89 lines
3 KiB
C++
89 lines
3 KiB
C++
/** @file PrimitiveRegistry.hpp
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*
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* @author Roland Conybeare, Mar 2026
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**/
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#pragma once
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#include "Procedure.hpp"
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#include <xo/alloc2/Allocator.hpp>
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#include <xo/reflect/TypeDescr.hpp>
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#include <functional>
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namespace xo {
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namespace scm {
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/** partition primitives based on scope.
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* Each primitive associates with exactly one flag value.
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* Flags also operate as bitmasks when calling
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* @ref PrimitiveRegistry::install_primitives()
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**/
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enum class InstallFlags {
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f_none = 0x0,
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/** mandatory primitives, necessary for operator support,
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* e.g. _add needed to implement infix +
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**/
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f_essential = 0x1,
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f_generalpurpose = 0x2,
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/** all primitives **/
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f_all = f_essential | f_generalpurpose,
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};
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inline InstallFlags operator&(InstallFlags x, InstallFlags y) {
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return InstallFlags(static_cast<uint64_t>(x) & static_cast<uint64_t>(y));
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}
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/** provided by VSM to receive created primitives.
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* InstallSink(pm) adopts a primitive
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**/
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using InstallSink = std::function<bool (std::string_view name,
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xo::reflect::TypeDescr fn_td,
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obj<AProcedure> pm,
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InstallFlags flags)>;
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/** @class PrimitiveRegistry
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*
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* @brief Runtime registry for primitives
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*
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* Singleton to remember setup code for known primitives.
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* Use to gather primitives for installation in global
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* environment for a virtual schematika machine (VSM)
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**/
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class PrimitiveRegistry {
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public:
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using AAllocator = xo::mm::AAllocator;
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/** provided by a subsystem that provides primitives.
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* Allocates primitives using memory from mm, delivering them
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* to InstallSink sink.
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**/
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using InstallSource = std::function<bool (obj<AAllocator> mm,
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InstallSink sink,
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InstallFlags flags)>;
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public:
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/** singleton instance **/
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static PrimitiveRegistry & instance();
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/** remember primitive-factory @p source_fn **/
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void register_primitives(InstallSource source_fn);
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/** create primitives using memory from @p mm,
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* delivering each primitive to @p sink.
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**/
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bool install_primitives(obj<AAllocator> mm,
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InstallSink sink,
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InstallFlags flags);
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private:
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/** a set of factories that create primitives **/
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std::vector<InstallSource> init_seq_v_;
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};
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} /*namespace scm*/
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} /*namespace xo*/
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/* end PrimitiveRegistry.hpp */
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