/usr/lib/nodejs/uglify-js/squeeze-more.js is in node-uglify 1.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | var jsp = require("./parse-js"),
pro = require("./process"),
slice = jsp.slice,
member = jsp.member,
curry = jsp.curry,
MAP = pro.MAP,
PRECEDENCE = jsp.PRECEDENCE,
OPERATORS = jsp.OPERATORS;
function ast_squeeze_more(ast) {
var w = pro.ast_walker(), walk = w.walk, scope;
function with_scope(s, cont) {
var save = scope, ret;
scope = s;
ret = cont();
scope = save;
return ret;
};
function _lambda(name, args, body) {
return [ this[0], name, args, with_scope(body.scope, curry(MAP, body, walk)) ];
};
return w.with_walkers({
"toplevel": function(body) {
return [ this[0], with_scope(this.scope, curry(MAP, body, walk)) ];
},
"function": _lambda,
"defun": _lambda,
"new": function(ctor, args) {
if (ctor[0] == "name") {
if (ctor[1] == "Array" && !scope.has("Array")) {
if (args.length != 1) {
return [ "array", args ];
} else {
return walk([ "call", [ "name", "Array" ], args ]);
}
} else if (ctor[1] == "Object" && !scope.has("Object")) {
if (!args.length) {
return [ "object", [] ];
} else {
return walk([ "call", [ "name", "Object" ], args ]);
}
} else if ((ctor[1] == "RegExp" || ctor[1] == "Function" || ctor[1] == "Error") && !scope.has(ctor[1])) {
return walk([ "call", [ "name", ctor[1] ], args]);
}
}
},
"call": function(expr, args) {
if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
// foo.toString() ==> foo+""
return [ "binary", "+", expr[1], [ "string", "" ]];
}
if (expr[0] == "name") {
if (expr[1] == "Array" && args.length != 1 && !scope.has("Array")) {
return [ "array", args ];
}
if (expr[1] == "Object" && !args.length && !scope.has("Object")) {
return [ "object", [] ];
}
if (expr[1] == "String" && !scope.has("String")) {
return [ "binary", "+", args[0], [ "string", "" ]];
}
}
}
}, function() {
return walk(pro.ast_add_scope(ast));
});
};
exports.ast_squeeze_more = ast_squeeze_more;
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