| /* |
| * 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_BOOLLITERAL |
| #define SKSL_BOOLLITERAL |
| |
| #include "src/sksl/SkSLContext.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| namespace SkSL { |
| |
| /** |
| * Represents 'true' or 'false'. These are generally referred to as BoolLiteral, but Literal<bool> |
| * is also available for use with template code. |
| */ |
| template <typename T> class Literal; |
| using BoolLiteral = Literal<bool>; |
| |
| template <> |
| class Literal<bool> final : public Expression { |
| public: |
| static constexpr Kind kExpressionKind = Kind::kBoolLiteral; |
| |
| Literal(int offset, bool value, const Type* type) |
| : INHERITED(offset, kExpressionKind, type) |
| , fValue(value) {} |
| |
| // Makes a literal of boolean type. |
| static std::unique_ptr<BoolLiteral> Make(const Context& context, int offset, bool value) { |
| return std::make_unique<BoolLiteral>(offset, value, context.fTypes.fBool.get()); |
| } |
| |
| // Makes a literal of boolean type. (Functionally identical to the above, but useful if you |
| // don't have access to the Context.) |
| static std::unique_ptr<BoolLiteral> Make(int offset, bool value, const Type* type) { |
| SkASSERT(type->isBoolean()); |
| return std::make_unique<BoolLiteral>(offset, value, type); |
| } |
| |
| bool value() const { |
| return fValue; |
| } |
| |
| String description() const override { |
| return String(this->value() ? "true" : "false"); |
| } |
| |
| bool hasProperty(Property property) const override { |
| return false; |
| } |
| |
| bool isCompileTimeConstant() const override { |
| return true; |
| } |
| |
| ComparisonResult compareConstant(const Expression& other) const override { |
| if (!other.is<BoolLiteral>()) { |
| return ComparisonResult::kUnknown; |
| } |
| return this->value() == other.as<BoolLiteral>().value() ? ComparisonResult::kEqual |
| : ComparisonResult::kNotEqual; |
| } |
| |
| std::unique_ptr<Expression> clone() const override { |
| return std::make_unique<BoolLiteral>(fOffset, this->value(), &this->type()); |
| } |
| |
| bool allowsConstantSubexpressions() const override { |
| return true; |
| } |
| |
| const Expression* getConstantSubexpression(int n) const override { |
| SkASSERT(n == 0); |
| return this; |
| } |
| |
| private: |
| bool fValue; |
| |
| using INHERITED = Expression; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |