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This post was updated on .
Hello,
There's a little improvement for the if-code, which is also used by the supplied compiler, I think:
if (cond)
A
else
B
can be written as
cond
if-goto X
B
goto Y
X:
A
Y:
This saves one line, because we don't have to calculate ~cond. Remark that it is now necessary to write A into a buffer, because we must not write A immediately when we encounter it while parsing. If the if's are nested, we have to use a stacked buffer.
There's also an improvement in handling let-assignments involving arrays.
If you have something like
let a[exp1] = exp2
The supplied compiler saves the value of exp2 in a temp. variable, then assigns pointer 1 and finally that 0;
however you can again save this temp-stuff by writing the exp1 code to a buffer.
startBuffer()
push a
push exp1
add
pop pointer 1
pop that 0
endBuffer()
push exp2
writeBuffer() // writes the stuff inside startBuffer() ... endBuffer()
best regards,
uli
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