Use all referenced errors.

libsolidity/ast/AST.cpp

@@ -23,6 +23,7 @@
 
 #include <libsolidity/ast/AST.h>
 
+#include <libsolidity/ast/CallGraph.h>
 #include <libsolidity/ast/ASTVisitor.h>
 #include <libsolidity/ast/AST_accept.h>
 #include <libsolidity/ast/TypeProvider.h>
@@ -174,12 +175,19 @@ vector<EventDefinition const*> const& ContractDefinition::interfaceEvents() cons
 	});
 }
 
-vector<ErrorDefinition const*> ContractDefinition::interfaceErrors() const
+vector<ErrorDefinition const*> ContractDefinition::interfaceErrors(bool _requireCallGraph) const
 {
 	set<ErrorDefinition const*, CompareByID> result;
-	// TODO add all referenced errors
 	for (ContractDefinition const* contract: annotation().linearizedBaseContracts)
 		result += filteredNodes<ErrorDefinition>(contract->m_subNodes);
+	solAssert(annotation().creationCallGraph.set() == annotation().deployedCallGraph.set(), "");
+	if (_requireCallGraph)
+		solAssert(annotation().creationCallGraph.set(), "");
+	if (annotation().creationCallGraph.set())
+	{
+		result += (*annotation().creationCallGraph)->usedErrors;
+		result += (*annotation().deployedCallGraph)->usedErrors;
+	}
 	return convertContainer<vector<ErrorDefinition const*>>(move(result));
 }
 

libsolidity/ast/AST.h

@@ -515,7 +515,8 @@ public:
 	std::vector<EventDefinition const*> const& interfaceEvents() const;
 	/// @returns all errors defined in this contract or any base contract
 	/// and all errors referenced during execution.
-	std::vector<ErrorDefinition const*> interfaceErrors() const;
+	/// @param _requireCallGraph if false, do not fail if the call graph has not been computed yet.
+	std::vector<ErrorDefinition const*> interfaceErrors(bool _requireCallGraph = true) const;
 	bool isInterface() const { return m_contractKind == ContractKind::Interface; }
 	bool isLibrary() const { return m_contractKind == ContractKind::Library; }
 

libsolidity/ast/CallGraph.h

@@ -67,6 +67,9 @@ struct CallGraph
 
 	/// Events that may get emitted by functions present in the graph.
 	std::set<EventDefinition const*, ASTNode::CompareByID> emittedEvents;
+
+	/// Errors that are used by functions present in the graph.
+	std::set<ErrorDefinition const*, ASTNode::CompareByID> usedErrors;
 };
 
 }