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/*
* 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_CONSTRUCTOR
#define SKSL_CONSTRUCTOR
#include "SkSLExpression.h"
#include "SkSLFloatLiteral.h"
#include "SkSLIntLiteral.h"
#include "SkSLIRGenerator.h"
namespace SkSL {
/**
* Represents the construction of a compound type, such as "vec2(x, y)".
*/
struct Constructor : public Expression {
Constructor(Position position, const Type& type,
std::vector<std::unique_ptr<Expression>> arguments)
: INHERITED(position, kConstructor_Kind, type)
, fArguments(std::move(arguments)) {}
std::unique_ptr<Expression> constantPropagate(const IRGenerator& irGenerator,
const DefinitionMap& definitions) override {
if (fArguments.size() == 1 && fArguments[0]->fKind == Expression::kIntLiteral_Kind) {
if (fType == *irGenerator.fContext.fFloat_Type) {
// promote float(1) to 1.0
int64_t intValue = ((IntLiteral&) *fArguments[0]).fValue;
return std::unique_ptr<Expression>(new FloatLiteral(irGenerator.fContext,
fPosition,
intValue));
} else if (fType == *irGenerator.fContext.fUInt_Type) {
// promote uint(1) to 1u
int64_t intValue = ((IntLiteral&) *fArguments[0]).fValue;
return std::unique_ptr<Expression>(new IntLiteral(irGenerator.fContext,
fPosition,
intValue,
&fType));
}
}
return nullptr;
}
bool hasSideEffects() const override {
for (const auto& arg : fArguments) {
if (arg->hasSideEffects()) {
return true;
}
}
return false;
}
SkString description() const override {
SkString result = fType.description() + "(";
SkString separator;
for (size_t i = 0; i < fArguments.size(); i++) {
result += separator;
result += fArguments[i]->description();
separator = ", ";
}
result += ")";
return result;
}
bool isConstant() const override {
for (size_t i = 0; i < fArguments.size(); i++) {
if (!fArguments[i]->isConstant()) {
return false;
}
}
return true;
}
std::vector<std::unique_ptr<Expression>> fArguments;
typedef Expression INHERITED;
};
} // namespace
#endif
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