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xo-expression2 xo-reader2: local symtab stack in PSM

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This commit is contained in:
Roland Conybeare 2026-01-30 10:26:35 -05:00
commit 94efaf46cd
27 changed files with 447 additions and 34 deletions
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11
xo-expression2/include/xo/expression2/DLocalSymtab.hpp
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@ -45,20 +45,23 @@ namespace xo {
/** @defgroup scm-lambdaexpr-constructors **/
///@{
/** empty instance with capacity for n slots.
/** empty instance with parent @p p and capacity for @p n slots.
* Caller must ensure that slots_[0..n) are actually addressable
**/
DLocalSymtab(size_type n);
DLocalSymtab(DLocalSymtab * p, size_type n);
/** scaffold empty symtab instance,
* with capacity for @p n slots, using memory from allocator @p mm
**/
static DLocalSymtab * _make_empty(obj<AAllocator> mm, size_type n);
static DLocalSymtab * _make_empty(obj<AAllocator> mm,
DLocalSymtab * p,
size_type n);
///@}
/** @defgroup scm-lambdaexpr-methods **/
///@{
DLocalSymtab * parent() const noexcept { return parent_; }
size_type capacity() const noexcept { return capacity_; }
size_type size() const noexcept { return size_; }
@ -96,6 +99,8 @@ namespace xo {
///@}
private:
/** parent symbol table from scoping surrounding this one **/
DLocalSymtab * parent_ = nullptr;
/** actual range of slots_[] array. Can use inices in [0,..,n) **/
size_type capacity_ = 0;
/** number of slots in use **/