Updated REPL (thanks to cpp-linenoise!)

src/defs/defs.cpp

@@ -53,7 +53,11 @@ Instruction::Instruction(std::vector<Value> toks) {
         } else if (toks[0].valtype == ValueType::Variable) {
             instruction = InstructionType::Variable;
         } else {
-            error("Instruction should be an identifier or variable value");
+            if (inReplMode) {
+                instruction = InstructionType::Variable;
+            } else {
+                error("Instruction should be an identifier or variable value");
+            }
         }
         if (instruction == InstructionType::Variable) {
             for (const auto& tok : toks) {
@@ -85,7 +89,7 @@ Value::Value(std::string stringval) {
     }
 
     if (stringval.empty()) {
-        valtype = ValueType::String;
+        valtype = ValueType::None;
         string_val = "";
         return;
     }

src/defs/defs.h

@@ -10,7 +10,7 @@ enum class InstructionType {
 };
 
 enum class ValueType {
-    Processed, Variable, InstructionGroup, List, Map, String, Int, Double, Identifier, Custom, TypePlaceholder
+    Processed, Variable, InstructionGroup, List, Map, String, Int, Double, Identifier, Custom, TypePlaceholder, None
 };
 
 struct Instruction;

src/repl/repl.cpp

@@ -5,11 +5,12 @@
 #include <iostream>
 #include <string>
 #include "../data/data.h"
+#include "../vendor/linenoise/linenoise.hpp"
 
 void repl() {
     data::initScopes();
     inReplMode = true;
-    std::cout << "Kyn REPL v0.0.1" << std::endl;
+    std::cout << "Kyn REPL v0.0.2" << std::endl;
     std::cout << "Type 'exit' to exit" << std::endl;
 
     std::string full_command;
@@ -17,14 +18,11 @@ void repl() {
     int brace_level = 0;
 
     while (true) {
-        if (brace_level == 0) {
-            std::cout << "kyn> ";
-        } else {
-            std::cout << ".. > ";
-        }
+        auto prompt = brace_level == 0 ? "kyn> " : ".. > ";
+        auto quit = linenoise::Readline(prompt, line_buf);
 
-        if (!getline(std::cin, line_buf)) {
-            break; // Handle EOF (Ctrl+D)
+        if (quit) {
+            break;
         }
 
         for (char c : line_buf) {
@@ -44,9 +42,13 @@ void repl() {
             if (full_command.find_first_not_of(" \t\n\r") != std::string::npos) {
                 std::vector<Instruction> parsed = parse(full_command);
                 for (Instruction inst : parsed) {
-                    execute(inst);
+                    Value instruction = execute(inst);
+                    if (!(instruction.valtype == ValueType::None)) {
+                        std::cout << instruction.toString() << std::endl;
+                    }
                 }
             }
+            linenoise::AddHistory(full_command.c_str());
             full_command.clear();
             brace_level = 0;
         }