From 736c581d630177b58e9a490229fc05ef46f2959a Mon Sep 17 00:00:00 2001
From: Wei Ting <59229084+hoonweiting@users.noreply.github.com>
Date: Mon, 4 Oct 2021 02:06:01 +0800
Subject: [PATCH] Elm: Recognise unicode escapes as valid Char (#3105)

---
 components/prism-elm.js               |  2 +-
 components/prism-elm.min.js           |  2 +-
 tests/languages/elm/char_feature.test | 10 ++++++++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/components/prism-elm.js b/components/prism-elm.js
index f8e27a640f..5c8a559a81 100644
--- a/components/prism-elm.js
+++ b/components/prism-elm.js
@@ -1,7 +1,7 @@
 Prism.languages.elm = {
 	'comment': /--.*|\{-[\s\S]*?-\}/,
 	'char': {
-		pattern: /'(?:[^\\'\r\n]|\\(?:[abfnrtv\\']|\d+|x[0-9a-fA-F]+))'/,
+		pattern: /'(?:[^\\'\r\n]|\\(?:[abfnrtv\\']|\d+|x[0-9a-fA-F]+|u\{[0-9a-fA-F]+\}))'/,
 		greedy: true
 	},
 	'string': [
diff --git a/components/prism-elm.min.js b/components/prism-elm.min.js
index c706a9438f..681418de59 100644
--- a/components/prism-elm.min.js
+++ b/components/prism-elm.min.js
@@ -1 +1 @@
-Prism.languages.elm={comment:/--.*|\{-[\s\S]*?-\}/,char:{pattern:/'(?:[^\\'\r\n]|\\(?:[abfnrtv\\']|\d+|x[0-9a-fA-F]+))'/,greedy:!0},string:[{pattern:/"""[\s\S]*?"""/,greedy:!0},{pattern:/"(?:[^\\"\r\n]|\\.)*"/,greedy:!0}],"import-statement":{pattern:/(^[\t ]*)import\s+[A-Z]\w*(?:\.[A-Z]\w*)*(?:\s+as\s+(?:[A-Z]\w*)(?:\.[A-Z]\w*)*)?(?:\s+exposing\s+)?/m,lookbehind:!0,inside:{keyword:/\b(?:as|exposing|import)\b/}},keyword:/\b(?:alias|as|case|else|exposing|if|in|infixl|infixr|let|module|of|then|type)\b/,builtin:/\b(?:abs|acos|always|asin|atan|atan2|ceiling|clamp|compare|cos|curry|degrees|e|flip|floor|fromPolar|identity|isInfinite|isNaN|logBase|max|min|negate|never|not|pi|radians|rem|round|sin|sqrt|tan|toFloat|toPolar|toString|truncate|turns|uncurry|xor)\b/,number:/\b(?:\d+(?:\.\d+)?(?:e[+-]?\d+)?|0x[0-9a-f]+)\b/i,operator:/\s\.\s|[+\-/*=.$<>:&|^?%#@~!]{2,}|[+\-/*=$<>:&|^?%#@~!]/,hvariable:/\b(?:[A-Z]\w*\.)*[a-z]\w*\b/,constant:/\b(?:[A-Z]\w*\.)*[A-Z]\w*\b/,punctuation:/[{}[\]|(),.:]/};
\ No newline at end of file
+Prism.languages.elm={comment:/--.*|\{-[\s\S]*?-\}/,char:{pattern:/'(?:[^\\'\r\n]|\\(?:[abfnrtv\\']|\d+|x[0-9a-fA-F]+|u\{[0-9a-fA-F]+\}))'/,greedy:!0},string:[{pattern:/"""[\s\S]*?"""/,greedy:!0},{pattern:/"(?:[^\\"\r\n]|\\.)*"/,greedy:!0}],"import-statement":{pattern:/(^[\t ]*)import\s+[A-Z]\w*(?:\.[A-Z]\w*)*(?:\s+as\s+(?:[A-Z]\w*)(?:\.[A-Z]\w*)*)?(?:\s+exposing\s+)?/m,lookbehind:!0,inside:{keyword:/\b(?:as|exposing|import)\b/}},keyword:/\b(?:alias|as|case|else|exposing|if|in|infixl|infixr|let|module|of|then|type)\b/,builtin:/\b(?:abs|acos|always|asin|atan|atan2|ceiling|clamp|compare|cos|curry|degrees|e|flip|floor|fromPolar|identity|isInfinite|isNaN|logBase|max|min|negate|never|not|pi|radians|rem|round|sin|sqrt|tan|toFloat|toPolar|toString|truncate|turns|uncurry|xor)\b/,number:/\b(?:\d+(?:\.\d+)?(?:e[+-]?\d+)?|0x[0-9a-f]+)\b/i,operator:/\s\.\s|[+\-/*=.$<>:&|^?%#@~!]{2,}|[+\-/*=$<>:&|^?%#@~!]/,hvariable:/\b(?:[A-Z]\w*\.)*[a-z]\w*\b/,constant:/\b(?:[A-Z]\w*\.)*[A-Z]\w*\b/,punctuation:/[{}[\]|(),.:]/};
\ No newline at end of file
diff --git a/tests/languages/elm/char_feature.test b/tests/languages/elm/char_feature.test
index c4d33fcd2a..8fb06d33ce 100644
--- a/tests/languages/elm/char_feature.test
+++ b/tests/languages/elm/char_feature.test
@@ -3,6 +3,9 @@
 '\n'
 '\23'
 '\xFE'
+'\u{0000}'
+'\u{1F648}'
+'\u{10FFFF}'
 
 ----------------------------------------------------
 
@@ -11,9 +14,12 @@
 	["char", "'\\''"],
 	["char", "'\\n'"],
 	["char", "'\\23'"],
-	["char", "'\\xFE'"]
+	["char", "'\\xFE'"],
+	["char", "'\\u{0000}'"],
+	["char", "'\\u{1F648}'"],
+	["char", "'\\u{10FFFF}'"]
 ]
 
 ----------------------------------------------------
 
-Checks for chars.
\ No newline at end of file
+Checks for chars.