enable __PRETTY_FUNCTION__ trimming for testing

entity/name-of.hpp

@@ -1,4 +1,5 @@
 #pragma once
+#include "compat/assert.hpp"
 #include <Corrade/Containers/StringView.h>
 
 #if defined _MSC_VER
@@ -7,18 +8,38 @@
 #define FM_PRETTY_FUNCTION __PRETTY_FUNCTION__
 #endif
 
-template<typename T>
-static constexpr auto mangled_name() { // NOLINT(bugprone-reserved-identifier)
+template<typename T> static constexpr auto mangled_name() {
     using namespace Corrade::Containers;
+    using Corrade::Containers::Literals::operator ""_s;
     using SVF = StringViewFlag;
     constexpr auto my_strlen = [](const char* str) constexpr -> size_t {
         const char* start = str;
         for (; *str; str++)
             ;
         return (size_t)(str - start);
     };
-    const char* str = FM_PRETTY_FUNCTION;
-    return StringView { str, my_strlen(str), SVF::Global|SVF::NullTerminated };
+    const char* str_ = FM_PRETTY_FUNCTION;
+    auto str = StringView { str_, my_strlen(str_), SVF::Global|SVF::NullTerminated };
+#if 1
+    {
+#ifdef _MSC_VER
+        constexpr StringView prefix = "auto __cdecl mangled_name<"_s, suffix = ">(void)"_s;
+#elif defined __clang__
+        constexpr StringView prefix = "auto mangled_name() [T = "_s, suffix = "]"_s;
+#else
+        constexpr StringView prefix = "constexpr auto mangled_name() [with T = "_s, suffix = "]"_s;
+#endif
+
+        fm_assert(str.size() > prefix.size() + suffix.size());
+        for (auto i = 0uz; i < prefix.size(); i++)
+            fm_assert(str[i] == prefix[i]);
+        str = StringView{ str.data() + prefix.size(), str.size() - prefix.size() };
+        for (auto i = 0uz; i < suffix.size(); i++)
+            fm_assert(str[str.size() - 1 - i] == suffix[suffix.size() - 1 - i]);
+        str = StringView{ str.data(), str.size() - suffix.size() };
+    }
+#endif
+    return str;
 }
 
 template<typename T> constexpr inline auto name_of = mangled_name<T>();