feat: add String.type property to retrieve the string type

Close #443

Signed-off-by: Frost Ming <[email protected]>

Author: frostming

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Added
 
 - Custom encoders can now receive `_parent` and `_sort_keys` parameters to enable proper encoding of nested structures. ([#429](https://github.com/python-poetry/tomlkit/issues/429))
+- Add `String.type` property to get the string type. ([#443](https://github.com/python-poetry/tomlkit/issues/443))
 
 ## Fixed
 

tomlkit/items.py

@@ -1867,6 +1867,10 @@ def value(self) -> str:
     def as_string(self) -> str:
         return f"{self._t.value}{decode(self._original)}{self._t.value}"
 
+    @property
+    def type(self) -> StringType:
+        return self._t
+
     def __add__(self: ItemT, other: str) -> ItemT:
         if not isinstance(other, str):
             return NotImplemented