[Global]: loading init

deps/json/tools/gdb_pretty_printer/nlohmann-json.py

@@ -0,0 +1,32 @@
+import gdb
+import re
+
+ns_pattern = re.compile(r'nlohmann(::json_abi(?P<tags>\w*)(_v(?P<v_major>\d+)_(?P<v_minor>\d+)_(?P<v_patch>\d+))?)?::(?P<name>.+)')
+class JsonValuePrinter:
+    "Print a json-value"
+
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        if self.val.type.strip_typedefs().code == gdb.TYPE_CODE_FLT:
+            return ("%.6f" % float(self.val)).rstrip("0")
+        return self.val
+
+def json_lookup_function(val):
+    if m := ns_pattern.fullmatch(str(val.type.strip_typedefs().name)):
+      name = m.group('name')
+      if name and name.startswith('basic_json<') and name.endswith('>'):
+          m = ns_pattern.fullmatch(str(val['m_type']))
+          t = m.group('name')
+          if t and t.startswith('detail::value_t::'):
+              try:
+                  union_val = val['m_value'][t.removeprefix('detail::value_t::')]
+                  if union_val.type.code == gdb.TYPE_CODE_PTR:
+                      return gdb.default_visualizer(union_val.dereference())
+                  else:
+                      return JsonValuePrinter(union_val)
+              except Exception:
+                  return JsonValuePrinter(val['m_type'])
+
+gdb.pretty_printers.append(json_lookup_function)