1 /*
2 * Copyright 2021 Google LLC
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 #include "src/sksl/ir/SkSLPostfixExpression.h"
9
10 #include "include/core/SkTypes.h"
11 #include "include/sksl/SkSLErrorReporter.h"
12 #include "include/sksl/SkSLOperator.h"
13 #include "src/sksl/SkSLAnalysis.h"
14 #include "src/sksl/SkSLContext.h"
15 #include "src/sksl/ir/SkSLType.h"
16 #include "src/sksl/ir/SkSLVariableReference.h"
17
18 namespace SkSL {
19
Convert(const Context & context,Position pos,std::unique_ptr<Expression> base,Operator op)20 std::unique_ptr<Expression> PostfixExpression::Convert(const Context& context, Position pos,
21 std::unique_ptr<Expression> base, Operator op) {
22 const Type& baseType = base->type();
23 if (!baseType.isNumber()) {
24 context.fErrors->error(pos, "'" + std::string(op.tightOperatorName()) +
25 "' cannot operate on '" + baseType.displayName() + "'");
26 return nullptr;
27 }
28 if (!Analysis::UpdateVariableRefKind(base.get(), VariableRefKind::kReadWrite,
29 context.fErrors)) {
30 return nullptr;
31 }
32 return PostfixExpression::Make(context, pos, std::move(base), op);
33 }
34
Make(const Context & context,Position pos,std::unique_ptr<Expression> base,Operator op)35 std::unique_ptr<Expression> PostfixExpression::Make(const Context& context, Position pos,
36 std::unique_ptr<Expression> base, Operator op) {
37 SkASSERT(base->type().isNumber());
38 SkASSERT(Analysis::IsAssignable(*base));
39 return std::make_unique<PostfixExpression>(pos, std::move(base), op);
40 }
41
description(OperatorPrecedence parentPrecedence) const42 std::string PostfixExpression::description(OperatorPrecedence parentPrecedence) const {
43 bool needsParens = (OperatorPrecedence::kPostfix >= parentPrecedence);
44 return std::string(needsParens ? "(" : "") +
45 this->operand()->description(OperatorPrecedence::kPostfix) +
46 std::string(this->getOperator().tightOperatorName()) +
47 std::string(needsParens ? ")" : "");
48 }
49
50 } // namespace SkSL
51