From 6920a601619b5bbbec7b01d722868c82e9fd1708 Mon Sep 17 00:00:00 2001
From: Fredrik Ekre <ekrefredrik@gmail.com>
Date: Wed, 18 Mar 2026 12:56:41 +0100
Subject: [PATCH] C: don't output argument names without name

---
 src/c.jl                        | 7 +++++--
 test/bindinginfo_libsimple.json | 9 +++++++++
 test/runtests.jl                | 1 +
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/c.jl b/src/c.jl
index f4bf578..827cf8c 100644
--- a/src/c.jl
+++ b/src/c.jl
@@ -72,7 +72,10 @@ function wrapper(dest::CProject, abi_info::ABIInfo)
                     print(f, ", ")
                 end
                 ft = mangle_c!(typedict, arg.type, typeinfo)
-                print(f, ft, " ", sanitize_for_c(arg.name))
+                print(f, ft)
+                if !(isempty(arg.name) || arg.name == "#unused#")
+                    print(f, " ", sanitize_for_c(arg.name))
+                end
                 if arg.isva
                     print(f, "...")
                 end
@@ -80,7 +83,7 @@ function wrapper(dest::CProject, abi_info::ABIInfo)
             print(f, ");\n")
         end
 
-        println(f, "#endif // $libvar")
+        println(f, "\n#endif // $libvar")
     end
 end
 
diff --git a/test/bindinginfo_libsimple.json b/test/bindinginfo_libsimple.json
index 005e688..5d4cd9c 100644
--- a/test/bindinginfo_libsimple.json
+++ b/test/bindinginfo_libsimple.json
@@ -8,6 +8,15 @@
       ],
       "returns": { "type_id": 6 }
     },
+    {
+      "symbol": "unnamed_arguments",
+      "name": "unnamed_arguments(::Int32, ::Int32)",
+      "arguments": [
+        { "name": "", "type_id": 4 },
+        { "name": "#unused#", "type_id": 4 }
+      ],
+      "returns": { "type_id": 4 }
+    },
     {
       "symbol": "copyto_and_sum",
       "name": "copyto_and_sum(fromto::CVectorPair{Float32})",
diff --git a/test/runtests.jl b/test/runtests.jl
index 32790a6..a2de3d8 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -180,6 +180,7 @@ end
             @test occursin("CVector_Float32 to;", content)
             @test occursin("float copyto_and_sum(CVectorPair_Float32 fromto);", content)
             @test occursin("int32_t countsame(MyTwoVec* list, int32_t n);", content)
+            @test occursin("int32_t unnamed_arguments(int32_t, int32_t);", content)
         end
     end
 end