gh-114667: Support hexadecimal floating point literals #10
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This add hexadecimal floating point literals (IEEE 754-2008 §5.12.3) and
support construction of floats from hexadecimal strings. Note that the
syntax is more permissive: everything that is currently accepted by the
``float.fromhex()``, but with a mandatory base specifier; it also allows
grouping digits with underscores.
Examples:
```pycon
>>> 0x1.1p-1
0.53125
>>> float('0x1.1')
1.0625
>>> 0x1.1
1.0625
>>> 0x1.1_1_1
1.066650390625
```
Added compatibility code to not break access of existing int attributes.
E.g. 0x1.bit_length() will not require parentheses around the
hexadecimal integer literal (like 1.bit_length() for decimal int).
Minor changes: Py_ISDIGIT/ISXDIGIT macros were transformed to functions.
skirpichev
force-pushed
the
hex-floatlit
branch
2 times, most recently
from
057bc45 to
cd9bf16
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This add hexadecimal floating point literals (IEEE 754-2008 §5.12.3) and support construction of floats from hexadecimal strings. Note that the syntax is more permissive: everything that is currently accepted by the
float.fromhex(), but with a mandatory base specifier; it also allows grouping digits with underscores.Examples:
Minor changes:
📚 Documentation preview 📚: https://cpython-previews--10.org.readthedocs.build/