Upgrade rust/crates/paste to 1.0.5 am: de10f9892e am: a4b1d5f3be am: d4dc85c6ab am: c93282a9e4android-mainline-12.0.0_r99android-mainline-12.0.0_r98android-mainline-12.0.0_r97android-mainline-12.0.0_r96android-mainline-12.0.0_r95android-mainline-12.0.0_r94android-mainline-12.0.0_r93android-mainline-12.0.0_r92android-mainline-12.0.0_r91android-mainline-12.0.0_r90android-mainline-12.0.0_r9android-mainline-12.0.0_r89android-mainline-12.0.0_r88android-mainline-12.0.0_r87android-mainline-12.0.0_r86android-mainline-12.0.0_r85android-mainline-12.0.0_r84android-mainline-12.0.0_r83android-mainline-12.0.0_r82android-mainline-12.0.0_r81android-mainline-12.0.0_r80android-mainline-12.0.0_r8android-mainline-12.0.0_r79android-mainline-12.0.0_r78android-mainline-12.0.0_r77android-mainline-12.0.0_r76android-mainline-12.0.0_r75android-mainline-12.0.0_r74android-mainline-12.0.0_r73android-mainline-12.0.0_r72android-mainline-12.0.0_r71android-mainline-12.0.0_r70android-mainline-12.0.0_r7android-mainline-12.0.0_r69android-mainline-12.0.0_r68android-mainline-12.0.0_r67android-mainline-12.0.0_r66android-mainline-12.0.0_r65android-mainline-12.0.0_r64android-mainline-12.0.0_r63android-mainline-12.0.0_r62android-mainline-12.0.0_r61android-mainline-12.0.0_r60android-mainline-12.0.0_r6android-mainline-12.0.0_r59android-mainline-12.0.0_r58android-mainline-12.0.0_r57android-mainline-12.0.0_r56android-mainline-12.0.0_r53android-mainline-12.0.0_r52android-mainline-12.0.0_r51android-mainline-12.0.0_r50android-mainline-12.0.0_r5android-mainline-12.0.0_r49android-mainline-12.0.0_r48android-mainline-12.0.0_r47android-mainline-12.0.0_r46android-mainline-12.0.0_r45android-mainline-12.0.0_r44android-mainline-12.0.0_r43android-mainline-12.0.0_r42android-mainline-12.0.0_r41android-mainline-12.0.0_r40android-mainline-12.0.0_r39android-mainline-12.0.0_r38android-mainline-12.0.0_r37android-mainline-12.0.0_r35android-mainline-12.0.0_r34android-mainline-12.0.0_r33android-mainline-12.0.0_r32android-mainline-12.0.0_r31android-mainline-12.0.0_r30android-mainline-12.0.0_r3android-mainline-12.0.0_r29android-mainline-12.0.0_r28android-mainline-12.0.0_r27android-mainline-12.0.0_r26android-mainline-12.0.0_r25android-mainline-12.0.0_r24android-mainline-12.0.0_r23android-mainline-12.0.0_r22android-mainline-12.0.0_r21android-mainline-12.0.0_r20android-mainline-12.0.0_r2android-mainline-12.0.0_r19android-mainline-12.0.0_r18android-mainline-12.0.0_r17android-mainline-12.0.0_r16android-mainline-12.0.0_r15android-mainline-12.0.0_r14android-mainline-12.0.0_r13android-mainline-12.0.0_r126android-mainline-12.0.0_r125android-mainline-12.0.0_r124android-mainline-12.0.0_r123android-mainline-12.0.0_r122android-mainline-12.0.0_r121android-mainline-12.0.0_r120android-mainline-12.0.0_r12android-mainline-12.0.0_r119android-mainline-12.0.0_r118android-mainline-12.0.0_r117android-mainline-12.0.0_r116android-mainline-12.0.0_r115android-mainline-12.0.0_r114android-mainline-12.0.0_r113android-mainline-12.0.0_r110android-mainline-12.0.0_r11android-mainline-12.0.0_r109android-mainline-12.0.0_r108android-mainline-12.0.0_r107android-mainline-12.0.0_r106android-mainline-12.0.0_r105android-mainline-12.0.0_r104android-mainline-12.0.0_r103android-mainline-12.0.0_r102android-mainline-12.0.0_r101android-mainline-12.0.0_r100android-mainline-12.0.0_r10android-mainline-12.0.0_r1aml_wif_311811030aml_tz3_311312010aml_tet_311811050aml_sdk_311710000aml_pco_311011000aml_mpr_311911090aml_doc_310851020android12-mainline-wifi-releaseandroid12-mainline-tethering-releaseandroid12-mainline-statsd-releaseandroid12-mainline-sdkext-releaseandroid12-mainline-resolv-releaseandroid12-mainline-permission-releaseandroid12-mainline-neuralnetworks-releaseandroid12-mainline-networkstack-releaseandroid12-mainline-mediaprovider-releaseandroid12-mainline-media-swcodec-releaseandroid12-mainline-media-releaseandroid12-mainline-ipsec-releaseandroid12-mainline-extservices-releaseandroid12-mainline-documentsui-releaseandroid12-mainline-conscrypt-releaseandroid12-mainline-cellbroadcast-releaseandroid12-mainline-captiveportallogin-releaseandroid12-mainline-art-releaseandroid12-mainline-adbd-release

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/paste/+/1662960

Change-Id: I0ec60af95979272c7837449fb18c9e8e227e6a8d

1 files changed, 28 insertions, 10 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 794ef3b..d066ca0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -132,11 +132,17 @@
 //!     };
 //! }
 //!
-//! # struct Paste;
+//! pub struct Paste {}
+//!
 //! method_new!(Paste);  // expands to #[doc = "Create a new `Paste` object"]
 //! ```
 
-#![allow(clippy::needless_doctest_main)]
+#![allow(
+    clippy::doc_markdown,
+    clippy::module_name_repetitions,
+    clippy::needless_doctest_main,
+    clippy::too_many_lines
+)]
 
 extern crate proc_macro;
 
@@ -154,7 +160,8 @@ use std::panic;
 #[proc_macro]
 pub fn paste(input: TokenStream) -> TokenStream {
     let mut contains_paste = false;
-    match expand(input, &mut contains_paste) {
+    let flatten_single_interpolation = true;
+    match expand(input, &mut contains_paste, flatten_single_interpolation) {
         Ok(expanded) => expanded,
         Err(err) => err.to_compile_error(),
     }
@@ -172,7 +179,11 @@ pub fn expr(input: TokenStream) -> TokenStream {
     paste(input)
 }
 
-fn expand(input: TokenStream, contains_paste: &mut bool) -> Result<TokenStream> {
+fn expand(
+    input: TokenStream,
+    contains_paste: &mut bool,
+    flatten_single_interpolation: bool,
+) -> Result<TokenStream> {
     let mut expanded = TokenStream::new();
     let mut lookbehind = Lookbehind::Other;
     let mut prev_none_group = None::<Group>;
@@ -203,15 +214,22 @@ fn expand(input: TokenStream, contains_paste: &mut bool) -> Result<TokenStream>
                     let tokens = pasted_to_tokens(pasted, span)?;
                     expanded.extend(tokens);
                     *contains_paste = true;
-                } else if delimiter == Delimiter::None && is_flat_group(&content) {
+                } else if flatten_single_interpolation
+                    && delimiter == Delimiter::None
+                    && is_single_interpolation_group(&content)
+                {
                     expanded.extend(content);
                     *contains_paste = true;
                 } else {
                     let mut group_contains_paste = false;
-                    let mut nested = expand(content, &mut group_contains_paste)?;
-                    if delimiter == Delimiter::Bracket
-                        && (lookbehind == Lookbehind::Pound || lookbehind == Lookbehind::PoundBang)
-                    {
+                    let is_attribute = delimiter == Delimiter::Bracket
+                        && (lookbehind == Lookbehind::Pound || lookbehind == Lookbehind::PoundBang);
+                    let mut nested = expand(
+                        content,
+                        &mut group_contains_paste,
+                        flatten_single_interpolation && !is_attribute,
+                    )?;
+                    if is_attribute {
                         nested = expand_attr(nested, span, &mut group_contains_paste)?
                     }
                     let group = if group_contains_paste {
@@ -262,7 +280,7 @@ enum Lookbehind {
 }
 
 // https://github.com/dtolnay/paste/issues/26
-fn is_flat_group(input: &TokenStream) -> bool {
+fn is_single_interpolation_group(input: &TokenStream) -> bool {
     #[derive(PartialEq)]
     enum State {
         Init,