1. The complexity of double pass interpreter

  • Posted by achury Apr 21, 2021
  • 1239 views

I found this text:

https://medium.com/@damitj07/when-in-run-time-is-a-javascript-function-parsed-and-executed-edc9f7c6c0c2

It remembers me that Rob Craig allways said that interpreter must to do a single reading pass on the source file and that procedures must to be declared prior to called. A more flexible programming style involves more complexity layers on the interpreter (and longer execution times)

Marco A

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2. Re: The complexity of double pass interpreter

  • Posted by ChrisB (moderator) Apr 21, 2021
  • 1241 views

Hi

Both Eu and Phix can call procedures and functions declared after being called. It is just habit that I always declare them first. Some other languages require name declaration before use, but then allow the actual function/procedure to be written later on in the program.

Function/procedure namespaces in includes (IMHO) confuse the issue, because, as I see it, Eu has a 'sideways' include system, whereas Phix has a 'flat file' system.

I'm sure that I could write a demo to demonstrate this, but it has been done adequately before elsewhere. There are good reasons for both, I just prefer one.

By the way, I've just solved the SDL2 screenshot method - I'm so proud right now.

Cheers

Chris

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