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-- ASDL's 7 builtin types are:-- identifier, int, string, bytes, object, singleton, constant---- singleton: None, True or False-- constant can be None, whereas None means "no value" for object.
module Python{ mod = Module(stmt* body) | Interactive(stmt* body) | Expression(expr body)
-- not really an actual node but useful in Jython's typesystem. | Suite(stmt* body)
stmt = FunctionDef(identifier name, arguments args, stmt* body, expr* decorator_list, expr? returns) | AsyncFunctionDef(identifier name, arguments args, stmt* body, expr* decorator_list, expr? returns)
| ClassDef(identifier name, expr* bases, keyword* keywords, stmt* body, expr* decorator_list) | Return(expr? value)
| Delete(expr* targets) | Assign(expr* targets, expr value) | AugAssign(expr target, operator op, expr value)
-- use 'orelse' because else is a keyword in target languages | For(expr target, expr iter, stmt* body, stmt* orelse) | AsyncFor(expr target, expr iter, stmt* body, stmt* orelse) | While(expr test, stmt* body, stmt* orelse) | If(expr test, stmt* body, stmt* orelse) | With(withitem* items, stmt* body) | AsyncWith(withitem* items, stmt* body)
| Raise(expr? exc, expr? cause) | Try(stmt* body, excepthandler* handlers, stmt* orelse, stmt* finalbody) | Assert(expr test, expr? msg)
| Import(alias* names) | ImportFrom(identifier? module, alias* names, int? level)
| Global(identifier* names) | Nonlocal(identifier* names) | Expr(expr value) | Pass | Break | Continue
-- XXX Jython will be different -- col_offset is the byte offset in the utf8 string the parser uses attributes (int lineno, int col_offset)
-- BoolOp() can use left & right? expr = BoolOp(boolop op, expr* values) | BinOp(expr left, operator op, expr right) | UnaryOp(unaryop op, expr operand) | Lambda(arguments args, expr body) | IfExp(expr test, expr body, expr orelse) | Dict(expr* keys, expr* values) | Set(expr* elts) | ListComp(expr elt, comprehension* generators) | SetComp(expr elt, comprehension* generators) | DictComp(expr key, expr value, comprehension* generators) | GeneratorExp(expr elt, comprehension* generators) -- the grammar constrains where yield expressions can occur | Await(expr value) | Yield(expr? value) | YieldFrom(expr value) -- need sequences for compare to distinguish between -- x < 4 < 3 and (x < 4) < 3 | Compare(expr left, cmpop* ops, expr* comparators) | Call(expr func, expr* args, keyword* keywords) | Num(object n) -- a number as a PyObject. | Str(string s) -- need to specify raw, unicode, etc? | FormattedValue(expr value, int? conversion, expr? format_spec) | JoinedStr(expr* values) | Bytes(bytes s) | NameConstant(singleton value) | Ellipsis | Constant(constant value)
-- the following expression can appear in assignment context | Attribute(expr value, identifier attr, expr_context ctx) | Subscript(expr value, slice slice, expr_context ctx) | Starred(expr value, expr_context ctx) | Name(identifier id, expr_context ctx) | List(expr* elts, expr_context ctx) | Tuple(expr* elts, expr_context ctx)
-- col_offset is the byte offset in the utf8 string the parser uses attributes (int lineno, int col_offset)
expr_context = Load | Store | Del | AugLoad | AugStore | Param
slice = Slice(expr? lower, expr? upper, expr? step) | ExtSlice(slice* dims) | Index(expr value)
boolop = And | Or
operator = Add | Sub | Mult | MatMult | Div | Mod | Pow | LShift | RShift | BitOr | BitXor | BitAnd | FloorDiv
unaryop = Invert | Not | UAdd | USub
cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn
comprehension = (expr target, expr iter, expr* ifs)
excepthandler = ExceptHandler(expr? type, identifier? name, stmt* body) attributes (int lineno, int col_offset)
arguments = (arg* args, arg? vararg, arg* kwonlyargs, expr* kw_defaults, arg? kwarg, expr* defaults)
arg = (identifier arg, expr? annotation) attributes (int lineno, int col_offset)
-- keyword arguments supplied to call (NULL identifier for **kwargs) keyword = (identifier? arg, expr value)
-- import name with optional 'as' alias. alias = (identifier name, identifier? asname)
withitem = (expr context_expr, expr? optional_vars)}
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