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Slight correction, the other compiler/front end writers more or less read the white paper and said "that is what we thought it would be like and thus why we didn't implement it".

Imagine telling your competitors not to copy some feature you have and them listening!

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Yes, it was also where C++26 static reflection was prototyped, as another example of its influence.

One of EDG developers prototyped his idea, and brought it to WG21 when it seemed reflection as originally thought for C++17 was never happening.

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