Doc: make Qt Sql snippets compilable

Task-number: QTBUG-81496
Change-Id: Id6206e9179c2e8157c99e777a3de35bd83d49e34
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

1 files changed, 20 insertions, 6 deletions

diff --git a/src/sql/doc/snippets/code/src_sql_kernel_qsqldriver.cpp b/src/sql/doc/snippets/code/src_sql_kernel_qsqldriver.cpp
index a13cf86d3f..47e8701149 100644
--- a/src/sql/doc/snippets/code/src_sql_kernel_qsqldriver.cpp
+++ b/src/sql/doc/snippets/code/src_sql_kernel_qsqldriver.cpp
@@ -47,28 +47,42 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QSqlDriver>
+#include <QVariant>
 
+void checkHandle()
+{
+//dummy definitions
+typedef void sqlite3;
+typedef void PGconn;
+typedef void MYSQL;
 //! [0]
-QSqlDatabase db = ...;
+QSqlDatabase db = QSqlDatabase::database();
 QVariant v = db.driver()->handle();
-if (v.isValid() && qstrcmp(v.typeName(), "sqlite3*") == 0) {
+if (v.isValid() && (qstrcmp(v.typeName(), "sqlite3*") == 0)) {
     // v.data() returns a pointer to the handle
     sqlite3 *handle = *static_cast<sqlite3 **>(v.data());
     if (handle) {
-        ...
+        // ...
     }
 }
 //! [0]
 
-
 //! [1]
 if (qstrcmp(v.typeName(), "PGconn*") == 0) {
     PGconn *handle = *static_cast<PGconn **>(v.data());
-    if (handle) ...
+    if (handle) {
+        // ...
+    }
 }
 
 if (qstrcmp(v.typeName(), "MYSQL*") == 0) {
     MYSQL *handle = *static_cast<MYSQL **>(v.data());
-    if (handle) ...
+    if (handle) {
+        // ...
+    }
 }
 //! [1]
+}