`range_set!` doesn't allow `::`s

[geophree]

The following fails with no rules expected this token in macro call pointing to the :: as the problem:

let rs = range_set![0..=u32::MAX]; // won't compile

[spearman]

Thanks for reporting this. It looks like complex expressions need to be surrounded by parentheses so:

let rs = range_set![0..=(u32::MAX)]; 

should compile.

@Phlosioneer added the range_set! macro. I'm not sure if it's possible to rewrite to avoid this restriction. This crate is not in use by me currently so I'm not planning on attempting this in the near future.

[Phlosioneer]

Thanks for pinging me on this. The macro can't capture the full complexity of normally allowed range syntax, due to parser ambiguity. However, :: based constants are a reasonable expectation, that should be handled. Member accesses (via .) are also a reasonable expectation.

The macro should be able to be fixed to allow any number of :: or .. I'll try to fix that when I have the time available. In the meantime, () should work.

Note to future self: also list explicitly in the documentation what kinds of inputs require (), for example :: paths with generic parameters.

[spearman]

It also doesn't seem to accept parentheses in this position:

error: no rules expected `(`
  --> examples/example.rs:10:25
   |
10 |   let s = range_set!(foo());
   |                         ^ no rules expected this token in macro call
   |
   = note: while trying to match `,`