Haskell: Improvements (#2535)

components/prism-haskell.js

@@ -1,19 +1,22 @@
 Prism.languages.haskell = {
 	'comment': {
-		pattern: /(^|[^-!#$%*+=?&@|~.:<>^\\\/])(?:--[^-!#$%*+=?&@|~.:<>^\\\/].*|{-[\s\S]*?-})/m,
+		pattern: /(^|[^-!#$%*+=?&@|~.:<>^\\\/])(?:--(?:(?=.)[^-!#$%*+=?&@|~.:<>^\\\/].*|$)|{-[\s\S]*?-})/m,
 		lookbehind: true
 	},
-	'char': /'(?:[^\\']|\\(?:[abfnrtv\\"'&]|\^[A-Z@[\]^_]|NUL|SOH|STX|ETX|EOT|ENQ|ACK|BEL|BS|HT|LF|VT|FF|CR|SO|SI|DLE|DC1|DC2|DC3|DC4|NAK|SYN|ETB|CAN|EM|SUB|ESC|FS|GS|RS|US|SP|DEL|\d+|o[0-7]+|x[0-9a-fA-F]+))'/,
+	'char': {
+		pattern: /'(?:[^\\']|\\(?:[abfnrtv\\"'&]|\^[A-Z@[\]^_]|NUL|SOH|STX|ETX|EOT|ENQ|ACK|BEL|BS|HT|LF|VT|FF|CR|SO|SI|DLE|DC1|DC2|DC3|DC4|NAK|SYN|ETB|CAN|EM|SUB|ESC|FS|GS|RS|US|SP|DEL|\d+|o[0-7]+|x[0-9a-fA-F]+))'/,
+		alias: 'string'
+	},
 	'string': {
-		pattern: /"(?:[^\\"]|\\(?:[abfnrtv\\"'&]|\^[A-Z@[\]^_]|NUL|SOH|STX|ETX|EOT|ENQ|ACK|BEL|BS|HT|LF|VT|FF|CR|SO|SI|DLE|DC1|DC2|DC3|DC4|NAK|SYN|ETB|CAN|EM|SUB|ESC|FS|GS|RS|US|SP|DEL|\d+|o[0-7]+|x[0-9a-fA-F]+)|\\\s+\\)*"/,
+		pattern: /"(?:[^\\"]|\\(?:\S|\s+\\))*"/,
 		greedy: true
 	},
 	'keyword': /\b(?:case|class|data|deriving|do|else|if|in|infixl|infixr|instance|let|module|newtype|of|primitive|then|type|where)\b/,
-	'import_statement': {
+	'import-statement': {
 		// The imported or hidden names are not included in this import
 		// statement. This is because we want to highlight those exactly like
 		// we do for the names in the program.
-		pattern: /((?:\r?\n|\r|^)\s*)import\s+(?:qualified\s+)?(?:[A-Z][\w']*)(?:\.[A-Z][\w']*)*(?:\s+as\s+(?:[A-Z][_a-zA-Z0-9']*)(?:\.[A-Z][\w']*)*)?(?:\s+hiding\b)?/m,
+		pattern: /(^\s*)import\s+(?:qualified\s+)?(?:[A-Z][\w']*)(?:\.[A-Z][\w']*)*(?:\s+as\s+(?:[A-Z][\w']*)(?:\.[A-Z][\w']*)*)?(?:\s+hiding\b)?/m,
 		lookbehind: true,
 		inside: {
 			'keyword': /\b(?:import|qualified|as|hiding)\b/

tests/languages/haskell/comment_feature.test

@@ -1,14 +1,18 @@
+--
 -- foo
 {- foo
 bar -}
+{--}
 
 ----------------------------------------------------
 
 [
+	["comment", "--"],
 	["comment", "-- foo"],
-	["comment", "{- foo\r\nbar -}"]
+	["comment", "{- foo\r\nbar -}"],
+	["comment", "{--}"]
 ]
 
 ----------------------------------------------------
 
-Checks for single-line and multi-line comments.
+Checks for single-line and multi-line comments.

tests/languages/haskell/import_statement_feature.test

@@ -6,22 +6,22 @@ import Foo.Bar as Foo.Baz hiding
 ----------------------------------------------------
 
 [
-	["import_statement", [
+	["import-statement", [
 		["keyword", "import"],
 		" Foo"
 	]],
-	["import_statement", [
+	["import-statement", [
 		["keyword", "import"],
 		["keyword", "qualified"],
 		" Foobar"
 	]],
-	["import_statement", [
+	["import-statement", [
 		["keyword", "import"],
 		" Foo_42.Bar ",
 		["keyword", "as"],
 		" Foobar"
 	]],
-	["import_statement", [
+	["import-statement", [
 		["keyword", "import"],
 		" Foo.Bar ",
 		["keyword", "as"],
@@ -32,4 +32,4 @@ import Foo.Bar as Foo.Baz hiding
 
 ----------------------------------------------------
 
-Checks for import statement.
+Checks for import statement.