Fix #313

src/collector/backend/parser/UnitCollectingVisitor.php

@@ -482,6 +482,16 @@ private function resolveExpressionValue(Expr $expr) {
                 );
             }
 
+            if ($expr instanceof BinaryOp) {
+                $code = (new \PhpParser\PrettyPrinter\Standard)->prettyPrint([$expr]);
+
+                return array(
+                    'type' => 'expression',
+                    'value' => substr($code,0,-1)
+                );
+
+            }
+
             $type = get_class($expr);
             $line = $expr->getLine();
             $file = $this->result->getFileName();

tests/data/issue313/src/bug.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+class bug {
+    const FOO = 'a' . 'b' . 'c' . 'd';
+    const BAZ = ((5 - 1) / 2)  . 'em';
+    const BAR = 1 + 2 + 3;
+}

tests/data/issue313/test.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<phpdox xmlns="http://xml.phpdox.net/config" silent="false">
+
+    <project name="phpDox-issue300" source="${basedir}/src" workdir="${basedir}/xml">
+
+        <collector publiconly="false" backend="parser" />
+
+        <generator output="${basedir}/docs">
+            <build engine="html" enabled="true" output="html" />
+            <build engine="xml" enabled="true" output="xml" />
+        </generator>
+
+    </project>
+
+</phpdox>