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/*
* Copyright 2017 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WABT_EXPR_VISITOR_H_
#define WABT_EXPR_VISITOR_H_
#include "common.h"
namespace wabt {
struct Expr;
struct Func;
class ExprVisitor {
public:
class Delegate;
class DelegateNop;
explicit ExprVisitor(Delegate* delegate);
Result VisitExpr(Expr*);
Result VisitExprList(Expr*);
Result VisitFunc(Func*);
private:
Delegate* delegate_;
};
class ExprVisitor::Delegate {
public:
virtual ~Delegate() {}
virtual Result OnBinaryExpr(Expr*) = 0;
virtual Result BeginBlockExpr(Expr*) = 0;
virtual Result EndBlockExpr(Expr*) = 0;
virtual Result OnBrExpr(Expr*) = 0;
virtual Result OnBrIfExpr(Expr*) = 0;
virtual Result OnBrTableExpr(Expr*) = 0;
virtual Result OnCallExpr(Expr*) = 0;
virtual Result OnCallIndirectExpr(Expr*) = 0;
virtual Result OnCompareExpr(Expr*) = 0;
virtual Result OnConstExpr(Expr*) = 0;
virtual Result OnConvertExpr(Expr*) = 0;
virtual Result OnCurrentMemoryExpr(Expr*) = 0;
virtual Result OnDropExpr(Expr*) = 0;
virtual Result OnGetGlobalExpr(Expr*) = 0;
virtual Result OnGetLocalExpr(Expr*) = 0;
virtual Result OnGrowMemoryExpr(Expr*) = 0;
virtual Result BeginIfExpr(Expr*) = 0;
virtual Result AfterIfTrueExpr(Expr*) = 0;
virtual Result EndIfExpr(Expr*) = 0;
virtual Result OnLoadExpr(Expr*) = 0;
virtual Result BeginLoopExpr(Expr*) = 0;
virtual Result EndLoopExpr(Expr*) = 0;
virtual Result OnNopExpr(Expr*) = 0;
virtual Result OnReturnExpr(Expr*) = 0;
virtual Result OnSelectExpr(Expr*) = 0;
virtual Result OnSetGlobalExpr(Expr*) = 0;
virtual Result OnSetLocalExpr(Expr*) = 0;
virtual Result OnStoreExpr(Expr*) = 0;
virtual Result OnTeeLocalExpr(Expr*) = 0;
virtual Result OnUnaryExpr(Expr*) = 0;
virtual Result OnUnreachableExpr(Expr*) = 0;
};
class ExprVisitor::DelegateNop : public ExprVisitor::Delegate {
public:
Result OnBinaryExpr(Expr*) override { return Result::Ok; }
Result BeginBlockExpr(Expr*) override { return Result::Ok; }
Result EndBlockExpr(Expr*) override { return Result::Ok; }
Result OnBrExpr(Expr*) override { return Result::Ok; }
Result OnBrIfExpr(Expr*) override { return Result::Ok; }
Result OnBrTableExpr(Expr*) override { return Result::Ok; }
Result OnCallExpr(Expr*) override { return Result::Ok; }
Result OnCallIndirectExpr(Expr*) override { return Result::Ok; }
Result OnCompareExpr(Expr*) override { return Result::Ok; }
Result OnConstExpr(Expr*) override { return Result::Ok; }
Result OnConvertExpr(Expr*) override { return Result::Ok; }
Result OnCurrentMemoryExpr(Expr*) override { return Result::Ok; }
Result OnDropExpr(Expr*) override { return Result::Ok; }
Result OnGetGlobalExpr(Expr*) override { return Result::Ok; }
Result OnGetLocalExpr(Expr*) override { return Result::Ok; }
Result OnGrowMemoryExpr(Expr*) override { return Result::Ok; }
Result BeginIfExpr(Expr*) override { return Result::Ok; }
Result AfterIfTrueExpr(Expr*) override { return Result::Ok; }
Result EndIfExpr(Expr*) override { return Result::Ok; }
Result OnLoadExpr(Expr*) override { return Result::Ok; }
Result BeginLoopExpr(Expr*) override { return Result::Ok; }
Result EndLoopExpr(Expr*) override { return Result::Ok; }
Result OnNopExpr(Expr*) override { return Result::Ok; }
Result OnReturnExpr(Expr*) override { return Result::Ok; }
Result OnSelectExpr(Expr*) override { return Result::Ok; }
Result OnSetGlobalExpr(Expr*) override { return Result::Ok; }
Result OnSetLocalExpr(Expr*) override { return Result::Ok; }
Result OnStoreExpr(Expr*) override { return Result::Ok; }
Result OnTeeLocalExpr(Expr*) override { return Result::Ok; }
Result OnUnaryExpr(Expr*) override { return Result::Ok; }
Result OnUnreachableExpr(Expr*) override { return Result::Ok; }
};
} // namespace wabt
#endif // WABT_EXPR_VISITOR_H_
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