3 files changed, 6 insertions, 6 deletions
diff --git a/dev/CompilerKit/ErrorOr.h b/dev/CompilerKit/ErrorOr.h
index 218bec5..ef6cb84 100644
--- a/dev/CompilerKit/ErrorOr.h
+++ b/dev/CompilerKit/ErrorOr.h
@@ -36,9 +36,9 @@ class ErrorOr final {
 
   Int32 Error() { return mId; }
 
-  BOOL HasError() { return mId != NECTI_SUCCESS; }
+  Bool HasError() { return mId != NECTI_SUCCESS; }
 
-  operator bool() { return mRef; }
+  explicit operator bool() { return mRef; }
 
  private:
   Ref<T> mRef;
diff --git a/dev/CompilerKit/Ref.h b/dev/CompilerKit/Ref.h
index bbe67de..381b628 100644
--- a/dev/CompilerKit/Ref.h
+++ b/dev/CompilerKit/Ref.h
@@ -47,7 +47,7 @@ class Ref final {
 
   Bool IsStrong() const { return m_Strong; }
 
-  operator bool() { return *m_Class; }
+  explicit operator bool() { return *m_Class; }
 
  private:
   T*   m_Class{nullptr};
diff --git a/dev/CompilerKit/StringKit.h b/dev/CompilerKit/StringKit.h
index 422d163..c4efbee 100644
--- a/dev/CompilerKit/StringKit.h
+++ b/dev/CompilerKit/StringKit.h
@@ -56,7 +56,7 @@ class BasicString final {
   BasicString& operator+=(const Char rhs);
   BasicString& operator+=(const BasicString& rhs);
 
-  operator bool() { return m_Data && m_Data[0] != 0; }
+  explicit operator bool() { return m_Data && m_Data[0] != 0; }
 
   bool operator!() { return !m_Data || m_Data[0] == 0; }
 
@@ -77,7 +77,7 @@ struct StringBuilder final {
   static BasicString FromInt(const char* fmt, int n);
   static BasicString FromBool(const char* fmt, bool n);
   static BasicString Format(const char* fmt, const char* from);
-  static BOOL        Equals(const char* lhs, const char* rhs);
+  static Bool        Equals(const char* lhs, const char* rhs);
 };
 
 using BasicStringOr  = ErrorOr<BasicString>;
@@ -85,4 +85,4 @@ using BasicStringPtr = BasicString*;
 using BasicStringRef = Ref<BasicString>;
 }  // namespace CompilerKit
 
-#endif /* ifndef __NECTI_STRINGKIT__ */
-\ No newline at end of file
+#endif /* ifndef __NECTI_STRINGKIT__ */