gtopt::SolverRegistry class
#include <gtopt/solver_registry.hpp>

Singleton registry for dynamically loaded solver plugins.

Usage:

auto& reg = SolverRegistry::instance();
auto backend = reg.create("highs");  // loads plugin if needed

Public static functions

static auto instance() -> SolverRegistry&: Get the global singleton registry.

auto available_solvers() const -> std::vector<std::string>: List all available solver names across loaded plugins.
auto create(std::string_view solver_name) const -> std::unique_ptr<SolverBackend>: Create a solver backend by name.
auto default_solver() const -> std::string_view: Return the best available solver name by priority.
auto discover_plugins(const std::filesystem::path& dir) -> void: Discover and load all plugins from a directory.
auto has_solver(std::string_view name) const -> bool: Check whether a solver name is available.
auto load_errors() const -> const std::vector<std::string>&: Return diagnostic messages for plugins that failed to load.
auto load_plugin(const std::filesystem::path& path) -> bool: Load a single plugin shared library.
auto operator=(const SolverRegistry&) -> SolverRegistry& deleted
auto operator=(SolverRegistry&&) -> SolverRegistry& deleted
auto searched_directories() const -> const std::vector<std::string>&: Return the directories that were searched for plugins.

Get the global singleton registry.

On first call, automatically discovers plugins from standard paths.

Create a solver backend by name.

Parameters
solver_name	Solver identifier: "clp", "cbc", "cplex", "highs"
Returns	Owning pointer to the created backend
Exceptions
std::runtime_error	if the solver is not available

Return the best available solver name by priority.

Exceptions
std::runtime_error	if no solver plugins are loaded.

Priority order: cplex, highs, cbc, clp.

Discover and load all plugins from a directory.

Scans dir for files matching libgtopt_solver_*.so and loads each. Already-loaded plugins are skipped.

Load a single plugin shared library.

Parameters
path	Full path to the .so file
Returns	true if the plugin was loaded successfully