Header only?

[flaviu22]

Can rapidyaml library used as header only library? I mean, to use it without being compiled?

[biojppm]

https://github.com/biojppm/rapidyaml?tab=readme-ov-file#single-header-file

[flaviu22]

Interesting approach. I have generated a single heade file (I attached here like txt file), and I put that file in my simple test project. Compiled successfully, but when I tried to use objects from your library, I got:

#include <ryml_all.hpp>

int main()
{
	char yml_buf[] = "{foo: 1, bar: [2, 3], john: doe}";
	ryml::Tree tree = ryml::parse_in_place(yml_buf);

	return EXIT_SUCCESS;
}

1>Testrapidyaml.obj : error LNK2019: unresolved external symbol "public: __cdecl c4::yml::Tree::~Tree(void)" (??1Tree@yml@c4@@QEAA@XZ) referenced in function main
1>Testrapidyaml.obj : error LNK2019: unresolved external symbol "class c4::yml::Tree __cdecl c4::yml::parse_in_place(struct c4::basic_substring<char>)" (?parse_in_place@yml@c4@@YA?AVTree@12@U?$basic_substring@D@2@@Z) referenced in function main

which signals me I should add some implementations file (cpp files). When you said this library is inspired from rapidjson/rapidxml projects I thought your library is a real header only library. Never mind.

ryml_all.txt

[biojppm]

It is single header. Did you even skim through that section in the URL?

You need to define the implementation macro: