Update quote requirement from 0.6 to 1.0

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Updates the requirements on quote to permit the latest version.

Release notes

Sourced from quote's releases.

1.0.0

This release fixes some longstanding limitations of the quote! macro, bringing quote better in line with the patterns that macro authors are used to from working with macro_rules.

Duplicate interpolations in a repetition

In past versions of quote, interpolating the same variable multiple times inside of one repeating block was not allowed.

For example if we had an iterator of local variable names and wanted the generated code to do a clone of each one, that wouldn't compile:

error[E0416]: identifier `var` is bound more than once in the same pattern
 --> src/main.rs:7:27
  |
7 |         #( let #var = #var.clone(); )*
  |                        ^^^ used in a pattern more than once

Macros usually worked around this by having the same sequence of interpolated values named two different things:

// old workaround 1
let var = input.fields.iter().map(|field| &field.ident);
let var2 = var.clone();

quote! {
    #( let #var = #var2.clone(); )*
}

or by giving up on repetitions and doing more of the work within the iterator chain:

// old workaround 2
let var_clones = input
    .fields
    .iter()
    .map(|field| {
        let var = &field.ident;
        quote! {
            let #var = #var.clone();
        }
    });

quote! {
    #(#var_clones)*
}

... (truncated)

Commits

• 97d4571 Release 1.0.0
• ab7241b Release 1.0.0-rc3
• 1d757d4 Can assume Span::join exists
• 640899a Update to proc-macro2 rc2
• 35c085d Space apart rustdoc sections
• dbe67ef Document tuple indexing
• 353ecdc Merge pull request #125 from dtolnay/doc
• 96ec7e7 Document interpolating in doc comments
• 5dd3812 Remove outdated doc about def_site
• 5218552 Em dashes
• Additional commits viewable in compare view

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---

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