add vctest (WIP)

src/util/ArgsReader.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <string>
+#include <stdexcept>
+#include <cstring>
+
+namespace util {
+    class ArgsReader {
+        const char* last = "";
+        char** argv;
+        int argc;
+        int pos = 0;
+    public:
+        ArgsReader(int argc, char** argv) : argv(argv), argc(argc) {
+        }
+
+        void skip() {
+            pos++;
+        }
+
+        bool hasNext() const {
+            return pos < argc && std::strlen(argv[pos]);
+        }
+
+        bool isKeywordArg() const {
+            return last[0] == '-';
+        }
+
+        std::string next() {
+            if (pos >= argc) {
+                throw std::runtime_error("unexpected end");
+            }
+            last = argv[pos];
+            return argv[pos++];
+        }
+    };
+}