3 files changed, 4 insertions, 4 deletions
diff --git a/libsolidity/parsing/Parser.cpp b/libsolidity/parsing/Parser.cpp
index d3a6aa45..7455cbca 100644
--- a/libsolidity/parsing/Parser.cpp
+++ b/libsolidity/parsing/Parser.cpp
@@ -40,7 +40,7 @@ namespace solidity
 class Parser::ASTNodeFactory
 {
 public:
-	ASTNodeFactory(Parser const& _parser):
+	explicit ASTNodeFactory(Parser const& _parser):
 		m_parser(_parser), m_location(_parser.position(), -1, _parser.sourceName()) {}
 	ASTNodeFactory(Parser const& _parser, ASTPointer<ASTNode> const& _childNode):
 		m_parser(_parser), m_location(_childNode->location()) {}
@@ -69,7 +69,7 @@ private:
 class Parser::RecursionGuard
 {
 public:
-	RecursionGuard(Parser& _parser):
+	explicit RecursionGuard(Parser& _parser):
 		m_parser(_parser)
 	{
 		m_parser.increaseRecursionDepth();
diff --git a/libsolidity/parsing/Parser.h b/libsolidity/parsing/Parser.h
index 5e6f3ef6..0f74880c 100644
--- a/libsolidity/parsing/Parser.h
+++ b/libsolidity/parsing/Parser.h
@@ -35,7 +35,7 @@ class Scanner;
 class Parser: public ParserBase
 {
 public:
-	Parser(ErrorReporter& _errorReporter): ParserBase(_errorReporter) {}
+	explicit Parser(ErrorReporter& _errorReporter): ParserBase(_errorReporter) {}
 
 	ASTPointer<SourceUnit> parse(std::shared_ptr<Scanner> const& _scanner);
 
diff --git a/libsolidity/parsing/ParserBase.h b/libsolidity/parsing/ParserBase.h
index 5b03ab5e..48733fc1 100644
--- a/libsolidity/parsing/ParserBase.h
+++ b/libsolidity/parsing/ParserBase.h
@@ -36,7 +36,7 @@ class Scanner;
 class ParserBase
 {
 public:
-	ParserBase(ErrorReporter& errorReporter): m_errorReporter(errorReporter) {}
+	explicit ParserBase(ErrorReporter& errorReporter): m_errorReporter(errorReporter) {}
 
 	std::shared_ptr<std::string const> const& sourceName() const;