{"action":"created","comment":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/comments/33051690","id":33051690,"diff_hunk":"@@ -0,0 +1,25 @@\n+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT\n+// file at the top-level directory of this distribution and at\n+// http://rust-lang.org/COPYRIGHT.\n+//\n+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or\n+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license\n+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your\n+// option. This file may not be copied, modified, or distributed\n+// except according to those terms.\n+\n+#![allow(unused_variables)]\n+#![feature(non_ascii_idents)]\n+\n+pub fn main() {\n+    let σ⁰ = 2;\n+    let σ¹ = 2;\n+    let σ² = 1;\n+    let σ³ = 2;\n+    let σ⁴ = 2;\n+    let σ⁵ = 2;\n+    let σ⁶ = 2;\n+    let σ⁷ = 2;\n+    let σ⁸ = 2;\n+    let σ⁹ = 2;","path":"src/test/run-pass/unicode-superscripts.rs","position":24,"original_position":24,"commit_id":"72f04e89d54b14dfe874016d92013df95d20b46c","original_commit_id":"72f04e89d54b14dfe874016d92013df95d20b46c","user":{"login":"killercup","id":20063,"avatar_url":"https://avatars.githubusercontent.com/u/20063?v=3","gravatar_id":"","url":"https://api.github.com/users/killercup","html_url":"https://github.com/killercup","followers_url":"https://api.github.com/users/killercup/followers","following_url":"https://api.github.com/users/killercup/following{/other_user}","gists_url":"https://api.github.com/users/killercup/gists{/gist_id}","starred_url":"https://api.github.com/users/killercup/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/killercup/subscriptions","organizations_url":"https://api.github.com/users/killercup/orgs","repos_url":"https://api.github.com/users/killercup/repos","events_url":"https://api.github.com/users/killercup/events{/privacy}","received_events_url":"https://api.github.com/users/killercup/received_events","type":"User","site_admin":false},"body":"Maybe also test `let σ⁴² = 2;`","created_at":"2015-06-23T15:09:20Z","updated_at":"2015-06-23T15:09:20Z","html_url":"https://github.com/rust-lang/rust/pull/26522#discussion_r33051690","pull_request_url":"https://api.github.com/repos/rust-lang/rust/pulls/26522","_links":{"self":{"href":"https://api.github.com/repos/rust-lang/rust/pulls/comments/33051690"},"html":{"href":"https://github.com/rust-lang/rust/pull/26522#discussion_r33051690"},"pull_request":{"href":"https://api.github.com/repos/rust-lang/rust/pulls/26522"}}},"pull_request":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/26522","id":38332251,"html_url":"https://github.com/rust-lang/rust/pull/26522","diff_url":"https://github.com/rust-lang/rust/pull/26522.diff","patch_url":"https://github.com/rust-lang/rust/pull/26522.patch","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/26522","number":26522,"state":"open","locked":false,"title":"Support unicode superscripts","user":{"login":"yongqli","id":67243,"avatar_url":"https://avatars.githubusercontent.com/u/67243?v=3","gravatar_id":"","url":"https://api.github.com/users/yongqli","html_url":"https://github.com/yongqli","followers_url":"https://api.github.com/users/yongqli/followers","following_url":"https://api.github.com/users/yongqli/following{/other_user}","gists_url":"https://api.github.com/users/yongqli/gists{/gist_id}","starred_url":"https://api.github.com/users/yongqli/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yongqli/subscriptions","organizations_url":"https://api.github.com/users/yongqli/orgs","repos_url":"https://api.github.com/users/yongqli/repos","events_url":"https://api.github.com/users/yongqli/events{/privacy}","received_events_url":"https://api.github.com/users/yongqli/received_events","type":"User","site_admin":false},"body":"Currently Rust allows unicode subscripts to continue identifiers; I've added support for superscripts as well.\r\n\r\nSee below for discussions:\r\nhttps://github.com/rust-lang/rust/issues/4928\r\nhttps://users.rust-lang.org/t/allow-unicode-superscripts-in-identifiers/1892\r\n\r\nr? @nikomatsakis  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