From 723cd3440bacc0f080f33f0b51fb8116eec347a7 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Wed, 11 Oct 2017 18:07:47 -0700
Subject: [PATCH] ircd::json: Towards uniform defined().

---
 include/ircd/json/member.h | 7 +++++++
 include/ircd/json/value.h  | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/include/ircd/json/member.h b/include/ircd/json/member.h
index 4cbdff14c..91e4b790e 100644
--- a/include/ircd/json/member.h
+++ b/include/ircd/json/member.h
@@ -58,6 +58,7 @@ struct ircd::json::member
 	friend bool operator!=(const member &a, const string_view &b);
 	friend bool operator<(const member &a, const string_view &b);
 
+	friend bool defined(const member &);
 	friend size_t serialized(const member &);
 	friend string_view stringify(mutable_buffer &, const member &);
 	friend std::ostream &operator<<(std::ostream &, const member &);
@@ -132,3 +133,9 @@ ircd::json::operator==(const member &a, const string_view &b)
 {
 	return string_view{a.first.string, a.first.len} == b;
 }
+
+inline bool
+ircd::json::defined(const member &a)
+{
+	return defined(a.second);
+}
diff --git a/include/ircd/json/value.h b/include/ircd/json/value.h
index e47b5860a..b2fdfce0a 100644
--- a/include/ircd/json/value.h
+++ b/include/ircd/json/value.h
@@ -129,6 +129,7 @@ struct ircd::json::value
 	friend bool operator>(const value &a, const value &b);
 
 	friend enum type type(const value &a);
+	friend bool defined(const value &);
 	friend size_t serialized(const value &);
 	friend string_view stringify(mutable_buffer &, const value &);
 	friend std::ostream &operator<<(std::ostream &, const value &);
@@ -332,6 +333,12 @@ noexcept
 	return *this;
 }
 
+inline bool
+ircd::json::defined(const value &a)
+{
+	return !a.undefined();
+}
+
 inline enum ircd::json::type
 ircd::json::type(const value &a)
 {