Added PureScript language definition (#2526)

Author: sriharshachilakapati

components.js

@@ -913,6 +913,12 @@
 			"alias": "pbfasm",
 			"owner": "HeX0R101"
 		},
+		"purescript": {
+			"title": "PureScript",
+			"require": "haskell",
+			"alias": "purs",
+			"owner": "sriharshachilakapati"
+		},
 		"python": {
 			"title": "Python",
 			"alias": "py",

components.json

@@ -0,0 +1,19 @@
+Prism.languages.purescript = Prism.languages.extend('haskell', {
+	'keyword': /\b(?:ado|case|class|data|derive|do|else|forall|if|in|infixl|infixr|instance|let|module|newtype|of|primitive|then|type|where)\b/,
+
+	'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: /(^\s*)import\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|as|hiding)\b/
+		}
+	},
+
+	// These are builtin functions only. Constructors are highlighted later as a constant.
+	'builtin': /\b(?:absurd|add|ap|append|apply|between|bind|bottom|clamp|compare|comparing|compose|conj|const|degree|discard|disj|div|eq|flap|flip|gcd|identity|ifM|join|lcm|liftA1|liftM1|map|max|mempty|min|mod|mul|negate|not|notEq|one|otherwise|recip|show|sub|top|unit|unless|unlessM|void|when|whenM|zero)\b/,
+});
+
+Prism.languages.purs = Prism.languages.purescript;

components/prism-purescript.js

@@ -0,0 +1,57 @@
+<h2>Comments</h2>
+<pre><code>-- Single line comment
+{- Multi-line
+comment -}</code></pre>
+
+<h2>Strings and characters</h2>
+<pre><code>'a'
+'\n'
+'\^A'
+'\^]'
+'\NUL'
+'\23'
+'\o75'
+'\xFE'
+"Here is a backslant \\ as well as \137, \
+    \a numeric escape character, and \^X, a control character."</code></pre>
+
+<h2>Numbers</h2>
+<pre><code>42
+123.456
+123.456e-789
+1e+3
+0o74
+0XAF</code></pre>
+
+<h2>Full example</h2>
+<pre><code>module Codewars.Kata.SumFracts (sumFracts) where
+
+import Prelude
+
+import Data.Foldable (foldl)
+import Data.BigInt (BigInt, fromInt, toString)
+import Data.List (List, length)
+import Data.Tuple (Tuple(..))
+import Data.Maybe (Maybe(..))
+import Data.Ord (abs, signum)
+
+reduce :: Tuple BigInt BigInt -&gt; Tuple BigInt BigInt
+reduce (Tuple num den) =
+  let gcd' = gcd num den
+      den' = den / gcd'
+   in Tuple (num / gcd' * (signum den')) (abs den')
+   
+sumFracts :: List (Tuple Int Int) -&gt; Maybe String
+sumFracts fracts =
+  let fracts' = fracts &lt;#&gt; (\(Tuple n d) -&gt; Tuple (fromInt n) (fromInt d)) &gt;&gt;&gt; reduce
+      
+      den = foldl (\acc (Tuple _ d) -&gt; lcm acc d) one fracts'
+      num = foldl (\acc (Tuple n d) -&gt; acc + n * (den / d)) zero fracts'
+      
+      Tuple n d = reduce $ Tuple num den
+      
+   in if length fracts == 0
+        then Nothing
+        else if d == one
+                then Just $ toString n
+                else Just $ (toString n) &gt;&lt; " " &gt;&lt; (toString d)</code></pre>

components/prism-purescript.min.js

@@ -99,6 +99,7 @@
 			"javascript"
 		],
 		"purebasic": "clike",
+		"purescript": "haskell",
 		"qml": "javascript",
 		"qore": "clike",
 		"racket": "scheme",
@@ -197,6 +198,7 @@
 		"pq": "powerquery",
 		"mscript": "powerquery",
 		"pbfasm": "purebasic",
+		"purs": "purescript",
 		"py": "python",
 		"rkt": "racket",
 		"rpy": "renpy",

examples/prism-purescript.html

@@ -150,6 +150,7 @@
 		"protobuf": "Protocol Buffers",
 		"purebasic": "PureBasic",
 		"pbfasm": "PureBasic",
+		"purs": "PureScript",
 		"py": "Python",
 		"q": "Q (kdb+ database)",
 		"qml": "QML",