18 Aug
2020
18 Aug
'20
3:29 a.m.
On Mon, 17 Aug 2020 at 21:16, Dibyendu Majumdar <mobile(a)majumdar.org.uk> wrote:
Memory can be used for declarations, trees (for
expressions) and
strings as far as I can tell. Strings actually use the tree
allocation, and just pretend that a node is a string.
It seems that tree memory is allocated in a stack discipline. But what
puzzled me is that when a tree starts, about 512 bytes of memory are
left as gap for declarations to use. I have been trying to think in
what circumstances would you encounter a declaration while parsing an
expression - perhaps cast expressions? Anyway - if a declaration
occurs inside an expression (i.e. tree) then it only has 512 bytes
available. Of course this could be made bigger ... but at the least I
would like to have separate heaps for declarations, trees and strings.
Okay it seems those are undefined symbols encountered in an
expression. Symbols use the same allocation function as declarations.
Regards
Dibyendu