add config support

includes/tomlc17-R260618/simple/simplecpp.cpp

@@ -0,0 +1,58 @@
+/*
+ * Parse the config file simple.toml:
+ *
+ * [server]
+ * host = "www.example.com"
+ * port = [8080, 8181, 8282]
+ *
+ */
+#include "../src/tomlcpp.hpp"
+#include <iostream>
+#include <vector>
+
+using std::cout;
+
+static void error(const char *msg) {
+  fprintf(stderr, "ERROR: %s\n", msg);
+  exit(1);
+}
+
+int main() {
+  // Parse the toml file
+  toml::Result result = toml::parse_file_ex("simple.toml");
+
+  // Check for parse error
+  if (!result.ok()) {
+    error(result.errmsg());
+  }
+
+  // Extract values
+  std::string host;
+  std::vector<int64_t> port;
+
+  try {
+    // use the Datum::get() method
+    host = result.get({"server", "host"})->as_str().value();
+  } catch (const std::bad_optional_access &ex) {
+    error("missing or invalid 'server.host' property in config");
+  }
+
+  try {
+    // use the Datum::seek() method
+    port = result.seek("server.port")->as_intvec().value();
+  } catch (const std::bad_optional_access &ex) {
+    error("missing or invalid 'server.port' property in config");
+  }
+
+  // Print values
+  cout << "server.host = " << host << "\n";
+  cout << "server.port = [";
+  for (size_t i = 0; i < port.size(); i++) {
+    cout << (i ? ", " : "") << port[i];
+  }
+  cout << "]\n";
+
+  // Done! No need to call toml_free(). Result::~Result() will handle
+  // destruction.
+  return 0;
+}