Roland Conybeare
f7c269a505
1. xo-gc now depends on xo-object2. 2. use genfacet for ICollector_DX1Collector 3. moves xo-gc utest previously in xo-object2 to more natural location in xo-gc/
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/** @file AProcedure.hpp
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*
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* Generated automagically from ingredients:
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* 1. code generator:
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* [xo-facet/codegen/genfacet]
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* arguments:
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* --input [idl/Procedure.json5]
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* 2. jinja2 template for abstract facet .hpp file:
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* [abstract_facet.hpp.j2]
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* 3. idl for facet methods
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* [idl/Procedure.json5]
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**/
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#pragma once
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// includes (via {facet_includes})
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#include "RuntimeContext.hpp"
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#include <xo/alloc2/GCObject.hpp>
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#include <xo/facet/obj.hpp>
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#include <xo/facet/facet_implementation.hpp>
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#include <xo/facet/typeseq.hpp>
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namespace xo { namespace scm { class DArray; } }
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namespace xo {
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namespace scm {
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using Copaque = const void *;
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using Opaque = void *;
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/**
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Abstraction for a schematika procedure
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**/
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class AProcedure {
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public:
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/** @defgroup scm-procedure-type-traits **/
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///@{
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// types
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/** integer identifying a type **/
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using typeseq = xo::facet::typeseq;
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using Copaque = const void *;
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using Opaque = void *;
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/** a gc-aware object **/
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using AGCObject = xo::mm::AGCObject;
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///@}
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/** @defgroup scm-procedure-methods **/
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///@{
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// const methods
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/** An uninitialized AProcedure instance will have zero vtable pointer (per {linux,osx} abi).
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* Use case for this is narrow. We go to some lengths to avoid null vtable pointers. For example
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* obj<AFacet> will have non-null vtable (via IFacet_Any) with all methods terminating.
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**/
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bool _has_null_vptr() const noexcept { return *reinterpret_cast<const void * const *>(this) == nullptr; }
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/** RTTI: unique id# for actual runtime data representation **/
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virtual typeseq _typeseq() const noexcept = 0;
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/** destroy instance @p d; calls c++ dtor only for actual runtime type; does not recover memory **/
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virtual void _drop(Opaque d) const noexcept = 0;
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/** true iff procedure takes n arguments **/
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virtual bool is_nary(Copaque data) const noexcept = 0;
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/** number of arguments. -1 for n-ary **/
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virtual std::int32_t n_args(Copaque data) const noexcept = 0;
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// nonconst methods
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/** invoke procedure; assume arguments satisfy type system **/
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virtual obj<AGCObject> apply_nocheck(Opaque data, obj<ARuntimeContext> rcx, const DArray * args) = 0;
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///@}
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}; /*AProcedure*/
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/** Implementation IProcedure_DRepr of AProcedure for state DRepr
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* should provide a specialization:
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*
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* template <>
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* struct xo::facet::FacetImplementation<AProcedure, DRepr> {
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* using Impltype = IProcedure_DRepr;
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* };
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*
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* then IProcedure_ImplType<DRepr> --> IProcedure_DRepr
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**/
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template <typename DRepr>
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using IProcedure_ImplType = xo::facet::FacetImplType<AProcedure, DRepr>;
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} /*namespace scm*/
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} /*namespace xo*/
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/* AProcedure.hpp */
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