| /* |
| * 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_NULLLITERAL |
| #define SKSL_NULLLITERAL |
| |
| #include "src/sksl/SkSLContext.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| namespace SkSL { |
| |
| /** |
| * Represents 'null'. |
| */ |
| struct NullLiteral : public Expression { |
| NullLiteral(const Context& context, int offset) |
| : INHERITED(offset, kNullLiteral_Kind, *context.fNull_Type) {} |
| |
| NullLiteral(int offset, const Type& type) |
| : INHERITED(offset, kNullLiteral_Kind, type) {} |
| |
| String description() const override { |
| return "null"; |
| } |
| |
| bool hasProperty(Property property) const override { |
| return false; |
| } |
| |
| bool isConstant() const override { |
| return true; |
| } |
| |
| bool compareConstant(const Context& context, const Expression& other) const override { |
| return true; |
| } |
| |
| int nodeCount() const override { |
| return 1; |
| } |
| |
| std::unique_ptr<Expression> clone() const override { |
| return std::unique_ptr<Expression>(new NullLiteral(fOffset, fType)); |
| } |
| |
| typedef Expression INHERITED; |
| }; |
| |
| } // namespace |
| |
| #endif |