根据上下文，计算布尔表达式的值。 词法分析由ragel完成，语法分析由bison完成，计算由表达式树完成。
目前只支持 ==, !=(<>), <, <=, >, >=, ||, &&, in, nin, contains运算符
自定义类型比较需要重载相应操作符.
contains 只支持vector, set, unordered_set, list, 不支持map类容器.
没有"not contains"运算符, 请用!contains 替代.
示例:
srand(::time(nullptr));
CustomContext custom_context;
custom_context.media_index = 30;
custom_context.app_version.major = 10;
custom_context.app_version.minor = 6;
custom_context.src_id = "308";
custom_context.random = rand()%100;
Bool::Context& context = custom_context;
std::string formular =
R"(media_index == 30 && (src_id == "308" || app_version == "10.5") && (random < 50 || !random < 50) && src_id in ["308", "309", "400" ])";
Bool::Lexer lexer(formular);
Bool::Expression* expression;
Bool::ASTParse parser(lexer, &expression);
int res = parser.parse();
std::cout<<"print:"<Print()<<std::endl;
std::cout<<"final result:"<GetResult(custom_context)<<std::endl;
std::cout<<"parse result:"<<res<<std::endl;
main.cpp中还增加了与sol的执行效率对比
存在内存泄漏
参考文档:
https://www.gnu.org/software/bison/manual/bison.html#Bison-Parser
http://www.colm.net/files/ragel/ragel-guide-6.10.pdf
https://github.com/cucumber-attic/bool
https://archive.codeplex.com/?p=ragelbison