From 154002cda05a75203b625d23ce507787bd5fa5e4 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Wed, 14 Jun 2017 00:07:13 +0200
Subject: Move "active variable" to analysis phase.

---
 libsolidity/inlineasm/AsmAnalysis.cpp |  8 ++++----
 libsolidity/inlineasm/AsmAnalysis.h   |  8 +++++---
 libsolidity/inlineasm/AsmScope.h      | 10 +---------
 3 files changed, 10 insertions(+), 16 deletions(-)

(limited to 'libsolidity/inlineasm')

diff --git a/libsolidity/inlineasm/AsmAnalysis.cpp b/libsolidity/inlineasm/AsmAnalysis.cpp
index 13852880..bb30fce1 100644
--- a/libsolidity/inlineasm/AsmAnalysis.cpp
+++ b/libsolidity/inlineasm/AsmAnalysis.cpp
@@ -91,7 +91,7 @@ bool AsmAnalyzer::operator()(assembly::Identifier const& _identifier)
 	if (m_currentScope->lookup(_identifier.name, Scope::Visitor(
 		[&](Scope::Variable const& _var)
 		{
-			if (!_var.active)
+			if (!m_activeVariables.count(&_var))
 			{
 				m_errorReporter.declarationError(
 					_identifier.location,
@@ -185,7 +185,7 @@ bool AsmAnalyzer::operator()(assembly::VariableDeclaration const& _varDecl)
 	for (auto const& variable: _varDecl.variables)
 	{
 		expectValidType(variable.type, variable.location);
-		boost::get<Scope::Variable>(m_currentScope->identifiers.at(variable.name)).active = true;
+		m_activeVariables.insert(&boost::get<Scope::Variable>(m_currentScope->identifiers.at(variable.name)));
 	}
 	m_info.stackHeightInfo[&_varDecl] = m_stackHeight;
 	return success;
@@ -199,7 +199,7 @@ bool AsmAnalyzer::operator()(assembly::FunctionDefinition const& _funDef)
 	for (auto const& var: _funDef.arguments + _funDef.returns)
 	{
 		expectValidType(var.type, var.location);
-		boost::get<Scope::Variable>(varScope.identifiers.at(var.name)).active = true;
+		m_activeVariables.insert(&boost::get<Scope::Variable>(varScope.identifiers.at(var.name)));
 	}
 
 	int const stackHeight = m_stackHeight;
@@ -382,7 +382,7 @@ bool AsmAnalyzer::checkAssignment(assembly::Identifier const& _variable, size_t
 			m_errorReporter.typeError(_variable.location, "Assignment requires variable.");
 			success = false;
 		}
-		else if (!boost::get<Scope::Variable>(*var).active)
+		else if (!m_activeVariables.count(&boost::get<Scope::Variable>(*var)))
 		{
 			m_errorReporter.declarationError(
 				_variable.location,
diff --git a/libsolidity/inlineasm/AsmAnalysis.h b/libsolidity/inlineasm/AsmAnalysis.h
index e7748bcf..cd195d97 100644
--- a/libsolidity/inlineasm/AsmAnalysis.h
+++ b/libsolidity/inlineasm/AsmAnalysis.h
@@ -22,6 +22,8 @@
 
 #include <libsolidity/interface/Exceptions.h>
 
+#include <libsolidity/inlineasm/AsmScope.h>
+
 #include <libjulia/backends/evm/AbstractAssembly.h>
 
 #include <boost/variant.hpp>
@@ -51,9 +53,6 @@ struct FunctionCall;
 struct Switch;
 using Statement = boost::variant<Instruction, Literal, Label, StackAssignment, Identifier, Assignment, FunctionCall, FunctionalInstruction, VariableDeclaration, FunctionDefinition, Switch, Block>;
 
-
-struct Scope;
-
 struct AsmAnalysisInfo;
 
 /**
@@ -101,6 +100,9 @@ private:
 	int m_stackHeight = 0;
 	julia::ExternalIdentifierAccess::Resolver m_resolver;
 	Scope* m_currentScope = nullptr;
+	/// Variables that are active at the current point in assembly (as opposed to
+	/// "part of the scope but not yet declared")
+	std::set<Scope::Variable const*> m_activeVariables;
 	AsmAnalysisInfo& m_info;
 	ErrorReporter& m_errorReporter;
 	bool m_julia = false;
diff --git a/libsolidity/inlineasm/AsmScope.h b/libsolidity/inlineasm/AsmScope.h
index c8e38c8a..de9119e0 100644
--- a/libsolidity/inlineasm/AsmScope.h
+++ b/libsolidity/inlineasm/AsmScope.h
@@ -65,16 +65,8 @@ struct Scope
 	using JuliaType = std::string;
 	using LabelID = size_t;
 
-	struct Variable
-	{
-		/// Used during analysis to check whether we already passed the declaration inside the block.
-		/// @todo move there.
-		bool active = false;
-		JuliaType type;
-	};
-
+	struct Variable { JuliaType type; };
 	struct Label { };
-
 	struct Function
 	{
 		std::vector<JuliaType> arguments;
-- 
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