveOrStringTypeFloat(self, p):
"""
PrimitiveOrStringType : FLOAT
"""
p[0] = IDLBuiltinType.Types.float
def p_PrimitiveOrStringTypeDouble(self, p):
"""
PrimitiveOrStringType : DOUBLE
"""
p[0] = IDLBuiltinType.Types.double
def p_PrimitiveOrStringTypeDOMString(self, p):
"""
PrimitiveOrStringType : DOMSTRING
"""
p[0] = IDLBuiltinType.Types.domstring
def p_UnsignedIntegerTypeUnsigned(self, p):
"""
UnsignedIntegerType : UNSIGNED IntegerType
"""
p[0] = p[2] + 1 # Adding one to a given signed integer type
# gets you the unsigned type.
def p_UnsignedIntegerType(self, p):
"""
UnsignedIntegerType : IntegerType
"""
p[0] = p[1]
def p_IntegerTypeShort(self, p):
"""
IntegerType : SHORT
"""
p[0] = IDLBuiltinType.Types.short
def p_IntegerTypeLong(self, p):
"""
IntegerType : LONG OptionalLong
"""
if p[2]:
p[0] = IDLBuiltinType.Types.long_long
else:
p[0] = IDLBuiltinType.Types.long
def p_OptionalLong(self, p):
"""
OptionalLong : LONG
"""
p[0] = True
def p_OptionalLongEmpty(self, p):
"""
OptionalLong :
"""
p[0] = False
def p_TypeSuffixBrackets(self, p):
"""
TypeSuffix : LBRACKET RBRACKET TypeSuffix
"""
p[0] = [(IDLMethod.TypeSuffixModifier.Brackets, self.getLocation(p, 1))]
p[0].extend(p[3])
def p_TypeSuffixQMark(self, p):
"""
TypeSuffix : QUESTIONMARK TypeSuffixStartingWithArray
"""
p[0] = [(IDLMethod.TypeSuffixModifier.QMark, self.getLocation(p, 1))]
p[0].extend(p[2])
def p_TypeSuffixEmpty(self, p):
"""
TypeSuffix :
"""
p[0] = []
def p_TypeSuffixStartingWithArray(self, p):
"""
TypeSuffixStartingWithArray : LBRACKET RBRACKET TypeSuffix
"""
p[0] = [(IDLMethod.TypeSuffixModifier.Brackets, self.getLocation(p, 1))]
p[0].extend(p[3])
def p_TypeSuffixStartingWithArrayEmpty(self, p):
"""
TypeSuffixStartingWithArray :
"""
p[0] = []
def p_Null(self, p):
"""
Null : QUESTIONMARK
|
"""
if len(p) > 1:
p[0] = True
else:
p[0] = False
def p_ReturnTypeType(self, p):
"""
ReturnType : Type
"""
p[0] = p[1]
def p_ReturnTypeVoid(self, p):
"""
ReturnType : VOID
"""
p[0] = BuiltinTypes[IDLBuiltinType.Types.void]
def p_ScopedName(self, p):
"""
ScopedName : AbsoluteScopedName
| RelativeScopedName
"""
p[0] = p[1]
def p_AbsoluteScopedName(self, p):
"""
AbsoluteScopedName : SCOPE IDENTIFIER ScopedNameParts
"""
assert False
pass
def p_RelativeScopedName(self, p):
"""
RelativeScopedName : IDENTIFIER ScopedNameParts
"""
assert not p[2] # Not implemented!
p[0] = IDLUnresolvedIdentifier(self.getLocation(p, 1), p[1])
def p_ScopedNameParts(self, p):
"""
ScopedNameParts : SCOPE IDENTIFIER ScopedNameParts
"""
assert False
pass
def p_ScopedNamePartsEmpty(self, p):
"""
ScopedNameParts :
"""
p[0] = None
def p_ExtendedAttributeNoArgs(self, p):
"""
ExtendedAttributeNoArgs : IDENTIFIER
"""
p[0] = (p[1],)
def p_ExtendedAttributeArgList(self, p):
"""
ExtendedAttributeArgList : IDENTIFIER LPAREN ArgumentList RPAREN
"""
p[0] = (p[1], p[3])
def p_ExtendedAttributeIdent(self, p):
"""
ExtendedAttributeIdent : IDENTIFIER EQUALS STRING
| IDENTIFIER EQUALS IDENTIFIER
"""
p[0] = (p[1], p[3])
def p_ExtendedAttributeNamedArgList(self, p):
"""
ExtendedAttributeNamedArgList : IDENTIFIER EQUALS IDENTIFIER LPAREN ArgumentList RPAREN
"""
p[0] = (p[1], p[3], p[5])
def p_error(self, p):
if not p:
raise WebIDLError("Syntax Error at end of file. Possibly due to missing semicolon(;), braces(}) or both", None)
else:
raise WebIDLError("invalid syntax", Location(self.lexer, p.lineno, p.lexpos, self._filename))
def __init__(self, outputdir=''):
Tokenizer.__init__(self, outputdir)
self.parser = yacc.yacc(module=self,
outputdir=outputdir,
tabmodule='webidlyacc')
self._globalScope = IDLScope(BuiltinLocation("<Global Scope>"), None, None)
self._productions = []
self._filename = "<builtin>"
self.lexer.input(Parser._builtins)
self._filename = None
self.parser.parse(lexer=self.lexer)
def parse(self, t, filename=None):
self.lexer.input(t)
#for tok in iter(self.lexer.token, None):
# print tok
self._filename = filename
self._productions.extend(self.parser.parse(lexer=self.lexer))
self._filename = None
def finish(self):
for production in self._productions:
production.finish(self.globalScope())
# De-duplicate self._productions, without modifying its order.
seen = set()
result = []
for p in self._productions:
if p not in seen:
seen.add(p)
result.append(p)
return result
def reset(self):
return Parser()
# Builtin IDL defined by WebIDL
_builtins = """
typedef unsigned long long DOMTimeStamp;
"""
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