Simple list implementation

src/datatypes/lists.cpp

@@ -0,0 +1,53 @@
+#include "lists.h"
+
+// Helper to trim whitespace from the start and end of a string
+std::string trim(const std::string& str) {
+    size_t first = str.find_first_not_of(" \t\n\r");
+    if (std::string::npos == first) {
+        return str;
+    }
+    size_t last = str.find_last_not_of(" \t\n\r");
+    return str.substr(first, (last - first + 1));
+}
+
+std::vector<Value> parse_list_content(const std::string& content) {
+    std::vector<Value> items;
+    std::string current_item;
+    bool in_string = false;
+    int nested_level = 0;
+
+    for (char c : content) {
+        if (c == '"') {
+            in_string = !in_string;
+        }
+
+        if (c == ',' && !in_string && nested_level == 0) {
+            // End of an item
+            std::string trimmed = trim(current_item);
+            if (!trimmed.empty()) {
+                if (trimmed.front() == '"' && trimmed.back() == '"') {
+                    items.push_back(Value(trimmed.substr(1, trimmed.length() - 2)));
+                } else {
+                    items.push_back(Value(trimmed));
+                }
+            }
+            current_item.clear();
+        } else {
+            if (c == '[' || c == '(') nested_level++;
+            if (c == ']' || c == ')') nested_level--;
+            current_item += c;
+        }
+    }
+
+    // Last item
+    std::string trimmed = trim(current_item);
+    if (!trimmed.empty()) {
+        if (trimmed.front() == '"' && trimmed.back() == '"') {
+            items.push_back(Value(trimmed.substr(1, trimmed.length() - 2)));
+        } else {
+            items.push_back(Value(trimmed));
+        }
+    }
+
+    return items;
+}

src/datatypes/lists.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <vector>
+#include <string>
+#include "../defs/defs.h"
+
+std::vector<Value> parse_list_content(const std::string& content);
+std::string trim(const std::string& str);

src/defs/defs.cpp

@@ -4,6 +4,7 @@
 #include <string>
 #include <memory>
 #include <utility>
+#include "../datatypes/lists.h"
 
 InstructionType strToInstructionType(std::string in) {
     if (in == "println") return InstructionType::Println;
@@ -16,6 +17,7 @@ InstructionType strToInstructionType(std::string in) {
     else if (in == "compare") return InstructionType::Compare;
     else if (in == "input") return InstructionType::Input;
     else if (in == "return") return InstructionType::Return;
+    else if (in == "concat") return InstructionType::Concat;
     else return InstructionType::Variable;
 }
 
@@ -69,7 +71,9 @@ Value::Value() : valtype(ValueType::Real) {}
 
 Value::Value(InstructionGroup instgroup) : valtype(ValueType::InstructionGroup), instructionGroup(instgroup) {};
 
-Value::Value(const Value& other) : valtype(other.valtype), real(other.real), varName(other.varName), instructionGroup(other.instructionGroup) {
+Value::Value(std::vector<Value> listval) : valtype(ValueType::List), list(std::move(listval)) {}
+
+Value::Value(const Value& other) : valtype(other.valtype), real(other.real), varName(other.varName), instructionGroup(other.instructionGroup), list(other.list) {
     if (other.processed) {
         processed = std::make_unique<Instruction>(*other.processed);
     }
@@ -86,6 +90,7 @@ Value& Value::operator=(const Value& other) {
         real = other.real;
         varName = other.varName;
         instructionGroup = other.instructionGroup;
+        list = other.list;
         if (other.processed) {
             processed = std::make_unique<Instruction>(*other.processed);
         } else {
@@ -113,6 +118,14 @@ std::string Value::toString() const {
         case ValueType::InstructionGroup:
             out += "InstructionGroup, contains " + std::to_string(instructionGroup.size()) + " instructions)";
             break;
+        case ValueType::List: {
+            out += "List, items: [";
+            for (const auto& item : list) {
+                out += item.toString() + ", ";
+            }
+            out += "])";
+            break;
+        }
         default:
             out += "FIXME)";
             break;
@@ -161,6 +174,8 @@ std::vector<Value> split(std::string line) {
     std::string buf;
     bool instring = false;
     int brackets = 0;
+    char bracket_type = 0;
+
     for (char chr : line) {
         if (chr == ' ' && !instring && brackets == 0 && !buf.empty()) {
             if (buf[0] == '$') {
@@ -170,8 +185,8 @@ std::vector<Value> split(std::string line) {
             }
             buf = "";
         } else if (chr == '(' || chr == '[') {
-            brackets += 1;
+            if (brackets == 0) {
-            if (brackets == 1) {
+                bracket_type = chr;
                 if (!buf.empty()) {
                     splitvals.push_back(Value(buf));
                     buf = "";
@@ -179,13 +194,20 @@ std::vector<Value> split(std::string line) {
             } else {
                 buf += chr;
             }
+            brackets++;
         } else if (chr == ')' || chr == ']') {
-            brackets -= 1;
+            brackets--;
             if (brackets == 0) {
                 if (!buf.empty()) {
-                    splitvals.push_back(Value(Instruction(split(buf))));
+                    if (bracket_type == '(') {
+                        splitvals.push_back(Value(Instruction(split(buf))));
+                    } else {
+                        splitvals.push_back(Value(parse_list_content(buf)));
+                    }
                     buf = "";
                 }
+            } else {
+                buf += chr;
             }
         } else if (chr == '"') {
             instring = !instring;

src/defs/defs.h

@@ -6,11 +6,11 @@
 
 
 enum class InstructionType {
-    None, Print, Println, Math, Let, Variable, Exit, If, While, Input, Compare, Function, Return
+    None, Print, Println, Math, Let, Variable, Exit, If, While, Input, Compare, Function, Return, Concat
 };
 
 enum class ValueType {
-    Real, Processed, Variable, InstructionGroup
+    Real, Processed, Variable, InstructionGroup, List, Map
 };
 
 struct Instruction;
@@ -33,12 +33,14 @@ struct Value {
     std::unique_ptr<Instruction> processed;
     std::string real = "";
     InstructionGroup instructionGroup;
+    std::vector<Value> list;
     bool is_return = false;
     std::string toString() const;
     Varname varName = Varname();
     Value(std::string stringval);
     Value(Instruction instval);
     Value(InstructionGroup instgroup);
+    Value(std::vector<Value> listval);
     Value(Varname var);
     Value();
     Value(const Value& other);
@@ -58,4 +60,5 @@ struct Instruction {
 
 std::vector<Value> split(std::string in);
 InstructionType strToInstructionType(std::string in);
+std::string trim(const std::string& str);
 extern bool inReplMode;

src/executor/executor.cpp

@@ -13,6 +13,7 @@
 #include "../modules/compare/compare.h"
 #include "../modules/input/input.h"
 #include "../modules/function/function.h"
+#include "../modules/concat/concat.h"
 
 Value execute(Instruction inst) {
     // Special cases that need to manage their own argument evaluation
@@ -68,6 +69,9 @@ Value execute(Instruction inst) {
         case InstructionType::Exit:
             return modules::exit(inst.args);
             break;
+        case InstructionType::Concat:
+            return modules::concat(inst.args);
+            break;
         case InstructionType::Variable: {
             if (!inst.args.empty()) {
                 const std::string& name = inst.args[0].real;

src/modules/concat/concat.cpp

@@ -0,0 +1,16 @@
+#include "concat.h"
+#include "../../defs/defs.h"
+#include "../../error/error.h"
+#include <vector>
+
+Value modules::concat(std::vector<Value> args) {
+    std::string buf;
+    for (Value val : args) {
+        if (val.valtype == ValueType::Real) {
+            buf += val.real;
+        } else {
+            error("Can only concatenate real values");
+        }
+    }
+    return buf;
+}

src/modules/concat/concat.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "../../defs/defs.h"
+#include <vector>
+
+namespace modules {
+    Value concat(std::vector<Value> args);
+}

src/modules/print/print.cpp

@@ -8,7 +8,22 @@
 Value modules::print(std::vector<Value> values) {
     for (Value value : values) {
         if (value.valtype == ValueType::Real) {
-            std::cout << value.real << " ";
+            std::cout << value.real;
+            if (values.size() > 1) {
+                std::cout << " ";
+            }
+        } else if (value.valtype == ValueType::List) {
+            std::cout << "[";
+            bool afterfirst = false;
+            for (Value val : value.list) {
+                if (afterfirst) {
+                    std::cout << ", ";
+                } else {
+                    afterfirst = true;
+                }
+                print({val});
+            }
+            std::cout << "]";
         } else {
             error("FIXME unprocessed processed (in print module)");
         }

src/modules/println/println.cpp

@@ -1,18 +1,12 @@
 #include "println.h"
 #include "../../defs/defs.h"
-#include "../../error/error.h"
+#include "../print/print.h"
 #include <vector>
 #include <iostream>
 #include <string>
 
 Value modules::println(std::vector<Value> values) {
-    for (Value value : values) {
+    print(values);
-        if (value.valtype == ValueType::Real) {
-            std::cout << value.real << " ";
-        } else {
-            error("FIXME unprocessed processed (in println module)");
-        }
-    }
     std::cout << "\n";
     return Value("");
 }

src/modules/split/split.cpp

@@ -0,0 +1,8 @@
+#include "split.h"
+#include "../../defs/defs.h"
+#include <vector>
+#include <string>
+
+Value modules::split(std::vector<Value> args) {
+    return Value("Work in progress!");
+}

src/modules/split/split.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "../../defs/defs.h"
+#include <vector>
+
+namespace modules {
+    Value split(std::vector<Value> args);
+}

src/parser/parser.cpp

@@ -3,16 +3,6 @@
 #include <string>
 #include <vector>
 
-// Helper to trim whitespace
-std::string trim(const std::string& str) {
-    size_t first = str.find_first_not_of(" \t\n\r");
-    if (std::string::npos == first) {
-        return str;
-    }
-    size_t last = str.find_last_not_of(" \t\n\r");
-    return str.substr(first, (last - first + 1));
-}
-
 std::vector<Instruction> parse(std::string program) {
     std::vector<Instruction> instructions;
     std::vector<std::string> lines;