[gjs] arg: Improve debugging of numeric marshal conversions

[Philip Chimento <pchimento src gnome org>]

commit 17217a35238f1001ab2b545b9bddfe4689bf0f38
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Sep 8 18:55:20 2020 +0200

    arg: Improve debugging of numeric marshal conversions

 gi/arg-cache.cpp | 8 ++++++++
 gi/arg.cpp       | 9 ++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)
---
diff --git a/gi/arg-cache.cpp b/gi/arg-cache.cpp
index a2ff1bb3..c053865e 100644
--- a/gi/arg-cache.cpp
+++ b/gi/arg-cache.cpp
@@ -39,6 +39,7 @@
 #include "gi/value.h"
 #include "gjs/byteArray.h"
 #include "gjs/jsapi-util.h"
+#include "util/log.h"
 
 enum ExpectedType {
     OBJECT,
@@ -377,6 +378,13 @@ GJS_JSAPI_RETURN_CONVENTION inline static bool gjs_arg_set_from_js_value(
         return false;
     }
 
+    gjs_debug_marshal(GJS_DEBUG_GFUNCTION, "%s set to value %s (type %s)",
+                      GjsAutoChar(gjs_argument_display_name(
+                                      self->arg_name, GJS_ARGUMENT_ARGUMENT))
+                          .get(),
+                      std::to_string(gjs_arg_get<T>(arg)).c_str(),
+                      Gjs::static_type_name<T>());
+
     return true;
 }
 
diff --git a/gi/arg.cpp b/gi/arg.cpp
index a8ebffa6..df8205fc 100644
--- a/gi/arg.cpp
+++ b/gi/arg.cpp
@@ -1571,13 +1571,20 @@ GJS_JSAPI_RETURN_CONVENTION inline static bool gjs_arg_set_from_js_value(
         if (out_of_range) {
             GjsAutoChar display_name =
                 gjs_argument_display_name(arg_name, arg_type);
-            gjs_throw(cx, "value is out of range for %s (type %s)",
+            gjs_throw(cx, "value %s is out of range for %s (type %s)",
+                      std::to_string(gjs_arg_get<T>(arg)).c_str(),
                       display_name.get(), Gjs::static_type_name<T>());
         }
 
         return false;
     }
 
+    gjs_debug_marshal(
+        GJS_DEBUG_GFUNCTION, "%s set to value %s (type %s)",
+        GjsAutoChar(gjs_argument_display_name(arg_name, arg_type)).get(),
+        std::to_string(gjs_arg_get<T>(arg)).c_str(),
+        Gjs::static_type_name<T>());
+
     return true;
 }