Bug 66045 – The code generators behave differently for overloaded and non-overloaded functions

• Component: DOM
• Status: RESOLVED LATER

[Tommy Widenflycht]

Make the code generator for overloaded functions to behave more like non-overloaded functions regarding missing parameters.

If one has just this in the IDL:

TYPE function(in TYPE1 arg1)

the generated code throws a specialized type error "Not enough parameters" if one calls function without any parameters.


If one has this in the IDL:

TYPE function(in TYPE1 arg)
TYPE function(in TYPE2 arg)

and calls function without any parameters the generated code throws just a generic TypeError.

This patch counts the number of mandatory parameters for each overloaded function and if the number of arguments is less than the smallest of them throws the specialized type error, otherwise the generic.

[Tommy Widenflycht]

Created attachment 103600 [details]
Patch

[WebKit Review Bot]

Comment on attachment 103600 [details]
Patch

Attachment 103600 [details] did not pass chromium-ews (chromium-xvfb):
Output: http://queues.webkit.org/results/9352159

New failing tests:
fast/canvas/canvas-overloads-setFillColor.html
fast/canvas/canvas-overloads-setStrokeColor.html
fast/canvas/canvas-overloads-setShadow.html
fast/canvas/canvas-overloads-drawImage.html
fast/canvas/webgl/texImageTest.html

[Adam Barth]

Comment on attachment 103600 [details]
Patch

Looks like landing this patch would cause test failures.  It looks like a good approach, however.

[Tommy Widenflycht]

Do you think I should go ahead with this patch, even though it breaks several tests? (Of course I will fix the tests).

[Adam Barth]

We need to look at how our behavior is changing on those tests and decide whether the new behavior is better or worse than the old behavior.  For example, is our new behavior more or less consistent with the specifications and other browsers?  Is the change likely to cause compatibility problems?

[Philippe Normand]

I skipped fast/files/create-blob-url-crash.html on GTK in http://trac.webkit.org/changeset/95528. It'd be great if the test could be unskipped when this bug is fixed.

[Philippe Normand]

(In reply to comment #6)
> I skipped fast/files/create-blob-url-crash.html on GTK in http://trac.webkit.org/changeset/95528. It'd be great if the test could be unskipped when this bug is fixed.

fast/files/url-required-arguments.html is also affected by this issue... Skipping in GTK like the test above.