allwpilib/upstream_utils/json_patches/0017-Add-operator.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Johnson <johnson.peter@gmail.com>
Date: Fri, 3 Apr 2026 22:54:14 -0700
Subject: [PATCH 17/25] Add operator==

---
 json.cpp | 26 ++++++++++++++++++++++++++
 json.h   |  6 ++++++
 2 files changed, 32 insertions(+)

diff --git a/json.cpp b/json.cpp
index 49fbf92ea6e67e771f051f10b65ac795351c6f3d..40479bc266390f015e291b737b5751522dac76ac 100644
--- a/json.cpp
+++ b/json.cpp
@@ -1361,4 +1361,30 @@ json::StatusToString(json::Status status)
     }
 }
 
+bool
+operator==(const json& lhs, const json& rhs) {
+    if (lhs.type_ != rhs.type_)
+        return false;
+    switch (lhs.type_) {
+        case json::Type::Null:
+            return true;
+        case json::Type::String:
+            return lhs.string_value == rhs.string_value;
+        case json::Type::Bool:
+            return lhs.bool_value == rhs.bool_value;
+        case json::Type::Int:
+            return lhs.long_value == rhs.long_value;
+        case json::Type::Float:
+            return lhs.float_value == rhs.float_value;
+        case json::Type::Double:
+            return lhs.double_value == rhs.double_value;
+        case json::Type::Array:
+            return lhs.array_value == rhs.array_value;
+        case json::Type::Object:
+            return lhs.object_value == rhs.object_value;
+        default:
+            ON_LOGIC_ERROR("Unhandled JSON type during equality comparison.");
+    }
+}
+
 } // namespace wpi::util
diff --git a/json.h b/json.h
index f42ba9c135cb76a1b0bc31f9e2c03b1ed7dce749..fbc3fb959f71f6acc344f26247597959807d23bb 100644
--- a/json.h
+++ b/json.h
@@ -28,6 +28,7 @@ namespace wpi::util {
 
 class json
 {
+    friend bool operator==(const json& lhs, const json& rhs);
   public:
     using array_t = std::vector<json>;
     using object_t = wpi::util::StringMap<json>;
@@ -241,4 +242,9 @@ class json
     static Status parse(json&, const char*&, const char*, int, int);
 };
 
+bool operator==(const json& lhs, const json& rhs);
+inline bool operator!=(const json& lhs, const json& rhs) {
+    return !(lhs == rhs);
+}
+
 } // namespace wpi::util