Method finish

crates/cpp/src/lib.rs:667–774

(
        &mut self,
        resolve: &Resolve,
        world_id: WorldId,
        files: &mut Files,
    )

    }

    fn finish(
        &mut self,
        resolve: &Resolve,
        world_id: WorldId,
        files: &mut Files,
    ) -> std::result::Result<(), anyhow::Error> {
        let world = &resolve.worlds[world_id];
        let snake = world.name.to_snake_case();
        let linking_symbol = wit_bindgen_c::component_type_object::linking_symbol(&world.name);

        let mut h_str = SourceWithState::default();
        let mut c_str = SourceWithState::default();

        let version = env!("CARGO_PKG_VERSION");
        uwriteln!(
            h_str.src,
            "// Generated by `wit-bindgen` {version}. DO NOT EDIT!"
        );

        uwrite!(
            h_str.src,
            "#ifndef __CPP_GUEST_BINDINGS_{0}_H
            #define __CPP_GUEST_BINDINGS_{0}_H\n",
            world.name.to_shouty_snake_case(),
        );
        self.finish_includes();

        for include in self.includes.iter() {
            uwriteln!(h_str.src, "#include {include}");
        }

        uwriteln!(
            c_str.src,
            "// Generated by `wit-bindgen` {version}. DO NOT EDIT!"
        );
        uwriteln!(
            c_str.src,
            "\n// Ensure that the *_component_type.o object is linked in"
        );
        uwrite!(
            c_str.src,
            "#ifdef __wasm32__
                   extern \"C\" void {linking_symbol}(void);
                   __attribute__((used))
                   void {linking_symbol}_public_use_in_this_compilation_unit(void) {{
                       {linking_symbol}();
                   }}
                   #endif
               ",
        );
        if self.dependencies.needs_assert {
            uwriteln!(c_str.src, "#include <assert.h>");
        }

        h_str.change_namespace(&Vec::default());

        self.c_src.change_namespace(&Vec::default());
        c_str.src.push_str(&self.c_src_head);