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 "src/sksl/SkSLAnalysis.h"
12 #include "src/sksl/SkSLContext.h"
13 #include "src/sksl/SkSLErrorReporter.h"
14 #include "src/sksl/SkSLOperator.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,
21 Position pos,
22 std::unique_ptr<Expression> base,
23 Operator op) {
24 if (base->type().isArray() || !base->type().componentType().isNumber()) {
25 context.fErrors->error(pos, "'" + std::string(op.tightOperatorName()) +
26 "' cannot operate on '" + base->type().displayName() + "'");
27 return nullptr;
28 }
29 if (!Analysis::UpdateVariableRefKind(base.get(), VariableRefKind::kReadWrite,
30 context.fErrors)) {
31 return nullptr;
32 }
33 return PostfixExpression::Make(context, pos, std::move(base), op);
34 }
35
Make(const Context & context,Position pos,std::unique_ptr<Expression> base,Operator op)36 std::unique_ptr<Expression> PostfixExpression::Make(const Context& context,
37 Position pos,
38 std::unique_ptr<Expression> base,
39 Operator op) {
40 SkASSERT(!base->type().isArray() && base->type().componentType().isNumber());
41 SkASSERT(Analysis::IsAssignable(*base));
42 return std::make_unique<PostfixExpression>(pos, std::move(base), op);
43 }
44
description(OperatorPrecedence parentPrecedence) const45 std::string PostfixExpression::description(OperatorPrecedence parentPrecedence) const {
46 bool needsParens = (OperatorPrecedence::kPostfix >= parentPrecedence);
47 return std::string(needsParens ? "(" : "") +
48 this->operand()->description(OperatorPrecedence::kPostfix) +
49 std::string(this->getOperator().tightOperatorName()) +
50 std::string(needsParens ? ")" : "");
51 }
52
53 } // namespace SkSL
54