'Didn't find a name for constructor' Error on tags genratation

[Ferroman]

Hi

I have tried to generate the tags using "jsctags ." command in folder with .js files, but I got an error:

$ jsctags .
Didn't find a name for constructor

/usr/local/bin/jsctags:195
                throw e;
                      ^
Error: Didn't find a name for constructor
    at errorWithCode (/usr/local/lib/cfa2/jscfa.js:157:11)
    at Array.toType (/usr/local/lib/cfa2/jscfa.js:1574:11)
    at /usr/local/lib/cfa2/jscfa.js:1994:18
    at Aval.forEachObj (/usr/local/lib/cfa2/jscfa.js:2020:5)
    at Aval.toType (/usr/local/lib/cfa2/jscfa.js:1993:8)
    at funToType (/usr/local/lib/cfa2/jscfa.js:3736:31)
    at getTags (/usr/local/lib/cfa2/jscfa.js:3786:24)
    at Object.interpret (/usr/local/lib/jsctags/ctags/interp.js:54:21)
    at Object.scan (/usr/local/lib/jsctags/ctags/index.js:104:16)
    at processPath (/usr/local/bin/jsctags:189:18)

My system info:

$ echo $NODE_PATH
/usr/local/lib/jsctags/:

$ node --version
v0.6.19

doctorjs$ git log -1
commit 96793072fb43cb0baca6025a187aeaf9f7cdfd79
Author: Dimitris Vardoulakis <[email protected]>
Date:   Sat Apr 14 15:45:09 2012 -0400

    Bugfix for exports in commonJS mode.

[averyvery]

+1

[ilya-biryukov]

I'm having the same problem on current jquery development version after 2(!!) minutes of analysis.
http://code.jquery.com/jquery-1.7.2.js

[marekkalnik]

Same here when trying to run with node 0.8.1 on Modernizr.

[wangyu0248]

yes me too！
jquery-1.7.2.js

[marekkalnik]

I've isolated a code causing the error. The example comes from Modernizr, I've left out everything that didn't change the outcome, so the code doesn't make much sense.

(function( window, document) {
    function isEventSupported( eventName, element ) {
        eventName = 'on' + eventName;
        element = document.createElement('div');
        element[eventName] = undefined;
    }
})(this, this.document);

Hope it will be of any help. I can look into it when I'll have some more time, but I don't know if it will be any time soon.

[fradeve]

same error on OpenLayers.js

echo $NODE_PATH
/usr/local/lib/jsctags/:/usr/local/lib/jsctags/:

node --version
v0.5.10

git log -1
commit 96793072fb43cb0baca6025a187aeaf9f7cdfd79
Author: Dimitris Vardoulakis <[email protected]>
Date:   Sat Apr 14 15:45:09 2012 -0400

[aquillano]

I'm seeing the same error.

[hkrish]

Same with JQuery 1.8.3

[stffrdhrn]

I didnt look too much into it, but I put a patch like this and it seems to work around the issue. The problem seems to be that cfa2 fails when it cant find a proper type, this just returns the default type of "any" instead of backing out with an exception.

This will mean we might lose some type metadata. But me this is better than not getting any ctags.

lib/cfa2/jscfa.js : ~line 1574
 if (types.length === 0)
+      return ("any");
-      throw errorWithCode(CFA_ERROR, "Didn't find a name for constructor");
 normalizeUnionType(types);

[MarcinWieczorek]

Thank you @shinglyu for the patch, it works and should be merged with the master.