openharmony/third_party_rust_quote
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Generate more concise code for empty quote

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This commit is contained in:
David Tolnay
2020-06-07 10:53:57 -07:00
parent c1a8189b38
commit fa8ee06ee5
1 changed files with 7 additions and 0 deletions
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src/lib.rs
+7
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@@ -472,6 +472,9 @@ pub mod spanned;
/// ```
#[macro_export]
macro_rules! quote {
() => {
$crate::__private::TokenStream::new()
};
($($tt:tt)*) => {{
let mut _s = $crate::__private::TokenStream::new();
$crate::quote_each_token!(_s $($tt)*);
@@ -577,6 +580,10 @@ macro_rules! quote {
/// placed appropriately by the compiler.
#[macro_export]
macro_rules! quote_spanned {
($span:expr=>) => {{
let _: $crate::__private::Span = $span;
$crate::__private::TokenStream::new()
}};
($span:expr=> $($tt:tt)*) => {{
let mut _s = $crate::__private::TokenStream::new();
let _span: $crate::__private::Span = $span;