modernize code

PCCcompiler/utils.cpp

@@ -0,0 +1,8 @@
+#include "utils.h"
+
+std::string trim(const std::string& str) {
+    size_t first = str.find_first_not_of(" \t");
+    if (first == std::string::npos) return "";
+    size_t last = str.find_last_not_of(" \t");
+    return str.substr(first, last - first + 1);
+}