From 4b660aa941afdd6081f340c99b009fbc774e73dd Mon Sep 17 00:00:00 2001
From: orklah <ronan_morin@hotmail.com>
Date: Sat, 24 Jul 2021 10:51:10 +0200
Subject: [PATCH] handle every increment/decrement

---
 .../Expression/BinaryOp/NonDivArithmeticOpAnalyzer.php     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Psalm/Internal/Analyzer/Statements/Expression/BinaryOp/NonDivArithmeticOpAnalyzer.php b/src/Psalm/Internal/Analyzer/Statements/Expression/BinaryOp/NonDivArithmeticOpAnalyzer.php
index 7b59ea2224d..26e22b1f6d9 100644
--- a/src/Psalm/Internal/Analyzer/Statements/Expression/BinaryOp/NonDivArithmeticOpAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/Statements/Expression/BinaryOp/NonDivArithmeticOpAnalyzer.php
@@ -385,7 +385,12 @@ private static function analyzeNonDivOperands(
 
         if ($left_type_part instanceof Type\Atomic\TString
             && $right_type_part instanceof TInt
-            && $parent instanceof PhpParser\Node\Expr\PostInc
+            && (
+                $parent instanceof PhpParser\Node\Expr\PostInc ||
+                $parent instanceof PhpParser\Node\Expr\PreInc ||
+                $parent instanceof PhpParser\Node\Expr\PostDec ||
+                $parent instanceof PhpParser\Node\Expr\PreDec
+            )
         ) {
             if ($left_type_part instanceof Type\Atomic\TNumericString) {
                 $new_result_type = new Type\Union([new TFloat(), new TInt()]);