尝试UTF32String

src/Repl/Repl.cpp

@@ -1,7 +1,7 @@
 #include <Ast/astBase.hpp>
 #include <Error/error.hpp>
 #include <Error/errorLog.hpp>
-#include <Core/fig_string.hpp>
+#include <Core/String.hpp>
 #include <Repl/Repl.hpp>
 #include <vector>
 
@@ -11,8 +11,8 @@ namespace Fig
     {
         ostream << getPrompt() << "\n";
 
-        const FString &sourcePath = u8"<stdin>";
-        const std::vector<FString> &sourceLines{};
+        const String &sourcePath = U"<stdin>";
+        const std::vector<String> &sourceLines{};
 
         Evaluator evaluator;
 
@@ -24,7 +24,7 @@ namespace Fig
         while (true)
         {
             ostream << "\r\n>>";
-            const FString &line = readline();
+            const String &line = readline();
 
             if (line.empty())
             {