#![doc(html_root_url = "https://docs.rs/quote/0.6.7")]
#[cfg(all(
not(all(target_arch = "wasm32", target_os = "unknown")),
feature = "proc-macro"
))]
extern crate proc_macro;
extern crate proc_macro2;
mod ext;
pub use ext::TokenStreamExt;
mod to_tokens;
pub use to_tokens::ToTokens;
#[doc(hidden)]
pub mod __rt {
use ext::TokenStreamExt;
pub use proc_macro2::*;
fn is_ident_start(c: u8) -> bool {
(b'a' <= c && c <= b'z') || (b'A' <= c && c <= b'Z') || c == b'_'
}
fn is_ident_continue(c: u8) -> bool {
(b'a' <= c && c <= b'z')
|| (b'A' <= c && c <= b'Z')
|| c == b'_'
|| (b'0' <= c && c <= b'9')
}
fn is_ident(token: &str) -> bool {
if token.bytes().all(|digit| digit >= b'0' && digit <= b'9') {
return false;
}
let mut bytes = token.bytes();
let first = bytes.next().unwrap();
if !is_ident_start(first) {
return false;
}
for ch in bytes {
if !is_ident_continue(ch) {
return false;
}
}
true
}
pub fn parse(tokens: &mut TokenStream, span: Span, s: &str) {
if is_ident(s) {
tokens.append(Ident::new(s, span));
} else {
let s: TokenStream = s.parse().expect("invalid token stream");
tokens.extend(s.into_iter().map(|mut t| {
t.set_span(span);
t
}));
}
}
macro_rules! push_punct {
($name:ident $char1:tt) => {
pub fn $name(tokens: &mut TokenStream, span: Span) {
let mut punct = Punct::new($char1, Spacing::Alone);
punct.set_span(span);
tokens.append(punct);
}
};
($name:ident $char1:tt $char2:tt) => {
pub fn $name(tokens: &mut TokenStream, span: Span) {
let mut punct = Punct::new($char1, Spacing::Joint);
punct.set_span(span);
tokens.append(punct);
let mut punct = Punct::new($char2, Spacing::Alone);
punct.set_span(span);
tokens.append(punct);
}
};
($name:ident $char1:tt $char2:tt $char3:tt) => {
pub fn $name(tokens: &mut TokenStream, span: Span) {
let mut punct = Punct::new($char1, Spacing::Joint);
punct.set_span(span);
tokens.append(punct);
let mut punct = Punct::new($char2, Spacing::Joint);
punct.set_span(span);
tokens.append(punct);
let mut punct = Punct::new($char3, Spacing::Alone);
punct.set_span(span);
tokens.append(punct);
}
};
}
push_punct!(push_add '+');
push_punct!(push_add_eq '+' '=');
push_punct!(push_and '&');
push_punct!(push_and_and '&' '&');
push_punct!(push_and_eq '&' '=');
push_punct!(push_at '@');
push_punct!(push_bang '!');
push_punct!(push_caret '^');
push_punct!(push_caret_eq '^' '=');
push_punct!(push_colon ':');
push_punct!(push_colon2 ':' ':');
push_punct!(push_comma ',');
push_punct!(push_div '/');
push_punct!(push_div_eq '/' '=');
push_punct!(push_dot '.');
push_punct!(push_dot2 '.' '.');
push_punct!(push_dot3 '.' '.' '.');
push_punct!(push_dot_dot_eq '.' '.' '=');
push_punct!(push_eq '=');
push_punct!(push_eq_eq '=' '=');
push_punct!(push_ge '>' '=');
push_punct!(push_gt '>');
push_punct!(push_le '<' '=');
push_punct!(push_lt '<');
push_punct!(push_mul_eq '*' '=');
push_punct!(push_ne '!' '=');
push_punct!(push_or '|');
push_punct!(push_or_eq '|' '=');
push_punct!(push_or_or '|' '|');
push_punct!(push_pound '#');
push_punct!(push_question '?');
push_punct!(push_rarrow '-' '>');
push_punct!(push_larrow '<' '-');
push_punct!(push_rem '%');
push_punct!(push_rem_eq '%' '=');
push_punct!(push_fat_arrow '=' '>');
push_punct!(push_semi ';');
push_punct!(push_shl '<' '<');
push_punct!(push_shl_eq '<' '<' '=');
push_punct!(push_shr '>' '>');
push_punct!(push_shr_eq '>' '>' '=');
push_punct!(push_star '*');
push_punct!(push_sub '-');
push_punct!(push_sub_eq '-' '=');
}
#[macro_export]
macro_rules! quote {
($($tt:tt)*) => (quote_spanned!($crate::__rt::Span::call_site()=> $($tt)*));
}
#[macro_export]
macro_rules! quote_spanned {
($span:expr=> $($tt:tt)*) => {
{
let mut _s = $crate::__rt::TokenStream::new();
let _span = $span;
quote_each_token!(_s _span $($tt)*);
_s
}
};
}
#[macro_export]
#[doc(hidden)]
macro_rules! pounded_var_names {
($finish:ident ($($found:ident)*) # ( $($inner:tt)* ) $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) # [ $($inner:tt)* ] $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) # { $($inner:tt)* } $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) # $first:ident $($rest:tt)*) => {
pounded_var_names!($finish ($($found)* $first) $($rest)*)
};
($finish:ident ($($found:ident)*) ( $($inner:tt)* ) $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) [ $($inner:tt)* ] $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) { $($inner:tt)* } $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*)
};
($finish:ident ($($found:ident)*) $ignore:tt $($rest:tt)*) => {
pounded_var_names!($finish ($($found)*) $($rest)*)
};
($finish:ident ($($found:ident)*)) => {
$finish!(() $($found)*)
};
}
#[macro_export]
#[doc(hidden)]
macro_rules! nested_tuples_pat {
(()) => {
&()
};
(() $first:ident $($rest:ident)*) => {
nested_tuples_pat!(($first) $($rest)*)
};
(($pat:pat) $first:ident $($rest:ident)*) => {
nested_tuples_pat!((($pat, $first)) $($rest)*)
};
(($done:pat)) => {
$done
};
}
#[macro_export]
#[doc(hidden)]
macro_rules! multi_zip_expr {
(()) => {
&[]
};
(() $single:ident) => {
$single
};
(() $first:ident $($rest:ident)*) => {
multi_zip_expr!(($first.into_iter()) $($rest)*)
};
(($zips:expr) $first:ident $($rest:ident)*) => {
multi_zip_expr!(($zips.zip($first)) $($rest)*)
};
(($done:expr)) => {
$done
};
}
#[macro_export]
#[doc(hidden)]
macro_rules! quote_each_token {
($tokens:ident $span:ident) => {};
($tokens:ident $span:ident # ! $($rest:tt)*) => {
quote_each_token!($tokens $span #);
quote_each_token!($tokens $span !);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident # ( $($inner:tt)* ) * $($rest:tt)*) => {
for pounded_var_names!(nested_tuples_pat () $($inner)*)
in pounded_var_names!(multi_zip_expr () $($inner)*) {
quote_each_token!($tokens $span $($inner)*);
}
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident # ( $($inner:tt)* ) $sep:tt * $($rest:tt)*) => {
for (_i, pounded_var_names!(nested_tuples_pat () $($inner)*))
in pounded_var_names!(multi_zip_expr () $($inner)*).into_iter().enumerate() {
if _i > 0 {
quote_each_token!($tokens $span $sep);
}
quote_each_token!($tokens $span $($inner)*);
}
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident # [ $($inner:tt)* ] $($rest:tt)*) => {
quote_each_token!($tokens $span #);
$tokens.extend({
let mut g = $crate::__rt::Group::new(
$crate::__rt::Delimiter::Bracket,
quote_spanned!($span=> $($inner)*),
);
g.set_span($span);
Some($crate::__rt::TokenTree::from(g))
});
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident # $first:ident $($rest:tt)*) => {
$crate::ToTokens::to_tokens(&$first, &mut $tokens);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ( $($first:tt)* ) $($rest:tt)*) => {
$tokens.extend({
let mut g = $crate::__rt::Group::new(
$crate::__rt::Delimiter::Parenthesis,
quote_spanned!($span=> $($first)*),
);
g.set_span($span);
Some($crate::__rt::TokenTree::from(g))
});
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident [ $($first:tt)* ] $($rest:tt)*) => {
$tokens.extend({
let mut g = $crate::__rt::Group::new(
$crate::__rt::Delimiter::Bracket,
quote_spanned!($span=> $($first)*),
);
g.set_span($span);
Some($crate::__rt::TokenTree::from(g))
});
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident { $($first:tt)* } $($rest:tt)*) => {
$tokens.extend({
let mut g = $crate::__rt::Group::new(
$crate::__rt::Delimiter::Brace,
quote_spanned!($span=> $($first)*),
);
g.set_span($span);
Some($crate::__rt::TokenTree::from(g))
});
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident + $($rest:tt)*) => {
$crate::__rt::push_add(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident += $($rest:tt)*) => {
$crate::__rt::push_add_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident & $($rest:tt)*) => {
$crate::__rt::push_and(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident && $($rest:tt)*) => {
$crate::__rt::push_and_and(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident &= $($rest:tt)*) => {
$crate::__rt::push_and_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident @ $($rest:tt)*) => {
$crate::__rt::push_at(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ! $($rest:tt)*) => {
$crate::__rt::push_bang(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ^ $($rest:tt)*) => {
$crate::__rt::push_caret(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ^= $($rest:tt)*) => {
$crate::__rt::push_caret_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident : $($rest:tt)*) => {
$crate::__rt::push_colon(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident :: $($rest:tt)*) => {
$crate::__rt::push_colon2(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident , $($rest:tt)*) => {
$crate::__rt::push_comma(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident / $($rest:tt)*) => {
$crate::__rt::push_div(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident /= $($rest:tt)*) => {
$crate::__rt::push_div_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident . $($rest:tt)*) => {
$crate::__rt::push_dot(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident .. $($rest:tt)*) => {
$crate::__rt::push_dot2(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ... $($rest:tt)*) => {
$crate::__rt::push_dot3(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ..= $($rest:tt)*) => {
$crate::__rt::push_dot_dot_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident = $($rest:tt)*) => {
$crate::__rt::push_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident == $($rest:tt)*) => {
$crate::__rt::push_eq_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident >= $($rest:tt)*) => {
$crate::__rt::push_ge(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident > $($rest:tt)*) => {
$crate::__rt::push_gt(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident <= $($rest:tt)*) => {
$crate::__rt::push_le(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident < $($rest:tt)*) => {
$crate::__rt::push_lt(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident *= $($rest:tt)*) => {
$crate::__rt::push_mul_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident != $($rest:tt)*) => {
$crate::__rt::push_ne(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident | $($rest:tt)*) => {
$crate::__rt::push_or(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident |= $($rest:tt)*) => {
$crate::__rt::push_or_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident || $($rest:tt)*) => {
$crate::__rt::push_or_or(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident # $($rest:tt)*) => {
$crate::__rt::push_pound(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ? $($rest:tt)*) => {
$crate::__rt::push_question(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident -> $($rest:tt)*) => {
$crate::__rt::push_rarrow(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident <- $($rest:tt)*) => {
$crate::__rt::push_larrow(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident % $($rest:tt)*) => {
$crate::__rt::push_rem(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident %= $($rest:tt)*) => {
$crate::__rt::push_rem_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident => $($rest:tt)*) => {
$crate::__rt::push_fat_arrow(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident ; $($rest:tt)*) => {
$crate::__rt::push_semi(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident << $($rest:tt)*) => {
$crate::__rt::push_shl(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident <<= $($rest:tt)*) => {
$crate::__rt::push_shl_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident >> $($rest:tt)*) => {
$crate::__rt::push_shr(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident >>= $($rest:tt)*) => {
$crate::__rt::push_shr_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident * $($rest:tt)*) => {
$crate::__rt::push_star(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident - $($rest:tt)*) => {
$crate::__rt::push_sub(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident -= $($rest:tt)*) => {
$crate::__rt::push_sub_eq(&mut $tokens, $span);
quote_each_token!($tokens $span $($rest)*);
};
($tokens:ident $span:ident $first:tt $($rest:tt)*) => {
$crate::__rt::parse(&mut $tokens, $span, stringify!($first));
quote_each_token!($tokens $span $($rest)*);
};
}