ajaypokharel / pokh

Pokh is a functional programming language that utilizes sets of defined Grammars and parsers to compile into source code

The Pokh Programming Language

Pokh is programming language that supports functional programming to some level. This is my attempt at creating (and learning how to create one) a programming language from scratch. This is a work in progress, so one might not be able to code up a complex program using this.

Features of the programming languages

• Variable Asignments
• Functions
• Data Types such as Integers, Double, Strings, Boolean
• Data Structures such as Dynamic Arrays (list), Dictionaries
• Looping Mechanisms (for loop)
• Conditionals
• Built-in Functions
• Numerical Operations
• Commenting (both in-line and not in-line)

Syntax

Variable Assignments

// pokh uses ':=' as assignment operator
a := 1
b := "Hello World"
c1 := [1, 2, 3]

Comments

// This is how to write a comment
 a := 1 // You can write a comment here too

Data Types/Structures

// an integer
num1 := 12

// a double
num2 := 4.13

// a string
str1 := "Hello World"
str2 := "12Hi"

// boolean
bool1 := true
bool2 := false

// a list
list1 := [1, 2, 3]
list2 := [1, "pokh", "java", 29]

// a dictionary
dict_1 := {
    1: "pokh",
    2: "java",
    3: "javascript"
    4: [1,2,3]
}


// some important built-in functions

stdout("hello world")   // outputs hello world to the screen
sum(args)   // returns the sum of the arguments
mod(x, y)   // returns x modulo y
pow(x, y)   // returns x ^ y
max(args)   // return maximum from the args
min(args)   // returns minimum from the args
len(input)   // returns the length of the input (must be an iterable)

// conditionals

if a == 2 {
    stdout("It's two")
} else if a > 2 {
    stdout("It's more")
} else {
    stdout("Invalid")
}

// functions
// at this point our function do no support return statement but we are working on that
myfunc(x, y) {
    m := sum(x,y)
    j := mod(x, y)
    stdout(m, j)
}

// for loop

for i in list1 {
    stdout(i)
}

Test Pokh

• Clone the repo

• Copy and paste the following code in a .pokh file

a := [1, "a", 4]


for i in a {
    stdout(i)
}

age:= 12.5
// this
stdout("Hello", age)    // comment

myfunc(x, y) {
    m := sum(x,y)
    j := mod(x, y)
    stdout(m, j)
}

myfunc(10, 3)


if a == 2 {
    stdout("It's two")
} else if a > 2 {
    stdout("It's more")
} else {
    stdout("Invalid")
}

• Run ./run-pokh.sh <name of the file>
• You should see the output. Feel free to modify the code

Future Works

• Add stdin function to take input from users
• Add return statement to the functions
• Add typing features