Creates an object implementing `Format` that calls the passed closure to perform the formatting. # Examples ``` use ruff_formatter::prelude::*; use

Return true if this type is a subtype of type `target`. See [`TypeRelation::Subtyping`] for more details.

Returns `true` if the inner place is undefined (i.e. there is no such member).

Lexes in-line `noqa` comment, e.g. `# noqa: F401`

Return the built diagnostic.

Return a constraint set indicating the conditions under which `self.relation` holds between `source` and `target`.

Enable or disable pull diagnostics capability

Returns `true` if the file exists.

Get the cached results for a single file at relative `path`. This uses `key` to determine if the results are still accurate. (i.e. if the file hasn't

PT013

When set, the module name for each symbol is included in the snapshot (if available).

Extends `self` with `path`. If `path` is absolute, it replaces the current path. On Windows: if `path` has a root but no prefix (e.g., `\windows`),

Look up a [`KnownClass`] in its canonical module and return a [`Type`] representing that class literal. If the class cannot be found, a debug-level l

Trims the indent of `rhs` by `self`. Returns `None` if `self` is not a prefix of `rhs` or either `self` or `rhs` use mixed indentation.

Send a `textDocument/diagnostic` request for the document at the given path.

Create a [`NamedTupleSpec`] with the given fields.

Lexes file-level exemption comment, e.g. `# ruff: noqa: F401`

Typed internally-visible signature for this function. This represents the annotations on the function itself, unmodified by decorators and overloads.

Returns the static class definition if this is one.

Returns the definition where this `TypedDict` is created, if it was assigned to a variable.

A convenience function for returning a builder for a diagnostic with "error" severity and canned values for its identifier and message.

Adds a typevar to this support.

Return true if this type is [equivalent to] type `other`. Two equivalent types represent the same sets of values. > Two gradual types `A` and `B` ar

Iterates over the entries in the directory in name order.

Set a custom message for the concise formatting of this diagnostic. This overrides the default behavior of generating a concise message from the head

The [`Indexer`] for the current file, which contains the offsets of all comments and more.

Returns an iterator over all non-variadic parameters included in this [`Parameters`] node. The variadic parameters (`.vararg` and `.kwarg`) can never

The module for which the types are inferred.

Adds an argument to the command.

Iterate over the [method resolution order] ("MRO") of the class. If the MRO could not be accurately resolved, this method falls back to iterating ove

Parses a single Python expression. This convenience function can be used to parse a single expression without having to specify the Mode or the locat

Resolves the [`ast::ExprName`] to the [`BindingId`] of the symbol it refers to, if any.

Run [`check_path`] on a snippet of Python code.

Infer the type of a (possibly deferred) sub-expression of a [`Definition`]. Supports expressions that are evaluated within a type-params sub-scope.

Resolves the [`ast::ExprName`] to the [`BindingId`] of the symbol it refers to, if it's the only binding to that name in its scope.

If `expr` is a reference to a builtins symbol, return the name of that symbol. Else, return `None`. This method returns `true` both for "builtin bind

Returns the token stream for `path` serialized as a string.

Build the test server

Clears state such that this group is indistinguishable from an empty group.

Redact result_id values since they are hash-based and non-deterministic