interpreter: Introduce StringHolder

Another commit in my quest to rid InterpreterBase from all higher
level object processing logic.

Additionally, there is a a logic change here, since `str.join` now
uses varargs and can now accept more than one argument (and supports
list flattening).

1 files changed, 1 insertions, 3 deletions

diff --git a/mesonbuild/interpreterbase/_unholder.py b/mesonbuild/interpreterbase/_unholder.py
index 202f53b..221c52c 100644
--- a/mesonbuild/interpreterbase/_unholder.py
+++ b/mesonbuild/interpreterbase/_unholder.py
@@ -19,9 +19,7 @@ from ..mesonlib import HoldableObject, MesonBugException
 import typing as T
 
 def _unholder(obj: T.Union[TYPE_var, InterpreterObject]) -> TYPE_var:
-    if isinstance(obj, str):
-        return obj
-    elif isinstance(obj, list):
+    if isinstance(obj, list):
         return [_unholder(x) for x in obj]
     elif isinstance(obj, dict):
         return {k: _unholder(v) for k, v in obj.items()}