feat: add support for reasons on assertion failure (#172)

Author: edusperoni

NativeScript/runtime/Helpers.h

@@ -65,7 +65,7 @@ const std::string GetCurrentScriptUrl(v8::Isolate* isolate);
 
 bool LiveSync(v8::Isolate* isolate);
 
-void Assert(bool condition, v8::Isolate* isolate = nullptr);
+void Assert(bool condition, v8::Isolate* isolate = nullptr, std::string const &reason = std::string());
 
 }
 

NativeScript/runtime/Helpers.mm

@@ -657,7 +657,7 @@
     return true;
 }
 
-void tns::Assert(bool condition, Isolate* isolate) {
+void tns::Assert(bool condition, Isolate* isolate, std::string const &reason) {
     if (!RuntimeConfig.IsDebug) {
         assert(condition);
         return;
@@ -676,6 +676,9 @@
 
     if (isolate == nullptr) {
         Log(@"====== Assertion failed ======");
+        if(!reason.empty()) {
+            Log(@"Reason: %s", reason.c_str());
+        }
         Log(@"Native stack trace:");
         LogBacktrace();
         assert(false);