Static trees

Functions
void	sample_static_trees ()
	how to use static trees in ryml More...

Detailed Description

Function Documentation

void sample_static_trees

(

)

how to use static trees in ryml

shows how to work around the static initialization order fiasco when using a static-duration ryml tree

See also

https://en.cppreference.com/w/cpp/language/siof

Definition at line 7076 of file quickstart.cpp.

Referenced by main().

{
    // Static trees may incur a static initialization order
    // problem. This happens because a default-constructed tree will
    // obtain the callbacks from the current global setting, which may
    // not have been initialized due to undefined static
    // initialization order:
    //
    // ERROR! depends on ryml::get_callbacks() which may not have been initialized.
    //static ryml::Tree tree;
    //
    // To work around the issue, declare static callbacks
    // to explicitly initialize the static tree:
    static ryml::Callbacks callbacks = default_callbacks(); // use default callback members
    static ryml::Tree tree(callbacks); // OK
    // now you can use the tree as normal:
    ryml::parse_in_arena(R"(doe: "a deer, a female deer")", &tree);
    CHECK(tree["doe"].val() == "a deer, a female deer");
}