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-rw-r--r--libsolidity/inlineasm/AsmScope.h105
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diff --git a/libsolidity/inlineasm/AsmScope.h b/libsolidity/inlineasm/AsmScope.h
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--- a/libsolidity/inlineasm/AsmScope.h
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-/*
- This file is part of solidity.
-
- solidity is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- solidity is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with solidity. If not, see <http://www.gnu.org/licenses/>.
-*/
-/**
- * Scopes for identifiers.
- */
-
-#pragma once
-
-#include <libsolidity/interface/Exceptions.h>
-
-#include <libyul/YulString.h>
-
-#include <libdevcore/Visitor.h>
-
-#include <boost/variant.hpp>
-#include <boost/optional.hpp>
-
-#include <functional>
-#include <memory>
-
-namespace dev
-{
-namespace solidity
-{
-namespace assembly
-{
-
-struct Scope
-{
- using YulType = yul::YulString;
- using LabelID = size_t;
-
- struct Variable { YulType type; };
- struct Label { };
- struct Function
- {
- std::vector<YulType> arguments;
- std::vector<YulType> returns;
- };
-
- using Identifier = boost::variant<Variable, Label, Function>;
- using Visitor = GenericVisitor<Variable const, Label const, Function const>;
- using NonconstVisitor = GenericVisitor<Variable, Label, Function>;
-
- bool registerVariable(yul::YulString _name, YulType const& _type);
- bool registerLabel(yul::YulString _name);
- bool registerFunction(
- yul::YulString _name,
- std::vector<YulType> const& _arguments,
- std::vector<YulType> const& _returns
- );
-
- /// Looks up the identifier in this or super scopes and returns a valid pointer if found
- /// or a nullptr if not found. Variable lookups up across function boundaries will fail, as
- /// will any lookups across assembly boundaries.
- /// The pointer will be invalidated if the scope is modified.
- /// @param _crossedFunction if true, we already crossed a function boundary during recursive lookup
- Identifier* lookup(yul::YulString _name);
- /// Looks up the identifier in this and super scopes (will not find variables across function
- /// boundaries and generally stops at assembly boundaries) and calls the visitor, returns
- /// false if not found.
- template <class V>
- bool lookup(yul::YulString _name, V const& _visitor)
- {
- if (Identifier* id = lookup(_name))
- {
- boost::apply_visitor(_visitor, *id);
- return true;
- }
- else
- return false;
- }
- /// @returns true if the name exists in this scope or in super scopes (also searches
- /// across function and assembly boundaries).
- bool exists(yul::YulString _name) const;
-
- /// @returns the number of variables directly registered inside the scope.
- size_t numberOfVariables() const;
- /// @returns true if this scope is inside a function.
- bool insideFunction() const;
-
- Scope* superScope = nullptr;
- /// If true, variables from the super scope are not visible here (other identifiers are),
- /// but they are still taken into account to prevent shadowing.
- bool functionScope = false;
- std::map<yul::YulString, Identifier> identifiers;
-};
-
-}
-}
-}