Method define_function

source/effect_codegen_spirv.cpp:1200–1235

		return res;
	}
	id   define_function(const location &loc, function &info) override
	{
		assert(!is_in_function());

		function_blocks &func = _functions_blocks.emplace_back();
		func.return_type = info.return_type;

		for (const member_type &param : info.parameter_list)
			func.param_types.push_back(param.type);

		add_location(loc, func.declaration);

		// https://www.khronos.org/registry/spir-v/specs/unified1/SPIRV.html#OpFunction
		const id res = info.id =
			add_instruction(spv::OpFunction, convert_type(info.return_type), func.declaration)
				.add(spv::FunctionControlMaskNone)
				.add(convert_type(func));

		if (!info.name.empty())
			add_name(res, info.name.c_str());

		for (member_type &param : info.parameter_list)
		{
			add_location(param.location, func.declaration);

			param.id = add_instruction(spv::OpFunctionParameter, convert_type(param.type, true), func.declaration);

			add_name(param.id, param.name.c_str());
		}

		_functions.push_back(std::make_unique<function>(info));
		_current_function = _functions.back().get();
		_current_function_blocks = &func;

		return res;
	}

	void define_entry_point(function &func) override
	{