diff --git a/prompt_control/macros.py b/prompt_control/macros.py
new file mode 100644
index 0000000..18a4954
--- /dev/null
+++ b/prompt_control/macros.py
@@ -0,0 +1,81 @@
+# vim: sw=4 ts=4
+from __future__ import annotations
+
+import logging
+import re
+
+from .utils import find_closing_paren, get_function
+
+logging.basicConfig()
+log = logging.getLogger("comfyui-prompt-control")
+
+
+def parse_search(search):
+    arg_start = search.find("(")
+    args = ""
+    name = search.strip()
+    if arg_start > 0:
+        arg_end = find_closing_paren(search, arg_start + 1)
+        if arg_end < 0:
+            arg_end = len(search)
+        name = search[:arg_start].strip()
+        args = search[arg_start + 1 : arg_end]
+
+    if not name:
+        return None
+    args = args.strip()
+    # If using the form DEF(F()=$1) then the default value of $1 is the empty string
+    args = [a.strip() for a in args.split(";")] if arg_start > 0 else []
+    return name, args
+
+
+def expand_macros(text):
+    text, defs = get_function(text, "DEF", defaults=None)
+    res = text
+    prevres = text
+    replacements = []
+    for d in defs:
+        if not d.args:
+            continue
+        r = d.args[0].split("=", 1)
+        search = parse_search(r[0].strip())
+        if not search or len(r) != 2:
+            log.warning("Ignoring invalid DEF(%s)", d)
+            continue
+        replacements.append((search, r[1].strip()))
+    iterations = 0
+    while True:
+        iterations += 1
+        if iterations > 10:
+            raise ValueError("Unable to resolve DEFs, make sure there are no cycles!")
+            return text
+        for search, replace in replacements:
+            res = substitute_defcall(res, search, replace)
+        if res == prevres:
+            break
+        prevres = res
+    if res.strip() != text.strip():
+        res = res.strip()
+        log.info("DEFs expanded to: %s", res)
+    return res
+
+
+def substitute_defcall(text, search, replace):
+    name, default_args = search
+    text, defns = get_function(text, name, defaults=None, placeholder=f"DEFNCALL{name}", require_args=False)
+    for i, d in enumerate(defns):
+        ph = d.placeholder
+        assert ph is not None, "This is a bug"
+        parameters = d.args
+        paramvals = []
+        if parameters:
+            paramvals = [x.strip() for x in parameters[0].split(";")]
+        r = replace
+        for i, v in enumerate(paramvals):
+            r = re.sub(rf"\${i + 1}\b", v, r)
+
+        for i, v in enumerate(default_args):
+            r = re.sub(rf"\${i + 1}\b", v, r)
+
+        text = text.replace(ph, r)
+    return text
diff --git a/prompt_control/parser.py b/prompt_control/parser.py
index ded13ad..676125f 100644
--- a/prompt_control/parser.py
+++ b/prompt_control/parser.py
@@ -2,14 +2,13 @@
 from __future__ import annotations
 
 import logging
-import re
 from functools import lru_cache
 from math import ceil
 from typing import TypeAlias
 
 import lark
 
-from .utils import find_closing_paren, get_function
+from .macros import expand_macros
 
 logging.basicConfig()
 log = logging.getLogger("comfyui-prompt-control")
@@ -414,77 +413,6 @@ class PromptSchedule:
         return len(self.parsed_prompt) - 1, self.parsed_prompt[-1]
 
 
-def parse_search(search):
-    arg_start = search.find("(")
-    args = ""
-    name = search.strip()
-    if arg_start > 0:
-        arg_end = find_closing_paren(search, arg_start + 1)
-        if arg_end < 0:
-            arg_end = len(search)
-        name = search[:arg_start].strip()
-        args = search[arg_start + 1 : arg_end]
-
-    if not name:
-        return None
-    args = args.strip()
-    # If using the form DEF(F()=$1) then the default value of $1 is the empty string
-    args = [a.strip() for a in args.split(";")] if arg_start > 0 else []
-    return name, args
-
-
-def expand_macros(text):
-    text, defs = get_function(text, "DEF", defaults=None)
-    res = text
-    prevres = text
-    replacements = []
-    for d in defs:
-        if not d.args:
-            continue
-        r = d.args[0].split("=", 1)
-        search = parse_search(r[0].strip())
-        if not search or len(r) != 2:
-            log.warning("Ignoring invalid DEF(%s)", d)
-            continue
-        replacements.append((search, r[1].strip()))
-    iterations = 0
-    while True:
-        iterations += 1
-        if iterations > 10:
-            raise ValueError("Unable to resolve DEFs, make sure there are no cycles!")
-            return text
-        for search, replace in replacements:
-            res = substitute_defcall(res, search, replace)
-        if res == prevres:
-            break
-        prevres = res
-    if res.strip() != text.strip():
-        res = res.strip()
-        log.info("DEFs expanded to: %s", res)
-    return res
-
-
-def substitute_defcall(text, search, replace):
-    name, default_args = search
-    text, defns = get_function(text, name, defaults=None, placeholder=f"DEFNCALL{name}", require_args=False)
-    for i, d in enumerate(defns):
-        ph = d.placeholder
-        assert ph is not None, "This is a bug"
-        parameters = d.args
-        paramvals = []
-        if parameters:
-            paramvals = [x.strip() for x in parameters[0].split(";")]
-        r = replace
-        for i, v in enumerate(paramvals):
-            r = re.sub(rf"\${i + 1}\b", v, r)
-
-        for i, v in enumerate(default_args):
-            r = re.sub(rf"\${i + 1}\b", v, r)
-
-        text = text.replace(ph, r)
-    return text
-
-
 @lru_cache
 def parse_prompt_schedules(prompt, **kwargs):
     prompt = expand_macros(prompt)