Aha, the syntax is actually `button <- setSize << 10 << 20;` according to DEMO.C... | Hacker News

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zzrrt 5 months ago | parent | context | favorite | on: Dr. Dobb's Developer Library DVD 6 (2010)

Aha, the syntax is actually `button <- setSize << 10 << 20;` according to DEMO.CPP in /1996/9608/dynacpp.zip of the ISO. So operator-() initializes the Message object, operator<<() stores the parameters into it, which is then passed to operator<() to invoke the function. I guess the HTML page was badly transcribed or failed to escape the characters.

cobbzilla 5 months ago [–]

Yes! The linked article didn’t capture all the symbols in the original DDJ article. There were in fact `<<` preceding each arg. The actual line was:

    obj<-method << arg1 << arg2

which requires overloading the less-than, unary negation, and the double-less-than operators.

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