| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_BLOCK |
| #define SKSL_BLOCK |
| |
| #include "src/sksl/ir/SkSLStatement.h" |
| #include "src/sksl/ir/SkSLSymbolTable.h" |
| |
| namespace SkSL { |
| |
| /** |
| * A block of multiple statements functioning as a single statement. |
| */ |
| class Block final : public Statement { |
| public: |
| static constexpr Kind kStatementKind = Kind::kBlock; |
| |
| Block(int offset, StatementArray statements, |
| const std::shared_ptr<SymbolTable> symbols = nullptr, bool isScope = true) |
| : INHERITED(offset, kStatementKind) |
| , fChildren(std::move(statements)) |
| , fSymbolTable(std::move(symbols)) |
| , fIsScope(isScope) {} |
| |
| const StatementArray& children() const { |
| return fChildren; |
| } |
| |
| StatementArray& children() { |
| return fChildren; |
| } |
| |
| bool isScope() const { |
| return fIsScope; |
| } |
| |
| void setIsScope(bool isScope) { |
| fIsScope = isScope; |
| } |
| |
| std::shared_ptr<SymbolTable> symbolTable() const { |
| return fSymbolTable; |
| } |
| |
| bool isEmpty() const override { |
| for (const std::unique_ptr<Statement>& stmt : this->children()) { |
| if (!stmt->isEmpty()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| std::unique_ptr<Statement> clone() const override { |
| StatementArray cloned; |
| cloned.reserve_back(this->children().size()); |
| for (const std::unique_ptr<Statement>& stmt : this->children()) { |
| cloned.push_back(stmt->clone()); |
| } |
| return std::make_unique<Block>(fOffset, std::move(cloned), |
| SymbolTable::WrapIfBuiltin(this->symbolTable()), |
| this->isScope()); |
| } |
| |
| String description() const override { |
| String result; |
| if (fIsScope) { |
| result += "{"; |
| } |
| for (const std::unique_ptr<Statement>& stmt : this->children()) { |
| result += "\n"; |
| result += stmt->description(); |
| } |
| result += fIsScope ? "\n}\n" : "\n"; |
| return result; |
| } |
| |
| private: |
| StatementArray fChildren; |
| std::shared_ptr<SymbolTable> fSymbolTable; |
| // if isScope is false, this is just a group of statements rather than an actual |
| // language-level block. This allows us to pass around multiple statements as if they were a |
| // single unit, with no semantic impact. |
| bool fIsScope; |
| |
| using INHERITED = Statement; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |