shell_vtable.h

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#pragma once
 
#include <memory>
#include <string>
#include <unordered_map>
 
#include "shell_node.h"
#include "BashSpark/tools/shell_hash.h"
 
namespace bs {
    class shell_node_evaluable;
}
 
namespace bs {
    class shell_vtable {
    public:
        using func_type = shell_node_evaluable;
 
    public:
        shell_vtable() = default;
 
    public:
        [[nodiscard]] const func_type* get_func(const std::string &sVar) const {
            const auto pIter = this->m_mFunctions.find(sVar);
            return pIter != this->m_mFunctions.end() ? pIter->second : nullptr;
        }
 
        void set_func(const std::string& sName, const func_type* pFunction) {
            this->m_mFunctions[sName] =  pFunction;
        }
 
        [[nodiscard]] bool has_func(const std::string &sName) const noexcept {
            return this->m_mFunctions.contains(sName);
        }
 
        [[nodiscard]] std::size_t get_vtable_size() const noexcept {
            return this->m_mFunctions.size();
        }
 
        [[nodiscard]] const std::unordered_map<std::string, const func_type*, shell_hash> &get_env() const noexcept {
            return this->m_mFunctions;
        }
 
    private:
        std::unordered_map<std::string, const func_type*, shell_hash> m_mFunctions;
    };
} // namespace bs