add diff_pattern as attribute of Config class

Author: HenriqueAssumpcao

openevolve/config.py

@@ -400,6 +400,7 @@ class Config:
     # Evolution settings
     diff_based_evolution: bool = True
     max_code_length: int = 10000
+    diff_pattern: str = r"<<<<<<< SEARCH\n(.*?)=======\n(.*?)>>>>>>> REPLACE"
 
     # Early stopping settings
     early_stopping_patience: Optional[int] = None

openevolve/iteration.py

@@ -84,14 +84,14 @@ async def run_iteration_with_shared_db(
 
         # Parse the response
         if config.diff_based_evolution:
-            diff_blocks = extract_diffs(llm_response)
+            diff_blocks = extract_diffs(llm_response, config.diff_pattern)
 
             if not diff_blocks:
                 logger.warning(f"Iteration {iteration+1}: No valid diffs found in response")
                 return None
 
             # Apply the diffs
-            child_code = apply_diff(parent.code, llm_response)
+            child_code = apply_diff(parent.code, llm_response, config.diff_pattern)
             changes_summary = format_diff_summary(diff_blocks)
         else:
             # Parse full rewrite

openevolve/process_parallel.py

@@ -204,13 +204,13 @@ def _run_iteration_worker(
         if _worker_config.diff_based_evolution:
             from openevolve.utils.code_utils import apply_diff, extract_diffs, format_diff_summary
 
-            diff_blocks = extract_diffs(llm_response)
+            diff_blocks = extract_diffs(llm_response, _worker_config.diff_pattern)
             if not diff_blocks:
                 return SerializableResult(
                     error=f"No valid diffs found in response", iteration=iteration
                 )
 
-            child_code = apply_diff(parent.code, llm_response)
+            child_code = apply_diff(parent.code, llm_response, _worker_config.diff_pattern)
             changes_summary = format_diff_summary(diff_blocks)
         else:
             from openevolve.utils.code_utils import parse_full_rewrite