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6ad1facee1
Retarget closures to the swift-syntax AST, output unchanged. swift-syntax nests the whole closure header under an optional `closureSignature`, so a single `closureExpr` rule (with optional attributes, capture list, parameter clause, and return clause) replaces the tree-sitter `lambda_literal` rule. The parameter clause is a union of the parenthesised form (`closureParameterClause`, unwrapped to its `closureParameter` children) and the shorthand form (`closureShorthandParameter`, a bare name); one rule each replaces the four `lambda_parameter` variants. `closureCapture` -> `variable_declaration` (an optional ownership specifier becomes a modifier; an explicit capture initializer becomes the bound value). The trailing-closure call form is already handled by the `functionCallExpr` `trailingClosure` variant, so the tree-sitter trailing-closure call rule is dropped. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>