Add Python 3 ast module; update Python 2.7 ast module; fixup typed_ast (#170)

stdlib/3/ast.pyi

@@ -0,0 +1,42 @@
+# Python 3.5 ast
+
+import typing
+from typing import Any, Union, Iterator
+
+from _ast import (
+    Add, alias, And, arg, arguments, Assert, Assign, AST, AsyncFor,
+    AsyncFunctionDef, AsyncWith, Attribute, AugAssign, AugLoad, AugStore,
+    Await, BinOp, BitAnd, BitOr, BitXor, BoolOp, boolop, Break, Bytes, Call,
+    ClassDef, cmpop, Compare, comprehension, Continue, Del, Delete, Dict,
+    DictComp, Div, Ellipsis, Eq, ExceptHandler, Expr, expr, Expression,
+    expr_context, ExtSlice, FloorDiv, For, FunctionDef, GeneratorExp, Global,
+    Gt, GtE, If, IfExp, Import, ImportFrom, In, Index, Interactive, Invert, Is,
+    IsNot, keyword, Lambda, List, ListComp, Load, LShift, Lt, LtE, MatMult,
+    Mod, mod, Module, Mult, Name, NameConstant, Nonlocal, Not, NotEq, NotIn,
+    Num, operator, Or, Param, Pass, Pow, Raise, Return, RShift, Set, SetComp,
+    Slice, slice, Starred, stmt, Store, Str, Sub, Subscript, Suite, Try, Tuple,
+    UAdd, UnaryOp, unaryop, USub, While, With, withitem, Yield, YieldFrom
+)
+
+class NodeVisitor():
+    __doc__ = ...  # type: str
+    def visit(self, node: AST) -> Any: ...
+    def generic_visit(self, node: AST) -> None: ...
+
+class NodeTransformer(NodeVisitor):
+    __doc__ = ...  # type: str
+    def generic_visit(self, node: AST) -> None: ...
+
+def parse(source: Union[str, bytes], filename: Union[str, bytes] = ..., mode: str = ...) -> AST: ...
+def copy_location(new_node: AST, old_node: AST) -> AST: ...
+def dump(node: AST, annotate_fields: bool = ..., include_attributes: bool = ...) -> str: ...
+def fix_missing_locations(node: AST) -> AST: ...
+def get_docstring(node: AST, clean: bool = ...) -> str: ...
+def increment_lineno(node: AST, n: int = ...) -> AST: ...
+def iter_child_nodes(node: AST) -> Iterator[AST]: ...
+def iter_fields(node: AST) -> Iterator[typing.Tuple[str, Any]]: ...
+def literal_eval(node_or_string: Union[str, AST]) -> Any: ...
+def walk(node: AST) -> Iterator[AST]: ...
+
+PyCF_ONLY_AST = ... # type: int
+