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_NULLLITERAL |
9 | #define SKSL_NULLLITERAL |
10 | |
11 | #include "src/sksl/SkSLContext.h" |
12 | #include "src/sksl/ir/SkSLExpression.h" |
13 | |
14 | namespace SkSL { |
15 | |
16 | /** |
17 | * Represents 'null'. |
18 | */ |
19 | struct NullLiteral : public Expression { |
20 | NullLiteral(const Context& context, int offset) |
21 | : INHERITED(offset, kNullLiteral_Kind, *context.fNull_Type) {} |
22 | |
23 | NullLiteral(int offset, const Type& type) |
24 | : INHERITED(offset, kNullLiteral_Kind, type) {} |
25 | |
26 | String description() const override { |
27 | return "null" ; |
28 | } |
29 | |
30 | bool hasProperty(Property property) const override { |
31 | return false; |
32 | } |
33 | |
34 | bool isCompileTimeConstant() const override { |
35 | return true; |
36 | } |
37 | |
38 | bool compareConstant(const Context& context, const Expression& other) const override { |
39 | return true; |
40 | } |
41 | |
42 | int nodeCount() const override { |
43 | return 1; |
44 | } |
45 | |
46 | std::unique_ptr<Expression> clone() const override { |
47 | return std::unique_ptr<Expression>(new NullLiteral(fOffset, fType)); |
48 | } |
49 | |
50 | typedef Expression INHERITED; |
51 | }; |
52 | |
53 | } // namespace SkSL |
54 | |
55 | #endif |
56 | |