Roland Conybeare
9eaae04fdf
subrepo: subdir: "xo-interpreter" merged: "047658a5" upstream: origin: "git@github.com:Rconybea/xo-interpreter.git" branch: "main" commit: "047658a5" git-subrepo: version: "0.4.9" origin: "???" commit: "???"
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/** @file ExpressionBoxed.hpp
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*
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* @author Roland Conybeare, Nov 2025
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**/
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#pragma once
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#include "xo/alloc/Object.hpp"
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#include "xo/expression/Expression.hpp"
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namespace xo {
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namespace scm {
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/** @class ExpressionBoxed
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* @brief xo::scm::Expression, adapted to xo::Object interface
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**/
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class ExpressionBoxed : public Object {
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public:
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explicit ExpressionBoxed(bp<Expression> c);
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/** create boxed version of @p c, using allocator @p mm **/
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static gp<ExpressionBoxed> make(gc::IAlloc * mm,
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bp<Expression> c);
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/** runtime downcast **/
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static gp<ExpressionBoxed> from(gp<Object> x) {
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return gp<ExpressionBoxed>::from(x);
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}
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const rp<Expression> & contents() const { return contents_; }
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// inherited from Object
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virtual TaggedPtr self_tp() const final override;
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virtual void display(std::ostream & os) const final override;
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virtual std::size_t _shallow_size() const final override;
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virtual Object * _shallow_copy(gc::IAlloc * mm) const final override;
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virtual std::size_t _forward_children(gc::IAlloc * /*gc*/) final override;
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private:
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/** reference-counted Expression pointer
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*
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* NOTE correctness requires finalization support in xo::gc::GC
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**/
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rp<Expression> contents_;
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};
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} /*namespace scm*/
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} /*namespace xo*/
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/* end ExpressionBoxed.hpp */
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