Combining two repos

luprex/core/cpp/luaconsole.hpp

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+//////////////////////////////////////////////////////
+//
+// LuaConsole:
+//
+// Used to parse commands that are being interactively typed
+// in by a user.
+//
+// The command syntax is always a single character command,
+// followed by arguments.  Only two commands are hardwired:
+//
+//    l - evaluate lua expression
+//    r - evaluate lua expression with 'return' prepended
+//
+// The console expects you to add lines of text one at a time.
+// After adding a line, the console will recommend one of these
+// actions:
+//
+// 1. DO_NOTHING: Add more lines of text.
+// 2. DO_LUA: Evaluate a lua expression.
+// 3. DO_OTHER: Execute a non-lua command.
+// 4. DO_SYNTAX: Print a lua syntax error.
+//
+//////////////////////////////////////////////////////
+
+#ifndef LUACONSOLE_HPP
+#define LUACONSOLE_HPP
+
+#include <string>
+#include "luastack.hpp"
+
+class LuaConsole {
+public:
+    enum {
+        DO_NOTHING,  // We need more input text.
+        DO_COMMAND,  // We have a valid slash command.
+        DO_LUA,      // We have a valid lua expression.
+        DO_SYNTAX,   // We have a syntax error.
+    };
+    using StringVec = std::vector<std::string>;
+
+private:
+    lua_State *lua_state_;
+    int action_;
+    std::string raw_input_;
+    int lines_;
+    std::string lua_expression_;
+    StringVec words_;
+    std::string syntax_;
+
+    void split_words();
+
+public:
+    LuaConsole();
+    ~LuaConsole();
+
+    // Get the recommended action.
+    int action() const { return action_; }
+
+    // When action is DO_COMMAND, get the command words.
+    const StringVec &words() const { return words_; }
+
+    // When action is DO_LUA, get the valid lua expression.
+    std::string lua_expression() const { return lua_expression_; }
+
+    // When action is DO_SYNTAX, get the syntax error.
+    const std::string &syntax() const { return syntax_; }
+
+    // Add a line of text that was just read from the console.
+    void add(std::string line);
+
+    // Read a line of text from stdin and add it.
+    void add_stdin();
+
+    // Clear the state.
+    void clear();
+};
+
+#endif // LUACONSOLE_HPP