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111 lines
4.1 KiB
Text
111 lines
4.1 KiB
Text
-- ASDL's five builtin types are identifier, int, string, object, bool
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module Python version "$Revision$"
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{
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mod = Module(stmt* body)
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| Interactive(stmt* body)
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| Expression(expr body)
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-- not really an actual node but useful in Jython's typesystem.
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| Suite(stmt* body)
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stmt = FunctionDef(identifier name, arguments args,
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stmt* body, expr* decorators)
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| ClassDef(identifier name, expr* bases, stmt* body)
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| Return(expr? value)
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| Delete(expr* targets)
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| Assign(expr* targets, expr value)
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| AugAssign(expr target, operator op, expr value)
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-- not sure if bool is allowed, can always use int
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| Print(expr? dest, expr* values, bool nl)
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-- use 'orelse' because else is a keyword in target languages
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| For(expr target, expr iter, stmt* body, stmt* orelse)
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| While(expr test, stmt* body, stmt* orelse)
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| If(expr test, stmt* body, stmt* orelse)
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| With(expr context_expr, expr? optional_vars, stmt* body)
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-- 'type' is a bad name
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| Raise(expr? type, expr? inst, expr? tback)
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| TryExcept(stmt* body, excepthandler* handlers, stmt* orelse)
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| TryFinally(stmt* body, stmt* finalbody)
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| Assert(expr test, expr? msg)
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| Import(alias* names)
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| ImportFrom(identifier module, alias* names, int? level)
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| Global(identifier* names)
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| Expr(expr value)
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| Pass | Break | Continue
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-- XXX Jython will be different
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-- col_offset is the byte offset in the utf8 string the parser uses
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attributes (int lineno, int col_offset)
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-- BoolOp() can use left & right?
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expr = BoolOp(boolop op, expr* values)
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| BinOp(expr left, operator op, expr right)
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| UnaryOp(unaryop op, expr operand)
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| Lambda(arguments args, expr body)
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| IfExp(expr test, expr body, expr orelse)
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| Dict(expr* keys, expr* values)
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| Set(expr* elts)
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| ListComp(expr elt, comprehension* generators)
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| GeneratorExp(expr elt, comprehension* generators)
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-- the grammar constrains where yield expressions can occur
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| Yield(expr? value)
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-- need sequences for compare to distinguish between
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-- x < 4 < 3 and (x < 4) < 3
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| Compare(expr left, cmpop* ops, expr* comparators)
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| Call(expr func, expr* args, keyword* keywords,
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expr? starargs, expr? kwargs)
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| Num(object n) -- a number as a PyObject.
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| Str(string s) -- need to specify raw, unicode, etc?
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| Ellipsis
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-- other literals? bools?
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-- the following expression can appear in assignment context
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| Attribute(expr value, identifier attr, expr_context ctx)
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| Subscript(expr value, slice slice, expr_context ctx)
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| Name(identifier id, expr_context ctx)
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| List(expr* elts, expr_context ctx)
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| Tuple(expr *elts, expr_context ctx)
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-- col_offset is the byte offset in the utf8 string the parser uses
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attributes (int lineno, int col_offset)
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expr_context = Load | Store | Del | AugLoad | AugStore | Param
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slice = Slice(expr? lower, expr? upper, expr? step)
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| ExtSlice(slice* dims)
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| Index(expr value)
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boolop = And | Or
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operator = Add | Sub | Mult | Div | Mod | Pow | LShift
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| RShift | BitOr | BitXor | BitAnd | FloorDiv
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unaryop = Invert | Not | UAdd | USub
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cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn
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comprehension = (expr target, expr iter, expr* ifs)
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-- not sure what to call the first argument for raise and except
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-- TODO(jhylton): Figure out if there is a better way to handle
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-- lineno and col_offset fields, particularly when
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-- ast is exposed to Python.
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excepthandler = (expr? type, expr? name, stmt* body, int lineno,
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int col_offset)
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arguments = (expr* args, identifier? vararg, expr* kwonlyargs,
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identifier? kwarg, expr* defaults, expr* kw_defaults)
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-- keyword arguments supplied to call
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keyword = (identifier arg, expr value)
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-- import name with optional 'as' alias.
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alias = (identifier name, identifier? asname)
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}
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