Feature Request: Matching repetitions of placeholders using SSR

I'm trying to match all functions, which:

• start with "op_"
• are public
• arbitrary arguments
• have an arbitrary return type (not equal to unit ())

I'm using the command line tool, and started witht he following query:

rust-analyzer search 'fn $a( $b:$c ) -> $d { $e }'

The problem is that the search really expects only one instance of $e. This means it matches only functions with exactly one statement in the body. Also it only matches functions with exactly one argument.

Is there already a way to achive this pattern maching? I would suspect something like $($e)* to be possible, with matches multiple statements in the body. This would be similar to rust macros.

Start at the rust-analyzer command-line search entry point and reproduce the query shown in the issue against functions with multiple arguments and statements. Trace how placeholders are parsed and matched, then define and test repetition behavior for arbitrary arguments and function-body statements, including exclusion of a unit return type.