Add break continue

.gitignore

@@ -23,6 +23,7 @@ Makefile
 # Generated files
 *.log
 *.out
+.cache/
 
 # macOS
 .DS_Store

CMakeLists.txt

@@ -1,56 +1,78 @@
 cmake_minimum_required(VERSION 3.30)
 project(camellya)
 
-set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+option(CAMELLYA_BUILD_TESTS "Build tests" ON)
+option(CAMELLYA_BUILD_STATIC "Build static library" ON)
+option(CAMELLYA_BUILD_CLI "Build command line interface" ON)
 
 # Library sources
 set(LIB_SOURCES
-    library.cpp
-    lexer.cpp
-    parser.cpp
-    value.cpp
-    interpreter.cpp
-    state.cpp
+    src/lexer.cpp
+    src/parser.cpp
+    src/value.cpp
+    src/interpreter.cpp
+    src/state.cpp
 )
 
+# Library headers
 set(LIB_HEADERS
-    library.h
-    lexer.h
-    parser.h
-    ast.h
-    value.h
-    interpreter.h
-    state.h
+    src/camellya.h
+    src/lexer.h
+    src/parser.h
+    src/ast.h
+    src/value.h
+    src/interpreter.h
+    src/state.h
 )
 
-# Build static library
-add_library(camellya STATIC ${LIB_SOURCES} ${LIB_HEADERS})
+if(CAMELLYA_BUILD_STATIC)
+    add_library(libcamellya STATIC ${LIB_SOURCES} ${LIB_HEADERS})
+elseif()
+    add_library(libcamellya SHARED ${LIB_SOURCES} ${LIB_HEADERS})
+endif()
 
-include(FetchContent)
+target_include_directories(libcamellya PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)
 
-FetchContent_Declare(
-    Catch2
-    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
-    GIT_TAG v3.6.0
-)
+if(CAMELLYA_BUILD_CLI)
+    add_executable(camellya
+        cli/main.cpp
+    )
+    target_link_libraries(camellya
+        PRIVATE
+            libcamellya
+    )
+endif()
 
-FetchContent_MakeAvailable(Catch2)
+if(CAMELLYA_BUILD_TESTS)
+    include(FetchContent)
 
-enable_testing()
+    FetchContent_Declare(
+        Catch2
+        GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+        GIT_TAG v3.12.0
+    )
 
-add_executable(camellya_tests
-    tests/test_basic.cpp
-)
+    FetchContent_MakeAvailable(Catch2)
 
-target_include_directories(camellya_tests
-    PRIVATE
-        ${CMAKE_CURRENT_SOURCE_DIR}
-)
+    enable_testing()
 
-target_link_libraries(camellya_tests
-    PRIVATE
-        camellya
-        Catch2::Catch2WithMain
-)
+    add_executable(camellya_tests
+        tests/test_basic.cpp
+    )
 
-add_test(NAME camellya_tests COMMAND camellya_tests)
+    target_include_directories(camellya_tests
+        PRIVATE
+            ${CMAKE_CURRENT_SOURCE_DIR}
+    )
+
+    target_link_libraries(camellya_tests
+        PRIVATE
+            libcamellya
+            Catch2::Catch2WithMain
+    )
+
+    add_test(NAME camellya_tests COMMAND camellya_tests)
+endif()

cli/main.cpp

@@ -0,0 +1,22 @@
+#include "camellya.h"
+#include <iostream>
+#include <format>
+#include <chrono>
+
+int main(int argc, char** argv) {
+    if(argc < 2){
+        std::cout << std::format("Usage: camellya <script> \n") << std::endl;
+        return 0;
+    }
+    std::chrono::high_resolution_clock::time_point start = std::chrono::high_resolution_clock::now();
+    camellya::State state;
+    bool success = state.do_file(argv[1]);
+    if (!success) {
+        std::cerr << "Error: " << state.get_error() << std::endl;
+        return 1;
+    }
+    std::chrono::high_resolution_clock::time_point end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> duration = end - start;
+    std::cout << std::format("Execution completed in {} seconds. \n", duration.count()) << std::endl;
+    return 0;
+}

example.chun

@@ -34,6 +34,14 @@ print("List:", numbers);
 print("First element (index 0):", numbers[0]);
 print("Third element (index 2):", numbers[2]);
 
+for(number i = 0; i < len(numbers); i = i + 1) {
+    print("List element", numbers[i]);
+}
+
+while(true) {
+    print("test break");
+    break;
+}
 // Test maps
 print("\n=== Map Demo ===");
 map config = {"host": "localhost", "port": "8080"};

library.cpp

@@ -1,4 +0,0 @@
-#include "library.h"
-
-// Implementation file for Camellya scripting language
-// All implementation is in separate source files

src/ast.h

@@ -183,6 +183,14 @@ struct ReturnStmt : public Stmt {
     explicit ReturnStmt(ExprPtr value = nullptr) : value(std::move(value)) {}
 };
 
+struct BreakStmt : public Stmt {
+    BreakStmt() = default;
+};
+
+struct ContinueStmt : public Stmt {
+    ContinueStmt() = default;
+};
+
 struct FunctionDecl : public Stmt {
     std::string name;
     std::vector<std::pair<std::string, std::string>> parameters; // (type, name)

src/interpreter.cpp

@@ -106,6 +106,10 @@ void Interpreter::execute_statement(const Stmt& stmt) {
         exec_for(*for_stmt);
     } else if (auto* return_stmt = dynamic_cast<const ReturnStmt*>(&stmt)) {
         exec_return(*return_stmt);
+    } else if (auto* break_stmt = dynamic_cast<const BreakStmt*>(&stmt)) {
+        exec_break(*break_stmt);
+    } else if (auto* continue_stmt = dynamic_cast<const ContinueStmt*>(&stmt)) {
+        exec_continue(*continue_stmt);
     } else if (auto* func_decl = dynamic_cast<const FunctionDecl*>(&stmt)) {
         exec_function_decl(*func_decl);
     } else if (auto* class_decl = dynamic_cast<const ClassDecl*>(&stmt)) {
@@ -397,8 +401,17 @@ void Interpreter::exec_if(const IfStmt& stmt) {
 }
 
 void Interpreter::exec_while(const WhileStmt& stmt) {
-    while (is_truthy(evaluate(*stmt.condition))) {
-        execute_statement(*stmt.body);
+    try {
+        while (is_truthy(evaluate(*stmt.condition))) {
+            try {
+                execute_statement(*stmt.body);
+            } catch (const ContinueException&) {
+                // Continue: just proceed to the next iteration (check condition again)
+                continue;
+            }
+        }
+    } catch (const BreakException&) {
+        // Break: exit the loop
     }
 }
 
@@ -412,12 +425,18 @@ void Interpreter::exec_for(const ForStmt& stmt) {
         }
         
         while (!stmt.condition || is_truthy(evaluate(*stmt.condition))) {
-            execute_statement(*stmt.body);
+            try {
+                execute_statement(*stmt.body);
+            } catch (const ContinueException&) {
+                // Continue: proceed to increment
+            }
             
             if (stmt.increment) {
                 evaluate(*stmt.increment);
             }
         }
+    } catch (const BreakException&) {
+        // Break: exit the loop
     } catch (...) {
         environment = previous;
         throw;
@@ -431,6 +450,14 @@ void Interpreter::exec_return(const ReturnStmt& stmt) {
     throw ReturnException(value);
 }
 
+void Interpreter::exec_break(const BreakStmt& stmt) {
+    throw BreakException();
+}
+
+void Interpreter::exec_continue(const ContinueStmt& stmt) {
+    throw ContinueException();
+}
+
 void Interpreter::exec_function_decl(const FunctionDecl& stmt) {
     auto func_decl = std::make_shared<FunctionDecl>(stmt);
     auto func = std::make_shared<FunctionValue>(stmt.name, func_decl);

src/interpreter.h

@@ -20,6 +20,9 @@ public:
     explicit ReturnException(ValuePtr value) : value(std::move(value)) {}
 };
 
+class BreakException : public std::exception {};
+class ContinueException : public std::exception {};
+
 class Environment {
 public:
     std::shared_ptr<Environment> parent;
@@ -138,6 +141,8 @@ private:
     void exec_while(const WhileStmt& stmt);
     void exec_for(const ForStmt& stmt);
     void exec_return(const ReturnStmt& stmt);
+    void exec_break(const BreakStmt& stmt);
+    void exec_continue(const ContinueStmt& stmt);
     void exec_function_decl(const FunctionDecl& stmt);
     void exec_class_decl(const ClassDecl& stmt);
     

src/lexer.cpp

@@ -61,7 +61,8 @@ void Lexer::skip_whitespace() {
 }
 
 void Lexer::skip_comment() {
-    if (peek() == '/' && peek_next() == '/') {
+    if (peek() == '/') {
+        advance();
         while (peek() != '\n' && !is_at_end()) {
             advance();
         }
@@ -223,6 +224,8 @@ TokenType Lexer::get_keyword_type(const std::string& text) const {
         {"and", TokenType::AND},
         {"or", TokenType::OR},
         {"this", TokenType::THIS},
+        {"continue", TokenType::CONTINUE},
+        {"break", TokenType::BREAK},
     };
     
     auto it = keywords.find(text);

src/lexer.h

@@ -12,7 +12,7 @@ enum class TokenType {
     // Keywords
     CLASS, FUNC, NUMBER, STRING, BOOL, LIST, MAP,
     IF, ELSE, WHILE, FOR, RETURN, VAR,
-    TRUE, FALSE, NIL, THIS,
+    TRUE, FALSE, NIL, THIS, CONTINUE, BREAK,
     
     // Operators
     PLUS, MINUS, STAR, SLASH, PERCENT,

src/parser.cpp

@@ -1,5 +1,6 @@
 #include "parser.h"
 #include <format>
+#include <iostream>
 
 namespace camellya {
 
@@ -12,6 +13,7 @@ Program Parser::parse() {
         try {
             statements.push_back(declaration());
         } catch (const ParseError& error) {
+            std::cerr << error.what() << std::endl;
             synchronize();
         }
     }
@@ -118,7 +120,6 @@ StmtPtr Parser::class_declaration() {
             members.push_back(function_declaration());
         } else {
             members.push_back(var_declaration());
-            consume(TokenType::SEMICOLON, "Expected ';' after field declaration.");
         }
     }
     
@@ -168,6 +169,7 @@ StmtPtr Parser::var_declaration() {
     if (match({TokenType::EQUAL})) {
         initializer = expression();
     }
+    consume(TokenType::SEMICOLON, "Expected ';' after variable declaration.");
     
     return std::make_unique<VarDecl>(type_name, name.lexeme, std::move(initializer));
 }
@@ -177,6 +179,8 @@ StmtPtr Parser::statement() {
     if (match({TokenType::WHILE})) return while_statement();
     if (match({TokenType::FOR})) return for_statement();
     if (match({TokenType::RETURN})) return return_statement();
+    if (match({TokenType::BREAK})) return break_statement();
+    if (match({TokenType::CONTINUE})) return continue_statement();
     if (match({TokenType::LEFT_BRACE})) return block_statement();
     
     return expression_statement();
@@ -214,7 +218,6 @@ StmtPtr Parser::for_statement() {
     StmtPtr initializer = nullptr;
     if (!match({TokenType::SEMICOLON})) {
         initializer = declaration();
-        consume(TokenType::SEMICOLON, "Expected ';' after for initializer.");
     }
     
     ExprPtr condition = nullptr;
@@ -246,16 +249,21 @@ StmtPtr Parser::return_statement() {
     return std::make_unique<ReturnStmt>(std::move(value));
 }
 
+StmtPtr Parser::break_statement() {
+    consume(TokenType::SEMICOLON, "Expected ';' after 'break'.");
+    return std::make_unique<BreakStmt>();
+}
+
+StmtPtr Parser::continue_statement() {
+    consume(TokenType::SEMICOLON, "Expected ';' after 'continue'.");
+    return std::make_unique<ContinueStmt>();
+}
+
 StmtPtr Parser::block_statement() {
     std::vector<StmtPtr> statements;
     
     while (!check(TokenType::RIGHT_BRACE) && !is_at_end()) {
-        auto stmt = declaration();
-        // If declaration returned a VarDecl (not a class/function/statement), consume semicolon
-        if (dynamic_cast<VarDecl*>(stmt.get())) {
-            consume(TokenType::SEMICOLON, "Expected ';' after variable declaration.");
-        }
-        statements.push_back(std::move(stmt));
+        statements.push_back(declaration());
     }
     
     consume(TokenType::RIGHT_BRACE, "Expected '}' after block.");

src/parser.h

@@ -44,6 +44,8 @@ private:
     StmtPtr while_statement();
     StmtPtr for_statement();
     StmtPtr return_statement();
+    StmtPtr break_statement();
+    StmtPtr continue_statement();
     StmtPtr block_statement();
     StmtPtr expression_statement();
     

tests/test_basic.cpp

@@ -1,6 +1,6 @@
 #include <catch2/catch_test_macros.hpp>
 #include <catch2/benchmark/catch_benchmark.hpp>
-#include "library.h"
+#include "camellya.h"
 
 #include <memory>
 
@@ -148,3 +148,72 @@ TEST_CASE("interpreter performance: simple loop", "[perf][script]") {
         REQUIRE(r_num->value == 499500.0);
     };
 }
+
+TEST_CASE("loop break", "[script][loop]") {
+    State state;
+    const char* script = R"(
+        number sum = 0;
+        for (number i = 0; i < 10; i = i + 1) {
+            if (i == 5) {
+                break;
+            }
+            sum = sum + i;
+        }
+    )";
+
+    REQUIRE(state.do_string(script));
+    auto sum_val = state.get_global("sum");
+    REQUIRE(sum_val);
+    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+    REQUIRE(sum_num->value == 10.0); // 0+1+2+3+4 = 10
+}
+
+TEST_CASE("loop continue", "[script][loop]") {
+    State state;
+    const char* script = R"(
+        number sum = 0;
+        for (number i = 0; i < 5; i = i + 1) {
+            if (i == 2) {
+                continue;
+            }
+            sum = sum + i;
+        }
+    )";
+
+    REQUIRE(state.do_string(script));
+    auto sum_val = state.get_global("sum");
+    REQUIRE(sum_val);
+    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+    REQUIRE(sum_num->value == 8.0); // 0+1+3+4 = 8
+}
+
+TEST_CASE("while break and continue", "[script][loop]") {
+    State state;
+    const char* script = R"(
+        number i = 0;
+        number sum = 0;
+        while (i < 10) {
+            i = i + 1;
+            if (i == 3) {
+                continue;
+            }
+            if (i == 6) {
+                break;
+            }
+            sum = sum + i;
+        }
+    )";
+
+    REQUIRE(state.do_string(script));
+    auto sum_val = state.get_global("sum");
+    REQUIRE(sum_val);
+    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+    REQUIRE(sum_num->value == 12.0); 
+    // 1st iter: i=1, sum=1
+    // 2nd iter: i=2, sum=1+2=3
+    // 3rd iter: i=3, continue
+    // 4th iter: i=4, sum=3+4=7
+    // 5th iter: i=5, sum=7+5=12
+    // 6th iter: i=6, break
+    // Result should be 12.0
+}