[fpc-devel] Question about Currency support

Sven Barth pascaldragon at googlemail.com
Mon Jun 4 10:22:35 CEST 2012

Am 04.06.2012 08:47 schrieb "Fuxin Zhang" <zhangfx at lemote.com>:
> BTW,
>  for the statement i := j / 10.0, is that in the div node, resultdef
> refers to i, left refers to j, and right refers to 10.0?
>  But for the typeconvnode, what is the result/left/right node?

AFAIK the tree of that statement will be the following:

Left: Loadnode for i
Right: BinaryNode for /:
  Left: Loadnode for j
  Right: Constnode for 10.0
  Resultdef: floatdef (not necessarily the def of i)

If i and the resultdef of the binary node are not the same a typeconvnode
will also be added, where:
Left: the binary node
Right: Nil (AFAIK a typeconvnode doesn't have a right node at all...)
Resultdef: the degree if the target type (here the def if i)

> In general, is there a way for me to learn about the node generating
> process? E.g. add print somewhere to show it? Add in each node seems too
> much...

AFAIK FPC has an option for this. Call the compiler using -h and check the
-v options. One of them should dump the tree to a txt file.

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