Declare single-argument (non-converting) constructors "explicit"

In order to avoid unintended implicit conversions.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
index dd3b13c8c8..2ddac2f076 100644
--- a/src/test/test_bitcoin.h
+++ b/src/test/test_bitcoin.h
@@ -41,7 +41,7 @@ static inline bool InsecureRandBool() { return insecure_rand_ctx.randbool(); }
 struct BasicTestingSetup {
     ECCVerifyHandle globalVerifyHandle;
 
-    BasicTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
+    explicit BasicTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
     ~BasicTestingSetup();
 };
 
@@ -56,7 +56,7 @@ struct TestingSetup: public BasicTestingSetup {
     CConnman* connman;
     CScheduler scheduler;
 
-    TestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
+    explicit TestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
     ~TestingSetup();
 };