I think the point was that even if you managed to make a O(n*2) parser it will ve fast enough for human entered problems.

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srean 20 hours ago | parent [-]

Not for C++ code generated by whole program optimizing compilers. Your "human entered" is doing the heavy lifting. Now that AI is writing code your assertion might be on shaky ground.

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simonask 19 hours ago | parent | next [-]

C++ can be slow to compile, but as I said, parsing is not the bottleneck. Even for really huge automatically generated C++ files, or old-school concatenated "unity builds", the parsing step is generally tiny compared to everything else.

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aw1621107 19 hours ago | parent | prev [-]

> Not for C++ code generated by whole program optimizing compilers.

I'd be quite surprised if an optimizing compiler generated C++ code somewhere in its pipeline!

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srean 19 hours ago | parent | next [-]

Take a look at Felix.

https://felix-lang.github.io/felix/

Ignore the 'scripting' language claim.

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aw1621107 19 hours ago | parent [-]

Oh, that is certainly not what I was expecting at all. I stand corrected!

I do have to wonder though - do you know what proportion of the C++ compiler time is spent parsing your generated C++ code vs. optimizing it?

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srean 19 hours ago | parent [-]

Unfortunately no.

Felix is quite old at this point. It's a very interesting language, with many interesting ideas. It did not quite take off though.

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aw1621107 18 hours ago | parent [-]

What favorite feature(s) do you miss when working in other languages?

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srean 18 hours ago | parent [-]

Coroutines, cooperative threading using fibres, type classes, generics, type deduction, easy interface with C++. The functional style, pattern matching. Flow based programming using 'chips and wires' abstraction.

It has many other interesting capabilities, for example, the ability to change its own grammar, that is rather too much, not for a pleb like me. It has unique (linear and affine) types too. It is really quite a handful.

Go did bring coroutines back into limelight but Felix predates Go by a margin.

Skaller, Felix's author, used Felix as a playground for novel language design ideas, so it was always in a state of flux.

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aw1621107 15 hours ago | parent [-]

Huh, that does sound like quite the grab bag of features. Think I'll have to find time to further investigate. Thanks for taking the time to elaborate!

	▲	srean 12 hours ago \| parent [-]
		https://felix-tutorial.readthedocs.io/en/latest/ This would be a good starting point. More in the manual.

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pjmlp 19 hours ago | parent | prev [-]

C++26 reflection?

	▲	aw1621107 19 hours ago \| parent [-]
		Oh, true! That's on me for not being specific enough. I was thinking about the optimization pipeline.