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Diffstat (limited to 'testing/gmock/scripts/generator/cpp/ast.py')
| -rwxr-xr-x | testing/gmock/scripts/generator/cpp/ast.py | 1713 |
1 files changed, 0 insertions, 1713 deletions
diff --git a/testing/gmock/scripts/generator/cpp/ast.py b/testing/gmock/scripts/generator/cpp/ast.py deleted file mode 100755 index 6d1c8d3..0000000 --- a/testing/gmock/scripts/generator/cpp/ast.py +++ /dev/null @@ -1,1713 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 2007 Neal Norwitz -# Portions Copyright 2007 Google Inc. -# -# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. - -"""Generate an Abstract Syntax Tree (AST) for C++.""" - -__author__ = 'nnorwitz@google.com (Neal Norwitz)' - - -# TODO: -# * Tokens should never be exported, need to convert to Nodes -# (return types, parameters, etc.) -# * Handle static class data for templatized classes -# * Handle casts (both C++ and C-style) -# * Handle conditions and loops (if/else, switch, for, while/do) -# -# TODO much, much later: -# * Handle #define -# * exceptions - - -try: - # Python 3.x - import builtins -except ImportError: - # Python 2.x - import __builtin__ as builtins - -import sys -import traceback - -from cpp import keywords -from cpp import tokenize -from cpp import utils - - -if not hasattr(builtins, 'reversed'): - # Support Python 2.3 and earlier. - def reversed(seq): - for i in range(len(seq)-1, -1, -1): - yield seq[i] - -if not hasattr(builtins, 'next'): - # Support Python 2.5 and earlier. - def next(obj): - return obj.next() - - -VISIBILITY_PUBLIC, VISIBILITY_PROTECTED, VISIBILITY_PRIVATE = range(3) - -FUNCTION_NONE = 0x00 -FUNCTION_CONST = 0x01 -FUNCTION_VIRTUAL = 0x02 -FUNCTION_PURE_VIRTUAL = 0x04 -FUNCTION_CTOR = 0x08 -FUNCTION_DTOR = 0x10 -FUNCTION_ATTRIBUTE = 0x20 -FUNCTION_UNKNOWN_ANNOTATION = 0x40 -FUNCTION_THROW = 0x80 - -""" -These are currently unused. Should really handle these properly at some point. - -TYPE_MODIFIER_INLINE = 0x010000 -TYPE_MODIFIER_EXTERN = 0x020000 -TYPE_MODIFIER_STATIC = 0x040000 -TYPE_MODIFIER_CONST = 0x080000 -TYPE_MODIFIER_REGISTER = 0x100000 -TYPE_MODIFIER_VOLATILE = 0x200000 -TYPE_MODIFIER_MUTABLE = 0x400000 - -TYPE_MODIFIER_MAP = { - 'inline': TYPE_MODIFIER_INLINE, - 'extern': TYPE_MODIFIER_EXTERN, - 'static': TYPE_MODIFIER_STATIC, - 'const': TYPE_MODIFIER_CONST, - 'register': TYPE_MODIFIER_REGISTER, - 'volatile': TYPE_MODIFIER_VOLATILE, - 'mutable': TYPE_MODIFIER_MUTABLE, - } -""" - -_INTERNAL_TOKEN = 'internal' -_NAMESPACE_POP = 'ns-pop' - - -# TODO(nnorwitz): use this as a singleton for templated_types, etc -# where we don't want to create a new empty dict each time. It is also const. -class _NullDict(object): - __contains__ = lambda self: False - keys = values = items = iterkeys = itervalues = iteritems = lambda self: () - - -# TODO(nnorwitz): move AST nodes into a separate module. -class Node(object): - """Base AST node.""" - - def __init__(self, start, end): - self.start = start - self.end = end - - def IsDeclaration(self): - """Returns bool if this node is a declaration.""" - return False - - def IsDefinition(self): - """Returns bool if this node is a definition.""" - return False - - def IsExportable(self): - """Returns bool if this node exportable from a header file.""" - return False - - def Requires(self, node): - """Does this AST node require the definition of the node passed in?""" - return False - - def XXX__str__(self): - return self._StringHelper(self.__class__.__name__, '') - - def _StringHelper(self, name, suffix): - if not utils.DEBUG: - return '%s(%s)' % (name, suffix) - return '%s(%d, %d, %s)' % (name, self.start, self.end, suffix) - - def __repr__(self): - return str(self) - - -class Define(Node): - def __init__(self, start, end, name, definition): - Node.__init__(self, start, end) - self.name = name - self.definition = definition - - def __str__(self): - value = '%s %s' % (self.name, self.definition) - return self._StringHelper(self.__class__.__name__, value) - - -class Include(Node): - def __init__(self, start, end, filename, system): - Node.__init__(self, start, end) - self.filename = filename - self.system = system - - def __str__(self): - fmt = '"%s"' - if self.system: - fmt = '<%s>' - return self._StringHelper(self.__class__.__name__, fmt % self.filename) - - -class Goto(Node): - def __init__(self, start, end, label): - Node.__init__(self, start, end) - self.label = label - - def __str__(self): - return self._StringHelper(self.__class__.__name__, str(self.label)) - - -class Expr(Node): - def __init__(self, start, end, expr): - Node.__init__(self, start, end) - self.expr = expr - - def Requires(self, node): - # TODO(nnorwitz): impl. - return False - - def __str__(self): - return self._StringHelper(self.__class__.__name__, str(self.expr)) - - -class Return(Expr): - pass - - -class Delete(Expr): - pass - - -class Friend(Expr): - def __init__(self, start, end, expr, namespace): - Expr.__init__(self, start, end, expr) - self.namespace = namespace[:] - - -class Using(Node): - def __init__(self, start, end, names): - Node.__init__(self, start, end) - self.names = names - - def __str__(self): - return self._StringHelper(self.__class__.__name__, str(self.names)) - - -class Parameter(Node): - def __init__(self, start, end, name, parameter_type, default): - Node.__init__(self, start, end) - self.name = name - self.type = parameter_type - self.default = default - - def Requires(self, node): - # TODO(nnorwitz): handle namespaces, etc. - return self.type.name == node.name - - def __str__(self): - name = str(self.type) - suffix = '%s %s' % (name, self.name) - if self.default: - suffix += ' = ' + ''.join([d.name for d in self.default]) - return self._StringHelper(self.__class__.__name__, suffix) - - -class _GenericDeclaration(Node): - def __init__(self, start, end, name, namespace): - Node.__init__(self, start, end) - self.name = name - self.namespace = namespace[:] - - def FullName(self): - prefix = '' - if self.namespace and self.namespace[-1]: - prefix = '::'.join(self.namespace) + '::' - return prefix + self.name - - def _TypeStringHelper(self, suffix): - if self.namespace: - names = [n or '<anonymous>' for n in self.namespace] - suffix += ' in ' + '::'.join(names) - return self._StringHelper(self.__class__.__name__, suffix) - - -# TODO(nnorwitz): merge with Parameter in some way? -class VariableDeclaration(_GenericDeclaration): - def __init__(self, start, end, name, var_type, initial_value, namespace): - _GenericDeclaration.__init__(self, start, end, name, namespace) - self.type = var_type - self.initial_value = initial_value - - def Requires(self, node): - # TODO(nnorwitz): handle namespaces, etc. - return self.type.name == node.name - - def ToString(self): - """Return a string that tries to reconstitute the variable decl.""" - suffix = '%s %s' % (self.type, self.name) - if self.initial_value: - suffix += ' = ' + self.initial_value - return suffix - - def __str__(self): - return self._StringHelper(self.__class__.__name__, self.ToString()) - - -class Typedef(_GenericDeclaration): - def __init__(self, start, end, name, alias, namespace): - _GenericDeclaration.__init__(self, start, end, name, namespace) - self.alias = alias - - def IsDefinition(self): - return True - - def IsExportable(self): - return True - - def Requires(self, node): - # TODO(nnorwitz): handle namespaces, etc. - name = node.name - for token in self.alias: - if token is not None and name == token.name: - return True - return False - - def __str__(self): - suffix = '%s, %s' % (self.name, self.alias) - return self._TypeStringHelper(suffix) - - -class _NestedType(_GenericDeclaration): - def __init__(self, start, end, name, fields, namespace): - _GenericDeclaration.__init__(self, start, end, name, namespace) - self.fields = fields - - def IsDefinition(self): - return True - - def IsExportable(self): - return True - - def __str__(self): - suffix = '%s, {%s}' % (self.name, self.fields) - return self._TypeStringHelper(suffix) - - -class Union(_NestedType): - pass - - -class Enum(_NestedType): - pass - - -class Class(_GenericDeclaration): - def __init__(self, start, end, name, bases, templated_types, body, namespace): - _GenericDeclaration.__init__(self, start, end, name, namespace) - self.bases = bases - self.body = body - self.templated_types = templated_types - - def IsDeclaration(self): - return self.bases is None and self.body is None - - def IsDefinition(self): - return not self.IsDeclaration() - - def IsExportable(self): - return not self.IsDeclaration() - - def Requires(self, node): - # TODO(nnorwitz): handle namespaces, etc. - if self.bases: - for token_list in self.bases: - # TODO(nnorwitz): bases are tokens, do name comparision. - for token in token_list: - if token.name == node.name: - return True - # TODO(nnorwitz): search in body too. - return False - - def __str__(self): - name = self.name - if self.templated_types: - name += '<%s>' % self.templated_types - suffix = '%s, %s, %s' % (name, self.bases, self.body) - return self._TypeStringHelper(suffix) - - -class Struct(Class): - pass - - -class Function(_GenericDeclaration): - def __init__(self, start, end, name, return_type, parameters, - modifiers, templated_types, body, namespace): - _GenericDeclaration.__init__(self, start, end, name, namespace) - converter = TypeConverter(namespace) - self.return_type = converter.CreateReturnType(return_type) - self.parameters = converter.ToParameters(parameters) - self.modifiers = modifiers - self.body = body - self.templated_types = templated_types - - def IsDeclaration(self): - return self.body is None - - def IsDefinition(self): - return self.body is not None - - def IsExportable(self): - if self.return_type and 'static' in self.return_type.modifiers: - return False - return None not in self.namespace - - def Requires(self, node): - if self.parameters: - # TODO(nnorwitz): parameters are tokens, do name comparision. - for p in self.parameters: - if p.name == node.name: - return True - # TODO(nnorwitz): search in body too. - return False - - def __str__(self): - # TODO(nnorwitz): add templated_types. - suffix = ('%s %s(%s), 0x%02x, %s' % - (self.return_type, self.name, self.parameters, - self.modifiers, self.body)) - return self._TypeStringHelper(suffix) - - -class Method(Function): - def __init__(self, start, end, name, in_class, return_type, parameters, - modifiers, templated_types, body, namespace): - Function.__init__(self, start, end, name, return_type, parameters, - modifiers, templated_types, body, namespace) - # TODO(nnorwitz): in_class could also be a namespace which can - # mess up finding functions properly. - self.in_class = in_class - - -class Type(_GenericDeclaration): - """Type used for any variable (eg class, primitive, struct, etc).""" - - def __init__(self, start, end, name, templated_types, modifiers, - reference, pointer, array): - """ - Args: - name: str name of main type - templated_types: [Class (Type?)] template type info between <> - modifiers: [str] type modifiers (keywords) eg, const, mutable, etc. - reference, pointer, array: bools - """ - _GenericDeclaration.__init__(self, start, end, name, []) - self.templated_types = templated_types - if not name and modifiers: - self.name = modifiers.pop() - self.modifiers = modifiers - self.reference = reference - self.pointer = pointer - self.array = array - - def __str__(self): - prefix = '' - if self.modifiers: - prefix = ' '.join(self.modifiers) + ' ' - name = str(self.name) - if self.templated_types: - name += '<%s>' % self.templated_types - suffix = prefix + name - if self.reference: - suffix += '&' - if self.pointer: - suffix += '*' - if self.array: - suffix += '[]' - return self._TypeStringHelper(suffix) - - # By definition, Is* are always False. A Type can only exist in - # some sort of variable declaration, parameter, or return value. - def IsDeclaration(self): - return False - - def IsDefinition(self): - return False - - def IsExportable(self): - return False - - -class TypeConverter(object): - - def __init__(self, namespace_stack): - self.namespace_stack = namespace_stack - - def _GetTemplateEnd(self, tokens, start): - count = 1 - end = start - while 1: - token = tokens[end] - end += 1 - if token.name == '<': - count += 1 - elif token.name == '>': - count -= 1 - if count == 0: - break - return tokens[start:end-1], end - - def ToType(self, tokens): - """Convert [Token,...] to [Class(...), ] useful for base classes. - For example, code like class Foo : public Bar<x, y> { ... }; - the "Bar<x, y>" portion gets converted to an AST. - - Returns: - [Class(...), ...] - """ - result = [] - name_tokens = [] - reference = pointer = array = False - - def AddType(templated_types): - # Partition tokens into name and modifier tokens. - names = [] - modifiers = [] - for t in name_tokens: - if keywords.IsKeyword(t.name): - modifiers.append(t.name) - else: - names.append(t.name) - name = ''.join(names) - result.append(Type(name_tokens[0].start, name_tokens[-1].end, - name, templated_types, modifiers, - reference, pointer, array)) - del name_tokens[:] - - i = 0 - end = len(tokens) - while i < end: - token = tokens[i] - if token.name == '<': - new_tokens, new_end = self._GetTemplateEnd(tokens, i+1) - AddType(self.ToType(new_tokens)) - # If there is a comma after the template, we need to consume - # that here otherwise it becomes part of the name. - i = new_end - reference = pointer = array = False - elif token.name == ',': - AddType([]) - reference = pointer = array = False - elif token.name == '*': - pointer = True - elif token.name == '&': - reference = True - elif token.name == '[': - pointer = True - elif token.name == ']': - pass - else: - name_tokens.append(token) - i += 1 - - if name_tokens: - # No '<' in the tokens, just a simple name and no template. - AddType([]) - return result - - def DeclarationToParts(self, parts, needs_name_removed): - name = None - default = [] - if needs_name_removed: - # Handle default (initial) values properly. - for i, t in enumerate(parts): - if t.name == '=': - default = parts[i+1:] - name = parts[i-1].name - if name == ']' and parts[i-2].name == '[': - name = parts[i-3].name - i -= 1 - parts = parts[:i-1] - break - else: - if parts[-1].token_type == tokenize.NAME: - name = parts.pop().name - else: - # TODO(nnorwitz): this is a hack that happens for code like - # Register(Foo<T>); where it thinks this is a function call - # but it's actually a declaration. - name = '???' - modifiers = [] - type_name = [] - other_tokens = [] - templated_types = [] - i = 0 - end = len(parts) - while i < end: - p = parts[i] - if keywords.IsKeyword(p.name): - modifiers.append(p.name) - elif p.name == '<': - templated_tokens, new_end = self._GetTemplateEnd(parts, i+1) - templated_types = self.ToType(templated_tokens) - i = new_end - 1 - # Don't add a spurious :: to data members being initialized. - next_index = i + 1 - if next_index < end and parts[next_index].name == '::': - i += 1 - elif p.name in ('[', ']', '='): - # These are handled elsewhere. - other_tokens.append(p) - elif p.name not in ('*', '&', '>'): - # Ensure that names have a space between them. - if (type_name and type_name[-1].token_type == tokenize.NAME and - p.token_type == tokenize.NAME): - type_name.append(tokenize.Token(tokenize.SYNTAX, ' ', 0, 0)) - type_name.append(p) - else: - other_tokens.append(p) - i += 1 - type_name = ''.join([t.name for t in type_name]) - return name, type_name, templated_types, modifiers, default, other_tokens - - def ToParameters(self, tokens): - if not tokens: - return [] - - result = [] - name = type_name = '' - type_modifiers = [] - pointer = reference = array = False - first_token = None - default = [] - - def AddParameter(): - if default: - del default[0] # Remove flag. - end = type_modifiers[-1].end - parts = self.DeclarationToParts(type_modifiers, True) - (name, type_name, templated_types, modifiers, - unused_default, unused_other_tokens) = parts - parameter_type = Type(first_token.start, first_token.end, - type_name, templated_types, modifiers, - reference, pointer, array) - p = Parameter(first_token.start, end, name, - parameter_type, default) - result.append(p) - - template_count = 0 - for s in tokens: - if not first_token: - first_token = s - if s.name == '<': - template_count += 1 - elif s.name == '>': - template_count -= 1 - if template_count > 0: - type_modifiers.append(s) - continue - - if s.name == ',': - AddParameter() - name = type_name = '' - type_modifiers = [] - pointer = reference = array = False - first_token = None - default = [] - elif s.name == '*': - pointer = True - elif s.name == '&': - reference = True - elif s.name == '[': - array = True - elif s.name == ']': - pass # Just don't add to type_modifiers. - elif s.name == '=': - # Got a default value. Add any value (None) as a flag. - default.append(None) - elif default: - default.append(s) - else: - type_modifiers.append(s) - AddParameter() - return result - - def CreateReturnType(self, return_type_seq): - if not return_type_seq: - return None - start = return_type_seq[0].start - end = return_type_seq[-1].end - _, name, templated_types, modifiers, default, other_tokens = \ - self.DeclarationToParts(return_type_seq, False) - names = [n.name for n in other_tokens] - reference = '&' in names - pointer = '*' in names - array = '[' in names - return Type(start, end, name, templated_types, modifiers, - reference, pointer, array) - - def GetTemplateIndices(self, names): - # names is a list of strings. - start = names.index('<') - end = len(names) - 1 - while end > 0: - if names[end] == '>': - break - end -= 1 - return start, end+1 - -class AstBuilder(object): - def __init__(self, token_stream, filename, in_class='', visibility=None, - namespace_stack=[]): - self.tokens = token_stream - self.filename = filename - # TODO(nnorwitz): use a better data structure (deque) for the queue. - # Switching directions of the "queue" improved perf by about 25%. - # Using a deque should be even better since we access from both sides. - self.token_queue = [] - self.namespace_stack = namespace_stack[:] - self.in_class = in_class - if in_class is None: - self.in_class_name_only = None - else: - self.in_class_name_only = in_class.split('::')[-1] - self.visibility = visibility - self.in_function = False - self.current_token = None - # Keep the state whether we are currently handling a typedef or not. - self._handling_typedef = False - - self.converter = TypeConverter(self.namespace_stack) - - def HandleError(self, msg, token): - printable_queue = list(reversed(self.token_queue[-20:])) - sys.stderr.write('Got %s in %s @ %s %s\n' % - (msg, self.filename, token, printable_queue)) - - def Generate(self): - while 1: - token = self._GetNextToken() - if not token: - break - - # Get the next token. - self.current_token = token - - # Dispatch on the next token type. - if token.token_type == _INTERNAL_TOKEN: - if token.name == _NAMESPACE_POP: - self.namespace_stack.pop() - continue - - try: - result = self._GenerateOne(token) - if result is not None: - yield result - except: - self.HandleError('exception', token) - raise - - def _CreateVariable(self, pos_token, name, type_name, type_modifiers, - ref_pointer_name_seq, templated_types, value=None): - reference = '&' in ref_pointer_name_seq - pointer = '*' in ref_pointer_name_seq - array = '[' in ref_pointer_name_seq - var_type = Type(pos_token.start, pos_token.end, type_name, - templated_types, type_modifiers, - reference, pointer, array) - return VariableDeclaration(pos_token.start, pos_token.end, - name, var_type, value, self.namespace_stack) - - def _GenerateOne(self, token): - if token.token_type == tokenize.NAME: - if (keywords.IsKeyword(token.name) and - not keywords.IsBuiltinType(token.name)): - method = getattr(self, 'handle_' + token.name) - return method() - elif token.name == self.in_class_name_only: - # The token name is the same as the class, must be a ctor if - # there is a paren. Otherwise, it's the return type. - # Peek ahead to get the next token to figure out which. - next = self._GetNextToken() - self._AddBackToken(next) - if next.token_type == tokenize.SYNTAX and next.name == '(': - return self._GetMethod([token], FUNCTION_CTOR, None, True) - # Fall through--handle like any other method. - - # Handle data or function declaration/definition. - syntax = tokenize.SYNTAX - temp_tokens, last_token = \ - self._GetVarTokensUpTo(syntax, '(', ';', '{', '[') - temp_tokens.insert(0, token) - if last_token.name == '(': - # If there is an assignment before the paren, - # this is an expression, not a method. - expr = bool([e for e in temp_tokens if e.name == '=']) - if expr: - new_temp = self._GetTokensUpTo(tokenize.SYNTAX, ';') - temp_tokens.append(last_token) - temp_tokens.extend(new_temp) - last_token = tokenize.Token(tokenize.SYNTAX, ';', 0, 0) - - if last_token.name == '[': - # Handle array, this isn't a method, unless it's an operator. - # TODO(nnorwitz): keep the size somewhere. - # unused_size = self._GetTokensUpTo(tokenize.SYNTAX, ']') - temp_tokens.append(last_token) - if temp_tokens[-2].name == 'operator': - temp_tokens.append(self._GetNextToken()) - else: - temp_tokens2, last_token = \ - self._GetVarTokensUpTo(tokenize.SYNTAX, ';') - temp_tokens.extend(temp_tokens2) - - if last_token.name == ';': - # Handle data, this isn't a method. - parts = self.converter.DeclarationToParts(temp_tokens, True) - (name, type_name, templated_types, modifiers, default, - unused_other_tokens) = parts - - t0 = temp_tokens[0] - names = [t.name for t in temp_tokens] - if templated_types: - start, end = self.converter.GetTemplateIndices(names) - names = names[:start] + names[end:] - default = ''.join([t.name for t in default]) - return self._CreateVariable(t0, name, type_name, modifiers, - names, templated_types, default) - if last_token.name == '{': - self._AddBackTokens(temp_tokens[1:]) - self._AddBackToken(last_token) - method_name = temp_tokens[0].name - method = getattr(self, 'handle_' + method_name, None) - if not method: - # Must be declaring a variable. - # TODO(nnorwitz): handle the declaration. - return None - return method() - return self._GetMethod(temp_tokens, 0, None, False) - elif token.token_type == tokenize.SYNTAX: - if token.name == '~' and self.in_class: - # Must be a dtor (probably not in method body). - token = self._GetNextToken() - # self.in_class can contain A::Name, but the dtor will only - # be Name. Make sure to compare against the right value. - if (token.token_type == tokenize.NAME and - token.name == self.in_class_name_only): - return self._GetMethod([token], FUNCTION_DTOR, None, True) - # TODO(nnorwitz): handle a lot more syntax. - elif token.token_type == tokenize.PREPROCESSOR: - # TODO(nnorwitz): handle more preprocessor directives. - # token starts with a #, so remove it and strip whitespace. - name = token.name[1:].lstrip() - if name.startswith('include'): - # Remove "include". - name = name[7:].strip() - assert name - # Handle #include \<newline> "header-on-second-line.h". - if name.startswith('\\'): - name = name[1:].strip() - assert name[0] in '<"', token - assert name[-1] in '>"', token - system = name[0] == '<' - filename = name[1:-1] - return Include(token.start, token.end, filename, system) - if name.startswith('define'): - # Remove "define". - name = name[6:].strip() - assert name - value = '' - for i, c in enumerate(name): - if c.isspace(): - value = name[i:].lstrip() - name = name[:i] - break - return Define(token.start, token.end, name, value) - if name.startswith('if') and name[2:3].isspace(): - condition = name[3:].strip() - if condition.startswith('0') or condition.startswith('(0)'): - self._SkipIf0Blocks() - return None - - def _GetTokensUpTo(self, expected_token_type, expected_token): - return self._GetVarTokensUpTo(expected_token_type, expected_token)[0] - - def _GetVarTokensUpTo(self, expected_token_type, *expected_tokens): - last_token = self._GetNextToken() - tokens = [] - while (last_token.token_type != expected_token_type or - last_token.name not in expected_tokens): - tokens.append(last_token) - last_token = self._GetNextToken() - return tokens, last_token - - # TODO(nnorwitz): remove _IgnoreUpTo() it shouldn't be necesary. - def _IgnoreUpTo(self, token_type, token): - unused_tokens = self._GetTokensUpTo(token_type, token) - - def _SkipIf0Blocks(self): - count = 1 - while 1: - token = self._GetNextToken() - if token.token_type != tokenize.PREPROCESSOR: - continue - - name = token.name[1:].lstrip() - if name.startswith('endif'): - count -= 1 - if count == 0: - break - elif name.startswith('if'): - count += 1 - - def _GetMatchingChar(self, open_paren, close_paren, GetNextToken=None): - if GetNextToken is None: - GetNextToken = self._GetNextToken - # Assumes the current token is open_paren and we will consume - # and return up to the close_paren. - count = 1 - token = GetNextToken() - while 1: - if token.token_type == tokenize.SYNTAX: - if token.name == open_paren: - count += 1 - elif token.name == close_paren: - count -= 1 - if count == 0: - break - yield token - token = GetNextToken() - yield token - - def _GetParameters(self): - return self._GetMatchingChar('(', ')') - - def GetScope(self): - return self._GetMatchingChar('{', '}') - - def _GetNextToken(self): - if self.token_queue: - return self.token_queue.pop() - return next(self.tokens) - - def _AddBackToken(self, token): - if token.whence == tokenize.WHENCE_STREAM: - token.whence = tokenize.WHENCE_QUEUE - self.token_queue.insert(0, token) - else: - assert token.whence == tokenize.WHENCE_QUEUE, token - self.token_queue.append(token) - - def _AddBackTokens(self, tokens): - if tokens: - if tokens[-1].whence == tokenize.WHENCE_STREAM: - for token in tokens: - token.whence = tokenize.WHENCE_QUEUE - self.token_queue[:0] = reversed(tokens) - else: - assert tokens[-1].whence == tokenize.WHENCE_QUEUE, tokens - self.token_queue.extend(reversed(tokens)) - - def GetName(self, seq=None): - """Returns ([tokens], next_token_info).""" - GetNextToken = self._GetNextToken - if seq is not None: - it = iter(seq) - GetNextToken = lambda: next(it) - next_token = GetNextToken() - tokens = [] - last_token_was_name = False - while (next_token.token_type == tokenize.NAME or - (next_token.token_type == tokenize.SYNTAX and - next_token.name in ('::', '<'))): - # Two NAMEs in a row means the identifier should terminate. - # It's probably some sort of variable declaration. - if last_token_was_name and next_token.token_type == tokenize.NAME: - break - last_token_was_name = next_token.token_type == tokenize.NAME - tokens.append(next_token) - # Handle templated names. - if next_token.name == '<': - tokens.extend(self._GetMatchingChar('<', '>', GetNextToken)) - last_token_was_name = True - next_token = GetNextToken() - return tokens, next_token - - def GetMethod(self, modifiers, templated_types): - return_type_and_name = self._GetTokensUpTo(tokenize.SYNTAX, '(') - assert len(return_type_and_name) >= 1 - return self._GetMethod(return_type_and_name, modifiers, templated_types, - False) - - def _GetMethod(self, return_type_and_name, modifiers, templated_types, - get_paren): - template_portion = None - if get_paren: - token = self._GetNextToken() - assert token.token_type == tokenize.SYNTAX, token - if token.name == '<': - # Handle templatized dtors. - template_portion = [token] - template_portion.extend(self._GetMatchingChar('<', '>')) - token = self._GetNextToken() - assert token.token_type == tokenize.SYNTAX, token - assert token.name == '(', token - - name = return_type_and_name.pop() - # Handle templatized ctors. - if name.name == '>': - index = 1 - while return_type_and_name[index].name != '<': - index += 1 - template_portion = return_type_and_name[index:] + [name] - del return_type_and_name[index:] - name = return_type_and_name.pop() - elif name.name == ']': - rt = return_type_and_name - assert rt[-1].name == '[', return_type_and_name - assert rt[-2].name == 'operator', return_type_and_name - name_seq = return_type_and_name[-2:] - del return_type_and_name[-2:] - name = tokenize.Token(tokenize.NAME, 'operator[]', - name_seq[0].start, name.end) - # Get the open paren so _GetParameters() below works. - unused_open_paren = self._GetNextToken() - - # TODO(nnorwitz): store template_portion. - return_type = return_type_and_name - indices = name - if return_type: - indices = return_type[0] - - # Force ctor for templatized ctors. - if name.name == self.in_class and not modifiers: - modifiers |= FUNCTION_CTOR - parameters = list(self._GetParameters()) - del parameters[-1] # Remove trailing ')'. - - # Handling operator() is especially weird. - if name.name == 'operator' and not parameters: - token = self._GetNextToken() - assert token.name == '(', token - parameters = list(self._GetParameters()) - del parameters[-1] # Remove trailing ')'. - - token = self._GetNextToken() - while token.token_type == tokenize.NAME: - modifier_token = token - token = self._GetNextToken() - if modifier_token.name == 'const': - modifiers |= FUNCTION_CONST - elif modifier_token.name == '__attribute__': - # TODO(nnorwitz): handle more __attribute__ details. - modifiers |= FUNCTION_ATTRIBUTE - assert token.name == '(', token - # Consume everything between the (parens). - unused_tokens = list(self._GetMatchingChar('(', ')')) - token = self._GetNextToken() - elif modifier_token.name == 'throw': - modifiers |= FUNCTION_THROW - assert token.name == '(', token - # Consume everything between the (parens). - unused_tokens = list(self._GetMatchingChar('(', ')')) - token = self._GetNextToken() - elif modifier_token.name == modifier_token.name.upper(): - # HACK(nnorwitz): assume that all upper-case names - # are some macro we aren't expanding. - modifiers |= FUNCTION_UNKNOWN_ANNOTATION - else: - self.HandleError('unexpected token', modifier_token) - - assert token.token_type == tokenize.SYNTAX, token - # Handle ctor initializers. - if token.name == ':': - # TODO(nnorwitz): anything else to handle for initializer list? - while token.name != ';' and token.name != '{': - token = self._GetNextToken() - - # Handle pointer to functions that are really data but look - # like method declarations. - if token.name == '(': - if parameters[0].name == '*': - # name contains the return type. - name = parameters.pop() - # parameters contains the name of the data. - modifiers = [p.name for p in parameters] - # Already at the ( to open the parameter list. - function_parameters = list(self._GetMatchingChar('(', ')')) - del function_parameters[-1] # Remove trailing ')'. - # TODO(nnorwitz): store the function_parameters. - token = self._GetNextToken() - assert token.token_type == tokenize.SYNTAX, token - assert token.name == ';', token - return self._CreateVariable(indices, name.name, indices.name, - modifiers, '', None) - # At this point, we got something like: - # return_type (type::*name_)(params); - # This is a data member called name_ that is a function pointer. - # With this code: void (sq_type::*field_)(string&); - # We get: name=void return_type=[] parameters=sq_type ... field_ - # TODO(nnorwitz): is return_type always empty? - # TODO(nnorwitz): this isn't even close to being correct. - # Just put in something so we don't crash and can move on. - real_name = parameters[-1] - modifiers = [p.name for p in self._GetParameters()] - del modifiers[-1] # Remove trailing ')'. - return self._CreateVariable(indices, real_name.name, indices.name, - modifiers, '', None) - - if token.name == '{': - body = list(self.GetScope()) - del body[-1] # Remove trailing '}'. - else: - body = None - if token.name == '=': - token = self._GetNextToken() - assert token.token_type == tokenize.CONSTANT, token - assert token.name == '0', token - modifiers |= FUNCTION_PURE_VIRTUAL - token = self._GetNextToken() - - if token.name == '[': - # TODO(nnorwitz): store tokens and improve parsing. - # template <typename T, size_t N> char (&ASH(T (&seq)[N]))[N]; - tokens = list(self._GetMatchingChar('[', ']')) - token = self._GetNextToken() - - assert token.name == ';', (token, return_type_and_name, parameters) - - # Looks like we got a method, not a function. - if len(return_type) > 2 and return_type[-1].name == '::': - return_type, in_class = \ - self._GetReturnTypeAndClassName(return_type) - return Method(indices.start, indices.end, name.name, in_class, - return_type, parameters, modifiers, templated_types, - body, self.namespace_stack) - return Function(indices.start, indices.end, name.name, return_type, - parameters, modifiers, templated_types, body, - self.namespace_stack) - - def _GetReturnTypeAndClassName(self, token_seq): - # Splitting the return type from the class name in a method - # can be tricky. For example, Return::Type::Is::Hard::To::Find(). - # Where is the return type and where is the class name? - # The heuristic used is to pull the last name as the class name. - # This includes all the templated type info. - # TODO(nnorwitz): if there is only One name like in the - # example above, punt and assume the last bit is the class name. - - # Ignore a :: prefix, if exists so we can find the first real name. - i = 0 - if token_seq[0].name == '::': - i = 1 - # Ignore a :: suffix, if exists. - end = len(token_seq) - 1 - if token_seq[end-1].name == '::': - end -= 1 - - # Make a copy of the sequence so we can append a sentinel - # value. This is required for GetName will has to have some - # terminating condition beyond the last name. - seq_copy = token_seq[i:end] - seq_copy.append(tokenize.Token(tokenize.SYNTAX, '', 0, 0)) - names = [] - while i < end: - # Iterate through the sequence parsing out each name. - new_name, next = self.GetName(seq_copy[i:]) - assert new_name, 'Got empty new_name, next=%s' % next - # We got a pointer or ref. Add it to the name. - if next and next.token_type == tokenize.SYNTAX: - new_name.append(next) - names.append(new_name) - i += len(new_name) - - # Now that we have the names, it's time to undo what we did. - - # Remove the sentinel value. - names[-1].pop() - # Flatten the token sequence for the return type. - return_type = [e for seq in names[:-1] for e in seq] - # The class name is the last name. - class_name = names[-1] - return return_type, class_name - - def handle_bool(self): - pass - - def handle_char(self): - pass - - def handle_int(self): - pass - - def handle_long(self): - pass - - def handle_short(self): - pass - - def handle_double(self): - pass - - def handle_float(self): - pass - - def handle_void(self): - pass - - def handle_wchar_t(self): - pass - - def handle_unsigned(self): - pass - - def handle_signed(self): - pass - - def _GetNestedType(self, ctor): - name = None - name_tokens, token = self.GetName() - if name_tokens: - name = ''.join([t.name for t in name_tokens]) - - # Handle forward declarations. - if token.token_type == tokenize.SYNTAX and token.name == ';': - return ctor(token.start, token.end, name, None, - self.namespace_stack) - - if token.token_type == tokenize.NAME and self._handling_typedef: - self._AddBackToken(token) - return ctor(token.start, token.end, name, None, - self.namespace_stack) - - # Must be the type declaration. - fields = list(self._GetMatchingChar('{', '}')) - del fields[-1] # Remove trailing '}'. - if token.token_type == tokenize.SYNTAX and token.name == '{': - next = self._GetNextToken() - new_type = ctor(token.start, token.end, name, fields, - self.namespace_stack) - # A name means this is an anonymous type and the name - # is the variable declaration. - if next.token_type != tokenize.NAME: - return new_type - name = new_type - token = next - - # Must be variable declaration using the type prefixed with keyword. - assert token.token_type == tokenize.NAME, token - return self._CreateVariable(token, token.name, name, [], '', None) - - def handle_struct(self): - # Special case the handling typedef/aliasing of structs here. - # It would be a pain to handle in the class code. - name_tokens, var_token = self.GetName() - if name_tokens: - next_token = self._GetNextToken() - is_syntax = (var_token.token_type == tokenize.SYNTAX and - var_token.name[0] in '*&') - is_variable = (var_token.token_type == tokenize.NAME and - next_token.name == ';') - variable = var_token - if is_syntax and not is_variable: - variable = next_token - temp = self._GetNextToken() - if temp.token_type == tokenize.SYNTAX and temp.name == '(': - # Handle methods declared to return a struct. - t0 = name_tokens[0] - struct = tokenize.Token(tokenize.NAME, 'struct', - t0.start-7, t0.start-2) - type_and_name = [struct] - type_and_name.extend(name_tokens) - type_and_name.extend((var_token, next_token)) - return self._GetMethod(type_and_name, 0, None, False) - assert temp.name == ';', (temp, name_tokens, var_token) - if is_syntax or (is_variable and not self._handling_typedef): - modifiers = ['struct'] - type_name = ''.join([t.name for t in name_tokens]) - position = name_tokens[0] - return self._CreateVariable(position, variable.name, type_name, - modifiers, var_token.name, None) - name_tokens.extend((var_token, next_token)) - self._AddBackTokens(name_tokens) - else: - self._AddBackToken(var_token) - return self._GetClass(Struct, VISIBILITY_PUBLIC, None) - - def handle_union(self): - return self._GetNestedType(Union) - - def handle_enum(self): - return self._GetNestedType(Enum) - - def handle_auto(self): - # TODO(nnorwitz): warn about using auto? Probably not since it - # will be reclaimed and useful for C++0x. - pass - - def handle_register(self): - pass - - def handle_const(self): - pass - - def handle_inline(self): - pass - - def handle_extern(self): - pass - - def handle_static(self): - pass - - def handle_virtual(self): - # What follows must be a method. - token = token2 = self._GetNextToken() - if token.name == 'inline': - # HACK(nnorwitz): handle inline dtors by ignoring 'inline'. - token2 = self._GetNextToken() - if token2.token_type == tokenize.SYNTAX and token2.name == '~': - return self.GetMethod(FUNCTION_VIRTUAL + FUNCTION_DTOR, None) - assert token.token_type == tokenize.NAME or token.name == '::', token - return_type_and_name = self._GetTokensUpTo(tokenize.SYNTAX, '(') - return_type_and_name.insert(0, token) - if token2 is not token: - return_type_and_name.insert(1, token2) - return self._GetMethod(return_type_and_name, FUNCTION_VIRTUAL, - None, False) - - def handle_volatile(self): - pass - - def handle_mutable(self): - pass - - def handle_public(self): - assert self.in_class - self.visibility = VISIBILITY_PUBLIC - - def handle_protected(self): - assert self.in_class - self.visibility = VISIBILITY_PROTECTED - - def handle_private(self): - assert self.in_class - self.visibility = VISIBILITY_PRIVATE - - def handle_friend(self): - tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';') - assert tokens - t0 = tokens[0] - return Friend(t0.start, t0.end, tokens, self.namespace_stack) - - def handle_static_cast(self): - pass - - def handle_const_cast(self): - pass - - def handle_dynamic_cast(self): - pass - - def handle_reinterpret_cast(self): - pass - - def handle_new(self): - pass - - def handle_delete(self): - tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';') - assert tokens - return Delete(tokens[0].start, tokens[0].end, tokens) - - def handle_typedef(self): - token = self._GetNextToken() - if (token.token_type == tokenize.NAME and - keywords.IsKeyword(token.name)): - # Token must be struct/enum/union/class. - method = getattr(self, 'handle_' + token.name) - self._handling_typedef = True - tokens = [method()] - self._handling_typedef = False - else: - tokens = [token] - - # Get the remainder of the typedef up to the semi-colon. - tokens.extend(self._GetTokensUpTo(tokenize.SYNTAX, ';')) - - # TODO(nnorwitz): clean all this up. - assert tokens - name = tokens.pop() - indices = name - if tokens: - indices = tokens[0] - if not indices: - indices = token - if name.name == ')': - # HACK(nnorwitz): Handle pointers to functions "properly". - if (len(tokens) >= 4 and - tokens[1].name == '(' and tokens[2].name == '*'): - tokens.append(name) - name = tokens[3] - elif name.name == ']': - # HACK(nnorwitz): Handle arrays properly. - if len(tokens) >= 2: - tokens.append(name) - name = tokens[1] - new_type = tokens - if tokens and isinstance(tokens[0], tokenize.Token): - new_type = self.converter.ToType(tokens)[0] - return Typedef(indices.start, indices.end, name.name, - new_type, self.namespace_stack) - - def handle_typeid(self): - pass # Not needed yet. - - def handle_typename(self): - pass # Not needed yet. - - def _GetTemplatedTypes(self): - result = {} - tokens = list(self._GetMatchingChar('<', '>')) - len_tokens = len(tokens) - 1 # Ignore trailing '>'. - i = 0 - while i < len_tokens: - key = tokens[i].name - i += 1 - if keywords.IsKeyword(key) or key == ',': - continue - type_name = default = None - if i < len_tokens: - i += 1 - if tokens[i-1].name == '=': - assert i < len_tokens, '%s %s' % (i, tokens) - default, unused_next_token = self.GetName(tokens[i:]) - i += len(default) - else: - if tokens[i-1].name != ',': - # We got something like: Type variable. - # Re-adjust the key (variable) and type_name (Type). - key = tokens[i-1].name - type_name = tokens[i-2] - - result[key] = (type_name, default) - return result - - def handle_template(self): - token = self._GetNextToken() - assert token.token_type == tokenize.SYNTAX, token - assert token.name == '<', token - templated_types = self._GetTemplatedTypes() - # TODO(nnorwitz): for now, just ignore the template params. - token = self._GetNextToken() - if token.token_type == tokenize.NAME: - if token.name == 'class': - return self._GetClass(Class, VISIBILITY_PRIVATE, templated_types) - elif token.name == 'struct': - return self._GetClass(Struct, VISIBILITY_PUBLIC, templated_types) - elif token.name == 'friend': - return self.handle_friend() - self._AddBackToken(token) - tokens, last = self._GetVarTokensUpTo(tokenize.SYNTAX, '(', ';') - tokens.append(last) - self._AddBackTokens(tokens) - if last.name == '(': - return self.GetMethod(FUNCTION_NONE, templated_types) - # Must be a variable definition. - return None - - def handle_true(self): - pass # Nothing to do. - - def handle_false(self): - pass # Nothing to do. - - def handle_asm(self): - pass # Not needed yet. - - def handle_class(self): - return self._GetClass(Class, VISIBILITY_PRIVATE, None) - - def _GetBases(self): - # Get base classes. - bases = [] - while 1: - token = self._GetNextToken() - assert token.token_type == tokenize.NAME, token - # TODO(nnorwitz): store kind of inheritance...maybe. - if token.name not in ('public', 'protected', 'private'): - # If inheritance type is not specified, it is private. - # Just put the token back so we can form a name. - # TODO(nnorwitz): it would be good to warn about this. - self._AddBackToken(token) - else: - # Check for virtual inheritance. - token = self._GetNextToken() - if token.name != 'virtual': - self._AddBackToken(token) - else: - # TODO(nnorwitz): store that we got virtual for this base. - pass - base, next_token = self.GetName() - bases_ast = self.converter.ToType(base) - assert len(bases_ast) == 1, bases_ast - bases.append(bases_ast[0]) - assert next_token.token_type == tokenize.SYNTAX, next_token - if next_token.name == '{': - token = next_token - break - # Support multiple inheritance. - assert next_token.name == ',', next_token - return bases, token - - def _GetClass(self, class_type, visibility, templated_types): - class_name = None - class_token = self._GetNextToken() - if class_token.token_type != tokenize.NAME: - assert class_token.token_type == tokenize.SYNTAX, class_token - token = class_token - else: - self._AddBackToken(class_token) - name_tokens, token = self.GetName() - class_name = ''.join([t.name for t in name_tokens]) - bases = None - if token.token_type == tokenize.SYNTAX: - if token.name == ';': - # Forward declaration. - return class_type(class_token.start, class_token.end, - class_name, None, templated_types, None, - self.namespace_stack) - if token.name in '*&': - # Inline forward declaration. Could be method or data. - name_token = self._GetNextToken() - next_token = self._GetNextToken() - if next_token.name == ';': - # Handle data - modifiers = ['class'] - return self._CreateVariable(class_token, name_token.name, - class_name, - modifiers, token.name, None) - else: - # Assume this is a method. - tokens = (class_token, token, name_token, next_token) - self._AddBackTokens(tokens) - return self.GetMethod(FUNCTION_NONE, None) - if token.name == ':': - bases, token = self._GetBases() - - body = None - if token.token_type == tokenize.SYNTAX and token.name == '{': - assert token.token_type == tokenize.SYNTAX, token - assert token.name == '{', token - - ast = AstBuilder(self.GetScope(), self.filename, class_name, - visibility, self.namespace_stack) - body = list(ast.Generate()) - - if not self._handling_typedef: - token = self._GetNextToken() - if token.token_type != tokenize.NAME: - assert token.token_type == tokenize.SYNTAX, token - assert token.name == ';', token - else: - new_class = class_type(class_token.start, class_token.end, - class_name, bases, None, - body, self.namespace_stack) - - modifiers = [] - return self._CreateVariable(class_token, - token.name, new_class, - modifiers, token.name, None) - else: - if not self._handling_typedef: - self.HandleError('non-typedef token', token) - self._AddBackToken(token) - - return class_type(class_token.start, class_token.end, class_name, - bases, None, body, self.namespace_stack) - - def handle_namespace(self): - token = self._GetNextToken() - # Support anonymous namespaces. - name = None - if token.token_type == tokenize.NAME: - name = token.name - token = self._GetNextToken() - self.namespace_stack.append(name) - assert token.token_type == tokenize.SYNTAX, token - if token.name == '=': - # TODO(nnorwitz): handle aliasing namespaces. - name, next_token = self.GetName() - assert next_token.name == ';', next_token - else: - assert token.name == '{', token - tokens = list(self.GetScope()) - del tokens[-1] # Remove trailing '}'. - # Handle namespace with nothing in it. - self._AddBackTokens(tokens) - token = tokenize.Token(_INTERNAL_TOKEN, _NAMESPACE_POP, None, None) - self._AddBackToken(token) - return None - - def handle_using(self): - tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';') - assert tokens - return Using(tokens[0].start, tokens[0].end, tokens) - - def handle_explicit(self): - assert self.in_class - # Nothing much to do. - # TODO(nnorwitz): maybe verify the method name == class name. - # This must be a ctor. - return self.GetMethod(FUNCTION_CTOR, None) - - def handle_this(self): - pass # Nothing to do. - - def handle_operator(self): - # Pull off the next token(s?) and make that part of the method name. - pass - - def handle_sizeof(self): - pass - - def handle_case(self): - pass - - def handle_switch(self): - pass - - def handle_default(self): - token = self._GetNextToken() - assert token.token_type == tokenize.SYNTAX - assert token.name == ':' - - def handle_if(self): - pass - - def handle_else(self): - pass - - def handle_return(self): - tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';') - if not tokens: - return Return(self.current_token.start, self.current_token.end, None) - return Return(tokens[0].start, tokens[0].end, tokens) - - def handle_goto(self): - tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';') - assert len(tokens) == 1, str(tokens) - return Goto(tokens[0].start, tokens[0].end, tokens[0].name) - - def handle_try(self): - pass # Not needed yet. - - def handle_catch(self): - pass # Not needed yet. - - def handle_throw(self): - pass # Not needed yet. - - def handle_while(self): - pass - - def handle_do(self): - pass - - def handle_for(self): - pass - - def handle_break(self): - self._IgnoreUpTo(tokenize.SYNTAX, ';') - - def handle_continue(self): - self._IgnoreUpTo(tokenize.SYNTAX, ';') - - -def BuilderFromSource(source, filename): - """Utility method that returns an AstBuilder from source code. - - Args: - source: 'C++ source code' - filename: 'file1' - - Returns: - AstBuilder - """ - return AstBuilder(tokenize.GetTokens(source), filename) - - -def PrintIndentifiers(filename, should_print): - """Prints all identifiers for a C++ source file. - - Args: - filename: 'file1' - should_print: predicate with signature: bool Function(token) - """ - source = utils.ReadFile(filename, False) - if source is None: - sys.stderr.write('Unable to find: %s\n' % filename) - return - - #print('Processing %s' % actual_filename) - builder = BuilderFromSource(source, filename) - try: - for node in builder.Generate(): - if should_print(node): - print(node.name) - except KeyboardInterrupt: - return - except: - pass - - -def PrintAllIndentifiers(filenames, should_print): - """Prints all identifiers for each C++ source file in filenames. - - Args: - filenames: ['file1', 'file2', ...] - should_print: predicate with signature: bool Function(token) - """ - for path in filenames: - PrintIndentifiers(path, should_print) - - -def main(argv): - for filename in argv[1:]: - source = utils.ReadFile(filename) - if source is None: - continue - - print('Processing %s' % filename) - builder = BuilderFromSource(source, filename) - try: - entire_ast = filter(None, builder.Generate()) - except KeyboardInterrupt: - return - except: - # Already printed a warning, print the traceback and continue. - traceback.print_exc() - else: - if utils.DEBUG: - for ast in entire_ast: - print(ast) - - -if __name__ == '__main__': - main(sys.argv) |