问题
I just found How do I see the expanded macro code that's causing my compile error?. Is it possible to get the expansion of a single macro instead of the whole file?
回答1:
The cargo-expand command is really just a thin wrapper around cargo rustc -- -Zunstable-options --pretty=expanded, which is itself a blunt instrument. You can't target a specific macro.
However, since version 0.4, you can reduce some noise by specifying an extra path argument to expand only macros used by that module:
$ cargo expand path::to::module
回答2:
"Show expanded macro" and "Show recursively expanded macro" commands were recently added to IntelliJ Rust.
A gif demo from CLion blog post:
来源：https://stackoverflow.com/questions/51917354/is-it-possible-to-get-the-expansion-of-a-single-macro-instead-of-the-whole-file