Name of the lambda argument treated as an implicit inner pipe
Most macros are expanded before the pipe is processed. This is the list of exceptions.
Result of the previous pipeline step
Replacements to perform within pipes, before other transformations.
Wrap first argument of a kwexpr into a StopWalk so that it's not processed in the walk afterwards.
Replace function arg placeholders (like
_) with corresponding symbols from
args. Processes a single level of
Replace symbols in
expr according to