FYI, this is one of the main things I dislike in Rust's syntax because of the typing overhead and the fact that pretty much any tokens are valid in #[here]. Using @Foo(param=foo) (or #[Foo(param=foo)] if you like typing braces) and supporting exactly this style of calling a macro would reduce complexity quite a bit.

FYI, this is one of the main things I dislike in Rust's syntax because of the typing overhead and the fact that pretty much any tokens are valid in #[here]. Using @Foo(param=foo) (or #[Foo(param=foo)] if you like typing braces) and supporting exactly this style of calling a macro would reduce complexity quite a bit.

I appreciate the point of view. But this is another instance when I want to maintain feature parity with Rust to make it possible to more easily transfer ideas. A note is that attributes are pretty much macro calls with different call syntax (and are associated with the AST they are tacked on to). You can see this in syn, with the Macro (macro call) and Attribute. They both take a Path and a raw TokenStream.

syn also provides a convenience function to parse its content as meta items. Something like this can be done to unobtrusively enforce more opinion. Or something like darling can be ported to Rune.