Interpreter for Splax, A dynamic programming language I made while learning how compilers and interpreters work.

Splax supports text files with spx file extension. example: main.spx

A simple hello world program in splax:

print "Hello, World!";

Semi-colons at the end of every line is mandatory in Splax.

Splax has following datatypes

These can number literals which can be both integers and floating point numbers.

examples: 1, 2.5, 9

These are string literals defined inside "

examples: "Splax", "Strings are easy"

These are boolean literals which can be either true or false.

examples: true, false

Splax has nulls, the trillion dollar mistale. It can be defined using the null keyword. All uninitialized variables are given the value of null.

examples: null

Splax has following operators:

= - equals

- - Unary negation

and - logical AND

or - logical OR

! - logical NOT

+ - sum

- - difference

* - product

/ - division

% - mod

== - is equals

!= - is not equals

> - is less than

>= - is less than or equals

> - is greater than

>= - is greater than or equals

Splax has only one type of comment, single line comments, which can be defined using // at the beginning of a line.

// This is a comment.
// The Lexer completely ignores any line starting with //
// The Whole line is ignored.

Splax has variables which can be defined using the let keyword without defining any data type, splax can automatically detect datatype at runtime.

syntax:

let variable_name;
let variable_name = initial_value;

example:

let a; // default value is null if nothing is assigned.
let b = 2; // numbers: both integers
let c = 2.5; // and floats
let d = "Strings are easy"; // strings
let e = true; // booleans

Splax variables have scope like any other modern programming language (the term modern here can be understood as the same as modern in modern chess)

let a = 1;
{
    let a = 2;
    print a; // 2
}
print a; // 1

Splax has if else conditionals. It can be defined using the following syntax:

if (condition) {
    // todo
} else {
    // else todo
}

example:

let a = 1;
if (a == 1) {
    print "A is infact 1";
} else {
    print "A is not 1";
}

while loops in splax can be defined using the following syntax:

while (condition) {
    // todo
}

example:

let a = 10;
while (a > 1) {
    print a;
    a = a - 1;
}

Splax has syntactic sugar for for loops.

syntax:

for(initialiser; condition; incrementer) {
    // todo
}

example:

for(let i = 0; i < 10; i = i + 1) {
    print i;
}

Splax have user defined functions, and ability to call them.

A function in splax can be defined using the following syntax:

fn function_name(parameters) {
    // todo
}

example:

fn greet(name) {
    print "Hello " + name;
}

A function can be called using the following syntax:

function_name(parameters);

example

greet("Splax");

splax run main.spx

splax repl

splax

A learning programming language.

Usage: splax <COMMAND>

Commands:
  repl  Interactive repl
  run   Run from a file
  docs  See docs
  help  Print this message or the help of the given subcommand(s)

Options:
  -h, --help  Print help

1. Clone the repo and make sure you have installed rust compiler and cargo. Here's the official installation guide.

2. Build using cargo.

cargo build --release

You can test the interpreter on example present in /examples folder