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1 package org.python.core;
2
3 public abstract class PyBuiltinFunction extends PyObject implements PyType.Newstyle {
4
5
6
7 public static final String  exposed_name="builtin_function_or_method";
8
9 public static void typeSetup(PyObject dict,PyType.Newstyle marker) {
10 dict.__setitem__("__name__", new PyGetSetDescr("__name__",
11 PyBuiltinFunction.class, "fastGetName", null));
12 dict.__setitem__("__self__", new PyGetSetDescr("__self__",
13 PyBuiltinFunction.class, "getSelf", null));
14 dict.__setitem__("__doc__", new PyGetSetDescr("__doc__",
15 PyBuiltinFunction.class, "fastGetDoc", null));
16 }
17
18 public interface Info {
19 String getName();
20 int getMaxargs();
21 int getMinargs();
22 PyException unexpectedCall(int nargs, boolean keywords);
23 }
24
25 public static class DefaultInfo implements Info {
26
27 public DefaultInfo(String name,int minargs,int maxargs) {
28 this.name = name;
29 this.minargs = minargs;
30 this.maxargs = maxargs;
31 }
32
33 public DefaultInfo(String name,int nargs) {
34 this(name,nargs,nargs);
35 }
36
37 private String name;
38 private int maxargs, minargs;
39
40 public String getName() {
41 return name;
42 }
43
44 public int getMaxargs() {
45 return maxargs;
46 }
47 public int getMinargs() {
48 return minargs;
49 }
50
51 public static boolean check(int nargs,int minargs,int maxargs) {
52 if (nargs < minargs)
53 return false;
54 if (maxargs != -1 && nargs > maxargs)
55 return false;
56 return true;
57 }
58
59 public static PyException unexpectedCall(
60 int nargs,
61 boolean keywords,
62 String name,
63 int minargs,
64 int maxargs) {
65 if (keywords)
66 return Py.TypeError(name + "() takes no keyword arguments");
67 String argsblurb;
68 if (minargs == maxargs) {
69 if (minargs == 0)
70 argsblurb = "no arguments";
71 else if (minargs == 1)
72 argsblurb = "exactly one argument";
73 else
74 argsblurb = minargs + " arguments";
75 } else if (maxargs == -1) {
76 return Py.TypeError(name + "() requires at least " +
77 minargs + " (" + nargs + " given)");
78 } else {
79 if (minargs <= 0)
80 argsblurb = "at most "+ maxargs + " arguments";
81 else
82 argsblurb = minargs + "-" + maxargs + " arguments";
83 }
84
85 return Py.TypeError(
86 name + "() takes " + argsblurb + " (" + nargs + " given)");
87 }
88
89 public PyException unexpectedCall(int nargs, boolean keywords) {
90 return unexpectedCall(nargs, keywords, name, minargs, maxargs);
91 }
92
93 }
94
95 protected PyBuiltinFunction() {}
96
97 protected PyBuiltinFunction(Info info) {
98 this.info = info;
99 }
100
101 protected Info info;
102
103 public void setInfo(Info info) {
104 this.info = info;
105 }
106
107 abstract protected PyBuiltinFunction makeBound(PyObject self);
108
109 public PyObject getSelf() {
110 return null;
111 }
112
113 public String toString() {
114 PyObject self = getSelf();
115 if (self == null)
116 return "<built-in function " + info.getName() + ">";
117 else {
118 String typename = self.getType().fastGetName();
119 return "<built-in method "
120 + info.getName()
121 + " of "
122 + typename
123 + " object>";
124 }
125 }
126
127 abstract public PyObject inst_call(PyObject self);
128 abstract public PyObject inst_call(PyObject self, PyObject arg0);
129 abstract public PyObject inst_call(
130 PyObject self,
131 PyObject arg0,
132 PyObject arg1);
133 abstract public PyObject inst_call(
134 PyObject self,
135 PyObject arg0,
136 PyObject arg1,
137 PyObject arg2);
138 abstract public PyObject inst_call(
139 PyObject self,
140 PyObject arg0,
141 PyObject arg1,
142 PyObject arg2,
143 PyObject arg3);
144 abstract public PyObject inst_call(PyObject self, PyObject[] args);
145 abstract public PyObject inst_call(
146 PyObject self,
147 PyObject[] args,
148 String [] keywords);
149
150 public PyObject fastGetName() {
151 return Py.newString(this.info.getName());
152 }
153
154 public PyObject fastGetDoc() {
155 return Py.None;
156 }
157 }
158 |
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