From 22e35e6860ba2b32652884188ed8472ee8f78f47 Mon Sep 17 00:00:00 2001
From: Shivampal157 <shivampal60076@gmail.com>
Date: Tue, 3 Feb 2026 03:39:56 +0530
Subject: [PATCH] Fix entry addition logic for keyless match tables

Signed-off-by: Shivampal157 <shivampal60076@gmail.com>
---
 .vscode/c_cpp_properties.json | 38 +++++++++++++++++++++++++++++++++++
 src/bm_sim/match_units.cpp    |  2 +-
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 .vscode/c_cpp_properties.json

diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 000000000..61bc6cebd
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,38 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "${workspaceFolder}/include",
+                "${workspaceFolder}/src/BMI",
+                "${workspaceFolder}/third_party/jsoncpp/include",
+                "${workspaceFolder}/third_party/spdlog"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "windowsSdkVersion": "",
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "windows-clang-x64"
+        },
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "${workspaceFolder}/include",
+                "${workspaceFolder}/src/BMI",
+                "${workspaceFolder}/third_party/jsoncpp/include",
+                "${workspaceFolder}/third_party/spdlog"
+            ],
+            "defines": [],
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "linux-gcc-x64"
+        }
+    ],
+    "version": 4
+}
diff --git a/src/bm_sim/match_units.cpp b/src/bm_sim/match_units.cpp
index 699af024e..c47cfe83d 100644
--- a/src/bm_sim/match_units.cpp
+++ b/src/bm_sim/match_units.cpp
@@ -805,7 +805,7 @@ template<typename V>
 MatchErrorCode
 MatchUnitAbstract<V>::add_entry(const std::vector<MatchKeyParam> &match_key,
                                 V value, entry_handle_t *handle, int priority) {
-  if (this->get_size_key() == 0) return MatchErrorCode::NO_TABLE_KEY;
+  if (this->get_size_key() == 0 && match_key.size()) return MatchErrorCode::NO_TABLE_KEY;
   MatchErrorCode rc = add_entry_(match_key, std::move(value), handle, priority);
   if (rc != MatchErrorCode::SUCCESS) return rc;
   EntryMeta &meta = entry_meta[HANDLE_INTERNAL(*handle)];