libsyntax: De-vec type lists in expressions
libsyntax: De-vec arms and fields in expressions
libsyntax: De-vec token trees
libsyntax: De-vec matchers
libsyntax: De-vec binary literals in the AST and constant evaluator
libsyntax: De-vec tuple types in the AST
libsyntax: De-vec inline assembly in the AST
libsyntax: De-vec the function declaration in the AST
libsyntax: De-vec item and view item lists
libsyntax: De-vec view path lists
libsyntax: De-vec "use" view items in the AST
libsyntax: De-vec struct field definitions in the AST