ref: 54838652fce0316fa8bd186265be50d3f631b5e4
dir: /sys/src/cmd/python/Parser/Python.asdl/
-- ASDL's five builtin types are identifier, int, string, object, bool module Python version "$Revision: 43614 $" { 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* decorators) | ClassDef(identifier name, expr* bases, stmt* body) | 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) | ListComp(expr elt, 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 -- TODO(jhylton): Figure out if there is a better way to handle -- lineno and col_offset fields, particularly when -- ast is exposed to Python. excepthandler = (expr? type, expr? name, stmt* body, 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) }