roland/xo-reader
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xo-expression2 stack: + dp<> template + robustify DGlobalSymtab

Browse source
This commit is contained in:
Roland Conybeare 2026-02-15 14:12:31 -05:00
commit 3666bf3dd1
2 changed files with 32 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

17
include/xo/expression2/DGlobalSymtab.hpp
View file

@ -8,6 +8,7 @@
#include "Binding.hpp"
#include "DVariable.hpp"
#include <xo/object2/DArray.hpp>
#include <xo/alloc2/dp.hpp>
#include <xo/arena/DArenaHashMap.hpp>
namespace xo {
@ -35,16 +36,16 @@ namespace xo {
/** @defgroup scm-globalsymtab-ctors constructors **/
///@{
DGlobalSymtab(repr_type * map, DArray * vars);
DGlobalSymtab(dp<repr_type> map, DArray * vars);
/** create instance.
* Use memory from @p fixed_mm for @ref map_.
* Use memory from @p mm for DGlobalSymtab instance.
* Hashmap configured per @p cfg.
**/
DGlobalSymtab * make(obj<AAllocator> fixed_mm,
obj<AAllocator> mm,
const ArenaHashMapConfig & cfg);
dp<DGlobalSymtab> make(obj<AAllocator> fixed_mm,
obj<AAllocator> mm,
const ArenaHashMapConfig & cfg);
///@}
/** @defgroup scm-globalsymtab-access-methods access methods **/
@ -81,21 +82,21 @@ namespace xo {
///@}
/** @defgroup scm-globalsymtab-gcobject-facet gcobject facet **/
///@{
std::size_t shallow_size() const noexcept;
DGlobalSymtab * shallow_copy(obj<AAllocator> mm) const noexcept;
std::size_t forward_children(obj<ACollector> gc) noexcept;
///@}
private:
/** map symbols -> bindings.
* Minor point: storing offsets instead of Variables allows us to omit
* iterating over map elements during GC. Possible savings if map_ slots
* sparsely populated.
**/
repr_type * map_ = nullptr;
dp<repr_type> map_;
/** array of variables.
* When S is a unique-string for a global symbol, then:
* 1. map_[S] is unique global index i(S) for S.