Allow no space around an ifexp in certain cases #935
Closed
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
See python/cpython#23317 Raised in #930.
For an expression like `f"{one:{two:}{three}}"`, `three` is not in an f-string spec, and should be tokenized accordingly.
This PR fixes the `format_spec_count` bookkeeping in the tokenizer, so it properly decrements it when a closing `}` is encountered but only if the `}` closes a format_spec.
Reported in #930.
This is an obscure one. `_ if 0else _` failed to parse with some very weird errors. It turns out that the tokenizer tries to parse `0else` as a single number, but when it encounters `l` it realizes it can't be a single number and it backtracks. Unfortunately the backtracking logic was broken, and it failed to correctly backtrack one of the offsets used for whitespace parsing (the byte offset since the start of the line). This caused whitespace nodes to refer to incorrect parts of the input text, eventually resulting in the above behavior. This PR fixes the bookkeeping when the tokenizer backtracks. Reported in #930.
Python accepts code where `lambda` follows a `*`, so this PR relaxes validation rules for Lambdas. Raised in #930.
This was referenced May 28, 2023
Closed
Closed
facebook-github-bot
added
the
CLA Signed
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #935 +/- ##
=======================================
Coverage 90.92% 90.93%
=======================================
Files 254 254
Lines 25937 25947 +10
=======================================
+ Hits 23584 23594 +10
Misses 2353 2353 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
|
This PR relaxes the accepted types for the `elt` field in `ListComp`, `SetComp`, and `GenExp`, as well as the `key` and `value` fields in `DictComp`. Fixes #500.
zsol
changed the title
This was referenced May 28, 2023
zsol
added a commit
that referenced
this pull request
Jun 7, 2023
#936, #935, #934, #933, #932, #931) * Allow walrus in slices See python/cpython#23317 Raised in #930. * Fix parsing of nested f-string specifiers For an expression like `f"{one:{two:}{three}}"`, `three` is not in an f-string spec, and should be tokenized accordingly. This PR fixes the `format_spec_count` bookkeeping in the tokenizer, so it properly decrements it when a closing `}` is encountered but only if the `}` closes a format_spec. Reported in #930. * Fix tokenizing `0else` This is an obscure one. `_ if 0else _` failed to parse with some very weird errors. It turns out that the tokenizer tries to parse `0else` as a single number, but when it encounters `l` it realizes it can't be a single number and it backtracks. Unfortunately the backtracking logic was broken, and it failed to correctly backtrack one of the offsets used for whitespace parsing (the byte offset since the start of the line). This caused whitespace nodes to refer to incorrect parts of the input text, eventually resulting in the above behavior. This PR fixes the bookkeeping when the tokenizer backtracks. Reported in #930. * Allow no whitespace between lambda keyword and params in certain cases Python accepts code where `lambda` follows a `*`, so this PR relaxes validation rules for Lambdas. Raised in #930. * Allow any expression in comprehensions' evaluated expression This PR relaxes the accepted types for the `elt` field in `ListComp`, `SetComp`, and `GenExp`, as well as the `key` and `value` fields in `DictComp`. Fixes #500. * Allow no space around an ifexp in certain cases For example in `_ if _ else""if _ else _`. Raised in #930. Also fixes #854. * Allow no spaces after `as` in a contextmanager in certain cases Like in `with foo()as():pass` Raised in #930. * Allow no spaces around walrus in certain cases Like in `[_:=''for _ in _]` Raised in #930. * Allow no whitespace after lambda body in certain cases Like in `[lambda:()for _ in _]` Reported in #930.
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.
Allow no space around an ifexp in certain cases
For example in
_ if _ else""if _ else _.Raised in #930. Also fixes #854.
Stack created with Sapling. Best reviewed with ReviewStack.
asin a contextmanager in certain cases #9370else#933