update REPL functions.

1 files changed, 22 insertions, 11 deletions

diff --git a/src/moonp.cpp b/src/moonp.cpp
index d1c565f..a67a5a7 100644
--- a/src/moonp.cpp
+++ b/src/moonp.cpp
@@ -22,6 +22,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #include <memory>
 using namespace std::string_view_literals;
 #include "ghc/fs_std.hpp"
+#include "linenoise.hpp"
 
 #define _DEFER(code,line) std::shared_ptr<void> _defer_##line(nullptr, [&](auto){code;})
 #define DEFER(code) _DEFER(code,__LINE__)
@@ -95,15 +96,17 @@ int main(int narg, const char** args) {
                         return 1;
                 }
                 int count = 0;
-                while (!std::cin.fail()) {
+                bool quit = false;
+                linenoise::SetMultiLine(false);
+                while (!quit) {
                         count++;
-                        std::cout << "moon> "sv;
                         std::string codes;
-                        std::getline(std::cin, codes);
+                        quit = linenoise::Readline("moon> ", codes);
+                        linenoise::AddHistory(codes.c_str());
                         MoonP::Utils::trim(codes);
                         if (codes == "$"sv) {
                                 codes.clear();
-                                for (std::string line; std::getline(std::cin, line);) {
+                                for (std::string line; !linenoise::Readline("", line);) {
                                         auto temp = line;
                                         MoonP::Utils::trim(temp);
                                         if (temp == "$"sv) {
@@ -111,6 +114,8 @@ int main(int narg, const char** args) {
                                         }
                                         codes += '\n';
                                         codes += line;
+                                        linenoise::AddHistory(line.c_str());
+                                        MoonP::Utils::trim(codes);
                                 }
                         }
                         codes.insert(0, "global *\n"sv);
@@ -118,7 +123,7 @@ int main(int narg, const char** args) {
                         DEFER(lua_settop(L, top));
                         pushMoonp(L, "loadstring"sv);
                         lua_pushlstring(L, codes.c_str(), codes.size());
-                        lua_pushstring(L, (std::string("=(repl:") + std::to_string(count) + ')').c_str());
+                        lua_pushstring(L, (std::string("=(repl ") + std::to_string(count) + ')').c_str());
                         pushOptions(L, -1);
                         const std::string_view Err = "\033[35m"sv, Val = "\033[33m"sv, Stop = "\033[0m\n"sv;
                         if (lua_pcall(L, 3, 2, 0) != 0) {
@@ -126,7 +131,13 @@ int main(int narg, const char** args) {
                                 continue;
                         }
                         if (lua_isnil(L, -2) != 0) {
-                                std::cout << Err << lua_tostring(L, -1) << Stop;
+                                std::string err = lua_tostring(L, -1);
+                                auto pos = err.find(':');
+                                if (pos != std::string::npos) {
+                                        int lineNum = std::stoi(err.substr(0, pos));
+                                        err = std::to_string(lineNum - 1) + err.substr(pos);
+                                }
+                                std::cout << Err << err << Stop;
                                 continue;
                         }
                         lua_pop(L, 1);
@@ -168,16 +179,16 @@ int main(int narg, const char** args) {
                                 std::cout << help;
                                 return 1;
                         }
-                        char ch;
-                        std::string s;
-                        while ((ch = std::cin.get()) != EOF) {
-                                s += ch;
+                        std::string codes;
+                        linenoise::SetMultiLine(false);
+                        for (std::string line; !linenoise::Readline("", line);) {
+                                codes += line;
                         }
                         MoonP::MoonConfig conf;
                         conf.implicitReturnRoot = true;
                         conf.lintGlobalVariable = false;
                         conf.reserveLineNumber = false;
-                        auto result = MoonP::MoonCompiler{nullptr, openlibs}.compile(s, conf);
+                        auto result = MoonP::MoonCompiler{nullptr, openlibs}.compile(codes, conf);
                         if (std::get<1>(result).empty()) {
                                 std::cout << std::get<0>(result);
                                 return 0;