Make CLR errors more informative

Author: filmor

clr_loader/util/__init__.py

@@ -1,4 +1,36 @@
+class ClrError(Exception):
+    def __init__(self, hresult, name=None, message=None, comment=None):
+        self.hresult = hresult
+        self.name = name
+        self.message = message
+        self.comment = comment
+
+    def __str__(self):
+        if self.message:
+            return f"{hex(self.hresult)}: {self.name} => {self.message}"
+        elif self.name:
+            return f"{hex(self.hresult)}: {self.name}"
+        else:
+            return f"{hex(self.hresult)}"
+
+    
+    def __repr__(self):
+        return f"<ClrError {str(self)}>"
+
+
 def check_result(err_code):
     if err_code < 0:
-        raise RuntimeError(hex(err_code & 0xFFFFFFFF))
+        hresult = err_code & 0xFFFFFFFF
+
+        error = get_coreclr_error(hresult)
+        if not error:
+            error = get_hostfxr_error(hresult)
+
+        if not error:
+            error = ClrError(hresult)
+
+        raise error
+
 
+from .coreclr_errors import get_coreclr_error
+from .hostfxr_errors import get_hostfxr_error