feat(parser): add platform-specific parsers and argument conventions

Implement platform-specific parsers for Windows, Linux, and macOS
Add GNU argument convention implementations
Create fake parser for testing purposes
Update CMakeLists to include new headers

CMakeLists.txt

@@ -7,4 +7,12 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Release ${CMAKE_CURRENT_SOURCE_DIR}/bin/release)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Debug ${CMAKE_CURRENT_SOURCE_DIR}/bin/debug)
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+include_directories(include)
+include_directories(include/parser)
+include_directories(include/conventions)
+include_directories(include/conventions/implementations)
+include_directories(include/parser/platform_headers)
+
 add_executable(test src/main.cpp)

include/argparse

@@ -0,0 +1,27 @@
+#pragma once
+#ifndef ARGPARSE_HPP
+#define ARGPARSE_HPP
+#include <argument_parser.hpp>
+#
+#ifdef __linux__
+#include <linux_parser.hpp>
+namespace argument_parser {
+    using parser = linux_parser; 
+}
+#elif __APPLE__
+#include <macos_parser.hpp>
+namespace argument_parser {
+    using parser = macos_parser; 
+}
+#elif _WIN32
+#include <windows_parser.hpp>
+namespace argument_parser {
+    using parser = windows_parser; 
+}
+#else
+#error "Unsupported platform"
+#endif
+#endif
+
+#include <base_convention.hpp>
+#include <gnu_argument_convention.hpp>

include/parser/argument_parser.hpp

@@ -1,5 +1,5 @@
 #pragma once
-#include "base_convention.hpp"
+#include <base_convention.hpp>
 #include <atomic>
 #include <cstdlib>
 #include <functional>
@@ -17,6 +17,7 @@
 #include <type_traits>
 #include <string>
 
+
 namespace argument_parser {
     namespace function {
         template<typename fn>
@@ -501,6 +502,8 @@ namespace argument_parser {
 
         friend class linux_parser; 
         friend class windows_parser; 
+        friend class macos_parser; 
+        friend class fake_parser; 
     };
 }
 

include/parser/fake_parser.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#ifndef FAKE_PARSER_HPP
+#define FAKE_PARSER_HPP
+
+#include <argument_parser.hpp>
+#include <crt_externs.h>
+#include <initializer_list>
+#include <string>
+
+namespace argument_parser {
+    class fake_parser : public base_parser {
+        public: 
+        fake_parser(std::string const& program_name, std::vector<std::string> const& arguments) {
+            this->program_name = program_name;
+            parsed_arguments = arguments;
+        }
+
+        fake_parser(std::string const& program_name, std::vector<std::string>&& arguments) {
+            this->program_name = program_name;
+            parsed_arguments = std::move(arguments);
+        }
+
+        fake_parser(std::string const& program_name, std::initializer_list<std::string> const& arguments) : 
+            fake_parser(program_name, std::vector<std::string>(arguments)) {}
+    }; 
+}
+
+#endif

include/parser/platform_headers/linux_parser.hpp

@@ -1,11 +1,11 @@
 #pragma once
-#include <fstream>
-#include <string>
 
 #ifdef __linux__
 #ifndef LINUX_PARSER_HPP
+#include <fstream>
+#include <string>
 
-#include "argument_parser.hpp"
+#include <argument_parser.hpp>
 
 namespace argument_parser {
     class linux_parser : public base_parser {

include/parser/platform_headers/macos_parser.hpp

@@ -0,0 +1,27 @@
+#pragma once
+#ifdef __APPLE__
+#ifndef MACOS_PARSER_HPP
+#define MACOS_PARSER_HPP
+
+#include <argument_parser.hpp>
+#include <crt_externs.h>
+#include <string>
+
+namespace argument_parser {
+    class macos_parser : public base_parser {
+        public: 
+        macos_parser() {
+            int argc = *_NSGetArgc();
+            char **argv = *_NSGetArgv();
+            if (argc > 0 && argv != nullptr && argv[0] != nullptr) {
+                program_name = argv[0];
+                for (int i = 1; i < argc; ++i) {
+                    if (argv[i] != nullptr) parsed_arguments.emplace_back(argv[i]);
+                }
+            }
+        }
+    }; 
+}
+
+#endif
+#endif

include/parser/platform_headers/windows_parser.hpp

@@ -2,7 +2,7 @@
 #ifdef _WIN32
 #ifndef WINDOWS_PARSER_HPP
 
-#include "argument_parser.hpp"
+#include <argument_parser.hpp>
 #include <fstream>
 #include <string>
 
@@ -11,7 +11,9 @@ namespace argument_parser {
         public: 
         windows_parser() {
         }
-    }; 
+    };
+
+    using parser = windows_parser; 
 }
 
 #endif 

src/main.cpp

@@ -1,32 +1,103 @@
-#include "../include/argument_parser.hpp"
-#include "../include/linux_parser.hpp"
-#include "../include/gnu_argument_convention.hpp"
-#include <initializer_list>
+#include "argument_parser.hpp"
+#include "fake_parser.hpp"
+#include <argparse>
+#include <cstdlib>
 #include <iostream>
+#include <fstream>
+#include <memory>
+#include <utility>
+#include <vector>
 
 using namespace argument_parser::conventions;
 
-int main() {
-    auto parametered_action = argument_parser::helpers::make_parametered_action_ptr<std::string>([](std::string const& test) {
-        std::cout << test << std::endl; 
-    });
+const std::initializer_list<argument_parser::conventions::convention const* const> conventions = {
+    &gnu_argument_convention,
+    &gnu_equal_argument_convention 
+}; 
 
-    auto parser = argument_parser::linux_parser{}; 
-    parser.add_argument("e", "echo", "echoes given variable", *parametered_action, false); 
-    parser.add_argument("re", "required_echo", "required echo", *parametered_action, true); 
+const auto echo = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& text) {
+    std::cout << text << std::endl; 
+});
 
-    std::initializer_list<argument_parser::conventions::convention const* const> conventions = {
-        &gnu_argument_convention,
-        &gnu_equal_argument_convention 
+const auto cat = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& file_name) {
+    std::ifstream file(file_name);
+    if (!file.is_open()) {
+        throw std::runtime_error("Could not open file");
+    }
+    std::string line;
+    while (std::getline(file, line)) {
+        std::cout << line << std::endl;
+    }
+
+    file.close();
+});
+
+auto make_grep_action(argument_parser::base_parser& parser) {
+    std::shared_ptr<std::string> filename = std::make_shared<std::string>(""); 
+    std::shared_ptr<bool> grep_requested = std::make_shared<bool>(false);
+    std::shared_ptr<bool> grep_called = std::make_shared<bool>(false);
+    std::shared_ptr<std::string> pattern = std::make_shared<std::string>(); 
+
+    auto grep_impl = [&parser] (std::string const& filename, std::string const& pattern) {
+        if (filename.empty()) {
+            std::cerr << "Missing filename" << std::endl; 
+            parser.display_help(conventions); 
+            exit(-1); 
+        }
+        std::ifstream file(filename);
+        if (!file.is_open()) {
+            std::cerr << "Could not open file: \"" << filename << '"' << std::endl; 
+            exit(-1);
+        }
+        std::string line;
+        while (std::getline(file, line)) {
+            if (line.find(pattern) != std::string::npos) {
+                std::cout << line << std::endl;
+            }
+        }
+        file.close();
     }; 
 
-    parser.add_argument("h", "help", "Displays this help text.", argument_parser::helpers::make_non_parametered_action([&parser, conventions]{
+    const auto filename_action = argument_parser::helpers::make_parametered_action<std::string>([filename, grep_called, grep_requested, &grep_impl, pattern](std::string const& file_name) {
+        std::ifstream file(file_name);
+        if (!file.is_open()) {
+            throw std::runtime_error("Could not open file");
+        }
+        *filename = file_name;
+        file.close();
+        if (*grep_requested && !(*grep_called)) {
+            grep_impl(file_name, *pattern);
+            *grep_called = true; 
+        }
+    });
+
+    const auto grep = argument_parser::helpers::make_parametered_action<std::string>([filename, &parser, &grep_impl, grep_requested, grep_called, pattern](std::string const& p) {
+        *grep_requested = true;
+        if (!filename || filename -> empty()) {
+            *grep_called = false; 
+            *pattern = p; 
+            return; 
+        }
+        grep_impl(*filename,  p);
+        *grep_called = true; 
+    });
+
+    return std::pair { filename_action, grep };
+}
+
+int main() {
+    std::vector<std::string> fake_args = { "-g", "add", "-f", "src/main.cpp" };
+    auto parser = argument_parser::fake_parser{"test", std::move(fake_args)};
+    auto [file, grep] = make_grep_action(parser); 
+    parser.add_argument("e", "echo", "echoes given variable", echo, false);
+    parser.add_argument("f", "file", "File to grep, required only if using grep", file, false);
+    parser.add_argument("g", "grep", "Grep pattern, required only if using grep", grep, false);
+    parser.add_argument("c", "cat", "Prints the content of the file", cat, false);
+    parser.add_argument("h", "help", "Displays this help text.", argument_parser::helpers::make_non_parametered_action([&parser]{
         parser.display_help(conventions); 
     }), false);
 
     parser.handle_arguments(conventions);
 
-    
-
     return 0; 
 }