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Diffstat (limited to 'signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/uglify-js/tmp/instrument.js')
-rw-r--r-- | signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/uglify-js/tmp/instrument.js | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/uglify-js/tmp/instrument.js b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/uglify-js/tmp/instrument.js new file mode 100644 index 0000000..c6a9d79 --- /dev/null +++ b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/uglify-js/tmp/instrument.js @@ -0,0 +1,97 @@ +// sample on how to use the parser and walker API to instrument some code + +var jsp = require("uglify-js").parser; +var pro = require("uglify-js").uglify; + +function instrument(code) { + var ast = jsp.parse(code, false, true); // true for the third arg specifies that we want + // to have start/end tokens embedded in the + // statements + var w = pro.ast_walker(); + + // we're gonna need this to push elements that we're currently looking at, to avoid + // endless recursion. + var analyzing = []; + function do_stat() { + var ret; + if (this[0].start && analyzing.indexOf(this) < 0) { + // without the `analyzing' hack, w.walk(this) would re-enter here leading + // to infinite recursion + analyzing.push(this); + ret = [ "splice", // XXX: "block" is safer + [ [ "stat", + [ "call", [ "name", "trace" ], + [ [ "string", this[0].toString() ], + [ "num", this[0].start.line ], + [ "num", this[0].start.col ], + [ "num", this[0].end.line ], + [ "num", this[0].end.col ]]]], + w.walk(this) ]]; + analyzing.pop(this); + } + return ret; + }; + var new_ast = w.with_walkers({ + "stat" : do_stat, + "label" : do_stat, + "break" : do_stat, + "continue" : do_stat, + "debugger" : do_stat, + "var" : do_stat, + "const" : do_stat, + "return" : do_stat, + "throw" : do_stat, + "try" : do_stat, + "defun" : do_stat, + "if" : do_stat, + "while" : do_stat, + "do" : do_stat, + "for" : do_stat, + "for-in" : do_stat, + "switch" : do_stat, + "with" : do_stat + }, function(){ + return w.walk(ast); + }); + return pro.gen_code(new_ast, { beautify: true }); +} + + + + +////// test code follows. + +var code = instrument(test.toString()); +console.log(code); + +function test() { + // simple stats + a = 5; + c += a + b; + "foo"; + + // var + var foo = 5; + const bar = 6, baz = 7; + + // switch block. note we can't track case lines the same way. + switch ("foo") { + case "foo": + return 1; + case "bar": + return 2; + } + + // for/for in + for (var i = 0; i < 5; ++i) { + console.log("Hello " + i); + } + for (var i in [ 1, 2, 3]) { + console.log(i); + } + + // note however that the following is broken. I guess we + // should add the block brackets in this case... + for (var i = 0; i < 5; ++i) + console.log("foo"); +} |