Tag errors with a specific constructor to simplify their detection

2 files changed, 12 insertions, 1 deletions

diff --git a/src/index.js b/src/index.js
index 01ad5a6..8a2e468 100644
--- a/src/index.js
+++ b/src/index.js
@@ -238,7 +238,7 @@ module.exports = function purescriptLoader(source, map) {
           modules.push(desc);
         }
 
-        CACHE_VAR.errors.push(Object.assign(new Error(pscMessage), { modules }));
+        CACHE_VAR.errors.push(new utils.PscError(pscMessage, modules));
       }
     }
   }
diff --git a/src/utils.js b/src/utils.js
index 0ab00eb..671b580 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,5 +1,16 @@
 const path = require('path');
 
+exports.PscError = class PscError extends Error {
+  constructor(message, modules) {
+    super(message);
+    this.modules = modules;
+  }
+
+  static get name() {
+    return 'PscError';
+  }
+};
+
 const repeat = (value, times) =>
   times <= 0 ? [] : [value, ...repeat(value, times - 1)];
 const diffPursModuleNames = (from, target, parts) => {