Defined in header <fkYAML/node.hpp>

fkyaml::basic_node::empty

boolean empty() const;

Tests whether the node value is empty.
Throws a fkyaml::exception if a basic_node does not have a conatiner nor string value.

Return Value

true if the node value is empty, false otherwise.

Example

#include <iomanip>
#include <iostream>
#include <fkYAML/node.hpp>

int main() {
    // create YAML nodes.
    std::vector<fkyaml::node> nodes = {
        fkyaml::node::sequence(),
        {1, 2, 3},
        {{"foo", true}, {"bar", false}},
        fkyaml::node(),
        true,
        256,
        3.14,
        "Hello, world!"};

    for (const auto& n : nodes) {
        try {
            // call empty()
            std::cout << std::boolalpha << n.empty() << std::endl;
        }
        catch (const fkyaml::exception& e) {
            std::cout << "The node does not have a container nor string value." << std::endl;
        }
    }

    return 0;
}

output:

true
false
false
The node does not have a container nor string value.
The node does not have a container nor string value.
The node does not have a container nor string value.
The node does not have a container nor string value.
false

See Also

• basic_node