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xo-interpreter2 stack: plumbing for aux_mm and use opportunistically

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This commit is contained in:
Roland Conybeare 2026-02-15 14:13:38 -05:00
commit 78f1b8a0b6
8 changed files with 110 additions and 42 deletions
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27
include/xo/reader2/ParserStateMachine.hpp
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@ -41,9 +41,21 @@ namespace xo {
using size_type = std::size_t;
public:
/**
* @p config arena configuration for parser state
* @p max_stringtable_capacity
* hard max size for unique stringtable
* @p expr_alloc allocator for schematika expressions.
* Probably shared with execution.
* @p aux_alloc auxiliary allocator for non-copyable memory
* (e.g. DArenaHashMap for global symtable).
* If not using X1Collector, this can be the
* same as @p expr_alloc.
**/
ParserStateMachine(const ArenaConfig & config,
size_type max_stringtable_capacity,
obj<AAllocator> expr_alloc);
obj<AAllocator> expr_alloc,
obj<AAllocator> aux_alloc);
/** @defgroup scm-parserstatemachine-accessors accessor methods **/
///@{
@ -280,6 +292,19 @@ namespace xo {
**/
obj<AAllocator> expr_alloc_;
/** Allocator for data with lifetime bounded by this ParserStateMachine
*
* Cannot be DX1Collector; for example DArenaHashMap will
* for global symtab will be allocated from here,
* and does not support gc.
*
* If @ref expr_alloc_ is an ordinary arena (e.g. DArenaAlloc)
* can have aux_alloc_ = expr_alloc_.
* When expr_alloc_ is a garbage collector (e.g. DX1Collector)
* this needs to be distinct.
**/
obj<AAllocator> aux_alloc_;
/** symbol table with local bindings.
* non-null during parsing of lambda expressions.
* Always allocated from @p expr_alloc_.