Foam::IOobject ( Foam::fvMesh::defaultRegion, runTime.timeName(), runTime, Foam::IOobject::MUST_READ )
上述代码是摘抄自createMesh.H中进行fvMesh构造时用到的临时IOobject对象的构造代码。
- Foam::fvMesh::defaultRegion的值为"region0",这一部分是作为该IOobject的name_成员;
- runTime.timeName(),返回的是的runTime的量纲部分dimensioned<scalar>的name_,这一部分是作为该IOobject的instance_c成员;
- runTime是作为该IOobject的db_成员;
在由该IOobject构造其它类时这些信息是非常有用的,比如objectRegistry类,regIOobject类等,现在举objectRegistry为例,其以IOobject为参数的构造如下:
Foam::objectRegistry::objectRegistry
(
const IOobject& io,
const label nIoObjects
)
:
regIOobject(io),
HashTable<regIOobject*>(nIoObjects),
time_(io.time()),
parent_(io.db()),
dbDir_(parent_.dbDir()/local()/name())
{
writeOpt() = IOobject::AUTO_WRITE;
}
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