Roland Conybeare
dff1b8e6ad
subrepo: subdir: "xo-object2" merged: "8156e514" upstream: origin: "git@github.com:Rconybea/xo-object2.git" branch: "main" commit: "8156e514" git-subrepo: version: "0.4.9" origin: "???" commit: "???"
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/** @file ListOps.hpp
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*
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* @author Roland Conybeare, Jan 2026
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**/
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#pragma once
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#include "List.hpp"
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namespace xo {
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namespace scm {
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/** @brief list functions
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*
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* note: separate from DList, to avoid problems with deps needed
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* to compile functions that return obj<AGCObject,DList>
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**/
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struct ListOps {
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using AGCObject = xo::mm::AGCObject;
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using AAllocator = xo::mm::AAllocator;
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template <typename AConsFacet = AGCObject>
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static obj<AConsFacet,DList> nil();
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/** shortcut for
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* cons(mm, cdr, cdr.data())
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**/
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template <typename AConsFacet = AGCObject, typename ACdrFacet = AGCObject>
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static obj<AConsFacet,DList> cons(obj<AAllocator> mm,
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obj<AGCObject> car,
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obj<ACdrFacet,DList> cdr);
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/** list with one element @p e1, allocated from @p mm **/
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template <typename AListFacet = AGCObject>
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static obj<AListFacet,DList> list(obj<AAllocator> mm,
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obj<AGCObject> e1);
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/** list with two element @p e1, @p e2, allocated from @p mm **/
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template <typename AListFacet = AGCObject>
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static obj<AListFacet,DList> list(obj<AAllocator> mm,
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obj<AGCObject> e1,
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obj<AGCObject> e2);
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};
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template <typename AConsFacet>
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obj<AConsFacet,DList>
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ListOps::nil()
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{
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return obj<AConsFacet,DList>(DList::_nil());
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}
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template <typename AConsFacet, typename ACdrFacet>
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obj<AConsFacet,DList>
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ListOps::cons(obj<AAllocator> mm,
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obj<AGCObject> car,
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obj<ACdrFacet,DList> cdr)
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{
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return obj<AConsFacet,DList>(DList::_cons(mm, car, cdr.data()));
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}
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template <typename AListFacet>
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obj<AListFacet,DList>
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ListOps::list(obj<AAllocator> mm,
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obj<AGCObject> e1)
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{
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// clang 15 doesn't like nil() here.
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return cons(mm, e1, nil());
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}
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template <typename AListFacet>
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obj<AListFacet,DList>
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ListOps::list(obj<AAllocator> mm,
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obj<AGCObject> e1,
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obj<AGCObject> e2)
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{
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return cons(mm, e1, list(mm, e2));
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}
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} /*namespace scm*/
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} /*namespace xo*/
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/* end ListOps.hpp */
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