Syntax / Structure

Language Syntax

Fluency Programming Language follows the JavaScript / ECMAScript (ES6) syntax closely.

Any user with some familiarity of JavaScript can quickly pick up this language. Addtionally, ES6 syntax compatibility allows the FPL code to be highlighted and error-checked in most common Code editors used today.

Hello, World!

A sample FPL program code block:

function main() {
    printf("Hello, World!\n")
    return {}
}

FPL Code Block

The main() function

An FPL script / code block consist of a main() function. The main() function must return a Map object.

function main() {
    let s = 100
    if (s == 5) {
        printf("s is equal to 5")
    } elseif (s < 10) {
        printf("s is less than 10 (and is not 5)")
    } else {
        printf("s is greater or equal to 10")
    }
    return {}
}

note

In the Fluency Platform (processor) pages, sometimes the main() functions can return a status string.

function main() {
    ...
    return "pass" // "drop", "abort", "error"
}

This is a shorthand for:

    return { status: "pass" }

It is also possible to pass in arguments into this function and they can be given a default value

// the function takes an argument s and has a default value of 100
function main({s=100}) {
    if (s == 5) {
        printf("s is equal to 5")
    } elseif (s < 10) {
        printf("s is less than 10 (and is not 5)")
    } else {
        printf("s is greater or equal to 10")
    }
    return {}
}

Comments

Comments are supported with the follow syntax:

function main() {
    // this is a single line comment

    /*
        block
        with multiple lines
        line 3
    */
    return {}
}