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multitarget assignments removed

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Irmen de Jong
2019-07-10 09:33:19 +02:00
parent aaaab2cfcf
commit 44fe2369d6
21 changed files with 1020 additions and 1117 deletions
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11
docs/source/syntaxreference.rst
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@@ -444,11 +444,12 @@ Normal subroutines can only return zero or one return values.
However, the special ``asmsub`` routines (implemented in assembly code or referencing
a routine in kernel ROM) can return more than one return values, for instance a status
in the carry bit and a number in A, or a 16-bit value in A/Y registers.
Only for these kind of subroutines it is possible to write a multi value assignment to
store the resulting values::
var1, var2, var3 = asmsubroutine()
It is not possible to process the results of a call to these kind of routines
directly from the language, because only single value assignments are possible.
You can still call the subroutine and not store the results.
But if you want to do something with the values it returns, you'll have to write
a small block of custom inline assembly that does the call and stores the values
appropriately. Don't forget to save/restore the registers if required.
Subroutine definitions