phothinmg / simple-compiler

Simple Compiler with JavaScript

Simple Compiler with JavaScript

String of some math operators to result with javascript.

Learning about compiler with Javascript. This is only for exercise.

Only this four lines of text can be compile.

- sum {number} and {number}
- sub {number} from {number}
- mul {number} with {number}
- div {number} by {number}

string to token

var str = "sum 5 and 4";

var token = transpileString(str).token;

Token

[
  {
    "type": "Operator",
    "value": "sum"
  },
  {
    "type": "Number",
    "value": "5"
  },
  {
    "type": "Expression",
    "value": "and"
  },
  {
    "type": "Number",
    "value": "4"
  }
]

token to ast

var str = "sum 5 and 4";

var ast = transpileString(str).ast;

AST

{
  "type": "Program",
  "body": [
    {
      "type": "Operator",
      "value": "sum"
    },
    {
      "type": "Number",
      "value": "5"
    },
    {
      "type": "Expression",
      "value": "and"
    },
    {
      "type": "Number",
      "value": "4"
    }
  ],
  "sourceType": "text"
}

result

var str = "sum 5 and 4";

var result = transpileString(str).result;

// 9