[PATCH v2 1/5] dts: add find float method to text parser

[Andrew Bailey <abailey@iol.unh.edu>]

Currently, there is no way to gather floats from text using the parser.
Adding a new method to find floats will allow testsuites to utilize
valuable float values that are output from applications.

Signed-off-by: Andrew Bailey <abailey@iol.unh.edu>
---
 dts/framework/parser.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/dts/framework/parser.py b/dts/framework/parser.py
index 4170cdb1dd..3075c36857 100644
--- a/dts/framework/parser.py
+++ b/dts/framework/parser.py
@@ -220,6 +220,34 @@ def find_int(
 
         return TextParser.wrap(TextParser.find(pattern), partial(int, base=int_base))
 
+    @staticmethod
+    def find_float(
+        pattern: str | re.Pattern[str],
+        flags: re.RegexFlag = re.RegexFlag(0),
+    ) -> ParserFn:
+        """Makes a parser function that converts the match of :meth:`~find` to float.
+
+        This function is compatible only with a pattern containing one capturing group.
+
+        Args:
+            pattern: The regular expression pattern.
+            flags: The regular expression flags. Ignored if the given pattern is already compiled.
+
+        Raises:
+            InternalError: If the pattern does not have exactly one capturing group.
+
+        Returns:
+            ParserFn: A dictionary for the `dataclasses.field` metadata argument containing the
+                :meth:`~find` parser function wrapped by the float built-in.
+        """
+        if isinstance(pattern, str):
+            pattern = re.compile(pattern, flags)
+
+        if pattern.groups != 1:
+            raise InternalError("only one capturing group is allowed with this parser function")
+
+        return TextParser.wrap(TextParser.find(pattern), partial(float))
+
     """============ END PARSER FUNCTIONS ============"""
 
     @classmethod
-- 
2.50.1