本文整理汇总了C++中NullablePtr::isNonNull方法的典型用法代码示例。如果您正苦于以下问题：C++ NullablePtr::isNonNull方法的具体用法？C++ NullablePtr::isNonNull怎么用？C++ NullablePtr::isNonNull使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类NullablePtr的用法示例。
在下文中一共展示了NullablePtr::isNonNull方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: SILValue
SILInstruction *SILCombiner::visitSelectEnumInst(SelectEnumInst *SEI) {
// Canonicalize a select_enum: if the default refers to exactly one case, then
// replace the default with that case.
if (SEI->hasDefault()) {
NullablePtr<EnumElementDecl> elementDecl = SEI->getUniqueCaseForDefault();
if (elementDecl.isNonNull()) {
// Construct a new instruction by copying all the case entries.
SmallVector<std::pair<EnumElementDecl *, SILValue>, 4> CaseValues;
for (int idx = 0, numIdcs = SEI->getNumCases(); idx < numIdcs; idx++) {
CaseValues.push_back(SEI->getCase(idx));
}
// Add the default-entry of the original instruction as case-entry.
CaseValues.push_back(
std::make_pair(elementDecl.get(), SEI->getDefaultResult()));
return Builder.createSelectEnum(SEI->getLoc(), SEI->getEnumOperand(),
SEI->getType(), SILValue(), CaseValues);
}
}
// TODO: We should be able to flat-out replace the select_enum instruction
// with the selected value in another pass. For parity with the enum_is_tag
// combiner pass, handle integer literals for now.
auto *EI = dyn_cast<EnumInst>(SEI->getEnumOperand());
if (!EI)
return nullptr;
SILValue selected;
for (unsigned i = 0, e = SEI->getNumCases(); i < e; ++i) {
auto casePair = SEI->getCase(i);
if (casePair.first == EI->getElement()) {
selected = casePair.second;
break;
}
}
if (!selected)
selected = SEI->getDefaultResult();
if (auto *ILI = dyn_cast<IntegerLiteralInst>(selected)) {
return Builder.createIntegerLiteral(ILI->getLoc(), ILI->getType(),
ILI->getValue());
}
return nullptr;
}