How could it be so confidential when it's the basis for the 'native image' GraalVM. There's also a whole book about it, available for free on the web...

http://www.itu.dk/people/sestoft/pebook/

Maybe you misspelled it, because I get thousands of results on both google and duckduckgo.

Good intro into Futamura projections: https://tomstu.art/compilers-for-free

Futamura projection is an entirely standard concept in staged compilation. The hand-wringing is unwarranted.