本文整理汇总了C++中VariableDeclaration::isConstant方法的典型用法代码示例。如果您正苦于以下问题：C++ VariableDeclaration::isConstant方法的具体用法？C++ VariableDeclaration::isConstant怎么用？C++ VariableDeclaration::isConstant使用的例子？那么恭喜您, 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VariableDeclaration的用法示例。
在下文中一共展示了VariableDeclaration::isConstant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: endVisit
void ReferencesResolver::endVisit(VariableDeclaration const& _variable)
{
if (_variable.annotation().type)
return;
TypePointer type;
if (_variable.typeName())
{
type = _variable.typeName()->annotation().type;
using Location = VariableDeclaration::Location;
Location varLoc = _variable.referenceLocation();
DataLocation typeLoc = DataLocation::Memory;
// References are forced to calldata for external function parameters (not return)
// and memory for parameters (also return) of publicly visible functions.
// They default to memory for function parameters and storage for local variables.
// As an exception, "storage" is allowed for library functions.
if (auto ref = dynamic_cast<ReferenceType const*>(type.get()))
{
bool isPointer = true;
if (_variable.isExternalCallableParameter())
{
auto const& contract = dynamic_cast<ContractDefinition const&>(*_variable.scope()->scope());
if (contract.isLibrary())
{
if (varLoc == Location::Memory)
fatalTypeError(_variable.location(),
"Location has to be calldata or storage for external "
"library functions (remove the \"memory\" keyword)."
);
}
else
{
// force location of external function parameters (not return) to calldata
if (varLoc != Location::Default)
fatalTypeError(_variable.location(),
"Location has to be calldata for external functions "
"(remove the \"memory\" or \"storage\" keyword)."
);
}
if (varLoc == Location::Default)
typeLoc = DataLocation::CallData;
else
typeLoc = varLoc == Location::Memory ? DataLocation::Memory : DataLocation::Storage;
}
else if (_variable.isCallableParameter() && _variable.scope()->isPublic())
{
auto const& contract = dynamic_cast<ContractDefinition const&>(*_variable.scope()->scope());
// force locations of public or external function (return) parameters to memory
if (varLoc == Location::Storage && !contract.isLibrary())
fatalTypeError(_variable.location(),
"Location has to be memory for publicly visible functions "
"(remove the \"storage\" keyword)."
);
if (varLoc == Location::Default || !contract.isLibrary())
typeLoc = DataLocation::Memory;
else
typeLoc = varLoc == Location::Memory ? DataLocation::Memory : DataLocation::Storage;
}
else
{
if (_variable.isConstant())
{
if (varLoc != Location::Default && varLoc != Location::Memory)
fatalTypeError(
_variable.location(),
"Storage location has to be \"memory\" (or unspecified) for constants."
);
typeLoc = DataLocation::Memory;
}
else if (varLoc == Location::Default)
typeLoc = _variable.isCallableParameter() ? DataLocation::Memory : DataLocation::Storage;
else
typeLoc = varLoc == Location::Memory ? DataLocation::Memory : DataLocation::Storage;
isPointer = !_variable.isStateVariable();
}
type = ref->copyForLocation(typeLoc, isPointer);
}
else if (varLoc != Location::Default && !ref)
fatalTypeError(_variable.location(), "Storage location can only be given for array or struct types.");
if (!type)
fatalTypeError(_variable.location(), "Invalid type name.");
}
else if (!_variable.canHaveAutoType())
fatalTypeError(_variable.location(), "Explicit type needed.");
// otherwise we have a "var"-declaration whose type is resolved by the first assignment
_variable.annotation().type = type;
}