[mypyc] Implement `str.lower()` and `str.upper()` primitive#19375

Draft

Jahongir-Qurbonov wants to merge 10 commits intopython:masterfrom

Jahongir-Qurbonov:str-lower-upper

Commits on Jul 4, 2025

Commits on Jul 6, 2025

Refactor tolower_ucs4 and toupper_ucs4 functions by removing fallback logic for non-ASCII characters
Jahongir-Qurbonov
committed
Optimize CPyStr_Lower and CPyStr_Upper for ASCII strings by removing fallback logic and using direct table lookups
Jahongir-Qurbonov
committed
Optimize CPyStr_Lower and CPyStr_Upper for ASCII strings by removing static lookup tables and using direct character conversion
Jahongir-Qurbonov
committed
Add test case for lower() method with special case for uppercase 'SS'
Jahongir-Qurbonov
committed
Refactor CPyStr_Lower and CPyStr_Upper to use consistent variable naming for character conversion
Jahongir-Qurbonov
committed
Add test case for lower() method to handle Greek capital sigma
Jahongir-Qurbonov
committed
Add commented-out test cases for lower() and upper() methods to handle special characters
Jahongir-Qurbonov
committed

Commits on Jul 7, 2025

Merge branch 'python:master' into str-lower-upper
Jahongir-Qurbonov
authored

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