Split result into symboltable and types

CMakeLists.txt

@@ -14,16 +14,11 @@ target_include_directories(tester PRIVATE include)
 
 FLEX_TARGET(scanner source/scanner.l ${CMAKE_CURRENT_BINARY_DIR}/scanner.cpp)
 
-add_executable(elnsh shell/main.cpp
-	shell/interactive.cpp include/elna/shell/interactive.hpp
-	shell/history.cpp include/elna/shell/history.hpp
-	shell/state.cpp include/elna/shell/state.hpp
-)
-target_include_directories(elnsh PRIVATE include)
-
 add_executable(elna cli/main.cpp
 	source/lexer.cpp include/elna/source/lexer.hpp
 	source/parser.cpp include/elna/source/parser.hpp
+	source/types.cpp include/elna/source/types.hpp
+	source/symbol_table.cpp include/elna/source/symbol_table.hpp
 	source/result.cpp include/elna/source/result.hpp
 	source/semantic.cpp include/elna/source/semantic.hpp
 	source/optimizer.cpp include/elna/source/optimizer.hpp

TODO

@@ -12,14 +12,5 @@
 - Syscalls.
 - Error message with an empty file wrongly says that a ")" is expected.
 - Support any expressions for constants.
-
+- Built-in types are added in the symbol table constructor. It would be better to
-# Shell
+  add them outside, before the type analysis begins.
-- Replace hard coded ANSI codes with constants or functions.
-
-## Completion
-
-- Configure fzf to show only the current directory files
-- Support multiple selections for insertion in fzf.
-- Don't hardcode fzf binary path.
-- Send the word under the cursor to fzf as initial input.
-- Home directory expansion.

backend/target.cpp

@@ -155,6 +155,7 @@ namespace elna::riscv
 
         writer.set_os_abi(ELFIO::ELFOSABI_NONE);
         writer.set_type(ELFIO::ET_REL);
+        writer.set_flags(0x4); // EF_RISCV_FLOAT_ABI_DOUBLE
         writer.set_machine(ELFIO::EM_RISCV);
 
         // Create code section

include/elna/shell/history.hpp

@@ -1,28 +0,0 @@
-#pragma once
-
-#include <boost/core/noncopyable.hpp>
-#include <string>
-#include <list>
-
-namespace elna
-{
-    struct editor_history : public boost::noncopyable
-    {
-        using const_iterator = std::list<std::string>::const_iterator;
-
-        editor_history();
-
-        void push(const std::string& entry);
-        void clear();
-
-        const_iterator next() noexcept;
-        const_iterator prev() noexcept;
-        const_iterator cbegin() const noexcept;
-        const_iterator cend() const noexcept;
-        const_iterator current() const noexcept;
-
-    private:
-        std::list<std::string> commands;
-        std::list<std::string>::const_iterator current_pointer;
-    };
-}

include/elna/shell/interactive.hpp

@@ -1,89 +0,0 @@
-#pragma once
-
-#include <boost/core/noncopyable.hpp>
-#include <stdexcept>
-#include <string>
-#include <optional>
-
-#include "elna/shell/state.hpp"
-#include "elna/shell/history.hpp"
-
-#define BOOST_PROCESS_USE_STD_FS
-
-namespace elna
-{
-    /**
-     * Runtime exception for non recoverable errors.
-     */
-    struct interactive_exception : public std::runtime_error
-    {
-        /**
-         * Constructor.
-         */
-        interactive_exception();
-    };
-
-    /**
-     * Main loop.
-     */
-    void loop();
-
-    /**
-     * Reads the next line.
-     * Returns no value upon receiving end of file.
-     *
-     * \param history Shell history.
-     * \return The read line.
-     */
-    std::optional<editor_state> read_line(editor_history& history);
-
-    /**
-     * Runs a built-in or a command.
-     *
-     * \param line The command and arguments.
-     * \return Whether the input shoud continued (no exit requested).
-     */
-    bool execute(const std::string& line);
-
-    /**
-     * Runs the binary specified in its argument.
-     *
-     * \param program Program name in PATH.
-     */
-    void launch(const std::string& program);
-
-    /**
-     * Enables the raw mode.
-     *
-     * \return Whether the operation was successful.
-     */
-    bool enable_raw_mode();
-
-    /**
-     * Disables the raw mode.
-     */
-    void disable_raw_mode();
-
-    /**
-     * Reads a key.
-     *
-     * \return Read character.
-     */
-    key read_key();
-
-    /**
-     * Calls autocompletion.
-     *
-     * \param User input.
-     * \param Cursor position in the user input.
-     * \return Selected item.
-     */
-    std::string complete(const std::string& input, const std::size_t position);
-
-    /**
-     * Prints the message from the exception.
-     *
-     * \param exception The exception to print.
-     */
-    void print_exception(const std::exception& exception);
-}

include/elna/shell/state.hpp

@@ -1,170 +0,0 @@
-#include <cstdint>
-#include <cstring>
-#include <string>
-#include <variant>
-
-namespace elna
-{
-    constexpr const char *erase_line = "\x1b[2K";
-    constexpr const char *start_kitty_keybaord = "\x1b[>1u";
-    constexpr const char *end_kitty_keybaord = "\x1b[<u";
-
-    std::string cursor_to_column(const std::uint16_t position = 1);
-
-    enum class special_key
-    {
-        arrow_left,
-        arrow_right,
-        arrow_up,
-        arrow_down,
-        page_up,
-        page_down,
-        home_key,
-        end_key,
-    };
-
-    /**
-     * Key modifiers.
-     */
-    enum class modifier : std::uint8_t
-    {
-        shift = 0b1, ///< 1
-        alt = 0b10, ///< 2
-        ctrl = 0b100, ///< 4
-        super = 0b1000, ///< 8
-        hyper = 0b10000, ///< 16
-        meta = 0b100000, ///< 32
-        caps_lock = 0b1000000, ///< 64
-        num_lock = 0b10000000, ///< 128
-    };
-
-    struct key
-    {
-        using char_t = std::uint32_t;
-
-        key();
-        explicit key(const char_t c, const std::uint8_t modifiers = 0);
-        explicit key(const char_t c, const modifier modifiers);
-        explicit key(const special_key control, const std::uint8_t modifiers = 0);
-        explicit key(const special_key control, const modifier modifiers);
-
-        bool operator==(const char_t c) const;
-        friend bool operator==(const char_t c, const key& that);
-        bool operator==(const special_key control) const;
-        friend bool operator==(const special_key control, const key& that);
-        bool operator==(const key& that) const;
-        bool operator!=(const char_t c) const;
-        friend bool operator!=(const char_t c, const key& that);
-        bool operator!=(const special_key control) const;
-        friend bool operator!=(const special_key control, const key& that);
-        bool operator!=(const key& that) const;
-
-        char_t character() const;
-        special_key control() const;
-        bool modified(const std::uint8_t modifiers) const noexcept;
-        bool modified(const modifier modifiers) const noexcept;
-
-        bool is_character() const noexcept;
-        bool is_control() const noexcept;
-        bool empty() const noexcept;
-
-    private:
-        std::variant<special_key, char_t> store;
-        std::uint8_t modifiers;
-    };
-
-    /**
-     * The action should be performed after updating the editor state.
-     */
-    enum class action
-    {
-        redraw, ///< Redraw everything.
-        write, ///< Write a single character.
-        finalize, ///< Finalize command input.
-        move, ///< Move the cursor.
-        ignore, ///< Do nothing.
-        complete, ///< Complete the input.
-        history, ///< Navigate the history.
-    };
-
-    /**
-     * The line editor with its state.
-     */
-    class editor_state
-    {
-        std::string input;
-        std::string prompt = "> ";
-        std::size_t position{ 1 };
-
-    public:
-        editor_state();
-
-        /**
-         * Returns the current input gathered by the lin editor.
-         *
-         * \return User input.
-         */
-        const std::string& command_line() const noexcept;
-
-        /**
-         * Processes the next keypress by changing the line editor state.
-         *
-         * \param key Pressed key.
-         * \return Action to do after the key was pressed.
-         */
-        action process_keypress(const key& press);
-
-        /**
-         * Clears editors working area and writes drawing sequences into the
-         * buffer.
-         *
-         * \param T Output range for bytes.
-         * \param output Output buffer.
-         */
-        template<typename T>
-        void draw(T output) const
-        {
-            std::string code;
-
-            std::copy(erase_line, erase_line + strlen(erase_line), output);
-
-            code = cursor_to_column();
-            std::copy(std::cbegin(code), std::cend(code), output);
-
-            std::copy(std::cbegin(this->prompt), std::cend(this->prompt), output);
-            std::copy(std::cbegin(this->input), std::cend(this->input), output);
-
-            code = cursor_to_column(absolute_position());
-            std::copy(std::cbegin(code), std::cend(code), output);
-        }
-
-        /**
-         * Computes the position in the terminal line.
-         *
-         * \return Position in the terminal line.
-         */
-        std::size_t absolute_position() const noexcept;
-
-        /**
-         * Cursor position relative to the start of the user input.
-         *
-         * \returns Cursor position.
-         */
-        std::size_t relative_position() const noexcept;
-
-        /**
-         * Inserts text at cursor position.
-         *
-         * \param text Text to insert.
-         */
-        void insert(const std::string& text);
-        void insert(const key::char_t text);
-
-        /**
-         * Replaces the user input with the given string.
-         *
-         * \param text New user input string.
-         */
-        void load(const std::string& text);
-    };
-}

include/elna/source/optimizer.hpp

@@ -1,6 +1,8 @@
 #pragma once
 
+#include <unordered_map>
 #include "elna/source/parser.hpp"
+#include "elna/source/symbol_table.hpp"
 
 namespace elna::source
 {

include/elna/source/result.hpp

@@ -1,15 +1,12 @@
 #pragma once
 
 #include <cstddef>
-#include <cstdint>
 #include <filesystem>
 #include <variant>
 #include <list>
 #include <memory>
 #include <string>
 #include <type_traits>
-#include <unordered_map>
-#include <vector>
 
 namespace elna::source
 {
@@ -126,181 +123,6 @@ namespace elna::source
         std::string what() const override;
     };
 
-    class symbol_table;
-
-    /**
-     * Type representation.
-     */
-    struct type
-    {
-        const std::size_t byte_size;
-
-    protected:
-        explicit type(const std::size_t byte_size);
-    };
-
-    /**
-     * Built-in type representation.
-     */
-    struct primitive_type : public type
-    {
-        const std::string type_name;
-
-        primitive_type(const std::string& type_name, const std::size_t byte_size);
-    };
-
-    /**
-     * Typed pointer.
-     */
-    struct pointer_type : public type
-    {
-        std::shared_ptr<const type> base_type;
-
-        pointer_type(std::shared_ptr<const type> base_type, const std::size_t byte_size);
-    };
-
-    inline const primitive_type boolean_type{ "Boolean", 1 };
-    inline const primitive_type int_type{ "Int", 4 };
-
-    /**
-     * Generic language entity information.
-     */
-    class info
-    {
-    public:
-        virtual ~info() = 0;
-
-    protected:
-        info();
-    };
-
-    /**
-     * Type information.
-     */
-    class type_info final : public info
-    {
-        std::shared_ptr<class type> m_type;
-
-    public:
-        explicit type_info(const class type& type);
-        ~type_info() override;
-        std::shared_ptr<const class type> type() const noexcept;
-    };
-
-    /**
-     * Constant information.
-     */
-    class constant_info final : public info
-    {
-        std::int32_t m_value;
-
-    public:
-        constant_info(const std::int32_t value);
-        ~constant_info() override;
-        std::int32_t value() const noexcept;
-    };
-
-    /**
-     * Variable information.
-     */
-    class variable_info final : public info
-    {
-        std::shared_ptr<const class type> m_type;
-
-    public:
-        std::ptrdiff_t offset{ 0 };
-
-        explicit variable_info(std::shared_ptr<const class type> type);
-        ~variable_info() override;
-        std::shared_ptr<const class type> type() noexcept;
-    };
-
-    /**
-     * Procedure parameter information.
-     */
-    class parameter_info final : public info
-    {
-        std::shared_ptr<const class type> m_type;
-
-    public:
-        std::ptrdiff_t offset{ 0 };
-
-        explicit parameter_info(std::shared_ptr<const class type> type);
-        ~parameter_info() override;
-        std::shared_ptr<const class type> type() const noexcept;
-    };
-
-    /**
-     * Intrinsic and external procedure information.
-     */
-    class intrinsic_info : public info
-    {
-    public:
-        std::vector<parameter_info> parameter_infos;
-
-        ~intrinsic_info() override;
-        std::size_t parameter_stack_size() const noexcept;
-    };
-
-    /**
-     * Procedure information.
-     */
-    class procedure_info final : public intrinsic_info
-    {
-        std::shared_ptr<symbol_table> local_table;
-
-    public:
-        std::size_t local_stack_size{ 0 };
-        std::size_t argument_stack_size{ 0 };
-
-        explicit procedure_info(std::shared_ptr<symbol_table> outer_scope);
-        ~procedure_info() override;
-
-        std::shared_ptr<symbol_table> scope();
-        std::size_t stack_size() const noexcept;
-    };
-
-    /**
-     * Symbol table.
-     */
-    class symbol_table
-    {
-        std::unordered_map<std::string, std::shared_ptr<info>> entries;
-        std::shared_ptr<symbol_table> outer_scope;
-
-    public:
-        /**
-         * Constructs a new symbol with an optional outer scope.
-         *
-         * \param scope Outer scope.
-         */
-        explicit symbol_table(std::shared_ptr<symbol_table> scope = nullptr);
-
-        /**
-         * Looks for symbol in the table by name. Returns nullptr if the symbol
-         * can not be found.
-         *
-         * \param name Symbol name.
-         * \return Symbol from the table if found.
-         */
-        std::shared_ptr<info> lookup(const std::string& name);
-
-        /**
-         * Registers new symbol.
-         *
-         * \param name Symbol name.
-         * \param entry Symbol information.
-         */
-        void enter(const std::string& name, std::shared_ptr<info> entry);
-
-        /**
-         * Returns the outer scope or nullptr if the this is the global scope.
-         *
-         * \return Outer scope.
-         */
-        std::shared_ptr<symbol_table> scope();
-    };
-
     template<typename T>
     struct writer
     {

include/elna/source/semantic.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "elna/source/parser.hpp"
+#include "elna/source/symbol_table.hpp"
 
 namespace elna::source
 {

include/elna/source/symbol_table.hpp

@@ -0,0 +1,151 @@
+#pragma once
+
+#include <cstdint>
+#include <unordered_map>
+#include <string>
+#include <memory>
+#include <vector>
+
+namespace elna::source
+{
+    class symbol_table;
+
+    /**
+     * Generic language entity information.
+     */
+    class info
+    {
+    public:
+        virtual ~info() = 0;
+
+    protected:
+        info();
+    };
+
+    /**
+     * Type information.
+     */
+    class type_info final : public info
+    {
+        std::shared_ptr<class type> m_type;
+
+    public:
+        explicit type_info(const class type& type);
+        ~type_info() override;
+        std::shared_ptr<const class type> type() const noexcept;
+    };
+
+    /**
+     * Constant information.
+     */
+    class constant_info final : public info
+    {
+        std::int32_t m_value;
+
+    public:
+        constant_info(const std::int32_t value);
+        ~constant_info() override;
+        std::int32_t value() const noexcept;
+    };
+
+    /**
+     * Variable information.
+     */
+    class variable_info final : public info
+    {
+        std::shared_ptr<const class type> m_type;
+
+    public:
+        std::ptrdiff_t offset{ 0 };
+
+        explicit variable_info(std::shared_ptr<const class type> type);
+        ~variable_info() override;
+        std::shared_ptr<const class type> type() noexcept;
+    };
+
+    /**
+     * Procedure parameter information.
+     */
+    class parameter_info final : public info
+    {
+        std::shared_ptr<const class type> m_type;
+
+    public:
+        std::ptrdiff_t offset{ 0 };
+
+        explicit parameter_info(std::shared_ptr<const class type> type);
+        ~parameter_info() override;
+        std::shared_ptr<const class type> type() const noexcept;
+    };
+
+    /**
+     * Intrinsic and external procedure information.
+     */
+    class intrinsic_info : public info
+    {
+    public:
+        std::vector<parameter_info> parameter_infos;
+
+        ~intrinsic_info() override;
+        std::size_t parameter_stack_size() const noexcept;
+    };
+
+    /**
+     * Procedure information.
+     */
+    class procedure_info final : public intrinsic_info
+    {
+        std::shared_ptr<symbol_table> local_table;
+
+    public:
+        std::size_t local_stack_size{ 0 };
+        std::size_t argument_stack_size{ 0 };
+
+        explicit procedure_info(std::shared_ptr<symbol_table> outer_scope);
+        ~procedure_info() override;
+
+        std::shared_ptr<symbol_table> scope();
+        std::size_t stack_size() const noexcept;
+    };
+
+    /**
+     * Symbol table.
+     */
+    class symbol_table
+    {
+        std::unordered_map<std::string, std::shared_ptr<info>> entries;
+        std::shared_ptr<symbol_table> outer_scope;
+
+    public:
+        /**
+         * Constructs a new symbol with an optional outer scope.
+         *
+         * \param scope Outer scope.
+         */
+        explicit symbol_table(std::shared_ptr<symbol_table> scope = nullptr);
+
+        /**
+         * Looks for symbol in the table by name. Returns nullptr if the symbol
+         * can not be found.
+         *
+         * \param name Symbol name.
+         * \return Symbol from the table if found.
+         */
+        std::shared_ptr<info> lookup(const std::string& name);
+
+        /**
+         * Registers new symbol.
+         *
+         * \param name Symbol name.
+         * \param entry Symbol information.
+         */
+        void enter(const std::string& name, std::shared_ptr<info> entry);
+
+        /**
+         * Returns the outer scope or nullptr if the this is the global scope.
+         *
+         * \return Outer scope.
+         */
+        std::shared_ptr<symbol_table> scope();
+    };
+}

include/elna/source/types.hpp

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <memory>
+#include <string>
+
+namespace elna::source
+{
+    /**
+     * Type representation.
+     */
+    struct type
+    {
+        const std::size_t byte_size;
+
+    protected:
+        explicit type(const std::size_t byte_size);
+    };
+
+    /**
+     * Built-in type representation.
+     */
+    struct primitive_type : public type
+    {
+        const std::string type_name;
+
+        primitive_type(const std::string& type_name, const std::size_t byte_size);
+    };
+
+    /**
+     * Typed pointer.
+     */
+    struct pointer_type : public type
+    {
+        std::shared_ptr<const type> base_type;
+
+        pointer_type(std::shared_ptr<const type> base_type, const std::size_t byte_size);
+    };
+
+    inline const primitive_type boolean_type{ "Boolean", 1 };
+    inline const primitive_type int_type{ "Int", 4 };
+}

include/elna/tester.hpp

@@ -48,6 +48,7 @@ namespace elna
             boost::asio::readable_pipe& read_pipe);
     test_result run_for_output(boost::asio::io_context& context, const std::uint8_t stream_number,
             const std::filesystem::path& binary, std::initializer_list<boost::string_view> arguments);
+    std::string find_object(const std::vector<std::filesystem::path>& environment, const std::string& object);
     test_result build_test(boost::asio::io_context& context, const std::filesystem::directory_entry& test_entry);
     test_result run_test(boost::asio::io_context& context, const std::filesystem::directory_entry& test_entry);
     void print_result(const std::filesystem::directory_entry& test_entry, const test_result& result);

shell/history.cpp

@@ -1,54 +0,0 @@
-#include "elna/shell/history.hpp"
-
-namespace elna
-{
-    editor_history::editor_history()
-        : commands{}, current_pointer(commands.cend())
-    {
-    }
-
-    void editor_history::push(const std::string& entry)
-    {
-        commands.push_back(entry);
-        current_pointer = commands.cend();
-    }
-
-    void editor_history::clear()
-    {
-        commands.clear();
-        current_pointer = commands.cend();
-    }
-
-    editor_history::const_iterator editor_history::prev() noexcept
-    {
-        if (this->current_pointer != cbegin())
-        {
-            this->current_pointer = std::prev(this->current_pointer);
-        }
-        return this->current_pointer;
-    }
-
-    editor_history::const_iterator editor_history::next() noexcept
-    {
-        if (this->current_pointer != cend())
-        {
-            this->current_pointer = std::next(this->current_pointer);
-        }
-        return this->current_pointer;
-    }
-
-    editor_history::const_iterator editor_history::cbegin() const noexcept
-    {
-        return this->commands.cbegin();
-    }
-
-    editor_history::const_iterator editor_history::cend() const noexcept
-    {
-        return this->commands.cend();
-    }
-
-    editor_history::const_iterator editor_history::current() const noexcept
-    {
-        return this->current_pointer;
-    }
-}

shell/interactive.cpp

@@ -1,286 +0,0 @@
-#include "elna/shell/interactive.hpp"
-
-#include <boost/algorithm/string/predicate.hpp>
-#include <boost/process.hpp>
-#include <termios.h>
-#include <filesystem>
-
-namespace elna
-{
-    static termios original_termios;
-
-    interactive_exception::interactive_exception()
-        : runtime_error("read")
-    {
-    }
-
-    template<typename T>
-    static std::pair<T, unsigned char> read_number()
-    {
-        T position{ 0 };
-        unsigned char c{ 0 };
-
-        while (read(STDIN_FILENO, &c, 1) == 1 && std::isdigit(c))
-        {
-            position = position * 10 + (c - '0');
-        }
-        return std::make_pair(position, c);
-    }
-
-    void loop()
-    {
-        editor_history history;
-        do
-        {
-            auto line = read_line(history);
-
-            if (!line.has_value())
-            {
-                write(STDOUT_FILENO, "\r\n", 2);
-                break;
-            }
-            history.push(line.value().command_line());
-
-            if (!execute(line.value().command_line()))
-            {
-                break;
-            }
-        }
-        while (true);
-    }
-
-    std::optional<editor_state> read_line(editor_history& history)
-    {
-        editor_state state;
-        std::string buffer;
-        std::string saved;
-
-        state.draw(std::back_inserter(buffer));
-        write(STDOUT_FILENO, buffer.data(), buffer.size());
-
-        while (true)
-        {
-            buffer.clear();
-            auto pressed_key = read_key();
-
-            if (pressed_key.empty())
-            {
-                continue;
-            }
-            switch (state.process_keypress(pressed_key))
-            {
-                case action::finalize:
-                    if (pressed_key == key('d', modifier::ctrl))
-                    {
-                        return std::optional<editor_state>();
-                    }
-                    else if (pressed_key == '\r')
-                    {
-                        write(STDOUT_FILENO, "\r\n", 2);
-                        return std::make_optional(state);
-                    }
-                    break;
-                case action::complete:
-                    write(STDOUT_FILENO, "\x1b[1E\x1b[2K", 8);
-                    state.insert(complete(state.command_line(), state.relative_position()));
-                    write(STDOUT_FILENO, "\x1b[1A", 4);
-                    state.draw(std::back_inserter(buffer));
-                    write(STDOUT_FILENO, buffer.data(), buffer.size());
-                    break;
-                case action::redraw:
-                    state.draw(std::back_inserter(buffer));
-                    write(STDOUT_FILENO, buffer.data(), buffer.size());
-                    break;
-                case action::write:
-                    write(STDOUT_FILENO, &pressed_key, 1);
-                    break;
-                case action::move:
-                    buffer = cursor_to_column(state.absolute_position());
-                    write(STDOUT_FILENO, buffer.data(), buffer.size());
-                    break;
-                case action::ignore:
-                    break;
-                case action::history:
-                    editor_history::const_iterator history_iterator = history.cend();
-
-                    if (pressed_key == key(special_key::arrow_up, modifier::ctrl))
-                    {
-                        if (history.current() == history.cend())
-                        {
-                            saved = state.command_line();
-                        }
-                        history_iterator = history.prev();
-                    }
-                    else if (pressed_key == key(special_key::arrow_down, modifier::ctrl))
-                    {
-                        history_iterator = history.next();
-                        if (history_iterator == history.cend())
-                        {
-                            state.load(saved);
-                        }
-                    }
-                    if (history_iterator != history.cend())
-                    {
-                        state.load(*history_iterator);
-                    }
-                    state.draw(std::back_inserter(buffer));
-                    write(STDOUT_FILENO, buffer.data(), buffer.size());
-                    break;
-            }
-        }
-    }
-
-    key read_key()
-    {
-        char c{ 0 };
-
-        if (read(STDIN_FILENO, &c, 1) == -1 && errno != EAGAIN)
-        {
-            throw interactive_exception();
-        }
-        if (c != '\x1b')
-        {
-            return key(c);
-        }
-        if (read(STDIN_FILENO, &c, 1) != 1 || c != '[')
-        {
-            return key();
-        }
-        auto [number, last_char] = read_number<key::char_t>();
-        std::uint8_t modifiers{ 0 };
-
-        if (last_char == ';')
-        {
-            auto modifier_response = read_number<std::uint8_t>();
-            modifiers = modifier_response.first;
-            last_char = modifier_response.second;
-        }
-        if (number == 0 || number == 1)
-        {
-            switch (last_char)
-            {
-                case 'A':
-                    return key(special_key::arrow_up, modifiers);
-                case 'B':
-                    return key(special_key::arrow_down, modifiers);
-                case 'C':
-                    return key(special_key::arrow_right, modifiers);
-                case 'D':
-                    return key(special_key::arrow_left, modifiers);
-                case 'H':
-                    return key(special_key::home_key, modifiers);
-                case 'F':
-                    return key(special_key::end_key, modifiers);
-            }
-        }
-        else if (last_char == '~')
-        {
-            switch (number)
-            {
-                case 5:
-                    return key(special_key::page_up, modifiers);
-                case 6:
-                    return key(special_key::page_up, modifiers);
-                case 7:
-                    return key(special_key::home_key, modifiers);
-                case 8:
-                    return key(special_key::end_key, modifiers);
-            }
-        }
-        else if (last_char == 'u')
-        {
-            return key(number, modifiers);
-        }
-        return key();
-    }
-
-    void print_exception(const std::exception& exception)
-    {
-        std::string message{ exception.what()  };
-        message += "\r\n";
-        write(STDERR_FILENO, message.data(), message.size());
-    }
-
-    bool execute(const std::string& line)
-    {
-        if (line.empty())
-        {
-            return true;
-        }
-        if (line == "exit")
-        {
-            return false;
-        }
-        else if (boost::starts_with(line, "cd "))
-        {
-            try
-            {
-                std::filesystem::current_path(line.substr(strlen("cd ")));
-            }
-            catch (const std::filesystem::filesystem_error& exception)
-            {
-                print_exception(exception);
-            }
-
-            return true;
-        }
-        launch(line);
-        return true;
-    }
-
-    void launch(const std::string& program)
-    {
-        try
-        {
-            boost::process::system(program);
-        }
-        catch (const boost::process::process_error& exception)
-        {
-            print_exception(exception);
-        }
-        enable_raw_mode();
-    }
-
-    bool enable_raw_mode()
-    {
-        if (tcgetattr(STDIN_FILENO, &original_termios) == -1)
-        {
-            return false;
-        }
-        termios raw = original_termios;
-
-        raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
-        raw.c_oflag &= ~(OPOST);
-        raw.c_cflag |= CS8;
-        raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
-
-        write(STDOUT_FILENO, start_kitty_keybaord, strlen(start_kitty_keybaord));
-
-        return tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) != -1;
-    }
-
-    void disable_raw_mode()
-    {
-        write(STDOUT_FILENO, end_kitty_keybaord, strlen(end_kitty_keybaord));
-        tcsetattr(STDIN_FILENO, TCSAFLUSH, &original_termios);
-    }
-
-    std::string complete(const std::string& input, const std::size_t position)
-    {
-        std::filesystem::path program = boost::process::search_path("fzf");
-
-        if (program.empty())
-        {
-            return "";
-        }
-        boost::process::ipstream output;
-        boost::process::system(program,
-                "--height=10", "--layout=reverse", "-1", "--no-multi",
-                boost::process::std_out > output);
-
-        std::string selections;
-        std::getline(output, selections, '\n');
-
-        return selections;
-    }
-}

shell/main.cpp

@@ -1,16 +0,0 @@
-#include <cstdlib>
-#include <unistd.h>
-#include "elna/shell/interactive.hpp"
-
-int main()
-{
-    if (!elna::enable_raw_mode())
-    {
-        std::perror("tcsetattr");
-        return EXIT_FAILURE;
-    }
-    std::atexit(elna::disable_raw_mode);
-    elna::loop();
-
-    return EXIT_SUCCESS;
-}

shell/state.cpp

@@ -1,254 +0,0 @@
-#include <algorithm>
-#include <boost/endian.hpp>
-
-#include "elna/shell/state.hpp"
-
-namespace elna
-{
-    std::string cursor_to_column(const std::uint16_t position)
-    {
-        std::string code = std::to_string(position);
-        code.insert(0, "\x1b[");
-        code.push_back('G');
-
-        return code;
-    }
-
-    key::key()
-        : store(0x1bu)
-    {
-    }
-
-    key::key(const char_t c, const std::uint8_t modifiers)
-        : store(c), modifiers(modifiers == 0 ? 0 : modifiers - 1)
-    {
-    }
-
-    key::key(const char_t c, const modifier modifiers)
-        : store(c), modifiers(static_cast<uint8_t>(modifiers))
-    {
-    }
-
-    key::key(const special_key control, const std::uint8_t modifiers)
-        : store(control), modifiers(modifiers == 0 ? 0 : modifiers - 1)
-    {
-    }
-
-    key::key(const special_key control, const modifier modifiers)
-        : store(control), modifiers(static_cast<uint8_t>(modifiers))
-    {
-    }
-
-    key::char_t key::character() const
-    {
-        return std::get<char_t>(this->store);
-    }
-
-    special_key key::control() const
-    {
-        return std::get<special_key>(this->store);
-    }
-
-    bool key::modified(const std::uint8_t modifiers) const noexcept
-    {
-        return this->modifiers == modifiers;
-    }
-
-    bool key::modified(const modifier modifiers) const noexcept
-    {
-        return this->modifiers == static_cast<std::uint8_t>(modifiers);
-    }
-
-    bool key::operator==(const char_t c) const
-    {
-        return std::holds_alternative<char_t>(this->store)
-            && std::get<char_t>(this->store) == c;
-    }
-
-    bool key::operator==(const special_key control) const
-    {
-        return std::holds_alternative<special_key>(this->store)
-            && std::get<special_key>(this->store) == control;
-    }
-
-    bool key::operator==(const key& that) const
-    {
-        return this->store == that.store;
-    }
-
-    bool key::operator!=(const char_t c) const
-    {
-        return !(*this == c);
-    }
-
-    bool key::operator!=(const special_key control) const
-    {
-        return !(*this == control);
-    }
-
-    bool key::operator!=(const key& that) const
-    {
-        return !(*this == that);
-    }
-
-    bool key::is_character() const noexcept
-    {
-        return std::holds_alternative<char_t>(this->store);
-    }
-
-    bool key::is_control() const noexcept
-    {
-        return std::holds_alternative<special_key>(this->store);
-    }
-
-    bool key::empty() const noexcept
-    {
-        return *this == '\x1b';
-    }
-
-    bool operator==(const special_key control, const key& that)
-    {
-        return that == control;
-    }
-
-    bool operator==(const char c, const key& that)
-    {
-        return that == c;
-    }
-
-    bool operator!=(const special_key control, const key& that)
-    {
-        return that != control;
-    }
-
-    bool operator!=(const char c, const key& that)
-    {
-        return that != c;
-    }
-
-    editor_state::editor_state()
-    {
-        this->input.reserve(1024);
-    }
-
-    void editor_state::load(const std::string& text)
-    {
-        this->input = text;
-        this->position = this->input.size() + 1;
-    }
-
-    const std::string& editor_state::command_line() const noexcept
-    {
-        return this->input;
-    }
-
-    std::size_t editor_state::absolute_position() const noexcept
-    {
-        return this->prompt.size() + this->position;
-    }
-
-    std::size_t editor_state::relative_position() const noexcept
-    {
-        return this->position;
-    }
-
-    void editor_state::insert(const std::string& text)
-    {
-        this->input.insert(this->position - 1, text);
-        this->position += text.size();
-    }
-
-    void editor_state::insert(const key::char_t text)
-    {
-        if (text == 0u)
-        {
-            this->input.insert(this->position - 1, '\0', 1);
-            ++this->position;
-            return;
-        }
-        key::char_t buffer = boost::endian::native_to_big<key::char_t>(text);
-
-        const char *begin = reinterpret_cast<char *>(&buffer);
-        const char *end = begin + sizeof(key::char_t);
-        const char *significant = std::find_if(begin, end,
-                [](const char byte) {
-                    return byte != 0;
-                });
-
-        this->input.insert(this->position - 1, significant, end - significant);
-        this->position += end - significant;
-    }
-
-    action editor_state::process_keypress(const key& press)
-    {
-        if (press.is_control())
-        {
-            switch (press.control())
-            {
-                case special_key::arrow_left:
-                    if (this->position > 1)
-                    {
-                        --this->position;
-                    }
-                    return action::move;
-                case special_key::arrow_right:
-                    if (this->position + 1 < this->input.size() + this->prompt.size())
-                    {
-                        ++this->position;
-                    }
-                    return action::move;
-                case special_key::arrow_up:
-                case special_key::arrow_down:
-                    return action::history;
-                case special_key::home_key:
-                    this->position = 1;
-                    return action::move;
-                case special_key::end_key:
-                    this->position = this->input.size() + 1;
-                    return action::move;
-                default:
-                    return action::ignore;
-            }
-        }
-        else if (press.modified(modifier::ctrl))
-        {
-            switch (press.character())
-            {
-                case 'd':
-                    return action::finalize;
-                case 't':
-                    return action::complete;
-                default:
-                    return action::ignore;
-            }
-        }
-        else
-        {
-            switch (press.character())
-            {
-                case 127: // Backspace.
-                    if (this->position <= this->input.size() + 1 && this->position > 1)
-                    {
-                        --this->position;
-                        this->input.erase(this->position - 1, 1);
-                    }
-                    return action::redraw;
-                case 9: // Tab.
-                    return action::complete;
-                case '\r':
-                    return action::finalize;
-                default:
-                    if (this->position - 1 < input.size())
-                    {
-                        insert(press.character());
-                        return action::redraw;
-                    }
-                    else
-                    {
-                        insert(press.character());
-                        return action::write;
-                    }
-            }
-        }
-    }
-}

source/result.cpp

@@ -1,4 +1,5 @@
 #include "elna/source/result.hpp"
+#include "elna/source/types.hpp"
 
 namespace elna::source
 {
@@ -32,156 +33,4 @@ namespace elna::source
     {
         return "Name '" + name + "' was already defined";
     }
-
-    type::type(const std::size_t byte_size)
-        : byte_size(byte_size)
-    {
-    }
-
-    primitive_type::primitive_type(const std::string& type_name, const std::size_t byte_size)
-        : type(byte_size), type_name(type_name)
-   {
-   }
-
-    pointer_type::pointer_type(std::shared_ptr<const type> base_type, const std::size_t byte_size)
-        : type(byte_size), base_type(base_type)
-    {
-    }
-
-    symbol_table::symbol_table(std::shared_ptr<symbol_table> scope)
-        : outer_scope(scope)
-    {
-        if (scope == nullptr)
-        {
-            auto boolean_info = std::make_shared<type_info>(boolean_type);
-            auto int_info = std::make_shared<type_info>(int_type);
-            enter("Boolean", boolean_info);
-            enter("Int", int_info);
-
-            auto writei = std::make_shared<intrinsic_info>();
-            writei->parameter_infos.emplace_back(int_info->type());
-            enter("writei", writei);
-
-            auto writeb = std::make_shared<intrinsic_info>();
-            writeb->parameter_infos.emplace_back(boolean_info->type());
-            enter("writeb", writeb);
-        }
-    }
-
-    std::shared_ptr<info> symbol_table::lookup(const std::string& name)
-    {
-        auto entry = entries.find(name);
-
-        if (entry != entries.cend())
-        {
-            return entry->second;
-        }
-        if (this->outer_scope != nullptr)
-        {
-            return this->outer_scope->lookup(name);
-        }
-        return nullptr;
-    }
-
-    void symbol_table::enter(const std::string& name, std::shared_ptr<info> entry)
-    {
-        entries.insert_or_assign(name, entry);
-    }
-
-    std::shared_ptr<symbol_table> symbol_table::scope()
-    {
-        return this->outer_scope;
-    }
-
-    info::~info()
-    {
-    }
-
-    info::info()
-    {
-    }
-
-    type_info::type_info(const class type& type)
-        : info(), m_type(std::make_shared<class type>(type))
-    {
-    }
-
-    type_info::~type_info()
-    {
-    }
-
-    std::shared_ptr<const class type> type_info::type() const noexcept
-    {
-        return m_type;
-    }
-
-    constant_info::constant_info(const std::int32_t value)
-        : m_value(value)
-    {
-    }
-
-    constant_info::~constant_info()
-    {
-    }
-
-    std::int32_t constant_info::value() const noexcept
-    {
-        return m_value;
-    }
-
-    variable_info::variable_info(std::shared_ptr<const class type> type)
-        : m_type(type)
-    {
-    }
-
-    variable_info::~variable_info()
-    {
-    }
-
-    std::shared_ptr<const class type> variable_info::type() noexcept
-    {
-        return m_type;
-    }
-
-    parameter_info::parameter_info(std::shared_ptr<const class type> type)
-        : m_type(type)
-    {
-    }
-
-    parameter_info::~parameter_info()
-    {
-    }
-
-    std::shared_ptr<const class type> parameter_info::type() const noexcept
-    {
-        return m_type;
-    }
-
-    intrinsic_info::~intrinsic_info()
-    {
-    }
-
-    std::size_t intrinsic_info::parameter_stack_size() const noexcept
-    {
-        return this->parameter_infos.size() * sizeof(std::int32_t);
-    }
-
-    procedure_info::procedure_info(std::shared_ptr<symbol_table> outer_scope)
-        : local_table(std::make_shared<symbol_table>(outer_scope))
-    {
-    }
-
-    procedure_info::~procedure_info()
-    {
-    }
-
-    std::shared_ptr<symbol_table> procedure_info::scope()
-    {
-        return local_table;
-    }
-
-    std::size_t procedure_info::stack_size() const noexcept
-    {
-        return local_stack_size + argument_stack_size;
-    }
 }

source/semantic.cpp

@@ -1,5 +1,5 @@
 #include "elna/source/semantic.hpp"
-#include "elna/source/result.hpp"
+#include "elna/source/types.hpp"
 #include <cstdlib>
 
 namespace elna::source

source/symbol_table.cpp

@@ -0,0 +1,142 @@
+#include "elna/source/types.hpp"
+#include "elna/source/symbol_table.hpp"
+
+namespace elna::source
+{
+    symbol_table::symbol_table(std::shared_ptr<symbol_table> scope)
+        : outer_scope(scope)
+    {
+        if (scope == nullptr)
+        {
+            auto boolean_info = std::make_shared<type_info>(boolean_type);
+            auto int_info = std::make_shared<type_info>(int_type);
+            enter("Boolean", boolean_info);
+            enter("Int", int_info);
+
+            auto writei = std::make_shared<intrinsic_info>();
+            writei->parameter_infos.emplace_back(int_info->type());
+            enter("writei", writei);
+
+            auto writeb = std::make_shared<intrinsic_info>();
+            writeb->parameter_infos.emplace_back(boolean_info->type());
+            enter("writeb", writeb);
+        }
+    }
+
+    std::shared_ptr<info> symbol_table::lookup(const std::string& name)
+    {
+        auto entry = entries.find(name);
+
+        if (entry != entries.cend())
+        {
+            return entry->second;
+        }
+        if (this->outer_scope != nullptr)
+        {
+            return this->outer_scope->lookup(name);
+        }
+        return nullptr;
+    }
+
+    void symbol_table::enter(const std::string& name, std::shared_ptr<info> entry)
+    {
+        entries.insert_or_assign(name, entry);
+    }
+
+    std::shared_ptr<symbol_table> symbol_table::scope()
+    {
+        return this->outer_scope;
+    }
+
+    info::~info()
+    {
+    }
+
+    info::info()
+    {
+    }
+
+    type_info::type_info(const class type& type)
+        : info(), m_type(std::make_shared<class type>(type))
+    {
+    }
+
+    type_info::~type_info()
+    {
+    }
+
+    std::shared_ptr<const class type> type_info::type() const noexcept
+    {
+        return m_type;
+    }
+
+    constant_info::constant_info(const std::int32_t value)
+        : m_value(value)
+    {
+    }
+
+    constant_info::~constant_info()
+    {
+    }
+
+    std::int32_t constant_info::value() const noexcept
+    {
+        return m_value;
+    }
+
+    variable_info::variable_info(std::shared_ptr<const class type> type)
+        : m_type(type)
+    {
+    }
+
+    variable_info::~variable_info()
+    {
+    }
+
+    std::shared_ptr<const class type> variable_info::type() noexcept
+    {
+        return m_type;
+    }
+
+    parameter_info::parameter_info(std::shared_ptr<const class type> type)
+        : m_type(type)
+    {
+    }
+
+    parameter_info::~parameter_info()
+    {
+    }
+
+    std::shared_ptr<const class type> parameter_info::type() const noexcept
+    {
+        return m_type;
+    }
+
+    intrinsic_info::~intrinsic_info()
+    {
+    }
+
+    std::size_t intrinsic_info::parameter_stack_size() const noexcept
+    {
+        return this->parameter_infos.size() * sizeof(std::int32_t);
+    }
+
+    procedure_info::procedure_info(std::shared_ptr<symbol_table> outer_scope)
+        : local_table(std::make_shared<symbol_table>(outer_scope))
+    {
+    }
+
+    procedure_info::~procedure_info()
+    {
+    }
+
+    std::shared_ptr<symbol_table> procedure_info::scope()
+    {
+        return local_table;
+    }
+
+    std::size_t procedure_info::stack_size() const noexcept
+    {
+        return local_stack_size + argument_stack_size;
+    }
+}

source/types.cpp

@@ -0,0 +1,19 @@
+#include <elna/source/types.hpp>
+
+namespace elna::source
+{
+    type::type(const std::size_t byte_size)
+        : byte_size(byte_size)
+    {
+    }
+
+    primitive_type::primitive_type(const std::string& type_name, const std::size_t byte_size)
+        : type(byte_size), type_name(type_name)
+   {
+   }
+
+    pointer_type::pointer_type(std::shared_ptr<const type> base_type, const std::size_t byte_size)
+        : type(byte_size), base_type(base_type)
+    {
+    }
+}

tests/tester.cpp

@@ -1,6 +1,8 @@
 #include "elna/tester.hpp"
 
 #include <iostream>
+#include <algorithm>
+#include <boost/process/env.hpp>
 
 namespace elna
 {
@@ -88,6 +90,22 @@ namespace elna
         return result;
     }
 
+    std::string find_object(const std::vector<std::filesystem::path>& environment, const std::string& object)
+    {
+        auto variable = std::find(environment.cbegin(), environment.cend(), object);
+
+        for (const auto& variable : environment)
+        {
+            auto full_path = variable / object;
+
+            if (std::filesystem::exists(full_path))
+            {
+                return full_path.native();
+            }
+        }
+        return object;
+    }
+
     test_result build_test(boost::asio::io_context& context, const std::filesystem::directory_entry& test_entry)
     {
         const std::filesystem::path test_filename = test_entry.path().filename();
@@ -108,18 +126,24 @@ namespace elna
             result.status = test_status::compile_failed;
             return result;
         }
-        boost::process::v2::execute(boost::process::v2::process(
+        std::vector<std::filesystem::path> environment;
-                    context, "/opt/riscv/bin/riscv32-unknown-elf-ld",
+        std::vector<std::string> linker_arguments = { "-o", test_binary.string() };
-                    {
+
-                        "-o", test_binary.string(),
+        for (const auto segment : boost::this_process::environment()["LIBRARY_PATH"].to_vector())
-                        "-L/opt/riscv/lib/gcc/riscv32-unknown-elf/13.2.0/",
+        {
-                        "-L/opt/riscv/riscv32-unknown-elf/lib",
+            linker_arguments.push_back("-L" + segment);
-                        "/opt/riscv/riscv32-unknown-elf/lib/crt0.o",
+            environment.push_back(std::filesystem::path(segment));
-                        "/opt/riscv/lib/gcc/riscv32-unknown-elf/13.2.0/crtbegin.o",
+        }
-                       test_object.string(),
+        linker_arguments.push_back(find_object(environment, "crt0.o"));
-                        "--start-group", "-lgcc", "-lc", "-lgloss", "--end-group",
+        linker_arguments.push_back(find_object(environment, "crtbegin.o"));
-                        "/opt/riscv/lib/gcc/riscv32-unknown-elf/13.2.0/crtend.o"
+        linker_arguments.push_back(test_object.string());
-                    }
+        linker_arguments.insert(linker_arguments.cend(),
+                { "--start-group", "-lgcc", "-lc", "-lgloss", "--end-group" });
+        linker_arguments.push_back(find_object(environment, "crtend.o"));
+
+        boost::process::v2::execute(boost::process::v2::process(context,
+                    boost::process::search_path("ld"),
+                    linker_arguments
         ));
         return test_result{};
     }