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pua-lang

PUA Programming Language written in Rust.

What's pua-lang?

pua-lang is a dialect of The Monkey Programming Language, intended to mirror the inspirational babble of Alibaba managers ("Aba-aba"). The name "pua" refers to the manipulative way Alibaba treats its employees -- much like how pickup artists treat their trophies.

This implementation is a fork of rs-monkey-lang. Monkey is a programming language designed to learn interpreters. It comes from Writing An Interpreter In Go.

Try pua-lang!

with wasm playground

https://flaneur2020.github.io/pua-lang/

We are aware that the output streams don't quite work. Rust doesn't really have I/O redirection and wasm32-unknown-unknown has no I/O by default.

with REPL

$ git clone https://github.com/flaneur2020/pua-lang.git
$ make repl

Documentation

⚠️ Please note that there may be some mistakes.

Summary

  • Everything Monkey has:
    • C-like syntax
    • variable bindings
    • integers and booleans
    • a string data structure
    • an array data structure
    • a hash data structure
    • arithmetic expressions
    • built-in functions
    • first-class and higher-order functions • closures
  • Unicode identifiers (UAX #31, XID) plus monetary extensions ([¥$_]) and an overly-lax definition of Emojis.
  • Rust-compatible double-quoted string syntax.
  • Ridiculous naming for the Aba-aba. Comparison with Monkey:
Monkey pua-lang Explanation
if 细分 "specialization"
else 路径 "pathway"
while 闭环 "closed loop"
true 三七五 "3.75", a passing performance evalulation result
false 三二五 "3.25", a failing performance evalulation result
let 赋能 "empower"
fn 抓手 "handle", as in getting a handle on things
return 反哺 "repay", used in Alibaba as a general term for feedback in systems
Array 组合拳 "combo move"; not yet a word in the language
Hash 载体 "carrier"; not yet a word in the language
= 对齐 "align"
+ 联动 "linkage"
- 差异 "difference"
/ 倾斜 "tilt"
puts 输出 "output"
quit 淘汰 "eliminate"
(atoi) 量化 quantify

The precise set of renames may change from time to time as we explore new avanues of profit pathways to the full enablement of our shareholders customers. You are encouraged to (ahem) carefully study the spirit of src/lexer/mod.rs and src/evaluator/builtins.rs in order to align yourself with Ali-speak and maximize your output.

Syntax overview

An example of Fibonacci function.

赋能 fib = 抓手(x) {
  细分 (x 对齐 0) {
    反哺 0;
  }
  细分 (x 对齐 1) {
    反哺 1;
  } 路径 {
    反哺 fib(x - 1) 联动 fib(x - 2);
  }
};

fib(10);

细分

细分 supports the general 细分. 路径 exists, but 细分 路径 does not exist yet.

细分 (三七五) {
  10;
} 路径 {
  5;
}

闭环

With the 闭环 we can execute a set of statements as long as a condition is 三七五.

闭环 (三七五) {
    输出("年年有抓手");
}

Operators

It supports the general operations.

1 + 2 + (3 * 4) - (10 / 5);
!三七五;
!三二五;
+10;
-5;
"年年有抓手" + " " + "岁岁有闭环";

反哺

It returns the value immediately. No further processing will be executed.

细分 (三七五) {
  反哺;
}

赋能 不变 = 抓手(工资p6) {
  反哺 工资p6;
};

不变("👨‍💻🐒烧酒");

赋能

赋能, such as those supported by many programming languages, is implemented. Variables can be defined using the 赋能 keyword.

Format:

赋能 <identifier> = <expression>;

Example:

赋能 x = 0;
赋能 y = 10;
赋能 福报 = add(5, 5);
赋能 alias = 福报;
赋能 identity = 抓手(x) { x };

Literals

Five types of literals are implemented.

Integer

Integer represents an integer value. Floating point numbers can not be handled.

Format:

[-+]?[1-9][0-9]*;

Example:

10;
1234;

Boolean

Boolean represents a general boolean type.

Format:

三七五 | 三二五;

Example:

三七五;
三二五;

赋能 truthy = !三二五;
赋能 falsy = !三七五;

String

String represents a string. Only double quotes can be used.

Format:

"<value>";

Example:

"Monkey Programming Language";
"Hello" + " " + "World";

组合拳

组合拳 represents an ordered contiguous element. Each element can contain different data types.

Format:

[<expression>, <expression>, ...];

Example:

[1, 2, 3 + 3, fn(x) { x }, add(2, 2), 三七五];

赋能 组合拳 = [1, 三七五, 抓手(x) { x }];

组合拳[0];
组合拳[1];
组合拳[2](10);
组合拳[1 + 1](10);

载体

载体 expresses data associating keys with values.

Format:

{ <expression>: <expression>, <expression>: <expression>, ... };

Example:

赋能 载体 = {
  "name": "Jimmy",
  "age": 72,
  三七五: "a boolean",
  99: "an integer"
};

载体["name"];
载体["a" + "ge"];
载体[三七五];
载体[99];
载体[100 - 1];

抓手

抓手 supports functions like those supported by other programming languages.

Format:

抓手 (<parameter one>, <parameter two>, ...) { <block statement> };

Example:

赋能 add = 抓手(x, y) {
  反哺 x 联动 y;
};

add(10, 20);

赋能 add = 抓手(x, y) {
  x 联动 y;
};

add(10, 20);

If 反哺 does not exist, it returns the result of the last evaluated expression.

赋能 addThree = 抓手(x) { x + 3 };
赋能 callTwoTimes = 抓手(x, f) { f(f(x)) };

callTwoTimes(3, addThree);

Passing around functions, higher-order functions and closures will also work.

Built-in Functions

You can use 1 built-in function 🚀

输出(<arg1>, <arg2>, ...): void

It outputs the specified value to stdout. In the case of Playground, it outputs to console.

输出("年年有抓手");
输出("岁岁有闭环!");