Mark appropriate constructors explicit

3 files changed, 3 insertions, 3 deletions

diff --git a/libsolidity/codegen/ArrayUtils.h b/libsolidity/codegen/ArrayUtils.h
index 806fbea7..f3ddc4ee 100644
--- a/libsolidity/codegen/ArrayUtils.h
+++ b/libsolidity/codegen/ArrayUtils.h
@@ -40,7 +40,7 @@ using TypePointer = std::shared_ptr<Type const>;
 class ArrayUtils
 {
 public:
-	ArrayUtils(CompilerContext& _context): m_context(_context) {}
+	explicit ArrayUtils(CompilerContext& _context): m_context(_context) {}
 
 	/// Copies an array to an array in storage. The arrays can be of different types only if
 	/// their storage representation is the same.
diff --git a/libsolidity/codegen/CompilerUtils.h b/libsolidity/codegen/CompilerUtils.h
index 09427788..18b70250 100644
--- a/libsolidity/codegen/CompilerUtils.h
+++ b/libsolidity/codegen/CompilerUtils.h
@@ -33,7 +33,7 @@ class Type; // forward
 class CompilerUtils
 {
 public:
-	CompilerUtils(CompilerContext& _context): m_context(_context) {}
+	explicit CompilerUtils(CompilerContext& _context): m_context(_context) {}
 
 	/// Stores the initial value of the free-memory-pointer at its position;
 	void initialiseFreeMemoryPointer();
diff --git a/libsolidity/codegen/ContractCompiler.cpp b/libsolidity/codegen/ContractCompiler.cpp
index 29a22fae..e53f1b94 100644
--- a/libsolidity/codegen/ContractCompiler.cpp
+++ b/libsolidity/codegen/ContractCompiler.cpp
@@ -45,7 +45,7 @@ using namespace dev::solidity;
 class StackHeightChecker
 {
 public:
-	StackHeightChecker(CompilerContext const& _context):
+	explicit StackHeightChecker(CompilerContext const& _context):
 		m_context(_context), stackHeight(m_context.stackHeight()) {}
 	void check() { solAssert(m_context.stackHeight() == stackHeight, std::string("I sense a disturbance in the stack: ") + std::to_string(m_context.stackHeight()) + " vs " + std::to_string(stackHeight)); }
 private: