Use `ThinVec` in `ast::Path`.

[rust.git] / compiler / rustc_expand / src / placeholders.rs

diff --git a/compiler/rustc_expand/src/placeholders.rs b/compiler/rustc_expand/src/placeholders.rs
index faaf3b3fea58916ae2740546351fcfbc1cb0301a..97b1871028ec043075f2f6a7f5cdc1bafc411c8a 100644 (file)
--- a/compiler/rustc_expand/src/placeholders.rs
+++ b/compiler/rustc_expand/src/placeholders.rs
@@ -1,14 +1,12 @@
 use crate::expand::{AstFragment, AstFragmentKind};
-
 use rustc_ast as ast;
 use rustc_ast::mut_visit::*;
 use rustc_ast::ptr::P;
+use rustc_data_structures::fx::FxHashMap;
 use rustc_span::source_map::DUMMY_SP;
 use rustc_span::symbol::Ident;
-
 use smallvec::{smallvec, SmallVec};
-
-use rustc_data_structures::fx::FxHashMap;
+use thin_vec::ThinVec;
 
 pub fn placeholder(
     kind: AstFragmentKind,
@@ -17,7 +15,7 @@ pub fn placeholder(
 ) -> AstFragment {
     fn mac_placeholder() -> P<ast::MacCall> {
         P(ast::MacCall {
-            path: ast::Path { span: DUMMY_SP, segments: Vec::new(), tokens: None },
+            path: ast::Path { span: DUMMY_SP, segments: ThinVec::new(), tokens: None },
             args: P(ast::MacArgs::Empty),
             prior_type_ascription: None,
         })