feat(furas): introduce basic generator

Closes: #56

furas/include/furas/gen.hpp

@@ -0,0 +1,36 @@
+#ifndef FURAS_GEN_HPP
+#define FURAS_GEN_HPP
+
+#include "furas/lexer.hpp"
+#include "furvm/module.hpp"
+
+#include <string>
+
+namespace furas {
+
+struct generator_error {
+    enum type {
+        Success = 0,
+        Eof     = 1,
+
+        UnexpectedEof    = -1,
+        UnexpectedToken  = -2,
+        UnknownCharacter = -3,
+        UnknownType      = -4,
+    } type = Success;
+    std::string message;
+};
+
+class generator {
+public:
+    struct result {
+        generator_error error;
+        furvm::mod      mod;
+    };
+public:
+    static result generate(lexer lexer);
+};
+
+} // namespace furas
+
+#endif // FURAS_GEN_HPP

furas/include/furas/token.hpp

@@ -18,9 +18,14 @@ struct token {
         Sha256,  /**< Label marker(`#`). */
         Percent, /**< Variable marker(`%`). The more the better. */
 
-        Dot, /**< . */
+        EqSign, /**< `=` */
+        Dot,    /**< . */
+        Colon,  /**< `:` */
 
         // Keywords
+        Func,    /**< `func` keyword for defining functions. */
+        Type,    /**< `type` keyword for defining types. */
+        Native,  /**< `native` keyword for native functions. :v: */
         Import,  /**< `import` keyword for importing functions and types. */
         Public,  /**< `public` access specifier. */
         Private, /**< `private` access specifier. */
@@ -29,6 +34,7 @@ struct token {
         Push,
         Array,
         Get,
+        Set,
         Drop,
         Dup,
         Clone,
@@ -50,7 +56,7 @@ struct token {
         Load,
         Store,
         Call,
-        Jump,
+        Jmp,
         Jnz,
         Ret,