feat add PrettyName

include/sled/reflect/reflect.h

@@ -4,9 +4,11 @@
  * @license  : MIT
  **/
 
-#pragma
 #ifndef SLED_REFLECT_REFLECT_H
 #define SLED_REFLECT_REFLECT_H
+#pragma
+#include <cxxabi.h>
+#include <string>
 
 #if !defined(__NO_META_PARSER__) && !defined(__META_PARSER__)
 #define __META_PARSER__
@@ -22,4 +24,49 @@
 #define METHOD()
 #endif
 
+namespace sled {
+
+namespace {
+
+inline std::string
+RemoveUnusedSpace(const std::string &str, const std::string &chars = "[]()<>*&:")
+{
+    std::string result = str.substr(str.find_first_not_of(' '));
+    result = result.substr(0, result.find_last_not_of(' ') + 1);
+    for (size_t i = 0; i < result.size();) {
+        if (result[i] == ' ') {
+            bool left_is_chars = i > 0 && chars.find(result[i - 1]) != std::string::npos;
+            bool right_is_chars = (i + 1 < str.size()) && chars.find(result[i + 1]) != std::string::npos;
+            if (left_is_chars || right_is_chars) {
+                result.erase(i, 1);
+                continue;
+            }
+        }
+        ++i;
+    }
+    return result;
+}
+
+template<typename T, typename U = typename std::decay<T>::type>
+inline std::string
+PrettyNameImpl()
+{
+    const char *name = typeid(U).name();
+    int status;
+    char *res = abi::__cxa_demangle(name, nullptr, nullptr, &status);
+    std::string pretty_name = res;
+    free(res);
+    return RemoveUnusedSpace(pretty_name);
+}
+}// namespace
+
+template<typename T>
+inline const char *
+PrettyName()
+{
+    static std::string pretty_name = PrettyNameImpl<T>();
+    return pretty_name.c_str();
+}
+}// namespace sled
+
 #endif// SLED_REFLECT_REFLECT_H