File: builtin_reflect.go

package info (click to toggle)
golang-github-dop251-goja 0.0~git20250630.0.58d95d8-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,264 kB
  • sloc: javascript: 454; perl: 184; makefile: 6; sh: 1
file content (140 lines) | stat: -rw-r--r-- 5,127 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
package goja

func (r *Runtime) builtin_reflect_apply(call FunctionCall) Value {
	return r.toCallable(call.Argument(0))(FunctionCall{
		This:      call.Argument(1),
		Arguments: r.createListFromArrayLike(call.Argument(2))})
}

func (r *Runtime) toConstructor(v Value) func(args []Value, newTarget *Object) *Object {
	if ctor := r.toObject(v).self.assertConstructor(); ctor != nil {
		return ctor
	}
	panic(r.NewTypeError("Value is not a constructor"))
}

func (r *Runtime) builtin_reflect_construct(call FunctionCall) Value {
	target := call.Argument(0)
	ctor := r.toConstructor(target)
	var newTarget Value
	if len(call.Arguments) > 2 {
		newTarget = call.Argument(2)
		r.toConstructor(newTarget)
	} else {
		newTarget = target
	}
	return ctor(r.createListFromArrayLike(call.Argument(1)), r.toObject(newTarget))
}

func (r *Runtime) builtin_reflect_defineProperty(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	key := toPropertyKey(call.Argument(1))
	desc := r.toPropertyDescriptor(call.Argument(2))

	return r.toBoolean(target.defineOwnProperty(key, desc, false))
}

func (r *Runtime) builtin_reflect_deleteProperty(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	key := toPropertyKey(call.Argument(1))

	return r.toBoolean(target.delete(key, false))
}

func (r *Runtime) builtin_reflect_get(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	key := toPropertyKey(call.Argument(1))
	var receiver Value
	if len(call.Arguments) > 2 {
		receiver = call.Arguments[2]
	}
	return target.get(key, receiver)
}

func (r *Runtime) builtin_reflect_getOwnPropertyDescriptor(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	key := toPropertyKey(call.Argument(1))
	return r.valuePropToDescriptorObject(target.getOwnProp(key))
}

func (r *Runtime) builtin_reflect_getPrototypeOf(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	if proto := target.self.proto(); proto != nil {
		return proto
	}

	return _null
}

func (r *Runtime) builtin_reflect_has(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	key := toPropertyKey(call.Argument(1))
	return r.toBoolean(target.hasProperty(key))
}

func (r *Runtime) builtin_reflect_isExtensible(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	return r.toBoolean(target.self.isExtensible())
}

func (r *Runtime) builtin_reflect_ownKeys(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	return r.newArrayValues(target.self.keys(true, nil))
}

func (r *Runtime) builtin_reflect_preventExtensions(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	return r.toBoolean(target.self.preventExtensions(false))
}

func (r *Runtime) builtin_reflect_set(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	var receiver Value
	if len(call.Arguments) >= 4 {
		receiver = call.Argument(3)
	} else {
		receiver = target
	}
	return r.toBoolean(target.set(call.Argument(1), call.Argument(2), receiver, false))
}

func (r *Runtime) builtin_reflect_setPrototypeOf(call FunctionCall) Value {
	target := r.toObject(call.Argument(0))
	var proto *Object
	if arg := call.Argument(1); arg != _null {
		proto = r.toObject(arg)
	}
	return r.toBoolean(target.self.setProto(proto, false))
}

func (r *Runtime) createReflect(val *Object) objectImpl {
	o := newBaseObjectObj(val, r.global.ObjectPrototype, classObject)

	o._putProp("apply", r.newNativeFunc(r.builtin_reflect_apply, "apply", 3), true, false, true)
	o._putProp("construct", r.newNativeFunc(r.builtin_reflect_construct, "construct", 2), true, false, true)
	o._putProp("defineProperty", r.newNativeFunc(r.builtin_reflect_defineProperty, "defineProperty", 3), true, false, true)
	o._putProp("deleteProperty", r.newNativeFunc(r.builtin_reflect_deleteProperty, "deleteProperty", 2), true, false, true)
	o._putProp("get", r.newNativeFunc(r.builtin_reflect_get, "get", 2), true, false, true)
	o._putProp("getOwnPropertyDescriptor", r.newNativeFunc(r.builtin_reflect_getOwnPropertyDescriptor, "getOwnPropertyDescriptor", 2), true, false, true)
	o._putProp("getPrototypeOf", r.newNativeFunc(r.builtin_reflect_getPrototypeOf, "getPrototypeOf", 1), true, false, true)
	o._putProp("has", r.newNativeFunc(r.builtin_reflect_has, "has", 2), true, false, true)
	o._putProp("isExtensible", r.newNativeFunc(r.builtin_reflect_isExtensible, "isExtensible", 1), true, false, true)
	o._putProp("ownKeys", r.newNativeFunc(r.builtin_reflect_ownKeys, "ownKeys", 1), true, false, true)
	o._putProp("preventExtensions", r.newNativeFunc(r.builtin_reflect_preventExtensions, "preventExtensions", 1), true, false, true)
	o._putProp("set", r.newNativeFunc(r.builtin_reflect_set, "set", 3), true, false, true)
	o._putProp("setPrototypeOf", r.newNativeFunc(r.builtin_reflect_setPrototypeOf, "setPrototypeOf", 2), true, false, true)

	o._putSym(SymToStringTag, valueProp(asciiString("Reflect"), false, false, true))

	return o
}

func (r *Runtime) getReflect() *Object {
	ret := r.global.Reflect
	if ret == nil {
		ret = &Object{runtime: r}
		r.global.Reflect = ret
		ret.self = r.createReflect(ret)
	}
	return ret
}