[libsolidity] Prepare evm assembly json import.

Author: aarlt

libsolidity/interface/CompilerStack.cpp

@@ -388,6 +388,17 @@ bool CompilerStack::parse()
 	return !m_hasError;
 }
 
+void CompilerStack::importEvmAssemblyJson(map<string, Json::Value> const& _sources)
+{
+	solAssert(_sources.size() == 1, "");
+	if (m_stackState != Empty)
+		solThrow(CompilerError, "Must call importEvmAssemblyJson only before the SourcesSet state.");
+
+	m_evmAssemblyJson = std::make_unique<Json::Value>(_sources.begin()->second);
+	m_importedSources = true;
+	m_stackState = SourcesSet;
+}
+
 void CompilerStack::importASTs(map<string, Json::Value> const& _sources)
 {
 	if (m_stackState != Empty)

libsolidity/interface/CompilerStack.h

@@ -222,6 +222,8 @@ class CompilerStack: public langutil::CharStreamProvider
 	/// Will throw errors if the import fails
 	void importASTs(std::map<std::string, Json::Value> const& _sources);
 
+	void importEvmAssemblyJson(std::map<std::string, Json::Value> const& _sources);
+
 	/// Performs the analysis steps (imports, scopesetting, syntaxCheck, referenceResolving,
 	///  typechecking, staticAnalysis) on previously parsed sources.
 	/// @returns false on error.
@@ -499,6 +501,7 @@ class CompilerStack: public langutil::CharStreamProvider
 	std::map<std::string const, Source> m_sources;
 	// if imported, store AST-JSONS for each filename
 	std::map<std::string, Json::Value> m_sourceJsons;
+	std::unique_ptr<Json::Value> m_evmAssemblyJson;
 	std::vector<std::string> m_unhandledSMTLib2Queries;
 	std::map<util::h256, std::string> m_smtlib2Responses;
 	std::shared_ptr<GlobalContext> m_globalContext;