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xo-interpreter2: work on global symtab [WIP]

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This commit is contained in:
Roland Conybeare 2026-02-13 20:46:53 -05:00
commit 8c0bf6a311
1 changed files with 19 additions and 1 deletions
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20
include/xo/expression2/DGlobalSymtab.hpp
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@ -6,6 +6,7 @@
#pragma once
#include "Binding.hpp"
#include <xo/arena/DArenaHashMap.hpp>
namespace xo {
namespace scm {
@ -13,10 +14,21 @@ namespace xo {
/** @class DGlobalSymtab
* @brief symbol table for toplevel environment
*
* We're using DArenaHashMap to store <key,binding> pairs.
* Both of these are outside GC-space, so we don't need collector
* to traverse these.
**/
struct DGlobalSymtab {
class DGlobalSymtab {
public:
using key_type = const DUniqueString *;
using value_type = Binding;
using repr_type = xo::map::DArenaHashMap<key_type, value_type>;
using MemorySizeVisitor = xo::mm::MemorySizeVisitor;
public:
/** visit symtab-owned memory pools; call visitor(info) for each **/
void visit_pools(const MemorySizeVisitor & visitor) const;
public:
/** @defgroup xo-expression2-symboltable-facet symboltable facet**/
@ -31,6 +43,12 @@ namespace xo {
///@}
private:
/** next binding will use this global index. See DGlobalEnv **/
uint32_t next_binding_ix_ = 0;
/** map symbols -> bindings **/
repr_type map_;
};
} /*namespace scm*/