hackedteam/vector-edk

-- ASDL's five builtin types are identifier, int, string, object, bool

module Python version "$Revision$"
{
    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)
          | ClassDef(identifier name, expr* bases, stmt* body, expr* decorator_list)
          | Return(expr? value)

          | Delete(expr* targets)
          | Assign(expr* targets, expr value)
          | AugAssign(expr target, operator op, expr value)

          -- not sure if bool is allowed, can always use int
           | Print(expr? dest, expr* values, bool nl)

          -- use 'orelse' because else is a keyword in target languages
          | For(expr target, expr iter, stmt* body, stmt* orelse)
          | While(expr test, stmt* body, stmt* orelse)
          | If(expr test, stmt* body, stmt* orelse)
          | With(expr context_expr, expr? optional_vars, stmt* body)

          -- 'type' is a bad name
          | Raise(expr? type, expr? inst, expr? tback)
          | TryExcept(stmt* body, excepthandler* handlers, stmt* orelse)
          | TryFinally(stmt* body, stmt* finalbody)
          | Assert(expr test, expr? msg)

          | Import(alias* names)
          | ImportFrom(identifier? module, alias* names, int? level)

          -- Doesn't capture requirement that locals must be
          -- defined if globals is
          -- still supports use as a function!
          | Exec(expr body, expr? globals, expr? locals)

          | Global(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
         | Yield(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,
             expr? starargs, expr? kwargs)
         | Repr(expr value)
         | Num(object n) -- a number as a PyObject.
         | Str(string s) -- need to specify raw, unicode, etc?
         -- other literals? bools?

         -- the following expression can appear in assignment context
         | Attribute(expr value, identifier attr, expr_context ctx)
         | Subscript(expr value, slice slice, 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 = Ellipsis | Slice(expr? lower, expr? upper, expr? step) 
          | ExtSlice(slice* dims) 
          | Index(expr value) 

    boolop = And | Or 

    operator = Add | Sub | Mult | 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)

    -- not sure what to call the first argument for raise and except
    excepthandler = ExceptHandler(expr? type, expr? name, stmt* body)
                    attributes (int lineno, int col_offset)

    arguments = (expr* args, identifier? vararg, 
             identifier? kwarg, expr* defaults)

        -- keyword arguments supplied to call
        keyword = (identifier arg, expr value)

        -- import name with optional 'as' alias.
        alias = (identifier name, identifier? asname)
}