add return type hints

llohse · llohse · commit a8083e33f367 · 2026-02-07T15:05:27.000+01:00
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -785,19 +785,19 @@ def _get_glyph(self, fontname: str, font_class: str,
         # from here on: use the Math font
         new_fontname = 'mathfont'
 
-        def _is_digit(codepoint: CharacterCodeType):
+        def _is_digit(codepoint: CharacterCodeType) -> bool:
             return 0x30 <= codepoint <= 0x39
 
-        def _is_latin_uppercase(codepoint: CharacterCodeType):
+        def _is_latin_uppercase(codepoint: CharacterCodeType) -> bool:
             return 0x41 <= codepoint <= 0x5a
 
-        def _is_latin_lowercase(codepoint: CharacterCodeType):
+        def _is_latin_lowercase(codepoint: CharacterCodeType) -> bool:
             return 0x61 <= codepoint <= 0x7a
 
-        def _is_greek_uppercase(codepoint: CharacterCodeType):
+        def _is_greek_uppercase(codepoint: CharacterCodeType) -> bool:
             return codepoint in greek_uppercase_domain
 
-        def _is_greek_lowercase(codepoint: CharacterCodeType):
+        def _is_greek_lowercase(codepoint: CharacterCodeType) -> bool:
             return codepoint in greek_lowercase_domain
 
         # check if character is digit, latin letter, or greek letter
