Method define_variable

source/effect_codegen_glsl.cpp:936–977

		return res;
	}
	id   define_variable(const location &loc, const type &type, std::string name, bool global, id initializer_value) override
	{
		// Constant variables with a constant initializer can just point to the initializer SSA variable, since they cannot be modified anyway, thus saving an unnecessary assignment
		if (initializer_value != 0 && type.has(type::q_const) &&
			std::find_if(_constant_lookup.begin(), _constant_lookup.end(),
				[initializer_value](const auto &x) {
					return initializer_value == std::get<2>(x);
				}) != _constant_lookup.end())
			return initializer_value;

		const id res = make_id();

		// GLSL does not allow local sampler variables, so try to remap those
		if (!global && type.is_sampler())
		{
			_remapped_sampler_variables[res] = 0;
			return res;
		}

		if (!name.empty())
			define_name<naming::general>(res, name);

		std::string &code = _blocks.at(_current_block);

		write_location(code, loc);

		if (!global)
			code += '\t';

		write_type(code, type);
		code += ' ' + id_to_name(res);

		if (type.is_array())
			code += '[' + std::to_string(type.array_length) + ']';

		if (initializer_value != 0)
			code += " = " + id_to_name(initializer_value);

		code += ";\n";

		return res;
	}
	id   define_function(const location &loc, function &info) override
	{
		const id res = info.id = make_id();