Feature/detect casting comb token from converters (#784)

dynaconf/utils/parse_conf.py

@@ -309,7 +309,8 @@ def _parse_conf_data(data, tomlfy=False, box_settings=None):
     ):
         # Check combination token is used
         comb_token = re.match(
-            r"^@(str|int|float|bool|json) @(jinja|format)", data
+            f"^({'|'.join(converters.keys())}) @(jinja|format)",
+            data,
         )
         if comb_token:
             tokens = comb_token.group(0)

example/custom_cast_token/app.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from dynaconf import Dynaconf
+from dynaconf.utils import parse_conf
+
+settings = Dynaconf(
+    envvar_prefix="DYNACONF",
+    settings_files=["settings.toml"],
+    environments=True,
+)
+
+# Add a custom casting token casting string to pathlib.Path object
+parse_conf.converters["@path"] = (
+    lambda value: value.set_casting(Path)
+    if isinstance(value, parse_conf.Lazy)
+    else Path(value)
+)
+
+assert isinstance(settings.parent, Path)
+assert isinstance(settings.child, Path)
+assert str(settings.child).find("@format") == -1

example/custom_cast_token/settings.toml

@@ -0,0 +1,3 @@
+[default]
+parent = "@path @format {env[HOME]}/parent"
+child = "@path @format {this.parent}/child"