"external" visibility specifier.

1 files changed, 5 insertions, 2 deletions

diff --git a/AST.h b/AST.h
index 51d8031a..c40e24d1 100644
--- a/AST.h
+++ b/AST.h
@@ -133,7 +133,8 @@ class Declaration: public ASTNode
 {
 public:
 	enum class LValueType { None, Local, Storage };
-	enum class Visibility { Default, Public, Protected, Private };
+	/// Visibility ordered from restricted to unrestricted.
+	enum class Visibility { Default, Private, Protected, Public, External };
 
 	Declaration(Location const& _location, ASTPointer<ASTString> const& _name,
 				Visibility _visibility = Visibility::Default):
@@ -142,7 +143,9 @@ public:
 	/// @returns the declared name.
 	ASTString const& getName() const { return *m_name; }
 	Visibility getVisibility() const { return m_visibility == Visibility::Default ? getDefaultVisibility() : m_visibility; }
-	bool isPublic() const { return getVisibility() == Visibility::Public; }
+	bool isPublic() const { return getVisibility() >= Visibility::Public; }
+	bool isVisibleInContract() const { return getVisibility() != Visibility::External; }
+	bool isVisibleInDerivedContracts() const { return isVisibleInContract() && getVisibility() >= Visibility::Protected; }
 
 	/// @returns the scope this declaration resides in. Can be nullptr if it is the global scope.
 	/// Available only after name and type resolution step.