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// Copyright 2018 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_AST_SOURCE_RANGE_AST_VISITOR_H_ #define V8_AST_SOURCE_RANGE_AST_VISITOR_H_ #include <unordered_set> #include "src/ast/ast-traversal-visitor.h" namespace v8 { namespace internal { class SourceRangeMap; // Post-processes generated source ranges while the AST structure still exists. // // In particular, SourceRangeAstVisitor // // 1. deduplicates continuation source ranges, only keeping the outermost one. // See also: https://crbug.com/v8/8539. // // 2. removes the source range associated with the final statement in a block // or function body if the parent itself has a source range associated with it. // See also: https://crbug.com/v8/8381. class SourceRangeAstVisitor final : public AstTraversalVisitor<SourceRangeAstVisitor> { public: SourceRangeAstVisitor(uintptr_t stack_limit, Expression* root, SourceRangeMap* source_range_map); private: friend class AstTraversalVisitor<SourceRangeAstVisitor>; void VisitBlock(Block* stmt); void VisitSwitchStatement(SwitchStatement* stmt); void VisitFunctionLiteral(FunctionLiteral* expr); bool VisitNode(AstNode* node); void MaybeRemoveLastContinuationRange(ZonePtrList<Statement>* stmts); SourceRangeMap* source_range_map_ = nullptr; std::unordered_set<int> continuation_positions_; }; } // namespace internal } // namespace v8 #endif // V8_AST_SOURCE_RANGE_AST_VISITOR_H_