From eb4537241406f3f333c0da7a2975e040c8fb807c Mon Sep 17 00:00:00 2001
From: Nicolas Williams <nico@cryptonector.com>
Date: Tue, 31 Dec 2013 23:25:20 -0600
Subject: [PATCH] jv_show() should be able to display invalid values

---
 jv.h       |  2 +-
 jv_print.c | 16 ++++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/jv.h b/jv.h
index b8087adb..7323c32c 100644
--- a/jv.h
+++ b/jv.h
@@ -126,7 +126,7 @@ jv jv_object_iter_value(jv, int);
 
 int jv_get_refcnt(jv);
 
-enum { JV_PRINT_PRETTY = 1, JV_PRINT_ASCII = 2, JV_PRINT_COLOUR = 4, JV_PRINT_SORTED = 8 };
+enum { JV_PRINT_PRETTY = 1, JV_PRINT_ASCII = 2, JV_PRINT_COLOUR = 4, JV_PRINT_SORTED = 8, JV_PRINT_INVALID = 16 };
 void jv_dumpf(jv, FILE *f, int flags);
 void jv_dump(jv, int flags);
 void jv_show(jv, int flags);
diff --git a/jv_print.c b/jv_print.c
index 1d38de8b..f01d6a16 100644
--- a/jv_print.c
+++ b/jv_print.c
@@ -127,7 +127,18 @@ static void jv_dump_term(struct dtoa_context* C, jv x, int flags, int indent, FI
   switch (jv_get_kind(x)) {
   default:
   case JV_KIND_INVALID:
-    assert(0 && "Invalid value");
+    if (flags & JV_PRINT_INVALID) {
+      jv msg = jv_invalid_get_msg(jv_copy(x));
+      if (jv_get_kind(msg) == JV_KIND_STRING) {
+        put_str("<invalid:", F, S);
+        jvp_dump_string(msg, flags | JV_PRINT_ASCII, F, S);
+        put_str(">", F, S);
+      } else {
+        put_str("<invalid>", F, S);
+      }
+    } else {
+      assert(0 && "Invalid value");
+    }
     break;
   case JV_KIND_NULL:
     put_str("null", F, S);
@@ -271,10 +282,11 @@ void jv_dump(jv x, int flags) {
   jv_dumpf(x, stdout, flags);
 }
 
+/* This one is nice for use in debuggers */
 void jv_show(jv x, int flags) {
   if (flags == -1)
     flags = JV_PRINT_PRETTY | JV_PRINT_COLOUR;
-  jv_dumpf(jv_copy(x), stderr, flags);
+  jv_dumpf(jv_copy(x), stderr, flags | JV_PRINT_INVALID);
   fflush(stderr);
 }