About 'such that' and 'such as to'

[3doubler]

Dear sir or ma'am,

I have a question about 'such.. that' and 'such.. as to'
As I was informed, 'such.. as to' is a converted version of 'such.. that'. However, I don't understand how this conversion is made.
Please see the below example.

Eating spoiled pizza caused such an indigestion as to make me not be able to sleep.

I wonder which below sentences are same with the above.

Eating spoiled pizza caused such an indigestion that eating makes me not be able to sleep.

Eating spoiled pizza caused such an indigestion that the indigestion makes me not be able to sleep.

[RonPurewal]

What is the original source of this sentence?
Per the forum rules, please provide the original source. Thanks.

[3doubler]

What is the original source of this sentence?
Per the forum rules, please provide the original source. Thanks.

Dear sir,

I made this sentence by myself to understand the concept.
Thanks.

[RonPurewal]

Eating spoiled pizza caused such an indigestion that eating makes me unable to sleep.

The meaning of this sentence is "My indigestion was so bad that, now, eating anything at all will keep me awake." (The blue part discusses just "eating""”i.e., eating in general.)

I changed "not be able" to "unable", since that's the way it would appear in good writing.

Eating spoiled pizza caused such an indigestion that the indigestion makes me not be able to sleep.[/b]

This sentence is redundant.

The point of "such a(n) _____" is to emphasize the "_____", so that there's no need to mention it again"”the entire sentence is already about the "____".

[RonPurewal]

MUCH MORE IMPORTANTLY...
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