mirror of
https://github.com/python/cpython
synced 2024-11-02 11:04:01 +00:00
3e0055f8c6
This change implements a new bytecode compiler, based on a transformation of the parse tree to an abstract syntax defined in Parser/Python.asdl. The compiler implementation is not complete, but it is in stable enough shape to run the entire test suite excepting two disabled tests.
107 lines
3.6 KiB
Text
107 lines
3.6 KiB
Text
-- ASDL's three builtin types are identifier, int, string
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module Python
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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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-- '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)
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-- Doesn't capture requirement that locals must be
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-- defined if globals is
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-- still supports use as a function!
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| Exec(expr body, expr? globals, expr? locals)
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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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attributes (int lineno)
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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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| Dict(expr* keys, expr* values)
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| ListComp(expr elt, comprehension* generators)
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| GeneratorExp(expr elt, comprehension* generators)
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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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| Repr(expr value)
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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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-- 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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attributes (int lineno)
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expr_context = Load | Store | Del | AugLoad | AugStore | Param
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slice = Ellipsis | 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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excepthandler = (expr? type, expr? name, stmt* body)
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arguments = (expr* args, identifier? vararg,
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identifier? kwarg, expr* 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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