CODEWITHSUNDEEP
c++jsonxmlboostboost-propertytree
Nybbit
Nybbit

Reputation: 293

Checking if a path exists in a boost property tree

How do I check if a path exists in a property tree?

Example:

boost::property_tree::ptree tree;

// if path doesn't exist, put value
if (/*...*/)
{
    tree.put("my.path.to.thing", true);
}

Upvotes: 3

Views: 2957

Answers (1)

Nybbit
Nybbit

Reputation: 293

For a simple solution, you can use get_optional()

According to the documentation, if it exists, it returns the value otherwise it returns an uninitialized optional

Example

boost::property_tree::ptree tree;

// if path doesn't exist, put value
if (!tree.get_optional<bool>("my.path.to.thing").is_initialized())
{
    tree.put("my.path.to.thing", true);
}

Upvotes: 4

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