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authorF001 <changchun.fan@qq.com>2018-05-05 16:34:43 +0800
committerF001 <changchun.fan@qq.com>2018-05-05 16:38:27 +0800
commit160063aad2206a35e6312bfaa159f0f4475af0ae (patch)
treecfd992dac840404b7921f39670bdc27ef6d82f20 /src/liballoc/string.rs
parent1d168261a1bc0031ef27de735992a4842fd62553 (diff)
downloadrust-160063aad2206a35e6312bfaa159f0f4475af0ae.tar.gz
rust-160063aad2206a35e6312bfaa159f0f4475af0ae.zip
make `String::new()` const
Diffstat (limited to 'src/liballoc/string.rs')
-rw-r--r--src/liballoc/string.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index 2f84d5f7f86..da9afdd2ca3 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -380,7 +380,8 @@ impl String {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn new() -> String {
+    #[rustc_const_unstable(feature = "const_string_new")]
+    pub const fn new() -> String {
         String { vec: Vec::new() }
     }