add file

node_modules/postcss-values-parser/lib/errors/ParserError.js

@@ -0,0 +1,19 @@
+'use strict';
+
+class ParserError extends Error {
+  constructor(message) {
+    super(message);
+
+    this.name = this.constructor.name;
+    this.message = message || 'An error ocurred while parsing.';
+
+    if (typeof Error.captureStackTrace === 'function') {
+      Error.captureStackTrace(this, this.constructor);
+    }
+    else {
+      this.stack = (new Error(message)).stack;
+    }
+  }
+}
+
+module.exports = ParserError;

node_modules/postcss-values-parser/lib/errors/TokenizeError.js

@@ -0,0 +1,19 @@
+'use strict';
+
+class TokenizeError extends Error {
+  constructor(message) {
+    super(message);
+
+    this.name = this.constructor.name;
+    this.message = message || 'An error ocurred while tokzenizing.';
+
+    if (typeof Error.captureStackTrace === 'function') {
+      Error.captureStackTrace(this, this.constructor);
+    }
+    else {
+      this.stack = (new Error(message)).stack;
+    }
+  }
+}
+
+module.exports = TokenizeError;