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From: Gordon Smith <gosmith@adobe.com>
To: "flex-dev@incubator.apache.org" <flex-dev@incubator.apache.org>
Date: Fri, 7 Dec 2012 17:40:14 -0800
Subject: New Falcon feature tests
Thread-Topic: New Falcon feature tests
Thread-Index: Ac3U45MvcgOz/PVURXqUO/R9E858kQ==
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Today I added feature tests for the <Object> and <XML> tags. (Each MXML fea=
ture test compiles a tiny MXML app that tests one particular feature, runs =
it in the standalone player, and checks that it ran correctly.)

Most cases of <Object> work, but I discovered something I never knew: The <=
Object> tag doesn't just allow code like

<Object a=3D"1" b=3D"2"/>

or

<Object>
    <a>1</a>
    <b>2</b>
</Object>

or

<Object>
    <a>
        <int>1</int>
    </a>
    <b>
        <int>2</int>
    </b>
</Object>

(which are the three ways to write { a: 1, b: 2 } in MXML), but also allows

<Object> abc </Object>
<Object> 123 </Object/>
etc.

I'll make Falcon support text-inside-Object-tag at some point, but for now =
the behavior of the old compiler when you do this is very quirky in two way=
s: (1) it treats the 123 as a string, not an integer; it trims the whitespa=
ce around the 123 while not around the abc. Maybe we'll fix this in MXML 20=
1X!

The <XML> tag isn't in good shape... even simple examples create a SWF that=
 throws a TypeError at runtime.

To make it easier to fix codegen problems like this, I've made it possible =
to inspect a dump of the generated ABC in the debugger. This is similar to =
how the debugger can show you an entire AST or an entire file scope.

- Gordon

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