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c++yaml-cpp

Get a pointer to a subordinate YAML::Node

I am writing a config file library, and I'd like to have a pointer to a sub-node to pass to functions expecting YAML::Node*, for example for building up a YAML document.

I can create a new Node and get a pointer easily enough:

YAML::Node* foo = new YAML::Node(); // Null node

and I can add a new sub node easily enough: 

(*foo)["bar"] = baz;

However, I don't know how to get a pointer to (*foo)["bar"]. If I try 

&((*foo)["bar"]);

I get error: taking address of temporary, which is true, because the [] operator returns a YAML::Node. Is there a way to get a pointer to (*foo)["bar"] so that I can pass it to something like 

void f(YAML::Node* const blah) 
{
    (*blah)["banana"] = 1;
}

which is useful, because then I can build up a tree with recursive calls to f.

Solution

  • Just pass a YAML::Node, not a pointer. YAML::Node is already a reference type, so you can pass it like a pointer.