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Chris Krycho aba1802828 red-knot: infer multiplication for strings and integers (#13117 )

## Summary

The resulting type when multiplying a string literal by an integer
literal is one of two types:

- `StringLiteral`, in the case where it is a reasonably small resulting
string (arbitrarily bounded here to 4096 bytes, roughly a page on many
operating systems), including the fully expanded string.
- `LiteralString`, matching Pyright etc., for strings larger than that.

Additionally:

- Switch to using `Box<str>` instead of `String` for the internal value
of `StringLiteral`, saving some non-trivial byte overhead (and keeping
the total number of allocations the same).
- Be clearer and more accurate about which types we ought to defer to in
`StringLiteral` and `LiteralString` member lookup.

## Test Plan

Added a test case covering multiplication times integers: positive,
negative, zero, and in and out of bounds.

---------

Co-authored-by: Alex Waygood <alex.waygood@gmail.com>
Co-authored-by: Carl Meyer <carl@astral.sh>

2024-08-27 09:00:36 -07:00

src

red-knot: infer multiplication for strings and integers (#13117 )

2024-08-27 09:00:36 -07:00

vendor/typeshed

Sync vendored typeshed stubs (#12899 )

2024-08-14 18:11:23 -07:00

build.rs

[red-knot] Merge the semantic and module-resolver crates (#12751 )

2024-08-08 15:34:11 +01:00

Cargo.toml

Added bytes type and some inference (#13061 )

2024-08-22 13:27:15 -07:00

README.md

[red-knot] Merge the semantic and module-resolver crates (#12751 )

2024-08-08 15:34:11 +01:00

README.md

Red Knot

Semantic analysis for the red-knot project.

Vendored types for the stdlib

This crate vendors typeshed's stubs for the standard library. The vendored stubs can be found in crates/red_knot_python_semantic/vendor/typeshed. The file crates/red_knot_python_semantic/vendor/typeshed/source_commit.txt tells you the typeshed commit that our vendored stdlib stubs currently correspond to.

The typeshed stubs are updated every two weeks via an automated PR using the sync_typeshed.yaml workflow in the .github/workflows directory. This workflow can also be triggered at any time via workflow dispatch.