Move to upstream macro_rules! model
#6893
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Let's merge this before it rotted :) bors r+ |
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This changes
macro_rules!from being treated as a macro invocation to being a first-class item. It also disallows using an additional ident argument for regular macros, som! ident(...);now fails to parse.This matches upstream Rust, and makes the code somewhat simpler by removing repeated "is this a
macro_rules!call" checks. It will also simplify allowing visibilities on macros, which is currently being proposed in rust-lang/rust#78166.