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1 files changed, 87 insertions, 0 deletions

diff --git a/node_modules/expand-brackets/lib/compilers.js b/node_modules/expand-brackets/lib/compilers.js
new file mode 100644
index 00000000..fbf7fe81
--- /dev/null
+++ b/node_modules/expand-brackets/lib/compilers.js
@@ -0,0 +1,87 @@
+'use strict';
+
+var posix = require('posix-character-classes');
+
+module.exports = function(brackets) {
+  brackets.compiler
+
+    /**
+     * Escaped characters
+     */
+
+    .set('escape', function(node) {
+      return this.emit('\\' + node.val.replace(/^\\/, ''), node);
+    })
+
+    /**
+     * Text
+     */
+
+    .set('text', function(node) {
+      return this.emit(node.val.replace(/([{}])/g, '\\$1'), node);
+    })
+
+    /**
+     * POSIX character classes
+     */
+
+    .set('posix', function(node) {
+      if (node.val === '[::]') {
+        return this.emit('\\[::\\]', node);
+      }
+
+      var val = posix[node.inner];
+      if (typeof val === 'undefined') {
+        val = '[' + node.inner + ']';
+      }
+      return this.emit(val, node);
+    })
+
+    /**
+     * Non-posix brackets
+     */
+
+    .set('bracket', function(node) {
+      return this.mapVisit(node.nodes);
+    })
+    .set('bracket.open', function(node) {
+      return this.emit(node.val, node);
+    })
+    .set('bracket.inner', function(node) {
+      var inner = node.val;
+
+      if (inner === '[' || inner === ']') {
+        return this.emit('\\' + node.val, node);
+      }
+      if (inner === '^]') {
+        return this.emit('^\\]', node);
+      }
+      if (inner === '^') {
+        return this.emit('^', node);
+      }
+
+      if (/-/.test(inner) && !/(\d-\d|\w-\w)/.test(inner)) {
+        inner = inner.split('-').join('\\-');
+      }
+
+      var isNegated = inner.charAt(0) === '^';
+      // add slashes to negated brackets, per spec
+      if (isNegated && inner.indexOf('/') === -1) {
+        inner += '/';
+      }
+      if (isNegated && inner.indexOf('.') === -1) {
+        inner += '.';
+      }
+
+      // don't unescape `0` (octal literal)
+      inner = inner.replace(/\\([1-9])/g, '$1');
+      return this.emit(inner, node);
+    })
+    .set('bracket.close', function(node) {
+      var val = node.val.replace(/^\\/, '');
+      if (node.parent.escaped === true) {
+        return this.emit('\\' + val, node);
+      }
+      return this.emit(val, node);
+    });
+};