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annotate Parser/Python.asdl @ 40894:0ea24f4f2467

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author Thomas Wouters <thomas@python.org>
date Fri, 23 Feb 2007 19:56:57 +0000
parents 32c4897b5d46
children bd1419e94773
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1 -- ASDL's five builtin types are identifier, int, string, object, bool
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2
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3 module Python version "$Revision$"
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4 {
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5 mod = Module(stmt* body)
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6 | Interactive(stmt* body)
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7 | Expression(expr body)
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8
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9 -- not really an actual node but useful in Jython's typesystem.
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10 | Suite(stmt* body)
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11
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12 stmt = FunctionDef(identifier name, arguments args,
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13 stmt* body, expr* decorators, expr? returns)
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14 | ClassDef(identifier name, expr* bases, stmt* body)
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15 | Return(expr? value)
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16
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17 | Delete(expr* targets)
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18 | Assign(expr* targets, expr value)
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19 | AugAssign(expr target, operator op, expr value)
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20
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21 -- use 'orelse' because else is a keyword in target languages
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22 | For(expr target, expr iter, stmt* body, stmt* orelse)
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23 | While(expr test, stmt* body, stmt* orelse)
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24 | If(expr test, stmt* body, stmt* orelse)
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25 | With(expr context_expr, expr? optional_vars, stmt* body)
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26
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27 -- 'type' is a bad name
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28 | Raise(expr? type, expr? inst, expr? tback)
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29 | TryExcept(stmt* body, excepthandler* handlers, stmt* orelse)
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30 | TryFinally(stmt* body, stmt* finalbody)
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31 | Assert(expr test, expr? msg)
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32
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33 | Import(alias* names)
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34 | ImportFrom(identifier module, alias* names, int? level)
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35
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36 | Global(identifier* names)
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37 | Expr(expr value)
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38 | Pass | Break | Continue
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39
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40 -- XXX Jython will be different
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41 -- col_offset is the byte offset in the utf8 string the parser uses
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42 attributes (int lineno, int col_offset)
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43
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44 -- BoolOp() can use left & right?
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45 expr = BoolOp(boolop op, expr* values)
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46 | BinOp(expr left, operator op, expr right)
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47 | UnaryOp(unaryop op, expr operand)
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48 | Lambda(arguments args, expr body)
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49 | IfExp(expr test, expr body, expr orelse)
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50 | Dict(expr* keys, expr* values)
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51 | Set(expr* elts)
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52 | ListComp(expr elt, comprehension* generators)
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53 | GeneratorExp(expr elt, comprehension* generators)
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54 -- the grammar constrains where yield expressions can occur
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55 | Yield(expr? value)
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56 -- need sequences for compare to distinguish between
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57 -- x < 4 < 3 and (x < 4) < 3
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58 | Compare(expr left, cmpop* ops, expr* comparators)
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59 | Call(expr func, expr* args, keyword* keywords,
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60 expr? starargs, expr? kwargs)
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61 | Num(object n) -- a number as a PyObject.
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62 | Str(string s) -- need to specify raw, unicode, etc?
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63 | Bytes(string s)
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64 | Ellipsis
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65 -- other literals? bools?
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66
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67 -- the following expression can appear in assignment context
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68 | Attribute(expr value, identifier attr, expr_context ctx)
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69 | Subscript(expr value, slice slice, expr_context ctx)
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70 | Name(identifier id, expr_context ctx)
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71 | List(expr* elts, expr_context ctx)
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72 | Tuple(expr* elts, expr_context ctx)
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73
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74 -- col_offset is the byte offset in the utf8 string the parser uses
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75 attributes (int lineno, int col_offset)
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76
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77 expr_context = Load | Store | Del | AugLoad | AugStore | Param
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78
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79 slice = Slice(expr? lower, expr? upper, expr? step)
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80 | ExtSlice(slice* dims)
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81 | Index(expr value)
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82
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83 boolop = And | Or
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84
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85 operator = Add | Sub | Mult | Div | Mod | Pow | LShift
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86 | RShift | BitOr | BitXor | BitAnd | FloorDiv
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87
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88 unaryop = Invert | Not | UAdd | USub
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89
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90 cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn
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91
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92 comprehension = (expr target, expr iter, expr* ifs)
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93
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94 -- not sure what to call the first argument for raise and except
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95 -- TODO(jhylton): Figure out if there is a better way to handle
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96 -- lineno and col_offset fields, particularly when
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97 -- ast is exposed to Python.
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98 excepthandler = (expr? type, identifier? name, stmt* body, int lineno,
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99 int col_offset)
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100
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101 arguments = (arg* args, identifier? vararg, expr? varargannotation,
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102 arg* kwonlyargs, identifier? kwarg,
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103 expr? kwargannotation, expr* defaults,
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104 expr* kw_defaults)
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105 arg = SimpleArg(identifier arg, expr? annotation)
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106 | NestedArgs(arg* args)
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107
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108 -- keyword arguments supplied to call
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109 keyword = (identifier arg, expr value)
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110
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111 -- import name with optional 'as' alias.
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112 alias = (identifier name, identifier? asname)
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113 }