Rust: Path resolution for crate::{self as foo}

[hvitved]

For example, use std::{self as ztd} introduces ztd as an alias for std.

[Copilot]

Pull Request Overview

Adds support for resolving paths introduced via crate::{self as foo} (e.g., use std::{self as ztd}) by updating tests and extending the QL path‐resolution logic.

• Updated expected outputs in library‐tests to include std::{self as ztd} entries and adjust offsets.
• Added an example import and usage of std::{self as ztd} in main.rs.
• Extended PathResolution.qll to treat Crate nodes as valid targets when resolving self.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
rust/ql/test/library-tests/path-resolution/path-resolution.expected	Adjusted several SourceFile offsets and inserted new lines for the ztd alias.
rust/ql/test/library-tests/path-resolution/main.rs	Added use std::{self as ztd} and example usage; reformatted impl AStruct block.
rust/ql/test/library-tests/path-resolution/CONSISTENCY/PathResolutionConsistency.expected	Shifted line numbers for proc_macro entries to match the updated main.rs.
rust/ql/lib/codeql/rust/internal/PathResolution.qll	Expanded the self‐resolution clause to include Crate instances.

Comments suppressed due to low confidence (2)

rust/ql/test/library-tests/path-resolution/CONSISTENCY/PathResolutionConsistency.expected:6

• Consider adding consistency tests for the new std::{self as ztd} alias to ensure the alias is resolved exactly once, similar to the existing proc_macro entries.

| main.rs:632:7:632:16 | proc_macro | file://:0:0:0:0 | Crate(proc_macro@0.0.0) |

rust/ql/lib/codeql/rust/internal/PathResolution.qll:208

• [nitpick] The new if block for including this instanceof Crate is indented more deeply than the surrounding clauses; aligning its indentation with the other conditions would improve readability and maintain consistency.

    if