TOY_OPCODE_DECLARE:
	{Declare, type, length, 0} ; {emitString()}

# write value
TOY_OPCODE_READ:
	null   -> {Read, type, 0, 0}
	bool   -> {Read, type, value, 0}
	int    -> {Read, type, 0, 0} ; {value}
	float  -> {Read, type, 0, 0} ; {value}
	string -> {Read, type, leaf, 0} ; {emitString()}

# write assignment
TOY_AST_FLAG_ASSIGN:
	{Read, type(string), name, length} ;
	{emitString()} ;
	{writeCode()} ;
	{Assign, 0, 0, 0} ;

TOY_AST_FLAG_ADD_ASSIGN:
	{Read, type(string), name, length} ;
	{emitString()} ;
	{Duplicate, 0, 0, 0} ;
	{writeCode()} ;
	{Assign, 0, 0, 0}
	{Add, Assign, 0, 0} ;

//subtract, multiply, divide, modulo all mimic add