2023-04-08 05:25:23 -07:00
|
|
|
// SPDX-License-Identifier: Apache-2.0 OR MIT
|
|
|
|
|
|
|
|
use proc_macro::{TokenStream, TokenTree};
|
|
|
|
|
|
|
|
pub(crate) trait ToTokens {
|
|
|
|
fn to_tokens(&self, tokens: &mut TokenStream);
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<T: ToTokens> ToTokens for Option<T> {
|
|
|
|
fn to_tokens(&self, tokens: &mut TokenStream) {
|
|
|
|
if let Some(v) = self {
|
|
|
|
v.to_tokens(tokens);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ToTokens for proc_macro::Group {
|
|
|
|
fn to_tokens(&self, tokens: &mut TokenStream) {
|
|
|
|
tokens.extend([TokenTree::from(self.clone())]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ToTokens for TokenTree {
|
|
|
|
fn to_tokens(&self, tokens: &mut TokenStream) {
|
|
|
|
tokens.extend([self.clone()]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ToTokens for TokenStream {
|
|
|
|
fn to_tokens(&self, tokens: &mut TokenStream) {
|
|
|
|
tokens.extend(self.clone());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Converts tokens into [`proc_macro::TokenStream`] and performs variable interpolations with
|
|
|
|
/// the given span.
|
|
|
|
///
|
|
|
|
/// This is a similar to the
|
|
|
|
/// [`quote_spanned!`](https://docs.rs/quote/latest/quote/macro.quote_spanned.html) macro from the
|
|
|
|
/// `quote` crate but provides only just enough functionality needed by the current `macros` crate.
|
|
|
|
macro_rules! quote_spanned {
|
2023-04-24 01:11:33 -07:00
|
|
|
($span:expr => $($tt:tt)*) => {{
|
|
|
|
let mut tokens;
|
|
|
|
#[allow(clippy::vec_init_then_push)]
|
|
|
|
{
|
|
|
|
tokens = ::std::vec::Vec::new();
|
|
|
|
let span = $span;
|
|
|
|
quote_spanned!(@proc tokens span $($tt)*);
|
|
|
|
}
|
2023-04-08 05:25:23 -07:00
|
|
|
::proc_macro::TokenStream::from_iter(tokens)
|
|
|
|
}};
|
|
|
|
(@proc $v:ident $span:ident) => {};
|
|
|
|
(@proc $v:ident $span:ident #$id:ident $($tt:tt)*) => {
|
|
|
|
let mut ts = ::proc_macro::TokenStream::new();
|
|
|
|
$crate::quote::ToTokens::to_tokens(&$id, &mut ts);
|
|
|
|
$v.extend(ts);
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident #(#$id:ident)* $($tt:tt)*) => {
|
|
|
|
for token in $id {
|
|
|
|
let mut ts = ::proc_macro::TokenStream::new();
|
|
|
|
$crate::quote::ToTokens::to_tokens(&token, &mut ts);
|
|
|
|
$v.extend(ts);
|
|
|
|
}
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident ( $($inner:tt)* ) $($tt:tt)*) => {
|
|
|
|
let mut tokens = ::std::vec::Vec::new();
|
|
|
|
quote_spanned!(@proc tokens $span $($inner)*);
|
|
|
|
$v.push(::proc_macro::TokenTree::Group(::proc_macro::Group::new(
|
|
|
|
::proc_macro::Delimiter::Parenthesis,
|
|
|
|
::proc_macro::TokenStream::from_iter(tokens)
|
|
|
|
)));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident [ $($inner:tt)* ] $($tt:tt)*) => {
|
|
|
|
let mut tokens = ::std::vec::Vec::new();
|
|
|
|
quote_spanned!(@proc tokens $span $($inner)*);
|
|
|
|
$v.push(::proc_macro::TokenTree::Group(::proc_macro::Group::new(
|
|
|
|
::proc_macro::Delimiter::Bracket,
|
|
|
|
::proc_macro::TokenStream::from_iter(tokens)
|
|
|
|
)));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident { $($inner:tt)* } $($tt:tt)*) => {
|
|
|
|
let mut tokens = ::std::vec::Vec::new();
|
|
|
|
quote_spanned!(@proc tokens $span $($inner)*);
|
|
|
|
$v.push(::proc_macro::TokenTree::Group(::proc_macro::Group::new(
|
|
|
|
::proc_macro::Delimiter::Brace,
|
|
|
|
::proc_macro::TokenStream::from_iter(tokens)
|
|
|
|
)));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident :: $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new(':', ::proc_macro::Spacing::Joint)
|
|
|
|
));
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new(':', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident : $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new(':', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident , $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new(',', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident @ $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new('@', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident ! $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new('!', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
2023-08-14 01:46:41 -07:00
|
|
|
(@proc $v:ident $span:ident ; $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new(';', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
(@proc $v:ident $span:ident + $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Punct(
|
|
|
|
::proc_macro::Punct::new('+', ::proc_macro::Spacing::Alone)
|
|
|
|
));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
2023-04-08 05:25:23 -07:00
|
|
|
(@proc $v:ident $span:ident $id:ident $($tt:tt)*) => {
|
|
|
|
$v.push(::proc_macro::TokenTree::Ident(::proc_macro::Ident::new(stringify!($id), $span)));
|
|
|
|
quote_spanned!(@proc $v $span $($tt)*);
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Converts tokens into [`proc_macro::TokenStream`] and performs variable interpolations with
|
|
|
|
/// mixed site span ([`Span::mixed_site()`]).
|
|
|
|
///
|
|
|
|
/// This is a similar to the [`quote!`](https://docs.rs/quote/latest/quote/macro.quote.html) macro
|
|
|
|
/// from the `quote` crate but provides only just enough functionality needed by the current
|
|
|
|
/// `macros` crate.
|
|
|
|
///
|
|
|
|
/// [`Span::mixed_site()`]: https://doc.rust-lang.org/proc_macro/struct.Span.html#method.mixed_site
|
|
|
|
macro_rules! quote {
|
|
|
|
($($tt:tt)*) => {
|
|
|
|
quote_spanned!(::proc_macro::Span::mixed_site() => $($tt)*)
|
|
|
|
}
|
|
|
|
}
|