How to properly write the addr function?

pik33 · 2022-01-27 21:58

I wanted an integer address instead of a pointer, so I wrote this

function addr(byref v as any)
return(cast(ulong,@v))
end function

It works, but every time it is called, I got a warning:

/home/pik33/Dokumenty/GitHub/P2-retromachine/Propeller/Tracker player/player3.bas:380: warning: incompatible pointer types in parameter passing: expected reference to any unknown type but got reference to string pointer to const byte

ersmith · 2022-01-27 22:24

It looks like the type checking warnings are just a little too aggressive in that case. I'll try to dial them back to accept it without warning. I think what you wrote is correct.

pik33 · 2022-02-02 08:44

Now (5.9.8) these warnings disappeared, but I have another one:

statusline(0)=peek(addr(statusline$(0))+(0+amount/8) mod 220)+$71710000

warning: parameter passing discards const attribute from pointer

ersmith · 2022-02-02 14:53

function addr(byref v as const any)
  return(cast(ulong,@v))
end function

Although honestly, I think you'd be better off using pointers: that way the compiler can help you find potential errors in the code.

pik33 · 2022-02-02 19:02

After adding 'const' to the function header, warnings magically disappeared

How to properly write the addr function?

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