} while(0)
#define ASSIGN(op, a, b) \
-(ast_expression*)ast_store_new(ctx, INSTR_##op, (a), (ast_expression*)(b))
+(ast_expression*)ast_store_new(ctx, INSTR_##op, (ast_expression*)(a), (ast_expression*)(b))
#define BIN(op, a, b) \
(ast_expression*)ast_binary_new(ctx, INSTR_##op, (ast_expression*)(a), (ast_expression*)(b))