planning

node_modules/mdast-util-to-markdown/lib/util/pattern-compile.js

@@ -0,0 +1,25 @@
+module.exports = patternCompile
+
+function patternCompile(pattern) {
+  var before
+  var after
+
+  if (!pattern._compiled) {
+    before = pattern.before ? '(?:' + pattern.before + ')' : ''
+    after = pattern.after ? '(?:' + pattern.after + ')' : ''
+
+    if (pattern.atBreak) {
+      before = '[\\r\\n][\\t ]*' + before
+    }
+
+    pattern._compiled = new RegExp(
+      (before ? '(' + before + ')' : '') +
+        (/[|\\{}()[\]^$+*?.-]/.test(pattern.character) ? '\\' : '') +
+        pattern.character +
+        (after || ''),
+      'g'
+    )
+  }
+
+  return pattern._compiled
+}