From 55ce6d2073eebb0aa70336034c0d0ba1dfe95f50 Mon Sep 17 00:00:00 2001
From: Sebastian <versat@users.noreply.github.com>
Date: Wed, 6 Feb 2019 13:23:05 +0100
Subject: [PATCH] qt.cfg: Add support and tests for QFile::exists function
 (#1645)

Found by daca@home
---
 cfg/qt.cfg      | 12 ++++++++++++
 test/cfg/qt.cpp | 16 ++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/cfg/qt.cfg b/cfg/qt.cfg
index 74fa18536..408ee1c30 100644
--- a/cfg/qt.cfg
+++ b/cfg/qt.cfg
@@ -1137,6 +1137,18 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- bool QFile::exists(const QString &fileName) // static -->
+  <!-- bool QFile::exists() const -->
+  <function name="QFile::exists">
+    <noreturn>false</noreturn>
+    <returnValue type="bool"/>
+    <use-retval/>
+    <leak-ignore/>
+    <arg nr="1" default="&quot;&quot;">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <!-- bool QFile::open(OpenMode mode) -->
   <!-- bool QFile::open(FILE *fh, OpenMode mode, FileHandleFlags handleFlags = DontCloseHandle) -->
   <!-- bool QFile::open(int fd, OpenMode mode, FileHandleFlags handleFlags = DontCloseHandle) -->
diff --git a/test/cfg/qt.cpp b/test/cfg/qt.cpp
index 849c5b3f8..5b24fcdb9 100644
--- a/test/cfg/qt.cpp
+++ b/test/cfg/qt.cpp
@@ -10,6 +10,7 @@
 #include <QObject>
 #include <QString>
 #include <QtPlugin>
+#include <QFile>
 
 
 void QString1(QString s)
@@ -36,3 +37,18 @@ public:
     explicit MacroTest1(QObject *parent = 0);
     ~MacroTest1();
 };
+
+void validCode()
+{
+    if (QFile::exists("test"))
+    {}
+}
+
+void ignoredReturnValue()
+{
+    // cppcheck-suppress ignoredReturnValue
+    QFile::exists("test");
+    QFile file1("test");
+    // cppcheck-suppress ignoredReturnValue
+    file1.exists();
+}