fix highlighting of YAMLs anchor & alias

components/prism-yaml.js

@@ -1,6 +1,6 @@
 Prism.languages.yaml = {
 	'scalar': {
-		pattern: /([\-:]\s*(?:![^\s]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\2[^\r\n]+)*)/,
+		pattern: /([\-:]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\2[^\r\n]+)*)/,
 		lookbehind: true,
 		alias: 'string'
 	},
@@ -16,32 +16,32 @@ Prism.languages.yaml = {
 		alias: 'important'
 	},
 	'datetime': {
-		pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:\d{4}-\d\d?-\d\d?(?:[tT]|[ \t]+)\d\d?:\d{2}:\d{2}(?:\.\d*)?[ \t]*(?:Z|[-+]\d\d?(?::\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(?::\d{2}(?:\.\d*)?)?)(?=[ \t]*(?:$|,|]|}))/m,
+		pattern: /([:\-,[{]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*)(?:\d{4}-\d\d?-\d\d?(?:[tT]|[ \t]+)\d\d?:\d{2}:\d{2}(?:\.\d*)?[ \t]*(?:Z|[-+]\d\d?(?::\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(?::\d{2}(?:\.\d*)?)?)(?=[ \t]*(?:$|,|]|}))/m,
 		lookbehind: true,
 		alias: 'number'
 	},
 	'boolean': {
-		pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:true|false)[ \t]*(?=$|,|]|})/im,
+		pattern: /([:\-,[{]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*)(?:true|false)[ \t]*(?=$|,|]|})/im,
 		lookbehind: true,
 		alias: 'important'
 	},
 	'null': {
-		pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)(?:null|~)[ \t]*(?=$|,|]|})/im,
+		pattern: /([:\-,[{]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*)(?:null|~)[ \t]*(?=$|,|]|})/im,
 		lookbehind: true,
 		alias: 'important'
 	},
 	'string': {
-		pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)("|')(?:(?!\2)[^\\\r\n]|\\.)*\2(?=[ \t]*(?:$|,|]|}|\s*#))/m,
+		pattern: /([:\-,[{]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*)("|')(?:(?!\2)[^\\\r\n]|\\.)*\2(?=[ \t]*(?:$|,|]|}|\s*#))/m,
 		lookbehind: true,
 		greedy: true
 	},
 	'number': {
-		pattern: /([:\-,[{]\s*(?:![^\s]+)?[ \t]*)[+-]?(?:0x[\da-f]+|0o[0-7]+|(?:\d+\.?\d*|\.?\d+)(?:e[+-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,
+		pattern: /([:\-,[{]\s*(?:![^\s]+)?(?:[&*][^\s\[\]{},]+)?[ \t]*)[+-]?(?:0x[\da-f]+|0o[0-7]+|(?:\d+\.?\d*|\.?\d+)(?:e[+-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,
 		lookbehind: true
 	},
 	'tag': /![^\s]+/,
-	'important': /[&*][\w]+/,
+	'important': /[&*][^\s\[\]{},]+/,
 	'punctuation': /---|[:[\]{}\-,|>?]|\.\.\./
 };
 
-Prism.languages.yml = Prism.languages.yaml;
+Prism.languages.yml = Prism.languages.yaml;

tests/languages/yaml/anchor_and_alias_feature.test

@@ -0,0 +1,59 @@
+x-number: &num-ber 13
+x-string: &stri_ng "good"
+x-null: &nu-ll null
+x-boolean: &boo-lean true
+x-datetime: &date-time 2001-12-15T02:59:43.1Z
+x-scalar: &sca-lar |
+  foo
+  bar
+
+foobar: *num-ber
+fubar: *stri_ng
+
+----------------------------------------------------
+
+[
+	["key", "x-number"],
+	["punctuation", ":"],
+	["important", "&num-ber"],
+  ["number", "13"],
+
+	["key", "x-string"],
+	["punctuation", ":"],
+	["important", "&stri_ng"],
+  ["string", "\"good\""],
+
+  ["key", "x-null"],
+	["punctuation", ":"],
+	["important", "&nu-ll"],
+  ["null", "null"],
+
+  ["key", "x-boolean"],
+	["punctuation", ":"],
+	["important", "&boo-lean"],
+  ["boolean", "true"],
+
+  ["key", "x-datetime"],
+	["punctuation", ":"],
+	["important", "&date-time"],
+  ["datetime", "2001-12-15T02:59:43.1Z"],
+
+  ["key", "x-scalar"],
+	["punctuation", ":"],
+	["important", "&sca-lar"],
+  ["punctuation", "|"],
+  ["scalar", "\n  foo\n  bar"],
+
+  ["key", "foobar"],
+  ["punctuation", ":"],
+  ["important", "*num-ber"],
+
+  ["key", "fubar"],
+  ["punctuation", ":"],
+  ["important", "*stri_ng"]
+]
+
+----------------------------------------------------
+
+Checks for anchors and aliases.
+TODO: null, boolean, datetime, scalar