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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/***********************************************************************
A JavaScript tokenizer / parser / beautifier / compressor.
https://github.com/mishoo/UglifyJS2
-------------------------------- (C) ---------------------------------
Author: Mihai Bazon
<mihai.bazon@gmail.com>
http://mihai.bazon.net/blog
Distributed under the BSD license:
Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the following
disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials
provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
***********************************************************************/
"use strict";
(function(){
var MOZ_TO_ME = {
TryStatement : function(M) {
return new AST_Try({
start : my_start_token(M),
end : my_end_token(M),
body : from_moz(M.block).body,
bcatch : from_moz(M.handlers[0]),
bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
});
},
CatchClause : function(M) {
return new AST_Catch({
start : my_start_token(M),
end : my_start_token(M),
argname : from_moz(M.param),
body : from_moz(M.body).body
});
},
ObjectExpression : function(M) {
return new AST_Object({
start : my_start_token(M),
end : my_end_token(M),
properties : M.properties.map(function(prop){
var key = prop.key;
var name = key.type == "Identifier" ? key.name : key.value;
var args = {
start : my_start_token(key),
end : my_end_token(prop.value),
key : name,
value : from_moz(prop.value)
};
switch (prop.kind) {
case "init":
return new AST_ObjectKeyVal(args);
case "set":
args.value.name = from_moz(key);
return new AST_ObjectSetter(args);
case "get":
args.value.name = from_moz(key);
return new AST_ObjectGetter(args);
}
})
});
},
SequenceExpression : function(M) {
return AST_Seq.from_array(M.expressions.map(from_moz));
},
MemberExpression : function(M) {
return new (M.computed ? AST_Sub : AST_Dot)({
start : my_start_token(M),
end : my_start_token(M),
property : M.computed ? from_moz(M.property) : M.property.name,
expression : from_moz(M.object)
});
},
SwitchCase : function(M) {
return new (M.test ? AST_Case : AST_Default)({
start : my_start_token(M),
end : my_start_token(M),
expression : from_moz(M.test),
body : M.consequent.map(from_moz)
});
},
Literal : function(M) {
var val = M.value, args = {
start : my_start_token(M),
end : my_end_token(M)
};
if (val === null) return new AST_Null(args);
switch (typeof val) {
case "string":
args.value = val;
return new AST_String(args);
case "number":
args.value = val;
return new AST_Number(args);
case "boolean":
return new (val ? AST_True : AST_False)(args);
default:
args.value = val;
return new AST_RegExp(args);
}
},
UnaryExpression: From_Moz_Unary,
UpdateExpression: From_Moz_Unary,
Identifier: function(M) {
var p = FROM_MOZ_STACK[FROM_MOZ_STACK.length - 2];
return new (M.name == "this" ? AST_This
: p.type == "LabeledStatement" ? AST_Label
: p.type == "VariableDeclarator" && p.id === M ? (p.kind == "const" ? AST_SymbolConst : AST_SymbolVar)
: p.type == "FunctionExpression" ? (p.id === M ? AST_SymbolLambda : AST_SymbolFunarg)
: p.type == "FunctionDeclaration" ? (p.id === M ? AST_SymbolDefun : AST_SymbolFunarg)
: p.type == "CatchClause" ? AST_SymbolCatch
: p.type == "BreakStatement" || p.type == "ContinueStatement" ? AST_LabelRef
: AST_SymbolRef)({
start : my_start_token(M),
end : my_end_token(M),
name : M.name
});
}
};
function From_Moz_Unary(M) {
return new (M.prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
start : my_start_token(M),
end : my_end_token(M),
operator : M.operator,
expression : from_moz(M.argument)
})
};
var ME_TO_MOZ = {};
map("Node", AST_Node);
map("Program", AST_Toplevel, "body@body");
map("Function", AST_Function, "id>name, params@argnames, body%body");
map("EmptyStatement", AST_EmptyStatement);
map("BlockStatement", AST_BlockStatement, "body@body");
map("ExpressionStatement", AST_SimpleStatement, "expression>body");
map("IfStatement", AST_If, "test>condition, consequent>body, alternate>alternative");
map("LabeledStatement", AST_LabeledStatement, "label>label, body>body");
map("BreakStatement", AST_Break, "label>label");
map("ContinueStatement", AST_Continue, "label>label");
map("WithStatement", AST_With, "object>expression, body>body");
map("SwitchStatement", AST_Switch, "discriminant>expression, cases@body");
map("ReturnStatement", AST_Return, "argument>value");
map("ThrowStatement", AST_Throw, "argument>value");
map("WhileStatement", AST_While, "test>condition, body>body");
map("DoWhileStatement", AST_Do, "test>condition, body>body");
map("ForStatement", AST_For, "init>init, test>condition, update>step, body>body");
map("ForInStatement", AST_ForIn, "left>init, right>object, body>body");
map("DebuggerStatement", AST_Debugger);
map("FunctionDeclaration", AST_Defun, "id>name, params@argnames, body%body");
map("VariableDeclaration", AST_Var, "declarations@definitions");
map("VariableDeclarator", AST_VarDef, "id>name, init>value");
map("ThisExpression", AST_This);
map("ArrayExpression", AST_Array, "elements@elements");
map("FunctionExpression", AST_Function, "id>name, params@argnames, body%body");
map("BinaryExpression", AST_Binary, "operator=operator, left>left, right>right");
map("AssignmentExpression", AST_Assign, "operator=operator, left>left, right>right");
map("LogicalExpression", AST_Binary, "operator=operator, left>left, right>right");
map("ConditionalExpression", AST_Conditional, "test>condition, consequent>consequent, alternate>alternative");
map("NewExpression", AST_New, "callee>expression, arguments@args");
map("CallExpression", AST_Call, "callee>expression, arguments@args");
/* -----[ tools ]----- */
function my_start_token(moznode) {
return new AST_Token({
file : moznode.loc && moznode.loc.source,
line : moznode.loc && moznode.loc.start.line,
col : moznode.loc && moznode.loc.start.column,
pos : moznode.start,
endpos : moznode.start
});
};
function my_end_token(moznode) {
return new AST_Token({
file : moznode.loc && moznode.loc.source,
line : moznode.loc && moznode.loc.end.line,
col : moznode.loc && moznode.loc.end.column,
pos : moznode.end,
endpos : moznode.end
});
};
function map(moztype, mytype, propmap) {
var moz_to_me = "function From_Moz_" + moztype + "(M){\n";
moz_to_me += "return new mytype({\n" +
"start: my_start_token(M),\n" +
"end: my_end_token(M)";
if (propmap) propmap.split(/\s*,\s*/).forEach(function(prop){
var m = /([a-z0-9$_]+)(=|@|>|%)([a-z0-9$_]+)/i.exec(prop);
if (!m) throw new Error("Can't understand property map: " + prop);
var moz = "M." + m[1], how = m[2], my = m[3];
moz_to_me += ",\n" + my + ": ";
if (how == "@") {
moz_to_me += moz + ".map(from_moz)";
} else if (how == ">") {
moz_to_me += "from_moz(" + moz + ")";
} else if (how == "=") {
moz_to_me += moz;
} else if (how == "%") {
moz_to_me += "from_moz(" + moz + ").body";
} else throw new Error("Can't understand operator in propmap: " + prop);
});
moz_to_me += "\n})}";
// moz_to_me = parse(moz_to_me).print_to_string({ beautify: true });
// console.log(moz_to_me);
moz_to_me = new Function("mytype", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
mytype, my_start_token, my_end_token, from_moz
);
return MOZ_TO_ME[moztype] = moz_to_me;
};
var FROM_MOZ_STACK = null;
function from_moz(node) {
FROM_MOZ_STACK.push(node);
var ret = node != null ? MOZ_TO_ME[node.type](node) : null;
FROM_MOZ_STACK.pop();
return ret;
};
AST_Node.from_mozilla_ast = function(node){
var save_stack = FROM_MOZ_STACK;
FROM_MOZ_STACK = [];
var ast = from_moz(node);
FROM_MOZ_STACK = save_stack;
return ast;
};
})();
|
