Add the invalid value to the type error exception message

src/js_object_accessor.hpp

@@ -22,8 +22,6 @@
 #include "js_realm_object.hpp"
 #include "js_schema.hpp"
 
-#include "util/format.hpp"
-
 namespace realm {
 class List;
 class Object;
@@ -65,8 +63,9 @@ public:
         ValueType value = Object::get_property(m_ctx, object, prop_name);
         const auto& prop = m_object_schema.persisted_properties[prop_index];
         if (!Value::is_valid_for_property(m_ctx, value, prop)) {
-            throw TypeErrorException(util::format("%1.%2", m_object_schema.name, prop.name),
-                                     js_type_name_for_property_type(prop.type));
+            throw TypeErrorException(m_object_schema.name, prop.name,
+                                     js_type_name_for_property_type(prop.type),
+                                     print(value));
         }
         return value;
     }
@@ -121,7 +120,7 @@ public:
     void will_change(realm::Object&, realm::Property const&) { }
     void did_change() { }
 
-    std::string print(ValueType const&) { return "not implemented"; }
+    std::string print(ValueType const& v) { return Value::to_string(m_ctx, v); }
 
 private:
     ContextType m_ctx;

src/js_realm_object.hpp

@@ -127,12 +127,13 @@ bool RealmObjectClass<T>::set_property(ContextType ctx, ObjectType object, const
         return false;
     }
 
+    NativeAccessor<T> accessor(ctx, realm_object->realm(), realm_object->get_object_schema());
     if (!Value::is_valid_for_property(ctx, value, *prop)) {
-        throw TypeErrorException(util::format("%1.%2", realm_object->get_object_schema().name, property_name),
-                                 js_type_name_for_property_type(prop->type));
+        throw TypeErrorException(realm_object->get_object_schema().name, property_name,
+                                 js_type_name_for_property_type(prop->type),
+                                 accessor.print(value));
     }
 
-    NativeAccessor<T> accessor(ctx, realm_object->realm(), realm_object->get_object_schema());
     realm_object->set_property_value(accessor, property_name, value, true);
     return true;
 }

src/js_types.hpp

@@ -26,6 +26,7 @@
 #include <vector>
 
 #include <realm/binary_data.hpp>
+#include <realm/string_data.hpp>
 #include <realm/util/to_string.hpp>
 
 #if defined(__GNUC__) && !(defined(DEBUG) && DEBUG)
@@ -80,18 +81,16 @@ struct Context {
 
 class TypeErrorException : public std::invalid_argument {
 public:
-    std::string const& prefix() const { return m_prefix; }
-    std::string const& type() const { return m_type; }
+    TypeErrorException(StringData object_type, StringData property,
+                       std::string const& type, std::string const& value)
+    : std::invalid_argument(util::format("%1.%2 must be of type '%3', got (%4)",
+                                         object_type, property, type, value))
+    {}
 
-    TypeErrorException(std::string prefix, std::string type) : 
-        std::invalid_argument(prefix + " must be of type: " + type),
-        m_prefix(std::move(prefix)),
-        m_type(std::move(type)) 
-        {}
-
-private:
-    std::string m_prefix;
-    std::string m_type;
+    TypeErrorException(const char *name, std::string const& type, std::string const& value)
+    : std::invalid_argument(util::format("%1 must be of type '%2', got (%3)",
+                                         name ? name : "JS value", type, value))
+    {}
 };
 
 template<typename T>
@@ -138,8 +137,7 @@ struct Value {
 #define VALIDATED(return_t, type) \
     static return_t validated_to_##type(ContextType ctx, const ValueType &value, const char *name = nullptr) { \
         if (!is_##type(ctx, value)) { \
-            std::string prefix = name ? std::string("'") + name + "'" : "JS value"; \
-            throw TypeErrorException(prefix, #type); \
+            throw TypeErrorException(name, #type, to_string(ctx, value)); \
         } \
         return to_##type(ctx, value); \
     }