Scala: Added support for interpolated strings (#3293)

components/prism-scala.js

@@ -13,5 +13,37 @@ Prism.languages.scala = Prism.languages.extend('java', {
 	'builtin': /\b(?:Any|AnyRef|AnyVal|Boolean|Byte|Char|Double|Float|Int|Long|Nothing|Short|String|Unit)\b/,
 	'symbol': /'[^\d\s\\]\w*/
 });
+
+Prism.languages.insertBefore('scala', 'triple-quoted-string', {
+	'string-interpolation': {
+		pattern: /\b[a-z]\w*(?:"""(?:[^$]|\$(?:[^{]|\{(?:[^{}]|\{[^{}]*\})*\}))*?"""|"(?:[^$"\r\n]|\$(?:[^{]|\{(?:[^{}]|\{[^{}]*\})*\}))*")/i,
+		greedy: true,
+		inside: {
+			'id': {
+				pattern: /^\w+/,
+				greedy: true,
+				alias: 'function'
+			},
+			'escape': {
+				pattern: /\\\$"|\$[$"]/,
+				greedy: true,
+				alias: 'symbol'
+			},
+			'interpolation': {
+				pattern: /\$(?:\w+|\{(?:[^{}]|\{[^{}]*\})*\})/,
+				greedy: true,
+				inside: {
+					'punctuation': /^\$\{?|\}$/,
+					'expression': {
+						pattern: /[\s\S]+/,
+						inside: Prism.languages.scala
+					}
+				}
+			},
+			'string': /[\s\S]+/
+		}
+	}
+});
+
 delete Prism.languages.scala['class-name'];
 delete Prism.languages.scala['function'];

tests/languages/scala/string_feature.test

@@ -6,8 +6,14 @@ bar"""
 """fo"o
 // comment
 bar"""
+"""{"name":"James"}"""
 "foo /* comment */ bar"
-'foo // bar'
+
+s"Hello, $name"
+s"1 + 1 = ${1 + 1}"
+s"New offers starting at $$14.99"
+f"$name%s is $height%2.2f meters tall"
+json"{ name: $name, id: $id }"
 
 ----------------------------------------------------
 
@@ -17,10 +23,68 @@ bar"""
 
 	["triple-quoted-string", "\"\"\"fo\"o\r\nbar\"\"\""],
 	["triple-quoted-string", "\"\"\"fo\"o\r\n// comment\r\nbar\"\"\""],
+	["triple-quoted-string", "\"\"\"{\"name\":\"James\"}\"\"\""],
 	["string", "\"foo /* comment */ bar\""],
-	["string", "'foo // bar'"]
+
+	["string-interpolation", [
+		["id", "s"],
+		["string", "\"Hello, "],
+		["interpolation", [
+			["punctuation", "$"],
+			["expression", ["name"]]
+		]],
+		["string", "\""]
+	]],
+	["string-interpolation", [
+		["id", "s"],
+		["string", "\"1 + 1 = "],
+		["interpolation", [
+			["punctuation", "${"],
+			["expression", [
+				["number", "1"],
+				["operator", "+"],
+				["number", "1"]
+			]],
+			["punctuation", "}"]
+		]],
+		["string", "\""]
+	]],
+	["string-interpolation", [
+		["id", "s"],
+		["string", "\"New offers starting at "],
+		["escape", "$$"],
+		["string", "14.99\""]
+	]],
+	["string-interpolation", [
+		["id", "f"],
+		["string", "\""],
+		["interpolation", [
+			["punctuation", "$"],
+			["expression", ["name"]]
+		]],
+		["string", "%s is "],
+		["interpolation", [
+			["punctuation", "$"],
+			["expression", ["height"]]
+		]],
+		["string", "%2.2f meters tall\""]
+	]],
+	["string-interpolation", [
+		["id", "json"],
+		["string", "\"{ name: "],
+		["interpolation", [
+			["punctuation", "$"],
+			["expression", ["name"]]
+		]],
+		["string", ", id: "],
+		["interpolation", [
+			["punctuation", "$"],
+			["expression", ["id"]]
+		]],
+		["string", " }\""]
+	]]
 ]
 
 ----------------------------------------------------
 
-Checks for characters and strings.
+Checks for strings.