Roland Conybeare
ec639ebb4b
Helps streamline DX1Collector in xo-gc/. Want both forward and verify entry points for the same representation.
64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
/** @file DVsmApplyClosureFrame.hpp
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*
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* @author Roland Conybeare, Feb 2026
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**/
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#pragma once
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#include "VsmInstr.hpp"
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#include "DLocalEnv.hpp"
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#include <xo/expression2/DApplyExpr.hpp>
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namespace xo {
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namespace scm {
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/** Frame to preserve VSM registers:
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* (stack_, parent_, cont_)
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* while applying a closure.
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**/
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class DVsmApplyClosureFrame {
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public:
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using ACollector = xo::mm::ACollector;
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using AGCObject = xo::mm::AGCObject;
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using AGCObjectVisitor = xo::mm::AGCObjectVisitor;
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using VisitReason = xo::mm::VisitReason;
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using AAllocator = xo::mm::AAllocator;
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using ppindentinfo = xo::print::ppindentinfo;
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public:
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DVsmApplyClosureFrame(obj<AGCObject> stack,
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VsmInstr cont,
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DLocalEnv * env);
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/** create instance, using memory from @p mm **/
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static DVsmApplyClosureFrame * make(obj<AAllocator> mm,
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obj<AGCObject> parent,
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VsmInstr cont,
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DLocalEnv * env);
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obj<AGCObject> parent() const { return stack_; }
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VsmInstr cont() const { return cont_; }
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DLocalEnv * local_env() const { return local_env_; }
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/** gcobject facet **/
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std::size_t shallow_size() const noexcept;
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DVsmApplyClosureFrame * gco_shallow_move(obj<AGCObjectVisitor> gc) noexcept;
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void visit_gco_children(VisitReason reason, obj<AGCObjectVisitor> gc) noexcept;
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/** pretty-printing support **/
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bool pretty(const ppindentinfo & ppii) const;
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protected:
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/** saved VSM stack_ register **/
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obj<AGCObject> stack_;
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/** saved VSM cont_ register **/
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VsmInstr cont_;
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/** saved VSM local_env_ register **/
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DLocalEnv * local_env_ = nullptr;
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};
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} /*namespace scm*/
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} /*namespace xo*/
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/* end DVsmApplyClosureFrame.hpp */
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