/Parser/Python.asdl

  1-- ASDL's five builtin types are identifier, int, string, object, bool
  2
  3module Python version "$Revision: 62047 $"
  4{
  5	mod = Module(stmt* body)
  6	    | Interactive(stmt* body)
  7	    | Expression(expr body)
  8
  9	    -- not really an actual node but useful in Jython's typesystem.
 10	    | Suite(stmt* body)
 11
 12	stmt = FunctionDef(identifier name, arguments args, 
 13                            stmt* body, expr* decorator_list)
 14	      | ClassDef(identifier name, expr* bases, stmt* body, expr *decorator_list)
 15	      | Return(expr? value)
 16
 17	      | Delete(expr* targets)
 18	      | Assign(expr* targets, expr value)
 19	      | AugAssign(expr target, operator op, expr value)
 20
 21	      -- not sure if bool is allowed, can always use int
 22 	      | Print(expr? dest, expr* values, bool nl)
 23
 24	      -- use 'orelse' because else is a keyword in target languages
 25	      | For(expr target, expr iter, stmt* body, stmt* orelse)
 26	      | While(expr test, stmt* body, stmt* orelse)
 27	      | If(expr test, stmt* body, stmt* orelse)
 28	      | With(expr context_expr, expr? optional_vars, stmt* body)
 29
 30	      -- 'type' is a bad name
 31	      | Raise(expr? type, expr? inst, expr? tback)
 32	      | TryExcept(stmt* body, excepthandler* handlers, stmt* orelse)
 33	      | TryFinally(stmt* body, stmt* finalbody)
 34	      | Assert(expr test, expr? msg)
 35
 36	      | Import(alias* names)
 37	      | ImportFrom(identifier module, alias* names, int? level)
 38
 39	      -- Doesn't capture requirement that locals must be
 40	      -- defined if globals is
 41	      -- still supports use as a function!
 42	      | Exec(expr body, expr? globals, expr? locals)
 43
 44	      | Global(identifier* names)
 45	      | Expr(expr value)
 46	      | Pass | Break | Continue
 47
 48	      -- XXX Jython will be different
 49	      -- col_offset is the byte offset in the utf8 string the parser uses
 50	      attributes (int lineno, int col_offset)
 51
 52	      -- BoolOp() can use left & right?
 53	expr = BoolOp(boolop op, expr* values)
 54	     | BinOp(expr left, operator op, expr right)
 55	     | UnaryOp(unaryop op, expr operand)
 56	     | Lambda(arguments args, expr body)
 57	     | IfExp(expr test, expr body, expr orelse)
 58	     | Dict(expr* keys, expr* values)
 59	     | ListComp(expr elt, comprehension* generators)
 60	     | GeneratorExp(expr elt, comprehension* generators)
 61	     -- the grammar constrains where yield expressions can occur
 62	     | Yield(expr? value)
 63	     -- need sequences for compare to distinguish between
 64	     -- x < 4 < 3 and (x < 4) < 3
 65	     | Compare(expr left, cmpop* ops, expr* comparators)
 66	     | Call(expr func, expr* args, keyword* keywords,
 67			 expr? starargs, expr? kwargs)
 68	     | Repr(expr value)
 69	     | Num(object n) -- a number as a PyObject.
 70	     | Str(string s) -- need to specify raw, unicode, etc?
 71	     -- other literals? bools?
 72
 73	     -- the following expression can appear in assignment context
 74	     | Attribute(expr value, identifier attr, expr_context ctx)
 75	     | Subscript(expr value, slice slice, expr_context ctx)
 76	     | Name(identifier id, expr_context ctx)
 77	     | List(expr* elts, expr_context ctx) 
 78	     | Tuple(expr* elts, expr_context ctx)
 79
 80	      -- col_offset is the byte offset in the utf8 string the parser uses
 81	      attributes (int lineno, int col_offset)
 82
 83	expr_context = Load | Store | Del | AugLoad | AugStore | Param
 84
 85	slice = Ellipsis | Slice(expr? lower, expr? upper, expr? step) 
 86	      | ExtSlice(slice* dims) 
 87	      | Index(expr value) 
 88
 89	boolop = And | Or 
 90
 91	operator = Add | Sub | Mult | Div | Mod | Pow | LShift 
 92                 | RShift | BitOr | BitXor | BitAnd | FloorDiv
 93
 94	unaryop = Invert | Not | UAdd | USub
 95
 96	cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn
 97
 98	comprehension = (expr target, expr iter, expr* ifs)
 99
100	-- not sure what to call the first argument for raise and except
101	excepthandler = ExceptHandler(expr? type, expr? name, stmt* body)
102	                attributes (int lineno, int col_offset)
103
104	arguments = (expr* args, identifier? vararg, 
105		     identifier? kwarg, expr* defaults)
106
107        -- keyword arguments supplied to call
108        keyword = (identifier arg, expr value)
109
110        -- import name with optional 'as' alias.
111        alias = (identifier name, identifier? asname)
112}