84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/** @file AExpression.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/Expression.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/Expression.json5]
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**/
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#pragma once
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// includes (via {facet_includes})
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#include "TypeRef.hpp"
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#include "exprtype.hpp"
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#include <xo/reflect/TypeDescr.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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// {pretext} here
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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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Representation for executable Schematika expressions
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**/
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class AExpression {
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public:
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/** @defgroup scm-expression-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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/** struct describing a type **/
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using TypeDescr = xo::reflect::TypeDescr;
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///@}
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/** @defgroup scm-expression-methods **/
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///@{
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// const methods
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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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/** expression type (constant | apply | ..) **/
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virtual exprtype extype(Copaque data) const noexcept = 0;
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/** placeholder for type giving possible values for this expression **/
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virtual TypeRef typeref(Copaque data) const noexcept = 0;
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/** type giving possible values for this expression. Maybe null before typecheck **/
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virtual TypeDescr valuetype(Copaque data) const noexcept = 0;
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// nonconst methods
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/** assing to valuetype member. Useful when scaffolding expressions **/
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virtual void assign_valuetype(Opaque data, TypeDescr td) noexcept = 0;
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///@}
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}; /*AExpression*/
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/** Implementation IExpression_DRepr of AExpression 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<AExpression, DRepr> {
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* using Impltype = IExpression_DRepr;
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* };
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*
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* then IExpression_ImplType<DRepr> --> IExpression_DRepr
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**/
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template <typename DRepr>
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using IExpression_ImplType = xo::facet::FacetImplType<AExpression, DRepr>;
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} /*namespace scm*/
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} /*namespace xo*/
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/* AExpression.hpp */
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