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3rd/CLI11/tests/applications/ensure_utf8.cpp

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+// Copyright (c) 2017-2026, University of Cincinnati, developed by Henry Schreiner
+// under NSF AWARD 1414736 and by the respective contributors.
+// All rights reserved.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <CLI/CLI.hpp>
+#include <cstring>
+#include <iostream>
+
+int main(int argc, char **argv) {
+    CLI::App app{"App description"};
+    char **original_argv = argv;
+    argv = app.ensure_utf8(argv);
+
+#ifdef _WIN32
+    for(int i = 0; i < argc; i++) {
+        if(std::strcmp(argv[i], original_argv[i]) != 0) {
+            std::cerr << argv[i] << "\n";
+            std::cerr << original_argv[i] << "\n";
+            return i + 1;
+        }
+        argv[i][0] = 'x';  // access it to check that it is accessible
+    }
+
+#else
+    (void)argc;
+
+    if(original_argv != argv) {
+        return -1;
+    }
+#endif
+
+    return 0;
+}

3rd/CLI11/tests/applications/ensure_utf8_twice.cpp

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+// Copyright (c) 2017-2026, University of Cincinnati, developed by Henry Schreiner
+// under NSF AWARD 1414736 and by the respective contributors.
+// All rights reserved.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <CLI/CLI.hpp>
+#include <cstring>
+#include <iostream>
+
+int main(int argc, char **argv) {
+    CLI::App app{"App description"};
+    char **original_argv = argv;
+    argv = app.ensure_utf8(argv);
+    argv = app.ensure_utf8(argv);  // completely useless but works ok
+
+#ifdef _WIN32
+    for(int i = 0; i < argc; i++) {
+        if(std::strcmp(argv[i], original_argv[i]) != 0) {
+            std::cerr << argv[i] << "\n";
+            std::cerr << original_argv[i] << "\n";
+            return i + 1;
+        }
+        argv[i][0] = 'x';  // access it to check that it is accessible
+    }
+
+#else
+    (void)argc;
+
+    if(original_argv != argv) {
+        return -1;
+    }
+#endif
+
+    return 0;
+}