progress

.gitmodules

@@ -12,3 +12,6 @@
 [submodule "external/googletest"]
 	path = external/googletest
 	url = https://github.com/google/googletest.git
+[submodule "external/abseil"]
+	path = external/abseil
+	url = git@github.com:abseil/abseil-cpp.git

.vscode/settings.json

@@ -75,6 +75,13 @@
         "exception": "cpp",
         "system_error": "cpp",
         "thread": "cpp",
-        "type_traits": "cpp"
+        "type_traits": "cpp",
+        "cfenv": "cpp",
+        "cinttypes": "cpp",
+        "csignal": "cpp",
+        "future": "cpp",
+        "regex": "cpp",
+        "scoped_allocator": "cpp",
+        "typeindex": "cpp"
     }
 }

CMakeLists.txt

@@ -19,8 +19,8 @@ endif()
 
 project(RiftLang)
 
-# C++17 for now might switch to 20
-set(CMAKE_CXX_STANDARD 17)
+# C++20 required
+set(CMAKE_CXX_STANDARD 20)
 
 # Set Debug Mode
 set(CMAKE_BUILD_TYPE Debug)
@@ -42,4 +42,9 @@ add_subdirectory(tests)
 # Google {Test&Mock}
 add_subdirectory(external/googletest)
 include_directories(${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
-include_directories(${gmock_SOURCE_DIR}/include ${gmock_SOURCE_DIR})
+include_directories(${gmock_SOURCE_DIR}/include ${gmock_SOURCE_DIR})
+
+# Google {Abseil}
+add_subdirectory(external/abseil)
+include_directories(${CMAKE_SOURCE_DIR}/external/abseil/absl)
+# target_link_libraries(riftlang absl::base absl::synchronization absl::strings)

include/ast/env.hh

@@ -0,0 +1,39 @@
+/////////////////////////////////////////////////////////////
+///                                                       ///
+///     ██████╗ ██╗███████╗████████╗                      ///
+///     ██╔══██╗██║██╔════╝╚══██╔══╝                      ///
+///     ██████╔╝██║█████╗     ██║                         ///
+///     ██╔══██╗██║██╔══╝     ██║                         ///
+///     ██║  ██║██║██║        ██║                         ///
+///     ╚═╝  ╚═╝╚═╝╚═╝        ╚═╝                         ///
+///     * RIFT CORE - The official compiler for Rift.     ///
+///     * Copyright (c) 2024, Rift-Org                    ///
+///     * License terms may be found in the LICENSE file. ///
+///                                                       ///
+/////////////////////////////////////////////////////////////
+
+#pragma once
+#include <absl/container/flat_hash_map.h>
+#include <scanner/tokens.hh>
+
+using Token = rift::scanner::Token;
+using str_t = std::string;
+using strv_t = std::string_view;
+
+namespace rift
+{
+    namespace ast
+    {
+        class Environment
+        {
+            public:
+                Environment() = default;
+                ~Environment() = default;
+
+                Token getEnv(const strv_t& name) const;
+                void setEnv(const strv_t& name, const Token& value);
+            protected:
+                absl::flat_hash_map<str_t, rift::scanner::Token> values;
+        };
+    }
+}

lib/CMakeLists.txt

@@ -23,6 +23,7 @@ set( SOURCES
     utils/literals.cc
 
     # AST
+    ast/env.cc
     ast/parser.cc
     ast/printer.cc
     ast/eval.cc
@@ -37,7 +38,6 @@ set( SOURCES
     main.cc
 )
 
-
 add_executable(
     riftlang 
     ${SOURCES}

lib/ast/env.cc

@@ -0,0 +1,38 @@
+/////////////////////////////////////////////////////////////
+///                                                       ///
+///     ██████╗ ██╗███████╗████████╗                      ///
+///     ██╔══██╗██║██╔════╝╚══██╔══╝                      ///
+///     ██████╔╝██║█████╗     ██║                         ///
+///     ██╔══██╗██║██╔══╝     ██║                         ///
+///     ██║  ██║██║██║        ██║                         ///
+///     ╚═╝  ╚═╝╚═╝╚═╝        ╚═╝                         ///
+///     * RIFT CORE - The official compiler for Rift.     ///
+///     * Copyright (c) 2024, Rift-Org                    ///
+///     * License terms may be found in the LICENSE file. ///
+///                                                       ///
+/////////////////////////////////////////////////////////////
+
+#include <ast/env.hh>
+#include <error/error.hh>
+
+namespace rift
+{
+    namespace ast
+    {
+        Token Environment::getEnv(const strv_t& name) const
+        {
+            if (!values.contains(name)) {
+                rift::error::runTimeError("🛑 Undefined variable '" + std::string(name) + "'");
+            }
+            return values.at("env");
+        }
+
+        void Environment::setEnv(const strv_t& name, const Token& value)
+        {
+            if (values.contains(name)) {
+                std::cout << "🟡 [line " << value.line << "] Warn: Variable '" << name << "' already defined." << std::endl;
+            }
+            values[name] = value;
+        }
+    }
+}