add handling of string interpolation in Prism jcubic#321

Author: jcubic

lib/js/prism.js

@@ -24,6 +24,31 @@ Prism.languages.insertBefore('scheme', 'string', {
        greedy: true
    }
 });
+// modification of PrismJS JavaScript string interpolation
+Prism.languages.insertBefore('scheme', 'string', {
+    'template-string': {
+        pattern: /#"(?:\\[\s\S]|\$\{(?:[^{}]|\{(?:[^{}]|\{[^}]*\})*\})+\}|(?!\$\{)[^\\"])*"/,
+        greedy: true,
+        inside: {
+            'template-punctuation': {
+                pattern: /^#"|"$/,
+                alias: 'string'
+            },
+            'interpolation': {
+                pattern: /((?:^|[^\\])(?:\\{2})*)\$\{(?:[^{}]|\{(?:[^{}]|\{[^}]*\})*\})+\}/,
+                lookbehind: true,
+                inside: {
+                    'interpolation-punctuation': {
+                        pattern: /^\$\{|\}$/,
+                        alias: 'punctuation'
+                    },
+                    rest: Prism.languages.scheme
+                }
+            },
+            'string': /[\s\S]+/
+        }
+    }
+});
 // properties of object literals
 Prism.languages.insertBefore('scheme', 'string', {
     variable: {