-- ASDL's 5 builtin types are:

-- identifier, int, string, object, constant

module Python

{

mod = Module(stmt* body, type_ignore* type_ignores)

| Interactive(stmt* body)

| Expression(expr body)

| FunctionType(expr* argtypes, expr returns)

stmt = FunctionDef(identifier name, arguments args,

stmt* body, expr* decorator_list, expr? returns,

string? type_comment)

| AsyncFunctionDef(identifier name, arguments args,

stmt* body, expr* decorator_list, expr? returns,

string? type_comment)

| ClassDef(identifier name,

expr* bases,

keyword* keywords,

stmt* body,

expr* decorator_list)

| Return(expr? value)

| Delete(expr* targets)

| Assign(expr* targets, expr value, string? type_comment)

| AugAssign(expr target, operator op, expr value)

-- 'simple' indicates that we annotate simple name without parens

| AnnAssign(expr target, expr annotation, expr? value, int simple)

-- use 'orelse' because else is a keyword in target languages

| For(expr target, expr iter, stmt* body, stmt* orelse, string? type_comment)

| AsyncFor(expr target, expr iter, stmt* body, stmt* orelse, string? type_comment)

| While(expr test, stmt* body, stmt* orelse)

| If(expr test, stmt* body, stmt* orelse)

| With(withitem* items, stmt* body, string? type_comment)

| AsyncWith(withitem* items, stmt* body, string? type_comment)

| 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

-- col_offset is the byte offset in the utf8 string the parser uses

attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)

-- BoolOp() can use left & right?

expr = BoolOp(boolop op, expr* values)

| NamedExpr(expr target, expr value)

| 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)

| FormattedValue(expr value, int? conversion, expr? format_spec)

| JoinedStr(expr* values)

| Constant(constant value, string? kind)

-- the following expression can appear in assignment context

| Attribute(expr value, identifier attr, expr_context ctx)

| Subscript(expr value, expr 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)

-- can appear only in Subscript

| Slice(expr? lower, expr? upper, expr? step)

-- col_offset is the byte offset in the utf8 string the parser uses

attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)

expr_context = Load | Store | Del

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, int is_async)

excepthandler = ExceptHandler(expr? type, identifier? name, stmt* body)

attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)

arguments = (arg* posonlyargs, arg* args, arg? vararg, arg* kwonlyargs,

expr* kw_defaults, arg? kwarg, expr* defaults)

arg = (identifier arg, expr? annotation, string? type_comment)

attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)

-- keyword arguments supplied to call (NULL identifier for **kwargs)

keyword = (identifier? arg, expr value)

attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)

-- import name with optional 'as' alias.

alias = (identifier name, identifier? asname)

withitem = (expr context_expr, expr? optional_vars)

type_ignore = TypeIgnore(int lineno, string tag)

}