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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_VARDECLARATIONS
#define SKSL_VARDECLARATIONS
#include "SkSLExpression.h"
#include "SkSLProgramElement.h"
#include "SkSLStatement.h"
#include "SkSLVariable.h"
namespace SkSL {
/**
* A single variable declaration within a var declaration statement. For instance, the statement
* 'int x = 2, y[3];' is a VarDeclarations statement containing two individual VarDeclaration
* instances.
*/
struct VarDeclaration : public Statement {
VarDeclaration(const Variable* var,
std::vector<std::unique_ptr<Expression>> sizes,
std::unique_ptr<Expression> value)
: INHERITED(var->fOffset, Statement::kVarDeclaration_Kind)
, fVar(var)
, fSizes(std::move(sizes))
, fValue(std::move(value)) {}
std::unique_ptr<Statement> clone() const override {
std::vector<std::unique_ptr<Expression>> sizesClone;
for (const auto& s : fSizes) {
if (s) {
sizesClone.push_back(s->clone());
} else {
sizesClone.push_back(nullptr);
}
}
return std::unique_ptr<Statement>(new VarDeclaration(fVar, std::move(sizesClone),
fValue ? fValue->clone() : nullptr));
}
String description() const override {
String result = fVar->fName;
for (const auto& size : fSizes) {
if (size) {
result += "[" + size->description() + "]";
} else {
result += "[]";
}
}
if (fValue) {
result += " = " + fValue->description();
}
return result;
}
const Variable* fVar;
std::vector<std::unique_ptr<Expression>> fSizes;
std::unique_ptr<Expression> fValue;
typedef Statement INHERITED;
};
/**
* A variable declaration statement, which may consist of one or more individual variables.
*/
struct VarDeclarations : public ProgramElement {
VarDeclarations(int offset, const Type* baseType,
std::vector<std::unique_ptr<VarDeclaration>> vars)
: INHERITED(offset, kVar_Kind)
, fBaseType(*baseType) {
for (auto& var : vars) {
fVars.push_back(std::unique_ptr<Statement>(var.release()));
}
}
std::unique_ptr<ProgramElement> clone() const override {
std::vector<std::unique_ptr<VarDeclaration>> cloned;
for (const auto& v : fVars) {
cloned.push_back(std::unique_ptr<VarDeclaration>(
(VarDeclaration*) v->clone().release()));
}
return std::unique_ptr<ProgramElement>(new VarDeclarations(fOffset, &fBaseType,
std::move(cloned)));
}
String description() const override {
if (!fVars.size()) {
return String();
}
String result = ((VarDeclaration&) *fVars[0]).fVar->fModifiers.description() +
fBaseType.description() + " ";
String separator;
for (const auto& var : fVars) {
result += separator;
separator = ", ";
result += var->description();
}
return result;
}
const Type& fBaseType;
// this *should* be a vector of unique_ptr<VarDeclaration>, but it significantly simplifies the
// CFG to only have to worry about unique_ptr<Statement>
std::vector<std::unique_ptr<Statement>> fVars;
typedef ProgramElement INHERITED;
};
} // namespace
#endif
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