From 2decea8cff949de8223b15fd053e41eada1c1be5 Mon Sep 17 00:00:00 2001
From: Forbes Lindesay <forbes@lindesay.co.uk>
Date: Wed, 7 Mar 2018 12:34:33 +0000
Subject: [PATCH] Handle boolean sorthand for filters

[closes #2966]
---
 packages/pug-filters/lib/handle-filters.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/pug-filters/lib/handle-filters.js b/packages/pug-filters/lib/handle-filters.js
index fc00fb0b4..91cac9539 100644
--- a/packages/pug-filters/lib/handle-filters.js
+++ b/packages/pug-filters/lib/handle-filters.js
@@ -94,7 +94,7 @@ function getAttributes(node, options) {
   var attrs = {};
   node.attrs.forEach(function (attr) {
     try {
-      attrs[attr.name] = constantinople.toConstant(attr.val);
+      attrs[attr.name] = attr.val === true ? true : constantinople.toConstant(attr.val);
     } catch (ex) {
       if (/not constant/.test(ex.message)) {
         throw error('FILTER_OPTION_NOT_CONSTANT', ex.message + ' All filters are rendered compile-time so filter options must be constants.', node);