在命令行cmd下运行go run main.go
即可进入Monkey语言。
E:\monkey>go run main.go
Hello DESKTOP-EHVOK0M\Administrator! This is the Monkey programming language!
Feel free to type in commands
>> puts("Hello World!")
Hello World!
null实现功能展示
- 最为简单的3种类型的输入输出。（1.整数字面量 2.布尔类型 3.空值）
>> 6
6
>> true
true
>>
>>- 前缀表达式
>> -5
-5
>> -(-5)
5
>> !true
false- 中缀表达式
>> 5+5
10
>> 2*5+1
11
>> (2+3+2)*2+1
15- 条件语句
>> if (true) {return 10;}
10
>> if (false) {return 10;}else {return 66;}
66- return语句
>> return 10
10
>> return "Hello"
Hello- 错误处理
>> 5+
__,__
.--. .-" "-. .--.
/ .. \/ .-. .-. \/ .. \
| | '| / Y \ |' | |
| \ \ \ 0 | 0 / / / |
\ '- ,\.-"""""""-./, -' /
''-' /_ ^ ^ _\ '-''
| \._ _./ |
\ \ '~' / /
'._ '-=-' _.'
'-----'
Woops! We ran into some monkey business here!
parser errors:
no prefix parse function for EOF found- 函数调用
>> let add=fn(a,b,c,d){return a+b+c+d}
>> add(1,2,3,4)
10
>> let addThree=fn(x){return x+3}
>> addThree(3)
6
>> let max = fn(x, y) { if (x > y) { x } else { y } };
>> max(5, 10)
10
>> let factorial = fn(n) { if (n == 0) { 1 } else { n * factorial(n - 1) } };
>> factorial(5)
120
>> let callTwoTimes = fn(x, func) { func(func(x)) };
>> callTwoTimes(3, addThree);
9
>> callTwoTimes(3, fn(x) { x + 1 });
5
>> let newAdder = fn(x) { fn(n) { x + n } };
>> let addTwo = newAdder(2);
>> addTwo(2);
4- 基本字符串操作
>> let giveHello=fn(){"Hello"}
>> giveHello()
Hello
>>
>> let firstName = "Thorsten";
>> let lastName = "Ball";
>> let fullName = fn(first, last) { first + " " + last };
>> fullName(firstName, lastName);
Thorsten Ball
- 数组
>> let a=[1,1+1,1*2+1]
>> a[0]
1
>> len(a)
3- 哈希字符串
>> let myHash = {"name": "Jimmy", "age": 72, "band": "Led Zeppelin"};
>> myHash["name"]
Jimmy
>> myHash["age"]
72
>> myHash["band"]
Led Zeppelin- 内置函数
>> puts("Hello MONKEY!!!")
Hello MONKEY!!!
null
>>具体的注释细节可以查看我的博客！
本项目学习自《用Go语言自制解释器》，respect!!!