From 0bd7b99fbf813415b9a0217eaa2a4e8f6f74e1ea Mon Sep 17 00:00:00 2001
From: Zuhaitz Méndez Fernández de Aránguiz <zuhaitz@debian>
Date: Sun, 25 Jan 2026 13:44:24 +0000
Subject: Fix for #111

---
 src/parser/parser_decl.c | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

(limited to 'src/parser/parser_decl.c')

diff --git a/src/parser/parser_decl.c b/src/parser/parser_decl.c
index bd56350..5d5af1e 100644
--- a/src/parser/parser_decl.c
+++ b/src/parser/parser_decl.c
@@ -207,17 +207,43 @@ char *patch_self_args(const char *args, const char *struct_name)
     {
         return NULL;
     }
-    char *new_args = xmalloc(strlen(args) + strlen(struct_name) + 10);
+
+    // Sanitize struct name for C usage (Vec<T> -> Vec_T)
+    char *safe_name = xmalloc(strlen(struct_name) + 1);
+    int j = 0;
+    for (int i = 0; struct_name[i]; i++)
+    {
+        if (struct_name[i] == '<')
+        {
+            safe_name[j++] = '_';
+        }
+        else if (struct_name[i] == '>')
+        {
+            // skip
+        }
+        else if (struct_name[i] == ' ')
+        {
+            // skip
+        }
+        else
+        {
+            safe_name[j++] = struct_name[i];
+        }
+    }
+    safe_name[j] = 0;
+
+    char *new_args = xmalloc(strlen(args) + strlen(safe_name) + 10);
 
     // Check if it starts with "void* self"
     if (strncmp(args, "void* self", 10) == 0)
     {
-        sprintf(new_args, "%s* self%s", struct_name, args + 10);
+        sprintf(new_args, "%s* self%s", safe_name, args + 10);
     }
     else
     {
         strcpy(new_args, args);
     }
+    free(safe_name);
     return new_args;
 }
 // Helper for Value-Returning Defer
-- 
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