example code

CMakeLists.txt

@@ -6,6 +6,8 @@ project(argparse LANGUAGES CXX VERSION 0.1.0.0)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_CXX_STANDARD 11)
 
+add_subdirectory(examples)
+
 # "this command should be in the source directory root for CTest to find the test file"
 enable_testing() 
 add_subdirectory(test)

examples/CMakeLists.txt

@@ -0,0 +1,31 @@
+macro(add_args tgt)
+target_compile_options(
+  ${tgt}
+  PUBLIC
+    -Wall;
+    -Wextra;
+    -Wpedantic;
+    -Wcast-align;
+    -Wdisabled-optimization;
+    -Winit-self;
+    -Wlogical-op;
+    -Wmissing-include-dirs;
+    -Woverloaded-virtual;
+    -Wpointer-arith;
+    -Wshadow;
+    -Wstrict-aliasing;
+    -Wswitch-enum;
+    -Wundef;
+    -Wvla;
+    -Wformat=2;
+)
+endmacro()
+
+macro(add_example EXE SRCS)
+  add_executable(${EXE} ${SRCS})
+  add_args(${EXE})
+  target_include_directories(${EXE} SYSTEM PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../include)
+endmacro()
+
+add_example(example1 example1.cpp)
+

examples/example1.cpp

@@ -0,0 +1,45 @@
+#include "argparse/argparse.hpp"
+
+int main(int argc, char **argv) {
+
+  // A parser object
+  Parser p;
+
+  // Program data corresponding to flags, options, and positional arguments
+  bool verbose = false;
+  std::string toPrint;
+  std::string maybePrint;
+  int repeats = 1;
+
+  // Inform the parser of the program data.
+  // It will do type-specific conversion
+  p.add_option(repeats, "--repeat");
+  p.add_flag(verbose, "--verbose", "-v");
+  p.add_positional(toPrint)->required();
+  auto psnl = p.add_positional(maybePrint);
+
+  // If there was an error during parsing, report it.
+  if (!p.parse(argc, argv)) {
+    std::cerr << p.help();
+    exit(EXIT_FAILURE);
+  }
+
+  // Execute the program logic
+  if (verbose) {
+    std::cerr << "about to print '" << toPrint << "' " << repeats << " times";
+    if (psnl->found()) {
+      std::cerr << ", then '" << maybePrint << "'";
+    }
+    std::cerr << std::endl;
+  }
+
+  for (int i = 0; i < repeats; ++i) {
+    std::cout << toPrint;
+  }
+  if (psnl->found()) {
+    std::cout << maybePrint;
+  }
+  std::cout << std::endl;
+
+  return 0;
+}