1 | /* |
---|---|
2 | * Copyright 2016 Google Inc. |
3 | * |
4 | * Use of this source code is governed by a BSD-style license that can be |
5 | * found in the LICENSE file. |
6 | */ |
7 | |
8 | #ifndef SKSL_BLOCK |
9 | #define SKSL_BLOCK |
10 | |
11 | #include "src/sksl/ir/SkSLStatement.h" |
12 | #include "src/sksl/ir/SkSLSymbolTable.h" |
13 | |
14 | namespace SkSL { |
15 | |
16 | /** |
17 | * A block of multiple statements functioning as a single statement. |
18 | */ |
19 | struct Block : public Statement { |
20 | Block(int offset, std::vector<std::unique_ptr<Statement>> statements, |
21 | const std::shared_ptr<SymbolTable> symbols = nullptr) |
22 | : INHERITED(offset, kBlock_Kind) |
23 | , fSymbols(std::move(symbols)) |
24 | , fStatements(std::move(statements)) {} |
25 | |
26 | bool isEmpty() const override { |
27 | for (const auto& s : fStatements) { |
28 | if (!s->isEmpty()) { |
29 | return false; |
30 | } |
31 | } |
32 | return true; |
33 | } |
34 | |
35 | std::unique_ptr<Statement> clone() const override { |
36 | std::vector<std::unique_ptr<Statement>> cloned; |
37 | for (const auto& s : fStatements) { |
38 | cloned.push_back(s->clone()); |
39 | } |
40 | return std::unique_ptr<Statement>(new Block(fOffset, std::move(cloned), fSymbols)); |
41 | } |
42 | |
43 | #ifdef SK_DEBUG |
44 | String description() const override { |
45 | String result("{"); |
46 | for (size_t i = 0; i < fStatements.size(); i++) { |
47 | result += "\n"; |
48 | result += fStatements[i]->description(); |
49 | } |
50 | result += "\n}\n"; |
51 | return result; |
52 | } |
53 | #endif |
54 | |
55 | // it's important to keep fStatements defined after (and thus destroyed before) fSymbols, |
56 | // because destroying statements can modify reference counts in symbols |
57 | const std::shared_ptr<SymbolTable> fSymbols; |
58 | std::vector<std::unique_ptr<Statement>> fStatements; |
59 | |
60 | typedef Statement INHERITED; |
61 | }; |
62 | |
63 | } // namespace |
64 | |
65 | #endif |
66 |